aaf -hermannelson classroom unit ventilators...aaf®-hermannelson® classroom unit ventilators...

AAF®-HermanNelson® Classroom Unit VentilatorsDigital Ready, MicroTech II™ (“F” Vintage)Field Controls by Others

©2007 McQuay International

Vertical Floor Models AVS, AVV, AVB, and AVR

Before beginning installation, please read this publication in its entirety.Develop a thorough understanding before starting the installation procedure.

This manual is to be used as a guide. Each installation is unique, so only general topics are covered. The order in which topics are covered may not be those required for the actual installation.

IMPORTANT!

C

InstallationManual IM817-2

Group: UnitVentilator Part Number: 106506223

Date: December2007

Table of ContentsNomenclature ModelAVCeilingUnitVentilatorDataPlateDetails........................1 DataPlateLocation.........................................................................2

Receiving & Handling VisibleLossorDamage...................................................................2 ConcealedLossorDamage............................................................2 Storage............................................................................................2 LiftingUnit.......................................................................................2

Pre-Installation Information Safety...........................................................................................2-3

Pre-Installation Considerations ProperlyIdentifyUnitVentilator(s)...................................................3 UncrateandInspecttheUnitVentilator(s).......................................3 WallOpenings,Louvers,andVentiMaticShutter............................3 VentiMaticShutterAssembly...........................................................3 Table1-ApproximateShippingWeights,PhysicalData.................3

Installing Louvers ....................................................................................4-8 LouverDetails.................................................................................4Louver Installations with Typical Unit Configurations UnitConfiguration-TypeAL............................................................5 UnitConfiguration-TypeAN...........................................................6 UnitConfiguration-TypeAK...........................................................6 UnitConfiguration-TypeAP...........................................................6 TypicalInstallationMethods.........................................................7-8

Installing the VentiMatic Shutter ............................................................8-9

Before Setting the Unit in Place RemovingUnitfromSkid.................................................................9 MountingHoles,PipingandElectricalKnockout Locations&Dimensions..................................................................9

Drain Pan Adjustment Procedure......................................................................................10

Typical Floor Unit Installation ................................................................. 11

Typical VentiMatic Shutter & Draftstop Installation .............................. 11

Unit Ventilator Installation ....................................................................... 12

Making Piping Connections ForAllSystems.............................................................................12 WaterCoilConnections.................................................................13 2-pipeChilledWater/HotWaterSystems......................................13 AfterBrazing..................................................................................13 ForWaterSystems........................................................................13

Coil Headers, Locations HeatingOnly..................................................................................14 CoolingOnly..................................................................................14 ChilledWater&HeatingCoils.......................................................15 DirectExpansionCoils&HeatingCoils........................................15 Reheat...........................................................................................16

Typical Valve Packages FaceandBypass-MicroTechII 2-wayand3-wayEnd-of-CycleValves..........................................17 2-wayand3-wayModulatingValves–MicroTechII......................18 ModulatingValveSpecifications–MicroTechII.............................19 SteamModulatingValveSelection–MicroTechII.........................20 HotWaterandChilledWaterValveSelection–MicroTechII........20

Typical Piping Arrangements Heating–HotWaterEndofCycleValvePiping............................21 Cooling–ChilledWaterEndofCycleValvePiping.......................21 TypicalWaterCoilPiping–EOCValvePiping................................22 Steam–TypicalModulatingValvePiping........................................22

For Steam Systems Theoptionalfactory-suppliedAAF-HermanNelsonMicroTechII

ModulatingControlValve...............................................................23 TypicalSteamCoilPiping..............................................................23Heating–Modulating Valve Piping HotWater(or2-pipeCW/HW)ModulatingValvePiping...............24 2-wayModulating,NormallyOpen,HotWateror2-pipeCW/HW

ValvePiping(typical).....................................................................24 3-wayModulating,NormallyOpen,HotWateror2-pipeCW/HW

ValvePiping(typical).....................................................................24Cooling–Chilled Water Modulating Valve Piping 2-wayModulating,NormallyClosed,ChilledWaterValvePiping

(typical)..........................................................................................25 3-wayModulating,NormallyClosed,ChilledWaterValvePiping

(typical)..........................................................................................25

Condensate Piping ................................................................................... 26 DirectExpansion(DX)R-22Piping...............................................26

Unit Ventilator Split Systems Guidelines ............................................... 27 CheckingSystemCharge..............................................................28 DeterminingSubcooling................................................................28 DeterminingSystemSuperheat....................................................29 SuperheatAdjustment...................................................................29

Making Control Connections MicroTechIIUnitMountedDDCControlComponents–ModelsAVS,

AVV,andAVR...........................................................................30-32 EconomizerControlCapabilities...................................................32 EconomizerforReheat..................................................................32 LocalUserInterface......................................................................32 OperatingModeStates(4)............................................................32 FanStates(4)................................................................................32 OccupancyModes(4)...................................................................32 MicroTechIIWiringDiagram–Typical...........................................33MicroTech II Unit Electrical Connections .............................................................. 34 Procedure......................................................................................34 MicroTechIIRemoteWallMountedSensor..................................35 FieldWiringRemoteMountedTemperatureSensor.....................36 InstallingtheRemoteMountedTemperatureSensor...............36-38Digital Ready™–Face & Bypass Control Components ModelAVS.....................................................................................39 DigitalReadyWiringDiagram–Typical..........................................40 DigitalReadyUnitMountedTemperatureSensor Specifications................................................................................41 DigitalReady–DamperActuatorSpecifications OutdoorAir/ReturnAirDamperActuator.......................................41 Face&BypassDamperActuator..................................................41Digital Ready Unit Electrical Connections Procedure......................................................................................42Controls by Others Components ........................................................................... 43 ControlsbyOthersWiringDiagram–Typical.................................44 ControlsbyOthers–ElectricalConnections...................................45 Procedure......................................................................................45 ElectricHeatWiringDiagram–Typical...........................................46 ElectricHeating–StandardMotorCapacities,Amps,WireSizing,

andOverCurrentProtection.........................................................47 ElectricHeating–HighStaticApplicationsCapacities,Amps,Wire

Sizing,andOverCurrentProtection..............................................48

Cabinets Draftstop™System/WindowDown-draftInstallation................49-51 InstallingUnitVentilatorEndPanels........................................51-52

Prepare Unit Ventilator for Start-up ........................................................ 52 OilingtheFanShaftEndBearing..................................................52

Filter(s) ...................................................................................................... 53

Complete Check, Test and Start Procedure ........................................... 53

Installer’s Responsibility Protectyourinvestment-readcarefully.......................................53

IM 817-2 Page 1 of 58

BD= BasicLonMarkSCCw/oTCw/CO2BE= BasicMetasysN2Openw/oTCw/CO2BF = BasicStand-Alonew/TCw/CO2BG= BasicStand-AloneMasterw/TCw/CO2E1 = ExpandedStand-Alonew/oTCE2 = ExpandedStand-AloneMasterw/oTCE3 = ExpandedStand-AloneServantw/oTCE4 = ExpandedBACnetMS/TPw/oTCE5 = ExpandedLonMarkSCCw/oTCE6 = ExpandedMetasysN2Openw/oTCE7 = ExpandedStand-Alonew/TCE8 = ExpandedStand-AloneMasterw/TCE9 = ExpandedStand-Alonew/oTCw/CO2EA= ExpandedStand-AloneMasterw/oTCw/CO2EB= ExpandedStand-AloneServantw/oTCw/CO2EC= ExpandedBACnetMS/TPw/oTCw/CO2ED= ExpandedLonMarkSCCw/oTCw/CO2EE = ExpandedMetasysN2Openw/oTCw/CO2EF = ExpandedStand-Alonew/TCw/CO2EG= ExpandedStand-AloneMasterw/TCw/CO2L1 = LeadingStand-Alonew/oTCL2 = LeadingStand-AloneMasterw/oTCL3 = LeadingStand-AloneServantw/oTCL4 = LeadingBACnetMS/TPw/oTCL5 = LeadingLonMarkSCCw/oTCL6 = LeadingMetasysN2Openw/oTCL7 = LeadingStand-Alonew/TCL8 = LeadingStand-AloneMasterw/TCL9 = LeadingStand-Alonew/oTCw/CO2LA= LeadingStand-AloneMasterw/oTCw/CO2LB= LeadingStand-AloneServantw/oTCw/CO2LC= LeadingBACnetMS/TPw/oTCw/CO2LD= LeadingLonMarkSCCw/oTCw/CO2LE = LeadingMetasysN2Openw/oTCw/CO2LF = LeadingStand-Alonew/TCw/CO2LG= LeadingStand-AloneMasterw/TCw/CO2 10. DischargeAB=21-7/8"Unit,TopBarGrilleDischarge,FullAdapterBackwClosedPipe TunnelwSolidBackAK= 21-7/8"Unit,TopBarGrilleDischarge,PartialAdapterBackwOpenPipe TunnelAL =16-5/8"Unit,TopBarGrilleDischargeAM=21-7/8"Unit,TopBarGrilleDischarge,2"StepdownFullAdapterBackw ClosedPipeTunnelAN=21-7/8"Unit,TopBarGrilleDischarge,FullAdapterBackwClosedPipe TunnelAP =21-7/8"Unit,TopBarGrilleDischarge,PartialAdapterBackwClosedPipe Tunnel,TopDuctIntake

11. Return Air (RA) / Outside Air (OA)22 = RABottomFront/OARearDuctCollar24 = 100%RABottomFront/NoOAOpening/NoOA/RADampers30 = RABottomFrontwDraftStop/OARearDuctCollar

12. Power ConnectionG = BoxwSwitch

13. ColorB = PuttyBeigeG = SoftGrayI = AntiqueIvoryW = OffWhite

14. SKUB = StandardDeliveryC = ExtendedDelivery

15. Product Style1

Field-InstalledAccessoriesmayaccompanyUnitVentilator(s),ormaybeshippedseparately.Thesemayinclude:AdapterBacks;AluminumLouvers;AluminumGrilles;AuxiliaryDrainPans;Controls/Sensors;EndPanels;SpareFilters;MicroTechIIControls,RemoteWallSensors(temperature);EndofCycleDDCValve;ModulatingDDCValves;Subbases.Seeinstructionsshippedwithaccessoriesandinstallaccordingtotheseandtheplans.

1. Product CategoryU = UnitVentilator

2. Product Identifier*AVS = Floor,FaceandBypassDamper,Heat/Cool,HeatOnly,CoolOnlyAVV = Floor,ValveControl,HydronicorElectricHeat/Cool,HeatOnly,CoolOnlyAVR = Floor,ValveControl,HydronicorElectricReheat/DehumidAVB = Floor,FaceandBypassDamper,HydronicReheat*Endpanelsnotincluded;Orderedasaccessory,shippedseparatelyboxed

3. Design Series5 = EDesign6 = FDesign

4. Nominal Capacity, cubic feet per minute (cfm)S07 =750S10 =1000S13 =1250S15 =1500

5. Voltage, volts, phase, Hertz (v-Hz-ph)A = 115-60-1C = 208-60-1G = 230-60-1J = 265-60-1D = 208-60-3H = 230-60-3K = 460-60-3

6. Cooling OptionsU = 2-rowChilledWater/HotWater,2-pipeD = 3-rowChilledWater/HotWater,2-pipeE = 4-rowChilledWater/HotWater,2-pipeF = 5-rowChilledWater/HotWater2-pipeG = DirectExpansion(DX)S = 3-rowChilledWaterV = 2-rowChilledWaterW = 4-rowChilledWaterY = 5-rowChilledWater

7. Heating Options00 = None12 = LowElectricHeat,3-element13 =HighElectricHeat,6-element65 = 1-row,HotWater66 = 2-row,HotWater67 = 3-row,HotWater68 = LowCapacitySteam69 = HighCapacitySteam78 = LowCapacitySteam,OppositeEndDrain79 = HighCapacitySteam,OppositeEndDrain

8. Hand Orientation [Right (RH) Left (LH)]A = LHBothCoils(onlywControlsbyOthers)B = RHBothCoils(onlywControlsbyOthers)D = RHElectricHeating,OneCoilE =LHHeating,RHCoolingF = RHHeating,LHCoolingG = RHElectricHeating,LHCoolingR = LHSingleCoilS = RHSingleCoil

9. Controls (TC = Time Clock, CO2 = CO2 Sensor) 23 =FieldMountedControlsbyOthers17 = DigitalReady/withDamperActuators,(3)@10kNTC Sensors,3Terminal Strips,75VA24VoltT’fmr,w/oUVControllerB1 = BasicStand-Alonew/oTCB2 = BasicStand-AloneMasterw/oTCB3 = BasicStand-AloneServantw/oTCB4 = BasicBACnetMS/TPw/oTCB5 = BasicLonMarkSCCw/oTCB6 = BasicMetasysN2Openw/oTCB7 = BasicStand-Alonew/TCB8 = BasicStand-AloneMasterw/TCB9 = BasicStand-Alonew/oTCw/CO2BA= BasicStand-AloneMasterw/oTCw/CO2BB= BasicStand-AloneServantw/oTCw/CO2BC= BasicBACnetMS/TPw/oTCw/CO2

Field 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Model U AVS 6 S07 A S 65 E 23 AL 22 G B C 1

Table 1 - Unit Ventilator (Floor Type) Data Plate - Specific Information

of 58 IM 817-2

Pre-Installation Information■ Beforebeginninginstallation,pleasereadthispublicationinits

entirety.

■ Directionsgiveninthisbulletinforrightandleftsidesassumea positionfacingtheindoorsideoftheunitventilator.

■ Beforebeginninginstallation,ifprovided,removetheprotectiveplastic film covering the unit painted panels.

Plastic packaging is a suffocation hazard, dispose of properly. Keep away from children.

SafetyFollowallsafetycodes.Wearsafetyglassesandworkgloves.Use a quenching cloth for brazing operations. Have a fireextinguisheravailable.Followallwarningsandcautionsintheseinstructionsandattachedtotheunit.ConsultapplicablelocalbuildingcodesandNationalElectricalCodes(NEC)forspecialrequirements.Recognizesafetyinformation.Whenyouseeasafetysymbolontheunitorintheseinstructions,bealerttothepotentialforpersonalinjury.UnderstandthemeaningsofthewordsDANGER,WARNING, and CAUTION. DANGER identifies the most serioushazardsthatwillresultindeathorseverepersonalinjury;WARNINGmeansthehazardscanresultindeathorseverepersonal injury; CAUTION identifies unsafe practices that canresultinpersonalinjuryorproductandpropertydamage.Improperinstallation,adjustment,service,maintenance,orusecan cause explosion, fire, electrical shock, or other conditionswhichmayresultinpersonalinjuryorpropertydamage.Thisproductmustbeinstalledonlybypersonnelwiththetraining,experience,skills,andapplicablelicensingthatmakeshim/her“aqualified professional HVACR installer.”

Make sure lifting equipment can handle the weight of the unit safely. Personal injury may result if improper lifting and moving methods are used. (See table 2, page 3 for approximate shipping weights)

Use 72" length forklift tines, short tines will damage the unit bottom. Improper handling can damage internal components. Do not stand the unit on end or stack (see figure 2 & 3)

Model AV Floor Unit Ventilator InstallationModels AVV, AVR, AVS, AVB, and AVR

Receiving & HandlingThisproductwascarefullypackedandthoroughlyinspectedbeforeleavingthefactory.Responsibilityforitssafedeliverywasassumedbythecarrieruponacceptanceoftheshipment.Claimsforlossordamagesustainedintransitmustthereforebemadeuponthecarrier,asfollows:

Visible Loss or DamageAnyexternalevidenceoflossordamagemustbenotedonthefreightbillorcarrier’sreceipt,andsignedbythecarrier’sagent.Failuretoadequatelydescribesuchexternalevidenceoflossordamagemayresultinthecarrier’srefusingtohonoradamageclaim. The form required to file such a claim will be supplied by thecarrier.

Concealed Loss or DamageConcealedlossordamagemeanslossordamagewhichdoesnotbecomeapparentuntiltheproducthasbeenunpacked.Thecontentsmaybedamagedintransitduetoroughhandlingeventhoughthecartonmaynotshowexternaldamages.Whenthedamageisdiscovereduponunpacking,makeawrittenrequestforinspection by the carrier’s agent within fifteen (15) days of thedeliverydate.Fileaclaimwiththecarriersincesuchdamageisthecarrier’sresponsibility.

StorageIf equipment is stored for any length of time before installation,it should remain in its shipping packaging in a clean, dry, climatecontrolledarea.

Lifting UnitAforkliftorotherliftingdeviceisneededtoinstallthisproduct.

Figure 1 - Data Plate Location

Figure 2 - Stack Units Maximum 2 High as Shown

2 high

CorrectIncorrect

4'6'

Figure 3 – Forklift Lifting Requirements

Lifting Points

WARNING

CAUTION

WARNING

IM 817-2 Page 3 of 58

Disconnect all electrical power before servicing unit. Electrical shock will cause severe injury or death.

Hazardous Voltage!Use copper conductors only. Unit terminals are not designed toaccept other types of conductors. Failure to do so may causedamage to the equipment.

Personal injury hazard. Wear protective gloves to avoid possible cuts and abrasions from exposed edges. Avoid contact with sharp edges.

Cleaning agents may cause serious damage to internal components, such as aluminum coils and electronic controls, etc. Do not operate unit ventilator while building maintenance cleaning agents are in use.

Pre-Installation ConsiderationsProperly Identify Unit Ventilator(s)To be sure the correct unit ventilator(s) is/are installed in thecorrectlocation(s),theinstallermustcheckthepackinglistandunitidentification/tagging number(s) against the plans. Further, the unitdata plate, (see figure 1) located on the lower right end of the unit ventilator, contains specific information of standard components as listedinTable1.

Figure 4 - Shipping Envelope Contents - Located in right end compartment of unit.

Uncrate and Inspect the Unit Ventilator(s)Carefullyremovethepackaging,remainingalerttoanysignsofshippingdamage.Becarefulnottodiscardcomponentsthatmaybeincludedwiththepackaging.(Youmaywanttoretainsomeorallofthepackagingtoprovidejobsiteunitlocationinformationandtemporaryprotectionfortheunitventilatorafterinstallation.)Besuretodisposeofplasticpackagingandprotectivecardboardproperly,inaccordancewithlocalrecyclingrulesandguidelines.If unit is damaged, file a claim with the carrier. Notify the local AAF®-HermanNelsonUnitVentilatorrepresentativeimmediately.

Wall Openings, Louvers, and VentiMatic™ ShutterPriortounitinstallation,besurethattheexteriorwallopeningsandlouvers, as applicable, are ready and in accordance with the jobplans.VerticalFloorModelsAVS,AVV,AVB,AVRare typically installedinfrontofawallopeningcontainingaproperlysizedlouverthatisdesignedtoletinoutsideairwhilepreventingwater(suchasrain)fromgettingpastthelouverandintotheunititself.Aweather-tightsealkeepsunwantedairandmoisturefromenteringtheoccupiedspace.SeeFigures6through21,andtable1forvariouslouverdetails.

VentiMatic™ Shutter AssemblyInmany installations,anAAF®-HermanNelson®VentiMaticShutterAssembly is specified. See figure 5. This one-way shutter is a continuously variable,gravityactuated,roomexhaustvent thatoperates indirectresponse to positive static pressure. It opposes any airflow into the roomandallowsaslightpositivepressure.ItisimportantthattheVentiMaticshutterandunitventilatorlouversaremountedonthesamewall.Thisneutralizestheeffectofthewind.Forcing excess air into the room through the unit ventilator louverovercomesthesamewindpressurethatworkstokeeptheVentiMaticshutterclosed.ThispreventsroomairexhaustingfromtheroomthroughtheVentiMaticshutter.

Note: Birdscreen and louver are shipped in one (1) piece.

Figure 5 – VentiMatic Shutter Assembly

Outside

Louver

VentiMatic Shutter

RoomsideRelief Air

Models Shipping Weight Approx. Shipping Filter Size Unit Length* Number AVS, AVV, lbs. (kg) Weight lbs. (kg) in. (mm) in. (mm) of Fans AVR, AVB 165/8"Units 217/8"Units

S07 350 (168) 370 (163) 10 x 36.5 x 1

62 (1575) 2 (254 x 927 x 25)

S10 425 (193) 445 (202) 10 x 48.5 x 1

74 (1880) 3 (254 x 1232 x 25)

S13 495 (225) 525 (238) 10 x 60.5 x 1

86 (2174) 4 (254 x 1551 x 25) S15 570 (259) 600 (272) Two: 10 x 36.5 x 1

98 (2489) 4 (254 x 927 x 25)

Table 2 - Approximate Shipping Weights, Physical Data

* Measurement is without end panels. All unit ventilators are 30" (762 mm) high.

DANGER

WARNING

CAUTION

WARNING

of 58 IM 817-2

Figure 6 – Horizontal and Vertical Blade Louvers, Without Flange, (see Caution below for louver blade orientation and drainage)

Figure 7 – Horizontal and Vertical Blade Louvers, Without Flanges With Grille or With Flange Without Grille

Louver drain lipGrille/Louver with weep hole

Vertical Blade LouverHorizontal Blade Louver

Flange

Flange

Outside Air

Outside Air

Outside Air

Bird Screen On Side Toward Unit

Vertical Louver with Flange, without Grille

Horizontal Louver without Flange, with Grille

Locate Drain Lip at bottom of vertical louver to allow proper drainage. For horizontal louvers, the louver blades should face down for proper drainage. Bird screen should always be on side toward unit.

Bottom

Figure 8 – Rear of Horizontal Blade Louver with Birdscreens and Flange.

Installing LouversLouver Details

CAUTION

IM 817-2 Page 5 of 58

Figure 10 -165⁄8" (422mm) Deep Unit with Open Pipe Tunnel & High Louver Application with Chased Wall

Louver

Floor Line

Piping

Louver

Not LessThan 3" (76mm)

Not MoreThan 21" (533mm)

Sealed Cement Mortar;Pitch AwayFrom UnitProvide Drainage

Piping

Floor Line

Figure 9 - The 165/8” (422mm) Deep Unit with Open Pipe Tunnel and Standard Louver Location

Louver Installation With Typical Unit Configurations

Unit Configuration Type AL

1"(25mm)

Important:Gasket sealing surface is required.


Lintel(By Others)

Figure 11 - Above Floor Level Outdoor Air Intake Using Arrangement AV or AL With Accessory Closed Pipe Tunnel

Piping

Floor Line

Lintel (By Others)

Intake Louver

Not Less Than 3"

Not More Than 28"

Insulated Closure Plate Accessory

ProvideDrainage


Figure 12 - Floor Level Outdoor Air Intake With Window Below Unit Top Using Arrangement AL And 9˝ “Finished” (Painted) Accessory (Uninsulated) Closed Pipe Tunnel

Unit Configuration Type AL

Lintel (By Others)

Intake Louver


Sash Piping

Painted Insulated Closure Plate Accessory

Floor Line

Accumulated moisture can cause property damage if not properly drained. Installing contractor must provide such drainage.

Sealed Cement Mortar;Pitch AwayFrom Unit

Lintel(By Others)

1"(25mm)



1"(25mm)

1"(25mm)

CAUTION

of 58 IM 817-2

Figure 15 – The 217/8” (556mm) Deep Full Adapter Back Unit with Closed Pipe Tunnel, Ducted with Top Intake

Figure 16 – 217/8" (556mm) Deep Partial Adapter Back Unit with Open Pipe Tunnel

Intake Louver

Not More Than 12"

Unit Configuration Type AP Unit Configuration Type AK

Figure 13 - 217⁄8" (556mm) Deep Full Adapter Back Unit With Standard Louver Application

Figure 14 - 217⁄8" (556mm) Deep Full Adapter Back Unit with High Louver Application

Not MoreThan 28"(711mm)

Unit Configuration Type AN

Louver

Piping


Lintel(By Others)

Piping

Floor Line

Sealed Cement Mortar; Pitch Away From Unit


Louver

Lintel (By Others)Piping

Piping


Piping

Piping


Louver Installation With Typical Unit Configurations

Lintel(By Others)

Gasket Seal

Intake Louver

Piping

Piping

Window Sash

“Goose Neck”Insulated Duct (By Others)

Duct Collar (By AAF)

Note:Arrangement AB with full metal back panel, similar to configuration type AN. (Outside air opening to be cut and sealed by others.)

Floor Line

Floor Line

Floor Line

1"(25mm)

1"(25mm)



IM 817-2 Page 7 of 58

Installing Louvers Typical Installation MethodsIf the fresh air opening has not yet been made, see figures 9 through 16 for the recommended locations and the job-specific plans for the exact location.Followlocalcodes.

Cutthewallopeningsothatitisslightlylargerthanthelouverbeinginstalled.Fordimensions,seeTable3.Iftheopeningisalreadythere,measuretobesurethereisaminimumof3/8"(9mm)clearancearoundallsides.Formasonryinstallations,a lintelmustbeinstalledabovealllouvers.

Inthickwallapplications,theportionofthewallbetweenthelouverandtheunitistheoutsideairplenum.Linethisplenumareawith3/8"(9mm)mortarorothersuitablematerial.Insomeapplications,thejobspecifications require a metal sleeve connection between the louver and theunit.Ifusingsuchasleeve,properlycaulkittoensureaweather-tightseal.Thisiscriticalinpreventingfreeze-ups,colddrafts,andairinfiltration. Be sure the wall is smooth, square, and provides a suitable matingsurface.

Beforesettingthelouver,constructasloping,sealedcementmortarbaseto drain unwanted moisture to the outside, (see figure 17). Be sure the mortarbaseis1"(25mm)thickattheunitandtaperstowardthelouver.Themortarattheunitalsoactsasabackingagainstwhichtheopencellgasketoftheunititselfcanseal.Thisiscriticalinpreventingwaterleaksandairleaksundertheunit.Besurethesealedcementmortarbase is smooth and flush with the interior wall.If it is not possible to construct a sloping mortar base, then field-supplied flashing is required. See figure 18. The flashing should terminate flush withtheexteriorofthebuilding.Placeabeadofcaulkunder the flashing

topreventmoisturefromwickingbacktotheunit.Donotcaulkthejoint between the louver and the flashing. This joint is designed to let unwantedmoistureescape.


See figures 6 through 19. Before setting the louver, be sure the drain lip(verticallouver)areatthebottom,horizontallouverbladesfacedown and the bird screen is towards the unit. See figures 20 and 21. Placeaheavybeadofcaulkalongthetopandthetwoverticalsidesofthelouver,leavingthebottomuncaulkedsothatifmoisturegetsintotheareabetweenthelouverandtheunit,itcandraintotheoutside,unrestricted.

If the louver is supplied with flanges, (see figure 20) place an additional bead of caulk on the inside of the top and side flanges that come in contact with the building facade. Do not caulk the bottom flange. Placethelouverintheopeningandpushittightagainstthesuppliedbuilding,fasteningittotheexteriorofthebuildingusingfasteners(byothers)appropriate to theinstallation.Seal thetopandsideswithawaterproofcaulktomakeitweather-tight.Donotcaulkthebottomofthe louver; doing so might trap unwanted moisture behind the flange. (See figure 20)

If the louver is supplied with no flanges, (see figure 21) place the louver intheopeningsothatitisrecessedaminimum1/16"(2mm)beyondthe building facade or as directed in the architectural plans. If specified intheplans,securethelouverinthewallusingmechanicalfasteners(supplied by others) appropriate to the installation. (See figure 19 for suggestedfastening).Withthelouversolidlyinplace,runabeadofcaulkaroundtheperimeterofthelouvertosealitweather-tight.Donotplugtheweepholes(horizontallouver)orthedripline(verticallouver). This might restrict the flow of unwanted moisture to the outside (see figure 21) See figure 18. If flashing was used instead of the sloping mortar base, caulk the flashing where it meets the inside of the opening between the louverandtheunit.Thishelpspreventmoisturefromgettingundertheflashing and into the room.

Louver

NoCaulk

Unit Gasket

Wall Unit

1" (25mm)

Floor

Caulk(By Others)

Flashing(By Others)

Figure 18 - Typical Louver Installation with Flashing

Unit Gasket


Floor

WallUnitLouver

NoCaulk 1" (25mm)

Figure 17 - Typical Louver Installation with Sloping Sealed Cement Mortar Base

Table 3 - Recommended Wall Openings For Wall Louvers

Recommended Maximum Number of VentiMatic Wall Openings VentiMatic Shutters Shutter(s) B C For Wall Louvers Which Can Be Mounted Air Capacity On Standard Louver Maximum Length Height 24" Shutter 36" Shutter cfm L/s 24" 27" 245⁄8" 107⁄8" (610) (659) (613) (267) 1 0 500 236

36" 39" 365⁄8" 107⁄8" (914) (991) (918) (267) 0 1 750 354 48" 51" 485⁄8" 107⁄8" (1219) (1295) (1222) (267) 2 0 1000 472

60" 63" 605⁄8" 107⁄8" (1524) (1600) (1527) (267) 1 1 1250 590

72" 75" 725⁄8" 197⁄8" (1829) (1905) (1832) (495) 0 2 1500 708

CAUTION

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Notes:1. Horizontal blade wall louver shown. Vertical blade wall louver also

available with Ventimatic shutter.2. Optional exterior grille matches unit ventilator wall louver in material

and design. Mounted on wall louvers.3. Optional steel interior wall grille should be used to conceal the interior

wall opening whenever the Ventimatic shutter is not located behind shelf cabinets or DraftStop enclosure. Hardware to mount the interior wall grille is not included.

Installing the VentiMatic Shutter AssemblyTheVentiMatic ShutterAssembly is mounted on an installed walllouver. For larger units with 100% ventilation air dampers, twoVentiMaticShuttersmaybemountedsidebysideonthesamelouver.See figure 24.

Thesizeandappearanceofthewalllouverswithorwithoutoptionalgrillesusedwiththeunitventilator,andtheVentiMaticShutter,areidentical.

WheninstallingVentiMaticShutter(s)onthewalllouver,makesureall moving parts are free to operate unobstructed and placed levelandplumbforproperoperation.Ifoptionalsteelinteriorwallgrilleisfurnished,installasshowninFigure22.

Figure 19 - Suggested method for fastening louver (without flange) inside wall opening .

Figure 22 - Louver , VentiMatic Shutter, Interior Wall Grille Details, Dimensions

As DirectedBy Architect

3⁄4" (19mm) Approx.

7"(178mm)

Cement Mortar

Steel Interior Wall Grille(Optional) See Note 3

125⁄8" (314mm)

3⁄4" (19mm) Approx.

BirdScreen

Do Not Block Drain Holes With Caulk or Mortar

NotLess

Than 9"(229mm)

Cement Mortar

C(see table 3, page 7)

Wall Opening

Louver (Bird Screen Not Shown)

Angle Iron(by others)

Room Side

Exterior

Caulk (top and 2 Sides)

Louvers

Drain Holes (Do Not Block)

Flange (4 Sides)

1" Minimum

Lintels (By Others)

Bird ScreenSealed Cement Mortar Pitched Away from Unit Toward Louver

Figure 20 - Vertical or Horizontal Blade Wall Intake Louver (Flanged) (Vertical Blade Shown)

Drain Holes (Do Not Block With Mortar or Caulking Materials

Bird Screen

Sealed Cement Mortar Pitched Away from Unit Toward Louver

1" Minimum

Figure 21 - Vertical or Horizontal Blade Wall Intake Louver (Recessed Without Flange) (Horizontal Blade Shown)

Lintels (By Others)

Louvers Aluminum Wall Louver Assembly With Bird Screen (See Note 1)

B(see table 3,

page 7)

SteelVentiMatic Shutter Assembly

41⁄8" (105mm)

237⁄8" (606mm)or

357⁄8" (911mm)

2" (51mm)

103⁄8" (264mm)

3" (76mm)

Decorative Exterior Grille Also Available (See Note 2, above)(Bird Screen not shown)

Figure 23 - Single VentiMatic Shutter & Wall Louver

Outside

▲

IM 817-2 Page 9 of 58

8"(203mm)

14"(356mm)

21"(533mm)

5"(127 mm)

5" (127 mm)

2-7/16"(62 mm)

7-1/4" (184 mm)

13"(330mm)

6-1/2"(165mm)

7" (178 mm)

1" (25 mm)

Before Setting the Unit in PlaceMovetheunitventilatortothecorrectlocation.SeeTable2,page3forapproximateshippingweights.Carefullyremoveunitventilatorfromwoodskid.Besuretoproperlydispose of the skid in accordance with local recycling rules andguidelines.

Removing Unit from the Skid Remove fasteners at each end which hold the unit to the skid andcarefullyslidethefrontoftheunitofftheskid(1).Tipunitforwarduntil the bottom of the slotted front kickplate is resting on the floor (2). Liftrearofunitoffoftheskidbytippingunitforwardwhilesupportingtheunitfromthefront,untilitispossibletoslideskidoutfromunderthe unit. GENTLY LOWER the rear of the unit to the floor (3).

Figure 26 - Front View with End Panels - Mounting Holes Locations

Mounting Holes

Figure 27 - Rear View without End Panels and Subbase - Piping and Electrical Knockout Locations and Dimensions

Knockout Opening Between Pipe Tunnel & End Compartment.

Rear Entry Area or Draftstop Opening Knockouts

Outdoor Air Intake Opening

End compartment Draftstop knockouts must be removed for proper Draftstop operation. (21-7/8" units only)

Size S07 = 48" (1219mm)Size S10 = 60" (1524mm)Size S13 = 72" (1828mm)Size S15 = 84" (2133mm)

Note:See Draftstop IM bulletin (IM 473) for suggested installation procedure.

Leakage of outdoor air wastes energy, causes drafts and erratic unit ventilator operation. Check the following details: At the correct unit ventilator location, examine the wall surface. Make sure that it is smooth, plumb, and perpendicular to the floor. The seals on the rear of the unit ventilator will take up the small irregularities found in normal masonry construction. If the wall is irregular or has mullions, install furring strips to provide a flush surface against which the unit ventilator can seal. If there are moldings on the floor/wall line, omit them behind the unit ventilator. Provide a sealing surface at the floor line. Install a seal pad under the unit to prevent air leakage. Install the unit ventilator against a wall made of non-combustible material, and on a floor made of non-combustible material. Floor must be level, unbroken and structurally strong to support the unit.

Aluminum Wall Louver Assembly with Bird Screen

(See Note 1) 3'' (76mm)

VentiMaticShutter Assembly

Center Cover103⁄8"(264mm)

Figure 24 - Two VentiMatic Shutters & Wall Louver

B(see table 3,

page 7)

Outside

Decorative Exterior Grille Also Available (See Note 2, page 8)(Bird Screen not shown)

Figure 25 - Removing Unit from Skid1. Carefully slide the front of the unit off the front of the skid.

2. While supporting unit from the front, slowly tip unit forward until bottom of kickplate is resting on floor. Lift skid slightly and GENTLY lower the rear of the unit to the floor while pulling skid back (DO NOT LET THE UNIT DROP).

Tip forward until kick-plate rests on floor

Kickplate

Approx. 10"

Mounting Holes, Piping and Electrical Knockout Locations & Dimensions

CAUTION

NOTICE

of 58 IM 817-2

ProcedureIftheunithasacoolingcoil,checkthecondensatedrainpantobesureitslopesdowntowardthedrainstub-upend.Todoso,comparetherightandlefthanddrainpanendstoFigures30&31.Theendwiththeshallowlowerbracket(Figure30)isthelowendofthedrainpan.Toreversetheslopeofthedrainpandothefollowing:

1. Removethelowerbracketandupperplatefromeachendoftheunit, as shown in figures 30 and 31. This is done by removing the screwsineachwitha1/4inchnutdriver.

2. Reinstallthebracketsontheoppositeendoftheunit.

3. Verify thestandarddrainconnection isopenon the low(drain)endonly.Ifthedrainconnectionstub-outsatthehighendofthedrainpanareopen,sealthemwatertightwithsiliconesealerorsimilar.

4. Mountstaticequalizercovertolowendbracketofdrainpan.

Figure 28 - Condensate Drain Pan Connection Location

Left Hand Right Hand

7/8"(22 mm)O.D. Drain

7/8"(22 mm)O.D. DrainCondensate

Drain

11"(279 mm)

11"(279 mm)

Front V iew of End Compartment(Without End Panels)

4-3/4"(121 mm)


Figure 30 - Low End of Drain Pan (Drain End)

Overflow ConnectionStandard Drain Connection

1/4" hex head screws

Disconnect all electrical power before servicing unit to prevent injury or death due to electrical shock.

The drain pan has two (2) connections on each end; a standard drain connection and an overflow connection.

Reversing Drain Pan Slope

Figure 31 - High End of Drain Pan

Shallow Upper Plate

Deep Lower Bracket

Drain Pan

Overflow Connection Standard Drain Connection

1/4" hex head screws

To Clean the Drain Pan1. Remove the shallow and deep upper plates from the unit (see figures

29and30).2. Spraywaterintothedrainpanonthehighendtowashdebristo

thelowend(drainend).3. Remove any debris, making sure that the drain holes are not

obstructed.4. Wipethedrainpanwithacloth.5. Reinstalltheupperplates.

Deep Upper Plate

Shallow Lower Bracket

DANGER

CAUTION

NOTICE

Deep Upper Bracket

Static EqualizerCover

Coil Connections

Drain Pan

ShallowLowerBracket

Figure 29 - Mount Static Equalizer Cover

IM 817-2 Page 11 of 58

Figure 32 – Typical Classroom Unit Ventilator Installation And Louver Details (see installation section for typical warnings and cautions)

Figure 33 – Typical VentiMatic Shutter Assembly Installation (see installation section for typical warnings and cautions)

Unit GasketPipe Tunnel

Screws or Bolts (by others)

Weep Holes

Caulk Top And Two Sides Of Louver

Sealed Mortar Bed

Caulk

Weep Holes

Floor

Unit Insulating Blanket

Back Of Unit

Unit Bottom Gasket

Seal Under Unit

Bird Screen

Internal Column For Wall Bracing (By Others)

Unit Gasket

Louver

Unit Ventilator Out-door Air Opening

Outside

Roomside

Typical VentiMatic louver installation with shelving.

Outside

Roomside

VentiMatic Shutter Assembly

Building Wall

Typical Floor Unit Installation

Typical VentiMatic™ Shutter and Draftstop™ Installation

1" End Panel w/Cut Out

Lintel (by others)

Unit Outside Air Opening

of 58 IM 817-2

Meeting IBC Seismic RequirementsAAF-HermanNelson unit ventilators can be specified, as follows, to meetInternationalBuildingCodeseismicrequirements:

• All components included in theseunit ventilators aredesigned,manufactured and independently tested, rated and certified to meet the seismic compliance standards of the International BuildingCode.

• Components designated for use in systems that are life safety,toxic, high hazard, combustible or flammable meet the on line, anchorage and load path requirements for life safety as defined in IBCsections1621.1.6,1621.3.3,1707.7.2.andIBCCommentary,VolumeII,section1621.1.6,IBCnotespertainingtothereleaseofhazardousmaterial.

• Allcomponentsusedaspartofasystemotherthantheabovemeetasaminimum,allloadpathandanchoragestandardsforcomponentsasoutlinedinIBCsection1621.3.3&1707.7.2.

• All completed component assemblies are clearly labeled for field inspection.SeismicComplianceLabelsincludethemanufacturer’sidentification, designation of certified models, definitive information describing the product’s compliance characteristics, and theIndependent Certifying Agency’s name and report identification.

In addition to all seismic requirements for IBC Certification listed elsewhere in the project specification, submittals for these units include:

1. A Certificate of Compliance from the Independent Certifying Agency clearly indicating that components supplied on thisproject are included in the component manufacturer’s Certificate ofCompliance.

2. Clearinstallationinstructionsincludingallaccessorycomponentsthatarepartoftheoverallcomponentinstallation.

(4) - 3/8" diam. x (dimension “Y”) galvanizedthreaded rod (by others) - align with unitmounting holes, and set into building structuremortar or structural support column (see detail).

(4) - 1-1/2" O.D. x (dimension “X”),galvanized steel pipe (by others),gives rigidity to the unit in relationwith the building structure (see detail).

(4) - 3/8" galvanized nut withwasher (by others), attach frominside unit end compartments.Tighten nut until steel pipe iscompressed between unit andbuilding structure or column.

Lintel(by others)

Building structure or support column

Gasket on back of unit

Top mounting holeon unit frame

1-1/2" O.D.galvanizesteel pipe

Y

X

NOTE: Dimensions “X” and “Y” to be determined by installingcontractor based on fit up requirements of job.* A Molly or Toggle bolt may be necessary if voids in the building

structure or support columns are present.

*

DETAIL

Figure 34 - Typical IBC Seismic Installation

IM 817-2 Page 13 of 58

Make Piping Connections

Be sure the hot and chilled water supply and return system are thoroughly flushed and cleaned before connecting piping to the unit ventilator. Debris in the lines can damage the unit.

For All SystemsBesure to install thecontrolvalve(s)onthecorrectunitventilator.Indiscriminate mixing of valves in the field can result in valves improperly sized for the desired flow rate, which can result in poor operationandcoilfreezeups.Installcontrolvalvesothereisatleast2"(51mm)minimumclearancetoremovetheactuatorfromthevalvebody.Becertainthatthecontrolvalveisinstalledcorrectly,withitsorientationvertical.Valvesshouldbeinstalledatleast5ooffcenter.

Be certain that the control valves are installed with the proper port orientation to provide proper flow and fail safe operation. Incorrect installation can result in improper unit operation, and/or the possibility of coil freeze-up.

With future servicing considerations in mind, use standard, field-supplied shutoffvalvesandunionconnections;thispermitseasyremovalofthecoilorcontrolvalveifservicingisrequired.

While brazing, have an extinguisher readily available. Wear appropriate eye and hand protection. Ensure all areas with shared ventilation have ample fresh air ventilation.

Properventilationisrequiredforbrazing.Whenbrazing,besuretoprotectunitventilatorcomponentsfromoverheatingdamage(meltinginsulation,alsodamagetovalves,wiring,electronics,sensors,etc.).Before filling, be sure to flush all piping adequately so that all debris isremoved.Debriscanpreventpropervalveoperation,resultinginoverheating,overcooling,etc.Ensureproperinsulationofsupplyandreturnpiping.Properinsulationpreventslossofunitventilatorcapacity,overheatingofendcompartment,and/ormoisturedripping.Thepipingtoandfromtheunitmustbeprotectedfromoutsideairandfreezeconditions.Thepipingmustbesuitablyinsulatedforcondensationorheatloseorgain.Penetrationsenteringtheunitendcompartmentsmust be fitted/sealed for unit integrity.

Refer to figure 32 and figures 26 and 27 and attach the unit ventilator to the wall through the four (4) mounting holes provided, using field-suppliedfastenersappropriatetothewallconstructionandthewashersprovided in the brown envelope with these instructions (figure 37). Envelopealsocontainsallenwrenchtoprovideaccesstounit.Pushtheunitventilatortighttothewallstructuresothattheoutdoorairsealsarecompressed.Securethewallfastenerstopreventtheunitventilatorfrommovingandtippingover.

Remove moldings behind unit

Unit must be anchored to an internal wall column or other suitable support (see figure 32, page 11)

Figure 36 - Setting The Unit Ventilator In Place

Figure 35 - Leveling Legs Location

Figure 37 - Shipping Envelope Contents.Unit Ventilator InstallationBefore setting the unit ventilator in position, be sure that field-supplied electrical connections are in place, de-energized and in accordancewiththeplans.Movetheunitventilatorintopositionagainstthewallsurface.Checktoseethattheunitventilatorislevelfromendtoendandbacktofront.Usinga4'levelisrecommended.Levelingboltsarelocatedateachend of the front kickplate (see figure 35).

CAUTION

CAUTION

WARNING

CAUTION

of 58 IM 817-2

For Water SystemsAfter flushing piping adequately, so all debris is removed, fill the system.

Atinitialoperation,ventmanuallybyunscrewingtheventplugoneortwo turns, figure 41. After venting, tighten the vent plug firmly.

Water system under pressure. Keep face and body parts well away from vent.Unscrew the vent plug only one or two complete turns, and vent slowly. Water pressure can result in severe personal injury.

Use piping shut off valves and connection unions for future servicing to the coil supply and return stubs, instead of hard piping. This permits easy removal of the coil or control valve if servicing is required.

Figure 41 - Vent and Drain Plug

Unscrew the vent plug one or two turns to manually vent system.

Figure 38 - Hot Water Coil Connections

Chilled Water Coil

Hot Water Coil

Chilled Water Return

Chilled Water Supply

Hot Water Return

Hot Water Supply

Water Coil ConnectionsHookupwaterpipinginaccordancewithFigure38and39forhotwaterandchilledwatercoilconnections.

Figure 39- Chilled Water Coil Connections

Failure to install water piping to coils properly can result in improper unit operation and coil freeze-ups.

Figure 40 - Protect Components From Overheating Before Brazing

Use A Quenching Cloth When Brazing, to Prevent Overheating The Piping Components (Avoid Valve D a m a g e a n d E r r a t i c Operation)

Vent

Drain Plug

2-pipe Chilled Water/Hot Water SystemsAftermakingthepipingconnections,securelyattachandinsulatethewater-in temperature sensor (S5) to thewatercoil supply line.Thesensorshouldbe locatedon thewatersupply line inanareawherethere is continuous water flow. The sensor hangs loose in the same endcompartmentasthecoilconnections.Thissensormustbeattachedcorrectlyforproperunitoperation.

After BrazingInstall provided donut shaped insulation seals around pipe fittings, by removingwhitebacking.Presssealsuptocoilpartitiontosealgapsinpartitioninsulation.

Donut insulation seals must be installed for proper air flow through the coil.

Consider addingpiping unionsfor future servicing(by others)

Consider addingpiping unionsfor future servicing(by others)

Air Flow

Air Flow

CAUTION

NOTICE

CAUTION

WARNING

IM 817-2 Page 15 of 58

R

S

J

A

B B

8-1/2"(216mm)

13-3/4"(349mm)

J

A

13-3/4"(349mm)

8-1/2"(216mm)

Air Flow Air Flow

R

S

R

S

16-1/8"(410mm)

11"(279mm)

Air Flow

R

S

16-1/8"(410mm)

J

11"(279mm)

K

H

Air Flow

J

K

H

R

S

J

A

B B

8-1/2"(216mm)

13-3/4"(349mm)

J

A

13-3/4"(349mm)

8-1/2"(216mm)

Air Flow Air Flow

R

S

78 = Opposite End Drain Low Capacity Steam Coil79 = Opposite End Drain High Capacity Steam Coil12 = Low Electric Heat Coil13 = High Electric Heat Coil

Heating Coils00 = None

Cooling CoilsV = 2-Row CW CoilS = 3-Row CW CoilW = 4-Row CW CoilG = Direct Expansion CoilY = 5-Row CW Coil

Heating OnlyFigure 42 - Hot Water Heating Only Unit (Coils 65, 66, 67)

Cooling Only

Unit Series S07 S10 S13 S15 Suction Line O.D. (in/mm) 3⁄4 19 3⁄4 19 7⁄8 22 7⁄8 22 Liquid LIne O.D. (in/mm) 1⁄4 6.35 1⁄4 6 3⁄8 10 3⁄8 10

Notes:1. All coils have same end supply and return connections.2. Steam coils have a factory installed pressure equalizing valve and

a 24" (610mm) long pressure equalizing line which terminates in a 1⁄2" M.P.T. fitting.

3. Steam/hot water connections may be same end as cooling coil connections, but they are recommended to be opposite end to facilitate piping. (Must be opposite end when using AAF controls.)

4. Cooling condensate drain pan is shipped sloped down towards the cooling coil connections but is field reversible.

5. Electric heating coil power connections are right end only. Junction box has 1"(25mm) and 2" (51mm) (trade size) knockouts, 101⁄2" (267mm) from right end of the unit.

6. For limitations with coil combinations see tables 4, 5, 8 and 9.7. Coil stubs are 7⁄8" I.D. (female) and terminate 9" (229mm) from the

end of the unit.8. Steam coils are 11⁄8" female (sweat) connections and terminate

9” (229mm) from the end of the unit.9. DX coils (G) have O.D. sweat connections. Interconnecting tube

by others. See table 7 for correct tubing size.

Table 6 - Dimensions

Table 7 - DX Coil (G) Connection Tubing

L.H. Connections

Electric Heating Only

S = Supply R = Return

R.H. Connections L.H. Connections R.H. Connections R.H. Connections

Table 4 - Heating Only – Coil Position/Combinations In Air Stream (one coil per position) Note: X indicates Available. Face and Bypass Valve First Position in Air Stream Second Position in Air Stream AVS AVV AVV Elect.. 65 66 67 68 69 78 79 Z X X 12 13 Z X

Heating Coils65 = 1-Row Hot Water Coil66 = 2-Row Hot Water Coil67 = 3-Row Hot Water Coil68 = Low Capacity Steam Coil69 = High Capacity Steam Coil

Cooling CoilsZ = None

Table 5 - Cooling Only – Coil Position/Combinations In Air Stream (one coil per position) Note: X indicates Available. Face and Bypass Valve First Position in Air Stream Second Position in Air Stream AVS AVV Y V S W 00 X X G 00 X

L.H. Connections

Figure 45 - Chilled Water Only Unit (Coils S, W, V) Figure 46 - Direct Expansion Cooling Only Unit (Coil G)

R.H. Connections L.H. Connections R.H. Connections

Note: For opposite end drain steam coils (code 78,79) Return (R) is 71⁄4"(184mm) from bottom of unit and H - 2"(51mm) from back of unit.

Figure 43 - Steam Heating Only Unit (Coils 68, 69, 78, 79)

Figure 44- Electric Heating Only Unit (Coils 12, 13)

Coil Headers, Locations


J

Air Flow

14"(356mm)

L

Junction Box

Unit Dimensions Depth A B C D E F G H I J K in 165⁄8 33⁄4 121⁄4 47⁄8 73⁄4 15⁄8 101⁄8 23⁄4 27⁄8 55/8 3 5

mm 422 95 311 124 198 41 257 70 73 143 76 127 in 217⁄8 9 171⁄2 101⁄8 13 67⁄8 153⁄8 8 81⁄8 107⁄8 81⁄4 101⁄4 mm 556 229 445 257 330 175 391 203 206 276 210 260


LL

SL

J

D

C

7-1/4"(184mm)

Air Flow

11-3/4"(299mm)

LL

SL

J

B

Air Flow

13-3/4"(349mm)

11-3/4"(299mm)

D

of 58 IM 817-2

Face and Bypass Valve First Position in Air Stream Second Position in Air Stream AVS AVS Elect.. AVV AVV Elect.. F U D E 00 X X 65 66 67 V S X X 65 66 W X X 65 66 67 G X X G 12 13 X V S W 12 13 X V S W 12 X G V S 68 69 78 79 X X 65 Y X X

Heating Coils65 = 1-Row Hot Water Coil66 = 2-Row Hot Water Coil67 = 3-Row Hot Water Coil68 = Low Capacity Steam Coil69 = High Capacity Steam Coil78 = Opposite End Drain Low Capacity Steam Coil79 = Opposite End Drain High Capacity Steam Coil12 = Low Electric Heat Coil13 = High Electric Heat Coil00 = None

R

S 13-3/4"(350mm)

A

B

J8-1/2"

(216mm)

Air Flow

14"(356mm)

L

Junction Box

Chilled Water and Heating Coils

See Notes and Tables 6 and 7 on page 15

Table 8 - Heat/Cool Position/Combinations In Air Stream (one coil per position) Note: X indicates Available.

Cooling CoilsU = 2-Row CW/HW 2-Pipe CoilD = 3-Row CW/HW 2-Pipe CoilE = 4-Row CW/HW 2-Pipe CoilF = 5-Row CW/HW 2-Pipe CoilV = 2-Row CW CoilS = 3-Row CW CoilW = 4-Row CW CoilY = 5-Row CW CoilG = Direct Expansion CoilY = 5-Row CW Coil

Left Hand

Figure 47 - Chilled/Hot Water (2-pipe) Unit (Coils D, E, U)

Figure 48 - Chilled Water and Hot Water Unit(Cooling Coils S, W, V) (Heating Coils 65, 66, 67)

Figure 49 - Chilled Water and Steam Unit(Cooling Coils S, V) (Heating Coils 68, 69, 78, 79)

Figure 50 - Direct Expansion (G) and Hot Water Unit(Cooling Coil G) (Heating Coils 65, 66, 67) (Not Reheat)

Figure 51 - Direct Expansion (G) and Steam Unit(Cooling Coil G) (Heating Coils 68, 69, 78, 79)

Figure 52 - Direct Expansion and Electric Heating(Cooling Coils G) (Heating Coils 12, 13)

Right Hand

Right Hand

(Cooling) Left Hand (Heating) Right Hand

Figure 53 - Chilled Water (1st Position) and Electric Heating(Cooling Coils V, S, W) (Heating Coils 12,13)

Right Hand

Note: For opposite end drain steam coils (code 78,79) Return (R) is 71⁄4" (184mm) from bottom of unit and H - 2" (51mm) from back of unit. (see table 6 for dimensions)


Direct Expansion Coils and Heating Coils (See Table 7 for Direct Expansion (DX) Coil)

(Cooling) Left Hand (Heating) Right Hand

(Cooling) Left Hand (Heating) Right Hand (Cooling) Left Hand (Heating) Right Hand

R

S

J

A

B B

8-1/2"(216mm)

13-3/4"(349mm)

J

A

13-3/4"(349mm)

8-1/2"(216mm)

Air Flow Air Flow

R

S R

S13-3/4"

(350mm)

A

B

J8-1/2"

(216mm)

R

S 16-1/8"(410mm)

E

F

J

11"(279mm)

Air FlowAir Flow

R

S 13-3/4"(350mm)

J8-1/2"

(216mm)

R

S

16-1/8"(410mm)

A

B

J

11"(279mm)

K

H

Air FlowAir Flow

LL

SL 14-1/4"(368mm)

J

9-3/4"(248mm)

R

S

8-1/2"(216mm)

Air Flow

13-3/4"(349mm)

LL

SL

14-1/4"(368mm)

J

B

R

S

A

Air Flow

16-1/8"(410mm)

I

8-1/2"(216mm)

B

F

A

G13-3/4"

(349mm)

I

LL

SL

14-1/4"(368mm)

J

10-1/8"(257mm)

D

C

R

S

H

K

7-1/4"(184mm)

Air Flow

11-3/4"(299mm)

LL

SL

14-1/4"(368mm)

J

B

R

S

H

K

10-1/8"(257mm)

Air Flow

13-3/4"(349mm)

11-3/4"(299mm)

D

14"(356mm)

L

Junction Box

LL

SL

J

D

C

7-1/4"(184mm)

Air Flow

11-3/4"(299mm)




IM 817-2 Page 17 of 58

LL

SL

J

C

7-1/4"(184mm)

Air Flow

LL

SL

J

B

Air Flow

13-3/4"(349mm)

11-3/4"(299mm)

D

R

S

16-1/8"(410mm)

11"(279mm)

K

H

LL

SL

J

C

7-1/4"(184mm)

Air Flow

LL

SL

J

B

Air Flow

13-3/4"(349mm)

11-3/4"(299mm)

D

R

S

16-1/8"(410mm)

E

F

11"(279mm)

R

S 13-3/4"(350mm)

J8-1/2"

(216mm)

R

S

16-1/8"(410mm)

A

B

J

11"(279mm)

K

H

Air FlowAir Flow

13-3/4"(350mm)

A

B

8-1/2"(216mm)

R

S

J

Air Flow

R

S

J

16-1/8"(410mm)

E

F

11"(279mm)

Air Flow

Face and Bypass Valve First Position in Air Stream Second Position in Air Stream AVB AVR AVR Elect.. V S 65 66 67 68 69 78 79 X X W 65 66 X X G 65 66 67 68 69 78 79 X G 12 13 X V S W 12 13 X Y 65 X X

Reheat

Table 9 - Reheat Coil Position/Combinations In Air Stream (one coil per position) Note: X indicates Available.

Heating Coils65 = 1-Row Hot Water Coil66 = 2-Row Hot Water Coil67 = 3-Row Hot Water Coil68 = Low Capacity Steam Coil69 = High Capacity Steam Coil78 = Opposite End Drain Low

Capacity Steam Coil79 = Opposite End Drain High

Capacity Steam Coil12 = Low Electric Heat Coil13 = High Electric Heat Coil

Cooling CoilsV = 2-Row CW CoilS = 3-Row CW CoilW = 4-Row CW CoilY = 5-Row CoilG = Direct Expansion Coil

Figure 57 - Direct Expansion (G) and Hot Water Unit (Cooling Coil G) (Heating Coils 65, 66, 67)

Figure 58 - Direct Expansion (G) and Steam Unit (Cooling Coil G) (Heating Coils 68, 69, 78, 79)

Figure 54 - Chilled Water and Hot Water Unit(Cooling Coils S, W, V) (Heating Coils 65, 66, 67)

Figure 55 - Chilled Water and Steam Unit(Cooling Coils S, V) (Heating Coils 68, 69, 78, 79)

Figure 56- Chilled Water and Electric Heating (Cooling Coils V, S, W)(Heating Coils 12, 13)

Figure 59 - Direct Expansion and Electric Heating (Cooling Coils G) (Heating Coils 12, 13)


S = SupplyR = ReturnLL = Liquid LineSL = Suction Line

Right Hand

Right Hand

Note: For opposite end drain steam coils (code 78,79) Return (R) is 71⁄4˝ (184mm) from bottom of unit and H - 2˝ (73mm) from back of unit.



S = SupplyR = ReturnLL = Liquid LineSL = Suction Line



R

S 13-3/4"(350mm)

A

B

J8-1/2"

(216mm)

Air Flow

14"(356mm)

L

Junction Box

14"(356mm)

L

Junction Box

LL

SL

J

D

C

7-1/4"(184mm)

Air Flow

11-3/4"(299mm)

of 58 IM 817-2

Typical Valve PackagesTheoptionalfactory-suppliedAAF®-HermanNelson®ControlValve(s)forwaterapplicationscanbeeither2-wayor3-waytype,andis/areshippedseparatefromtheunitventilatoritselftohelpavoidshippingdamagetothepipingoftheconnectionstubfromtheweightofthevalve, and to provide the installer with maximum flexibility in making the field piping connection. Before proceeding, see figures 60 through 84 as applicable, as well as the job-specific piping drawings. Notes:1. See label furnished on 2-way valve to determine direction of flow

through the valve.

2. Adhere to the port orientation shown for the 3-way valve.

3. For hot water applications and chilled water/hot water (2-pipe) applications, the 2-way valve furnished is normally piped open to the coil; the 3-way valve is piped normally open to the coil.

4. For chilled water applications, the 2-way valve furnished is normally piped closed to the coil; the 3-way valve is piped normally closed to the coil.

5. The 3-way valve is generally selected for diverting water back to the return main, where a constant pump head pressure is required.

6. All water coil stubs are 7/8" I.D. female sweat. Coil connections terminate 9" (229mm) from the end of the unit. Hot water connections may be same end as cooling coil connections, but are recommended to be at opposite ends from each other. When using MicroTech II controls, they must be at opposite ends.

Face and Bypass – MicroTech II™ 2-Way and 3-Way End-of-Cycle Valves

Control 2 Position Electrical 24 VAC, 50/60 Hz Stroke Power Stroke 9 to 11 seconds Spring return 4 to 5 seconds Ambient 32oF to 125oF (0oC to 52oC)

Connections 3⁄4" FNPT Static Pressure 300 psi (2100 kPa) Close-Off Pressure 13 psi (90 kPa) Temperature 32oF to 200oF (0oC to 93oC)

Connections 3⁄4" FNPT, 1" FNPT Static Pressure 300 psi (2100 kPa) Close-Off Pressure 13 psi and 15 psi (90 kPa and 103 kPa) Temperature 32oF to 200oF (0oC to 93oC)

Control 2 Position Electrical 24 VAC, 50/60 Hz Stroke Power Stroke 9 to 11 seconds Spring return 4 to 5 seconds Ambient 32oF to 125oF (0oC to 52oC)

Table 10 - 2-way Actuator

Table 11 - 2-way Valve Body

Table 12 - 3-way Actuator

Table 13 - 3-way Valve Body

Table 14 - EOC Connection

Figure 61 - 3-way End of Cycle Valve

Figure 60 - 2-way End of Cycle Valve

Connection Cv X Y Z

3⁄4"(19mm) FNPT 7.0 111⁄16" (43mm) 11⁄16" (23mm) 35⁄8" (92mm)

*1"(25mm) FNPT 7.0 17⁄8" (47mm) 1" (25mm) 311⁄16" (94mm)

* 1" valve for steam only

IM 817-2 Page 19 of 58

2-Way and 3-Way Modulating Valves – MicroTech II™

Control Floating Point Modulating Electrical 20 to 30 VAC at 50/60 Hz or 24 VDC ± 10% Transformer 12 VA (class 2 power source) Stroke 29/32 in. (23mm) max. 76 seconds Spring Return 4 to 9 seconds at room temperature (stem up) Operating Temperature 35 to 250oF (2 to 121oC); 15 psig (103 kPa) saturated steam

ThemodulatingcontrolvalvesforMicroTechIIaredesignedtoregulatethe flow of hot water, chilled water and steam. They consist of a bronze body valve with a spring return, floating point actuator. The optional valve accessory is shipped separate from the unit ventilator for field installation to prevent shipping damage and to provide flexibility in making the field piping connection.

Figure 62 - 2-Way and 3-Way Modulating Valve Actuators

Table 16. Valve Body Specifications 400 psig (2.756 ,PA) up to 150oF Water (66oC) decreasing to 365 psig Static (2,515 kPa) at 248oF (120oC)

Pressure 38 psig (262 kPa) Saturated steam at

Steam 284oF

Fluid Temperature

35 to 250oF (2 to 121oC); 15 psig (103kPa) saturated steam

Table 15. Actuator Specifications

2-WayModulatingValve 3-WayModulatingValve

Valve Size, in. (DN) A B C

N.O./N.C./Three Way 2-Way N.O. 2-Way N.C. Three-Way

1/2 (DN15) 3 13/16 1-9/16 1-3/16 8

(76) (21) (39) (46) (203)

3/4 (DN20) 3-7/32 15/16 1-5/8 2-1/8 8

(81) (24) (41) (54) (203) 1 4-1/8 1-5/32 1-3/4 2-9/16 9-7/32 (DN25) (119) (29) (44) (65) (234) 1-1/4 4-23/32 1-11/32 2 2-25/32 9-7/32 (DN32) (119) (34) (51) (70) (234)

2-Way Modulating Valve

3-Way Modulating Valve

Modulating Valve Specifications – MicroTech II™

Table 17. 2-Way and 3-Way Modulating Valve Dimensions

4-3/32"(104mm)

3-5/32"(80mm)

6-13/16"(173mm)

AB

C

3-19/32"(91mm)11/32"

(8mm)

4-3/32"(104mm)3-5/32"

(80mm)

6-13/16"(173mm)

AB

C

3-15/16"(100mm)11/32"

(8mm)

Figure 63

Figure 64

of 58 IM 817-2

ValveInletPressure Cv Connection 2psig 5psig 13.8kPa 34.5kPa CapacityRange(MBh) CapacityRange(kW) 0.73 1/2"(13mm)FNPT 11 14 18 22 3.2 4.0 5.2 6.3 1.8 1/2"(13mm)FNPT 27 34 44 53 7.8 9.9 12.9 15.6 4.6 1/2"(13mm)FNPT 68 86 112 136 20.1 25.2 32.9 39.9 7.3 3/4"(19mm)FNPT 109 137 178 216 31.8 40.0 52.2 63.3 11 1"(25mm)FNPT 164 206 269 325 48.0 60.3 78.7 95.4 18.5 11/4"(32mm)FNPT 275 346 452 547 80.7 101.4 132.4 160.4

Steam Modulating Valve Selection (MicroTech II™)Thesteammodulatingcontrolvalveisexpectedtovarythequantityofsteamthroughthecoil.Anymovementof thevalvestemshouldproduce some change in the steam flow rate. To select a modulating steamvalve:1. Obtainthesupplysteaminletpressure.2. Determinetheactualheatrequirementofthespacetobeheated.

3. Selectavalve(Cv)fromTable18,whichgivesthecapacityrangebasedona60%pressuredropatthelowendoftherangeand100%pressuredropatthehighendoftherange.Forexample:With2psig(13.8kPa)inletsteampressure,thevalvewithaCvof4.6,inthefullopenposition,wouldhavea1.2psig(8.3kPa)pressuredropat68MBh(20.1kW)anda2psigpressuredropat86MBh(25.2kW).Thevalveshouldhaveacapacitylessthanorequaltothespacetobeheated.

Table 18. Modulating 2-Way, Normally Open, Steam Valve – Pressure Drop

Hot Water and Chilled Water Modulating Valve Selection (MicroTech II)Theunitventilatorcontrolvalve is expected tobeable tovary thequantity of water that flows through the coil in a modulating fashion. Anymovementofthevalvestemshouldproducesomechangeintheamount of water that flows through the coil. Oversized control valves cannotdothis.Forexample,assumethatwhenthecontrolvalve isfullyopen,thepressuredropthroughthecoilistwiceasgreatasthedropthroughthevalve.Inthiscase,thecontrolvalvemusttraveltoapproximately 50% closed before it can begin to have any influence on the water flow through the coil. The control system, no matter how sophisticated,cannotovercomethis.Oversizedcontrolvalvescanalsoresult in “hunting” which will shorten the life of the valve and actuator andpossiblydamagethecoil.

TocorrectlyselecttheproperHotWaterorChilledWaterModulatingValve:1. Determine the flow of water and the corresponding pressure drop

throughthecoil.2.Obtainthepressuredifferencebetweenthesupplyandreturn

mains.3.Selectavalvesize(Cv)fromTable19onthebasisoftaking50%

of the available pressure difference (at design flow) between the supplyandreturnmainsatthevalvelocation.Thevalveshouldhaveapressuredropgreaterthanthatofthecoil.

4.Selectanormallyopenvalveforhotwater,or2-pipeCW/HWcoils.Forchilledwatercoilsselectanormallyclosedvalve.

Table 19. 2-Way and 3-Way Modulating Valve Pressure Drop (Hot Water and Chilled Water)

WaterFlowRatesGPM(L/s) Cv Connection Recommended Valve 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 FlowRates PressureDrop (.13) (.19) (.25) (.32) (.38) (.44) (.51) (.57) (.63) (.64) (.76) (.82) (.88) (.95) (1.01) (1.07) (1.13) (1.20) (1.26)

0.73 1/2" (13mm) 2 GPM to 3 GPM WPD Ft of H2O 17.3 38.8 – – – – – – – – – – – – – – – – –

(.13 L/s) to (.19 L/s) (kPa) (51.6) (116)

1.8 1/2" (13mm) 2 GPM to 7 GPM WPD Ft of H2O 2.8 6.4 11.4 17.7 25.6 34.8 – – – – – – – – – – – – –

(.13 L/s) to (.44 L/s) (kPa) (8.5) (19.1) (34.0) (53.1) (76.4) (104)

4.6 1/2" (13mm) 5 GPM to 16 GPM WPD Ft of H2O – – – 2.7 3.9 5.3 7.0 8.8 10.9 13.2 15.7 18.4 21.3 24.5 27.8 – – – –

(.32 L/s) to (1.0 L/s) (kPa) (8.1) (11.7) (15.9) (20.8) (26.3) (32.5) (39.3) (46.8) (54.9) (63.7) (73.1) (83.2)

7.3 3/4" (19mm) 9 GPM to 20 GPM WPD Ft of H2O – – – – – – – 3.5 4.3 5.2 6.2 7.3 8.5 9.7 11.0 12.5 14.0 15.6 17.3

(.57 L/s) to (1.3 L/s) (kPa) (10.5) (12.9) (15.6) (18.6) (21.8) (25.3) (29.0) (33.0) (37.3) (41.8) (46.6) (51.6)

Care must be taken with modulating valves to provide proper water flow. In freezing conditions, water flow must be maintained through the heating coil or a suitable freeze-prevention solution employed to prevent freeze-up. Similarly, the cooling coil must be drained or a suitable freeze-prevention solution employed.

Normally Open (Stem Up) – Push Stem Down to CloseNormally Closed (Stem Up)– Push Stem Down to Open

Note:The actuator spring returns the valve to the stem up position when the actuator is de-energized (off)

White/Brown (Stem Up)

Yellow (24 VAC Supply)

Brown (Stem Down)

White (Common)

Locating Rib

Figure 65 - Actuator Wiring

Note: The actuator plug-in wiring for the Steam Valve is the same as the Hot Water and Chilled Water Modulating Valve. (see figure 65 )

5.Selecteithera2-wayor3-waymodulatingvalve.The3-wayvalveisgenerallyselectedfordivertingwaterbacktothereturnmainwhereaconstantpumpheadpressureisrequired.

CAUTION

IM 817-2 Page 21 of 58

The2-wayEOCCWvalveisfurnishednormallyclosedtothecoil.When the valve is de-energized (off) there is no flow through the coil. Energizing the valve allows flow through the coil.

The3-wayEOCCWvalveisfurnishednormallyclosedtothecoil.Whenthe valve is de-energized (off) the flow bypasses the coil. Energizing the valve allows flow through the coil.

Figure 68 - 2-way EOC, Normally Closed, Chilled Water Valve Piping

Figure 69 - 3-way EOC, Normally Closed, Chilled Water Valve Piping

Return

Return

Balancing and Shutoff Valve

Shutoff Valve

Supply

Supply

2-way EOC Valve Unit Coil

Unions

A B

Return

Return

Supply

Unit Coil

Union

Shutoff Valve

Supply

3-way EOC Valve

Union

Bypass

A B

AB

Balancing Valve

Cooling – Chilled Water EOC Valve Piping


The2-wayEOChotwateror2-pipeCW/HWvalveisfurnishednormallyopen to the coil. When the valve is de-energized (off) there is full flow through the coil. Energizing the valve shuts off the water flow.

Figure 66 - 2-way EOC, Normally Open, Hot Water or 2-pipe CW/HW Valve Piping

The3-wayhotwateror2-pipeCW/HWvalveisfurnishednormallyopen to the coil. When the valve is de-energized (off) there is full flow throughthecoil.Energizingthevalveallowsthewatertobypassthecoil.

Figure 67 - 3-way EOC, Normally Open, Hot Water or 2-pipe CW/HW Valve Piping

Return

Return


Shutoff Valve

Supply

Supply

2-way EOC Valve Unit Coil

Unions

A B

Heating – Hot Water End of Cycle Valve Piping

S5 Sensor (2-pipe CW/HW Units Only)

Typical Piping ArrangementsHeatingvalveactuatorsshouldbemountedinanuprightpositionabovethecenterlineofthevalvebodyandshouldbepipednormallyopentothecoil.Modulatingvalveactuatorsforhotwaterapplicationsmaybepositionedabovethevalvebodyamaximumof75ofromthevertical.Forsteamapplicationsonly,mountthemodulatingvalveactuatorabovethevalvebodyat45o fromthevertical.Two-position,end-of-cycle(EOC)valvesusedwithfaceandbypassdampercontrolledunitsmaybepositionedabovethevalvebodyamaximumof85ofromthevertical.Allcontrolvalvesareshippedloosetohelpavoidshippingdamagetothepipingorthecoilconnectionstubfromtheweightofthevalve,andto provide the installing contractor with maximum flexibility in making the field piping connections. Refer to AAF®-HermanNelson®factoryinstructionsheetshippedwiththeunitforportorientationandapipingschematic.Controlvalvesmustbeinstalledontheunitsinwhichtheyareshipped.Indiscriminatemixingofvalvesamongunitscanresultin valves not properly sized for the desired flow rate. Control valves shouldbeinstalledsothatthereis2"minimumclearancetoremovetheactuatorfromthevalvebody.Asafutureserviceconsideration,provideunionsforremovaloftheunitcoiland/orthecontrolvalve.

Return

Return


Shutoff Valve

Supply

Supply

3-way EOC Valve

Unit Coil

Union

Balancing ValveBypass

AB

AB UnionS5 Sensor(2-pipe CW/HW Units Only)

For2-pipesystemsuse3-wayEndofCycleValve(EOC)sosupplywaterisrunningthroughthecircuit.TheS5sensorshouldbemountedonthesupplywaterpipe.

of 58 IM 817-2

Typical Water Coil Piping - EOC Valve PipingFigure 70 - Face and Bypass With 3-way End-of-Cycle Valve (Piping Within Unit End Compartment)

Figure 71 - Face and Bypass With 3-way End-of-Cycle Valve (Piping Outside Unit End Compartment)

2

3

4

567

8

15

1

S5 Sensor

S5 Sensor

Table 20 - Descriptions

Three-way End of Cycle control valve (AAF®-HermanNelson®)

Coil air vent (AAF-HermanNelson)

Coil drain (AAF-HermanNelson)

Shutoff valve (Others)

Balancing shutoff valve(s) (Others)

Supply

Return

Unions (Others)—Must disconnect below floor line

Two-way, End of Cycle two-position valve (AAF-HermanNelson)

Union: Half attached to coil, half attached to valve

Modulating control valve (AAF-HermanNelson)

All piping, fittings and unions by others (not AAF-HermanNelson) except as noted

Steam check valve and pressure equalizing line (AAF-HermanNelson)

Float and thermostatic steam trap (Others)

Supply and return coil connection and stub-up unions by others

2

1

3

6

4

5

7

8

15

14

13

12

11

10

9

Typical Piping Arrangements Steam – Typical Modulating Valve PipingTheoptionalfactorysuppliedAAF®-HermanNelson®MicroTechII™2-wayModulatingsteamvalveisfurnishednormallyopentothecoil.When the valve is de-energized (off) there is full flow through the coil. Energizing the valve reduces the steam flow in a modulating fashion.

Refer to the arrow on the modulating valve body to determine the direction of flow. If the valve is mounted improperly, the unit will not operate properly and damage to the valve may result.

Thevalveshouldbeinstalledsothatthereisa2"(51mm)minimumclearancetoremovetheactuatorformthevalvebody.Provideunionsfor removal of unit coil and/or control valve as a future serviceconsideration.

Steamconnectionsmaybesameendascoolingcoilconnections,butarerecommendedtobeoppositeendtofacilitatepiping.WhenusingMicroTech II controls, theymust beopposite end.Themodulatingvalve accessory must be field installed on the unit for which it was selected.

Return

Shutoff Valve

Shutoff Valve

Supply

Return

Supply

Unit Coil

Equalizing Line

Steam Trap

Figure 73 - Same End Connections – Model AV 68/69 Coils

Control Valve: Install On Center Coil Connection

Vacuum Breaker (by AAF-HermanNelson)

Vacuum Breaker Tube (by AAF-HermanNelson)

Steam Trap (by Others)

1⁄4" Flare by 1⁄2" MPT Half-Union and 1⁄4" Flare (by AAF-HermanNelson)

Tee (by Others)

Union

Figure 72 - Typical 2-Way Steam Modulating Valve Piping

21

3

45

15

6

1515

7

CAUTION

IM 817-2 Page 23 of 58

Typical Steam Coil PipingFigure 76 - Face and Bypass With 2-way End-of-Cycle Valve - Same End Drain Connection (Piping Within Unit End Compartment)

Figure 77 - Face and Bypass With 2-way End-of-Cycle Valve - Same End Drain Connection (Piping Outside Unit End Compartment)

13

14

4

67

15

9 15

15

Figure 74 - 2-Way Steam Modulating Valve Control - Same End Drain Connection (Piping Within Unit End Compartment)

14

4

8

6

7

13

15

11

In Steam Systems:The optional factory-supplied AAF®-HermanNelson® MicroTech

II™ Modulating Control Valveforsteamapplicationsisthe2-waytype. It is shippedseparately from theunitventilator tohelpavoidshipping damage, yet provide the installer with maximum flexibility in making the field piping connection. Before proceeding, see Figures 72 through 77, as well as the job-specific piping drawings.

For steam applications, the 2-way, angle pattern valve furnished isnormallypipedopentothecoil.Allsteamcoilsare1-1/8"(34mm)female sweat connections. Coil connections terminate 9" (229mm)fromtheendoftheunit.Steamcoilshaveafactory-installedpressureequalizingvalveanda24"(610mm)longpressureequalizinglinethatterminatesina1/2"M.P.T. fitting.Steamconnectionsmaybesameendascoolingcoilconnections,butarerecommendedtobeoppositeendtofacilitatepiping.WhenusingMicroTechIIcontrols,theymustbeoppositeend.

SeeFigures73through77.Connectthe1/4"(6.35mm)vacuumbreakertubetothedownstreamreturnline.Makethisconnectiondownstreamofthetrapoutlet.

Figure 75 - Opposite End Drain Connection – (78/79 Coils)

Left End View Right End View

Left Hand Steam Supply and Right Hand Steam Return (Shown)

1⁄4" Flare By 1⁄2" MPT Half-Union and 1⁄4" Flare (by AAF-HermanNelson)

Steam Trap (by Others)


Control Valve: Install On Center Coil Connection

Steam Supply

Steam Return

Drain Line (by AAF-HermanNelson)


Tee (by Others)

Vacuum Breaker (by AAF-HermanNelson)

See page 22 for number designation descriptions.



14

13

4

6

7

8

15

9

of 58 IM 817-2

Heating – Modulating Valve PipingHot Water (or 2-pipe CW/HW) Modulating Valve Piping

Return

Return


Shutoff Valve

Supply

Supply

2-way Modulating

Valve Unit Coil

Unions

2-way Modulating, Normally Open, Hot Water or 2-pipe CW/HW Valve Piping (typical)The2-wayModulatinghotwater(or2-pipeCW/HW)valveisfurnishednormallyopentothecoil.Whenthevalveisde-energized(off)thereis full flow through the coil. Energizing the valve reduces the volume of water flow in a modulating fashion.

3-way Modulating, Normally Open, HotWater or 2-pipe CW/HW Valve Piping (typical)The3-wayModulatinghotwater(or2-pipeCW/HW)valveisfurnishednormallyopentothecoil.Whenthevalveisde-energized(off)thereis full flow through the coil. Energizing the valve allows a varying amountofwatertobypassthecoil.

Return

Return


Shutoff Valve

Supply

Supply

3-way Modulating

Valve

Unit Coil

Union

Union

Balancing Valve

N.O.Common

N.C.

Whenpipingthemodulatingvalve,refertothearrowsonthemodulatingvalve body to determine the direction of flow. The valve should be installed so that there is a 2” (51mm) minimum clearance to remove the actuatorformthevalvebody.Provideunionsforremovalofunitcoiland/orcontrolvalveasafutureserviceconsideration.Hotwaterconnectionsmaybesameendascoolingcoilconnections,butarerecommendedtobeoppositeendtofacilitatepiping.WhenusingAAFMicroTechIIcontrols,theymustbeoppositeend.Themodulatingvalveaccessorymust be field installed on the unit for which it was selected.



Figure 80 - 3-way Modulating Valve Control (Piping Outside Unit End Compartment)

2

3

4

5

6

7

1515

15

11

S5 Sensor

Refer to the arrows on the modulating valve body to determine the direction of flow. If the valve is mounted improperly, the unit will not operate properly and damage to the valve may result.


Figure 78 - 2-way Modulating Valve Control, Normally Open, Hot Water or 2-pipe CW/HW Piping

Figure 79 - 3-way Modulating Valve Control

CAUTION

IM 817-2 Page 25 of 58

Cooling – Chilled Water Modulating Valve Piping2-way Modulating, Normally Closed, Chilled Water Valve Piping (typical)The 2-way Modulating chilled water valve is furnished normallyclosed to the coil. When the valve is de-energized (off) there is no flow through the coil. Energizing the valve allows flow through the coil in amodulatingfashion.

3-Way Modulating, Normally Closed, Chilled Water Valve Piping (typical)

The3-wayModulatingchilledwatervalveisfurnishednormallyclosedto the coil. When the valve is de-energized (off) the flow bypasses the coil. Energizing the valve allows flow through the coil in a modulating fashion.

Return

Return


Shutoff Valve

Supply

Supply

2-way Modu-latingValve Unit Coil

Unions

Return

Shutoff Valve

Supply

Supply

3-way Modulating

Valve

Union

Balancing Valve

N.C.

N.O.

Return

Unit Coil

Union

Common


Figure 84 - 3-way Modulating Valve Control (Piping Within Unit End Compartment)

112

3

45

67

8

15

S5 Sensor

Refer to the arrows on the modulating valve body to determine the direction of flow. If the valve is mounted improperly, the unit will not operate properly and damage to the valve may result.

Figure 82 - 2-way Modulating, Normally Closed Chilled Water Valve Piping (Piping Outside Unit End Compartment)


Figure 81 - 2-way Modulating Valve Control, Normally Closed, Chilled Water Piping

Figure 83 - 3-way Modulating Valve Control, Normally Closed, Chilled Water Piping

15

315

154

5

6

7

2

11

S5 Sensor


CAUTION

of 58 IM 817-2

Ensure refrigerant pressure taps are installed in piping end compartment for proper charging and setting of the TXV valve.

1-3/8" Left Endof unit(Less end panel)

Thermal Expansion Valve (TXV) Superheat Adjustment.

Return (Suction Line)

Bulb attached in the 2 or 10 o'clock position

Equalization Tube

Condensate Drain (Protect Drain Pan with a quenching cloth when brazing, to prevent damage).

Supply (Liquid Line)

Direct-Expansion (DX) R-22 PipingDX coils have O.D. sweat connections. Interconnecting tubing isfield-supplied. See Table 21, page 28 and job-specific drawings for correcttubingsizes.

Wrap TXV valve with a quenching cloth and remove bulb from suction line to avoid valve damage while brazing.

Condensate piping:AAF®-HermanNelson® cooling unit ventilators are designed forcondensateremovalintoacondensatedisposalsystem.Donotconnectthe unit drain connection so that condensate exits to the outsideand/orisexposedtofreezingtemperatures.Installer is responsible for any damage that might be caused from freezing condensate.Inapplicationswithanendcompartmentauxiliarydrainpan,seetheinstallationinstructionsshippedwiththeauxiliarydrainpanitself.

STOP! Before Brazing

Remove Bulb When BrazingTo Prevent Overheating Damage

Use A Quenching Cloth When Brazing, to Prevent Overheating The TXV Valve Body (Avoid Valve Damage and Erratic Operation)

Figure 86 - TXV Valve Piping Detail (Left Hand Shown)

Properventilationisrequiredforbrazing.Whenbrazing,besuretoprotectunitventilatorcomponentsfromoverheatingdamage(meltinginsulation,alsodamagetovalves,wiring,electronics,sensors,etc.).During brazing, bleed nitrogen through the piping. Using field-supplied material suitable for insulating refrigerant lines, wrap the thermalexpansionvalve (TXV)bulb and thepipingbetween theTXVandthepointwhere it enters thecoilwithat leastone thicknessof thematerial. Likewise, insulate the suction line. (See figures 87-90 for typicalpipingandwiring)Ensureproperinsulationofsupplyandreturnpiping.Properinsulationpreventslossofunitventilatorcapacity,overheatingofendcompartment,and/ormoisturedripping.

Piping Stub-up Within Cabinet

Unit End Compartment

Piping Stub-up Within 6" End Panel End Panel 6"Application and Dimension

Wall Line 1"

115⁄8"

10"Note: Space available in left end compartment for piping stub-up. Stub-up, including unions and shutoff valves, must disconnect below floor line for unit installation and removal.

Space available at left end of unit for piping stub-up when 6" end panel is used.

Left End of unit(Less end panel)

Wall Line

4"

1"

Unit End Compartment

6"

Figure 85 - Piping Stub-Up Details, 6" End Panel

Install Pressure Taps on Supply (Liquid Line) and Return (Suction Line) Piping (By Others).

6" End Panel

CAUTION

NOTICE

IM 817-2 Page 27 of 58

Figure 87 - Typical Piping and Wiring for Split System

2 Wires (+) Ground

To Open Sight Drain

TXV(Thermal Expansion Valve)

Filter Drier (Field Supplied)

Moisture Indicator Sight Glass (Field Supplied)

Weatherproof Fused Disconnect Per NEC

2 Wires (+) Ground

Insulated Suction Line

Fused Disconnect

Unit Ventilator Split Systems GuidelinesThefollowingprovidesbasicguidelinesthatwillprovidepropersystemcoolingandoperationofanR-22commercialDX/hotwatersystemforschoolapplications.DXsystemcomponentsmustbematchedandsizedcorrectly(notoversized)fortheload.

TheDXsystemmustincorporatethefollowing,providedbyothers,forproperoperation:• Size piping per ASHRAE Refrigeration Handbook (correct

refrigerant and compressor oil flow), see figure 88 and table 21.• Use clean sealed refrigerant grade piping (prevent system

contamination)• Install Liquid Line Filter Dryer (clean/dry system to prevent

damage of operating components), see figure 89.• InstallLiquidLineSightGlass(indicatesrefrigerantdrynessand

ifliquidinliquidline-do not use the sight glass to determine when refrigerant system is charged correctly), see figure 88.

• Installpressuretapsontheunitventilator'sliquidlineandsuctionlines for subcooling and superheat measurements at the unitventilator, see figures 88 and 89.

• InstallHighPressureSwitchatcondensingunitwiredincondensercontrolsystem(protectscompressorandrefrigerantsystemfromexcessivepressures-condenserfanfailureorovercharging),seefigure 90.

• Install Low Pressure Switch at condensing unit wired in thecondenser control system (low refrigerant pressure switchprotectsthesystemunderlowrefrigerantsuctionconditions),seefigure 90.

• InstallLowAmbientTemperatureSwitchatcondensingunitwiredin thecondensercontrolsystem(locksoutmechanicalcoolingbelow60oF-propersystemoperationandfreeeconomizerusage),see figure 90.

• IncorporateCompressorTimeDelay (5minute) incondensingunitcontrolsystem(reducesexcessivecompressorcycling),seefigure 90.

• Singlephasecompressors-considerhardstartkitstoovercomenon-equalizedpressureinrefrigerantlines.

• Incorporate Low Refrigerant Temperature Sensor (T4) incondensingunitcontrolsystem(T4protectsthesystemunderlowrefrigerant suction conditions) see figure 90.

• UVfansmustcontinuetorunuponLowRefrigerantTemperaturetripofT4(controlsbyothers)orS4(MicroTechII)(evaporatorair flow dissipates residual low coil surface temperatures - suction pressures raised, coil frosting reduced), see figure 90.

• UVfansmustcontinuetorunforsettimeperiodduringunoccupiedmodeaftersatisfactionofthespacesensor(dissipatesresiduallowevaporatorcoilsurfacetemperatures-reducingcoilfrosting),seefigure 90.

• LocktheFaceandBypassDamper(actuatorspringreturntofullfacewhende-energized)inthefullfacepositionduringmechanicalcooling(fullairthroughevaporatorcoilreduceslowrefrigerantsuctionconditions,potentialcoilfrosting)

• WhenBrazingbleedNitrogenthroughpiping(reducedoxidesandblockageinpiping/TXV)

• Use Heat Sink when brazing to prevent overheating theTXVvalvebodyandbulb(avoidvalvedamageanderraticoperation),see figure 86.

• Verify theTXV bulb securely attached at 2 or 10 o’clock for7/8"andsmallerdiametersuctionlinepiping(propersuctiongassensing and reduced hunting) See figure 86.

• InsulatetheTXVbulb(reactstorefrigeranttemperaturesandnotambient), see figure 88.

• Insulate the suction line piping (minimum heat pickup), see figure 88.• Evacuate and properly charge the refrigerant system, see figure 89.• Chargetosubcoolingatthecondensingunitperthecondensing

unit manufacturer’s instructions, typically 15oF to 16oF at theunit ventilator, subcooling at 95oF outdoor ambient (results incorrectrefrigerantdistributionatthecoiltopreventlowsuctiontemperatures)

• AdjustTXVforcorrectsuperheattoeliminate/minimizehunting,see figure 91.

• Set superheat to 5oF to 7oF at the UV coil suction line when95oF outdoor ambient (proper system superheat for optimumperformance).Allowsystemtosettlefor20to30minutestoreachstablesteadystateconditionsandthenrecheck/adjustsuperheatifnecessary,seetable23.

• Compensateboth subcooling and superheat for actual outdoorambientandindoorairtemperatures

• In windy areas, add wind baffles to condensing unit or build a parapet(eliminatewindeffectoncondensingunitcoilforproperTXV refrigerant flow at lower ambient)

• Forlowerambientconditionsinstallvariablespeedcondenserfanheadpressurecontroltomaintainheadpressuresbetween180psigand 280psig (for proper TXV refrigerant flow at lower ambient), see figure 90.

of 58 IM 817-2

Typical conditions - 95oF ambient, 75 psig suction, 285 psig head pressure, 6-7oF superheat, 15oF subcooling.

LiquidLineDrier

Hazardous Voltage!Disconnect all electric power including remote disconnects before servicing. Failure to disconnect power before servicing can cause severe personal injury or death.

Sight Glass

TXV (Thermal Expansion Valve)

Insulate Bulb, (Re-acts To Refrigerant Temperature and Not Ambient)Insulate The Suc-tion Line Piping, (Minimum Heat Pickup)

Return (Suction Line)

Supply (Liquid Line)

Figure 88 - Insulate Bulb and Suction Line Piping Figure 89 - Typical Split System Evacuation/Charging Setup

Suction Line Service ValveLiquid Line Service Valve

Outdoor Fan

Compressor

Gauge Bar Hoses

Vacuum Pump

TXVIndoor Fans

Charging Cylinder

Indoor Coil

Outdoor Coil

Low PressureGauge

Outdoor Condensing Unit

Unit Ventilator

High PressureGauge

Figure 90 - Typical Unit Ventilator/Condensing Unit Wiring Diagram

Compressor

CompressorContactor

Capacitor

HeadPressureController(Optional)

FanMotor

HighPressureSwitch

LowPressureSwitch

TDR = Time Delay Relay TB = Terminal Block

T4

23

1

Rec3

Line Voltage

Factory WiredField Wired (By Others)

TDR or TB

Low AmbientTemp. Switch

To controls by others, to energize condensing unit normallyopen contact.

T1 T2

L2L1

L2

L1

24V

24V

Checking System ChargeThesystemchargeshouldbecheckedunderdesignconditions[95oFoutsideair,80oF/67oF(DB/WB)indoorair].Refertocondensingunitmanufacturer'sguidelines.Beforeadjustingrefrigerantcharge,verifythattheunitventilatorisoperatingatnormaldesigncfm.Nominalcfmisdeterminedwithadrycoil,andcfmwillbereducedduringairconditioningoperationwithawetcoil.Filtersandcoilmustbecleanandfanspeedsetathigh.temperaturetoobtainsubcooling.

Determining SubcoolingTodeterminecorrectsubcooling:

1. Measureoutdoorambient.Itmustbebetween65oFand105oF.2. Measureliquidlinetemperature6inchesfromtheTXVinlet.3. MeasureliquidlinepressureneartheTXV.4. Determine saturated liquid temperature from saturated

temperature pressurechart(table22).5. Subtractmeasured liquid line temperaturefromsaturated liquid

temperaturetoobtainsubcooling.6. Adjustchargepercondensingunitmanufacturerrecommendation

toobtain15-16oFsubcooling.

(By Others)(By Others)

Note: Table 21 piping dimensions are for systems with up to 30 ft. (9.14 m) vertical separation and up to 100 ft (30.47 m) horizontal separation from the outdoor condensing unit.

Table 21 - Dimensions, DX Tubing inches (mm)

Models AVS, AVV, AVB, AVR Suction Line O.D. Liquid Line O.D. S07 3/4" (19mm) 1/4" (6mm)

S10 3/4" (19mm) 1/4" (6mm)

S13 7/8" (22mm) 3/8" (10mm)

S15 7/8" (22mm) 3/8" (10mm)

S20 7/8" (22mm) 3/8" (10mm)

Typical Condensing Unit

Typical Unit Ventilator Interface

PressureTaps(by others)

Pressure Taps (Field Installed)

Pressure Taps (Field Installed)

NOTICE

WARNING

IM 817-2 Page 29 of 58

Do not force adjustment stem of TXV. When adjusting superheat setting, there are a maximum of 10 turns on the stem. Turning adjustment stem after reaching stop will damage valve.

Table 22 —Saturated Temperature - Pressure Chart (oF) R22-PSIG (oF) R22-PSIG (oF) R22-PSIG 32 57.5 44 74.5 80 143.6 33 58.8 45 76.0 85 155.7 34 60.1 46 77.6 90 168.4 35 61.5 47 79.2 95 181.8 36 62.8 48 80.8 100 195.8 37 64.2 49 82.4 105 210.8 38 65.6 50 84.0 110 226.4 39 67.1 55 92.6 115 242.7 40 68.5 60 101.6 120 259.9 41 70.0 65 111.2 125 277.9 42 71.4 70 121.4 130 296.8

43 73.0 75 132.2 140 337.3

Determining System SuperheatAfterthesubcoolinghasbeendetermined,checksystemsuperheat.

1. Determinerequiredsuperheatfromsuperheatrange,table23.2. Measuresuctionlinetemperature6inchesfromservicevalve.3. Measure suction line pressure at service valve and determine

saturatedsuctiontemperaturefromtable22.4. Subtractsaturatedsuctiontemperaturefrommeasuredtemperature

toobtainsuperheat.5. Refertotable23andadjustchargeasrequiredforcorrectsuperheat

atambientconditions.

Each time that charge is added or removed from the system, allow the system to run approximately 20 - 30 minutes before pressure and temperature readings are taken and superheat calculations made.

If system hunting occurs or subcooling is reduced, it may be necessary to adjust TXV to obtain correct superheat.

Superheat Adjustment1. Remove the seal cap from thermal expansion valve (see figure

91).2. Turntheadjustmentscrewclockwisetoincreasesuperheatand

counterclockwise to decrease superheat (see figure 91). One complete360oturnchangesthesuperheatapproximately3-4oF,regardlessoftherefrigeranttype.Asmuchas30minutesmayberequiredforthesystemtostabilizeaftertheadjustmentismade.

3. Replaceandhand-tightensealcap.

Figure 91 - Superheat Adjustment of TXV

SuperheatAdjustment Screw

Counterclockwise To Decrease Superheat Clockwise To Increase

Superheat

Remove Seal Cap

Outdoor

Indoor Coil Air Inlet Temp. Ambient DB/WB (50% RH) 75/63 80/67 85/71 105 * * 8-10 100 * 3-5 9-11 95 * 5-7 11-13 90 * 9-11 13-15 85 5-7 10-12 15-17 80 8-10 12-14 18-20 75 10-12 15-17 21-23 70 13-15 19-21 24-26

65 15-17 21-23 26-28

Table 23 —Superheat Range

Typical conditions - 95oF ambient, 75 psig suction, 285 psig head pressure, 6 - 7o superheat, 15oF subcooling

NOTICE

NOTICE

CAUTION

NOTICE

of 58 IM 817-2

5 TimeClock(TC)(optionalonstandaloneunitsonly)(seefig.94) –Factorymounted7day/24hour,digitaltimeclockwithuptotwenty(20)programstosequencetheunitventilatorthroughoccupied and unoccupied modes in accordance with a userprogrammedtimeschedule.

6 External Signal Connection Plugs: Three (3) multi-pinplugs are factory provided and pre-wired with short wirewhips that are capped (theymust remain capped if not used).Provided for field wiring of :

• RemoteWallMountedTemperatureSensor (optionalaccessory). • ExternalInputSignals(byothers):unoccupied,remote

shutdown,ventilationlockout,dewpoint/humidity(night timeoperation),orexhaustinterlocksignals

• External Output Options (by others): lights on/off, faultindicationsignal,exhaustfanon/offorauxiliaryheat signal.

7 Electric Connection Box:Containsthemotorspeedtransformer.Refer to the unit wiring diagram for specifics.

8 Unit Main Power “On-Off” Switch: (SW1) Disconnects themainpowertotheunitforservicingorwhentheunitistobeshutdownforanextendedperiodoftime.

9 Fuse(s) - Fanmotorandcontrolshavethehotline(s)protectedbyfactoryinstalledcartridgetypefuse(s).

10 Control Transformer - 75VA24-voltNECClass2transformerfor24voltpowersupply.(Locatedbehindthemotortransformer).

11 Outdoor Air/Return Air Damper Actuator - (A1)Directcoupled,floating point (tristate) actuator that spring returns the outdoor air dampertotheclosedpositionuponalossofpower.

12 Face and Bypass Damper Actuator-(A2) Direct coupled, floating point(tristate)actuatorthatisnon-springreturned(ModelAVSonly).

13 Hydronic Coil Low Air Temperature Limit (T6 freezestat) – Factoryinstalledonallunitswithhydronic(water)coils.TheT6freezestatcutsoutat38oF(+/-3oF)andautomaticallyresetsat45oF(+/-3oF).

14 Low Refrigerant Temperature Sensor (S4) -TheS4sensorisprovidedonallunitswithadirectexpansion(DX)coolingcoil.It is located on the right hand side of the coil “u-bend”.

1 MicroTech II Unit Ventilator Controller (UVC): (LocatedBeneaththeLocalUserInterfacePanel).Factorymountedandrun tested, microprocessor-based DDC control device capableofcompleteStandaloneunitcontrol,Master/Servantcontrolorincorporatedintoabuilding-widenetworkusinganoptionalplug-incommunicationmodule.TheUVCcontainsamicroprocessorthatispreprogrammedwiththeapplicationcoderequiredtooperatetheunit.TheUVCsupportsupto6analoginputs,12binaryinputs,and9binaryoutputs.TheUVCEXPI/Oboardsupportsupto4additionalanaloginputsand8additionalbinaryoutputs.Master/Servant units have the controller factory configured and installed for a local peer-to-peer network between these units (networkwiring between these units needs to be field installed). Optional networkcommunicationisprovidedviaplug-incommunicationmodulesthatconnectdirectlytotheUVC.

2 Communication Module (optional): Plug-in networkcommunication module that is attached to the UVC via a 12-pin header and 4 locking standoffs.Available communicationmodules:

• Building Automation and Control Network (BACnet®) Master Servant/Token Passing (MS/TP)-AllowstheUVCtointer-operatewithsystemsthatusetheBACnet(MS/TP)protocolwithaconformancelevelof3.MeetstherequirementsofANSI/ASHRAE135-1995standardforBACnetsystems.

• LonWorks® compliant Space Comfort Controller (SCC) – Supports the LonWorks SCC profile number 8500_10.

• Metasys N2® Open – Provides N2 Open networkcommunicationcapabilitytotheUVC.

3 LocalUserInterface(LUI):(seefig.93)TheLUIprovidesaunitmountedinterfacewhichindicatesthecurrentunitoperatingstateandcanbeusedtoadjusttheunitventilatoroperatingparameters(operatingmode,temperaturesetpoints,fanspeedandoccupancymode).TheLUIfeaturesa2-digitdisplay,7keys(1keyishidden),and 9 individual LED indicators. See “Local User Interface” for furtherdetails.

4 TenantOverrideSwitch(seefig.94)–Providesamomentarycontact closure that causes the unit to enter the “tenant override” operatingmodeforasettimeperiod(default=120minutes).

1

2

7

8

9

10

12

11

6

Figure 92 - MicroTech II Sensor and Component Locations (Front View)

14

1315

17 18

1916

20

Making Control ConnectionsMicroTech II™ Unit Mounted DDC Control Components – Models AVS, AVV, and AVR

Not all external signal options can be used simultaneously and may not be available on all software models. Refer to the “UVC Input and Output Tables” in IM 739 for available options.

NOTICE

IM 817-2 Page 31 of 58

Figure 94 - AV Top View

43

5

15 Room Temperature Sensor -(S1)Theunitmountedsensorislocated in the sampling chamber (front, center section) whereroom air is continuously drawn through for prompt responsetotemperaturechangesintheroom.ARemoteWallMountedTemperatureSensorisalsoavailableforremoteroomtemperaturesensing.(optionalaccessory).

16 Discharge Air Temperature Sensor - (S2) The sensor islocatedonthesecondfanfromtherighttosensedischargeairtemperatures.

17 Outdoor Air Temperature Sensor-(S3)Thesensorislocatedintheoutdoorairsectionoftheunitbeforetheoutdoorairdamper.With network applications, the unit mounted sensor can beoverriddenbyaremotesensorthroughthenetwork.

18 Outdoor Air Humidity Sensor (S8) (optional)-Unitmountedhumidity sensor for units using Expanded outdoor enthalpyeconomizer or Leading Edge indoor/outdoor, true enthalpycomparisoneconomizer.Thesensorislocatedintheoutdoorairsectionoftheunitbeforetheoutdoorairdamper.Withnetworkapplications, the unit mounted sensor can be overridden by aremotesensorthroughthenetwork.

19 Room Humidity Sensor (S6) (optional) -Unitmountedhumiditysensor for units capable of passive or active dehumidification orwithunitsusingLeadingEdgeindoor/outdoor,trueenthalpycomparisoneconomizer.Thesensor is located in thesamplingchamber(front,centerpanel)whereroomairiscontinuouslydrawnthroughforfastresponsetohumiditychangesintheroom.Withnetworkapplications,theunitmountedsensorcanbeoverriddenbyaremotesensorthroughthenetwork.

20 CO2 Sensor (S7) (optional) –Unitmounted,singlebeamabsorptioninfraredgassensorwithasensingrangeof0–2000ppmandvoltage output of 0 to 10VDC (100 ohm output impedance).ThePitotTubesensingdeviceislocatedintheunitventilator’sreturnairstream.TheoptionalCO2sensorisusedwiththeUVC’sDemandControlVentilationfeaturetovarytheamountofoutsideairbasedonactualroomoccupancy.Withnetworkapplications,theunitmountedsensorcanbeoverriddenbyaremotesensorthroughthenetwork.

21 Control Valve(s) (not shown) –Optionalaccessoryvalve(s)maybe either 2 position “End of Cycle” (AVS models) or modulating (AVVandAVRmodels),tocontrolthequantityofwaterthroughthe coil. Available in 2-way or 3-way configurations. Spring return actuatorsarerequiredforallhotwaterandsteamheatingvalves.AllheatingvalvesareNormallyOpen(NO)andallcoolingvalvesNormallyClosed(NC).(Seepiping/valvesection)

22 Water In Temperature Sensor (S5)(not shown) –Thewaterintemperaturesensorisfactorywiredon2-pipeCW/HWunitsonly. The sensor must be field installed and insulated (by others) onthesupplyconnectionofthehydroniccoil.Thesensormustbelocatedonthesupplyconnectionwherethereiscontinuouswaterflow. It is located on the same side as the coil connections. The sensormeasurestheenteringwatertemperaturetodetermineifthetemperatureisacceptableforeitherheatingorcoolingbasedontheunit’soperatingstate.(seepipingsection)

Figure 93 - MicroTech II Control Boards (with LonWorks Module Installed)

Plug-in Control Module Terminal Connections

Note: If Installing Communication Module, refer to the installation instructions specific to that Communication Module.

IM 731 - MicroTech II BACnet® Communications Module for BACnet Master-Servant/Token Passing Networks.

IM 729 - MicroTech II LonWorks Communications Module compliant with LonMark Space Comfort Controller (SCC) Functional Profile.

IM 730 - MicroTech II Metasys N2® Communications Module for N2 Open Networks

of 58 IM 817-2

Figure 95 - Local User Interface (LUI)

MicroTech IITM

FAN ONLY

COOL

HEAT

AUTO

HIGH

MED

LOW

AUTO

FUNC

ON/STOPFANMODE

Economizer Control CapabilitiesBasic–Comparestheinsideandoutsideairtemperaturesusingitem16(RoomTemperatureSensor)anditem18(OutdoorAirTemperatureSensor) to determine if outdoor air can be used for “free”, economizer coolingoperation.

Expanded -Comparestheinsideandoutsideairtemperaturesusingitem16(RoomTemperatureSensor)anditem18(OutdoorAirTemperatureSensor)andcalculatestheenthalpyoftheoutsideairrelativehumidityusingitem19(OutdoorAirHumiditySensor)todetermineifoutdoorair can be used for “free”, economizer cooling operation.

Leading Edge–Trueenthalpycomparisoneconomizerthatcomparestheinsideandoutsideairtemperaturesusingitem16(RoomTemperatureSensor)anditem18(OutdoorAirTemperatureSensor)andcomparestheenthalpyoftheinsideandoutsideairrelativehumidityusingitem19 (Outdoor Air Humidity Sensor) and item 20 (Room HumiditySensor) to determine if outdoor air can be used for “free”, economizer coolingoperation.

Economizer for ReheatBasic–Usesitems16(RoomTemperaturesensor,item18(OutdoorAirTemperatureSensor)and item20(RoomHumiditySensor) foractive dehumidification (reheat) or to determine if outdoor air can be used for “free”, economizer cooling operation.

Leading Edge-Usesitems16(RoomTemperatureSensor),item18(OutdoorAirTemperatureSensor), item19(OutdoorAirHumiditySensor) and item 20 (Room Humidity Sensor) for active dehumidification (reheat) or to determine if outdoor air can be used for “free”, economizer coolingoperation.

Local User Interface (LUI)Thebuilt-inLUItouchpad(SeeFigure94,item3)hasa2-digitLEDdisplaythatindicatesthecurrentunitoperatingstate.SeeOMforunittype, for details of operation. The touch pad will “digitally display”:

• Theroomsetpointtemperature• CurrentRoomTemperature(Withcertainbuttonsheldinplace)• Anyfaultcodefordiagnosticsattheunit(Withcertainbuttons

heldinplace)

TheLUIhas abuilt inmenu structure (HiddenKeyandPasswordprotected)with7keys(1keyishidden)and9individualLEDindicatorstoadjusttheunitventilatoroperatingparametersshownbelow.

Operating Mode States (4)• Heat-Heatingandeconomizeroperationonly

• Cool–Coolingandeconomizeroperationonly

• Fan Only–Fanoperationonly

• Auto – Unit automatically switches between heating,cooling and economizer operation to satisfy the room loadconditions.Thecurrentunitstateisalsodisplayed.

Fan States (4)• High(constantspeed)

• Medium (constantspeed)

• Low (constantspeed)

• Auto(partload,variableair)–Variesthefanspeedautomaticallytomeettheroomloadconditionswhethertheunitisinheating,cooling or economizer mode. The current fan speed is alsodisplayed.Duringlowloadornormaloperation(about60%ofthetime)thefanswilloperateatlowspeed.Whentheloadincreasestoanintermediatedemandthefansautomaticallyshifttomediumspeed. Atneardesignordesign loadconditions, thefanswilloperateonhighspeed.A10-minutedelaybetweenspeedchangesisincorporatedtominimizetheawarenessofthesechanges.Theoutdoorairdamperwillindexbasedonthefanspeedtomaintaintherequiredminimumcfm(cubicfeetperminute)ofventilationair.

Occupancy Modes (4)• Occupied–Normal,daytimeoperationwheretheunitmaintains

theroomsetpoint.

• Unoccupied –Nightsetbackoperatingmodeinwhichtheunitresponds to a new room set point and cycles to maintain thecondition.Thefancomesonwhenheatingorcoolingisneededand runs until the load is satisfied. The outside air damper is closed duringthismode.Withdirectexpansion(DX)coolingunits,whena cooling load is satisfied by the refrigerant system, the compressor isde-energizedandtheUnitVentilatorindoorfancontinuestorunfor a fixed period of time to remove possible frost buildup on the evaporatorcoil.

• Stand By Mode –Theunitventilatormaintainsthestandbymodesetpointtemperaturewiththeoutsideairdamperclosed.Thefanruns continuously unless it is configured to cycle in response to theroomload.

• Bypass Mode – By depressing the Tenant Override Switch(Item4) theunit isplacedback into theOccupiedModeforapredeterminedtime(defaultof120minutes).Thistimecanbesetin1-minuteincrementsfrom1minuteto240minutesthroughtheUnitVentilatorServiceTooloranetwork.

IM 817-2 Page 33 of 58

Refer to unit wiring diagram located on inside of right front panel, for actual wiring. Improper wiring can cause equipment and property damage.

MicroTech II Wiring Diagram – Typical

Motor

X1Trans.TapsperUnitSize(CFM)

750 1000 1250 1500 2000

HI BRN BLK BLK YEL 1/4 HP MED BLU BRN BRN BLK LOW BLU/WHT BLU BLU BRN HI BLU 1/3 HP MED BLU/WHT LOW YEL HI RED RED RED RED RED 1/2 HP MED BRN BRN BRN BLK BLU LOW YEL YEL YEL YEL BLK

Figure 96 - DE Cooling W/Hot Water Heat Damper Control 115, 208/230. 265 Volt/1 Phase

CAUTION

DISCONNECT ALL ELECTRICAL POWER BEFORE SERVICING UNIT TO PREVENT INjURY OR DEATH DUE TO ELECTRICAL SHOCK.

USE COPPER CONDUCTORS ONLY.UNIT TERMINALS ARE NOT DESIGNED TO ACCEPT OTHER TYPES OF CONDUCTORS.FAILURE TO DO SO MAY DAMAGE THE EQUIPMENT.

DANGER CAUTION

of 58 IM 817-2

See Table 24, and Figures 96, 97 & 98 and the job-specific electrical drawings before proceeding with field power and control wiring. See also the wiring diagram provided on the unit ventilator right frontaccesspanel.Unitventilatorsequippedwithanoptionalelectricheatingcoilhaveelectricheatingcoilpowerconnectionsatrightendonly.

Procedure1. Providepowersupply to rightendcompartment tomatchunit

nameplate.

2. Wireleadsprovidedfromunitventilatorelectricconnectionboxtoloadsideofunitpowerswitch(switchprovidedbyAAF).

Thejunctionboxhas1"(25mm)and2"(51mm)knockouts,located10-1/2"(267mm)fromrightendofunit.

3. Providegroundwirefromgroundingscrewinswitchjunctionboxtoswitchgroundterminal.

4. Wire field power supply to line side of unit power switch. Wire groundconductortoswitchgroundterminal.

5. Mountunitpowerswitchinswitchjunctionboxandinstallswitchcoverplate(provided).

6. Onunitswithelectricheat,the2poleunitpowerswitchisreplacedby a 3 pole switch, and is mounted as shown on figure 97. (A) shows switchlocationforvalvecontrolunitsand(B),(C)and(D)showlocationforFace&Bypasscontrolunits.(B)isfor208,230and265voltunits.(C)showslocationfor460voltunits.

7. Use IM 747 for MicroTech II wiring information/installationprocedures.

Table 24 - Floor AV Electrical Data/Motor Data and Unit Amp without electric heat

Unit CFM L/s Motor UnitCurrent#

Series (Nom.) HPWatts

115V 208V 230V 265V S07 750 354 1/4 164 1.8 1.0 0.9 0.8 S10 1000 472 1/4 244 3.1 1.7 1.5 1.3 S13 1250 590 1/4 306 3.5 1.9 1.8 1.5 S15 1500 708 1/4 334 3.7 2.0 1.8 1.6

# Amps at unit voltage, 60 Hz, single phase

Use copper conductors only. Use of aluminum conductors may result in equipment failure and overheating hazards. All wiring in right hand compartment must be class 1.

MicroTech II™ Unit Electrical Connections

To avoid electrical shock, personal injury or death, be sure that field wiring complies with local and national fire, safety, and electrical codes, and voltage to the system is within the limits shown in the job-specific drawings and unit electrical data plate(s).

Power supply to unit must be disconnected before making field connections. To avoid electrical shock, personal injury or death, be sure to rigorously adhere to field wiring procedures regarding proper lockout and tagout of components.

Figure 97 - Electric Heat Unit Power Switch Locations

A

B

C

D

Figure 98 - Electric Connection Box and Junction Box Located in Right End Compartment

Auto Transformer

Fuses

High-Med.-Low-Off Motor Speed Switch

Switch junction Box

Terminal Strip

Electric Power Wire Opening in Back of Box

See tables 30 & 31, pages 47 & 48 for electric heat wiring data

DANGER

WARNING

CAUTION

IM 817-2 Page 35 of 58

Rigorously adhere to field wiring procedures regarding proper lockout and tagout of components.

MicroTech II™ Remote Wall Mounted Sensor

To avoid electrical shock, personal injury or death:1. Installer must be qualified, experienced technician.2. Disconnect power supply before installation to prevent

electrical shock and damage to equipment.3. Make all connections in accordance with electrical wiring

diagrams, and in compliance with national and local codes. Use copper conductors only.

4. Do not exceed ratings of the device. This is a low voltage device: Never apply more than 12VAC/VDC to any lead or damage will result.

5. Avoid locations where excessive moisture, corrosive fumes, or vibrations are present.

Window Exposure

Window Exposure

Window

Exposure

Interior Wall

Interior Wall

Interior Wall

Interior Wall

Unit

Unit

= Correct Sensor LocationFigure 100 - Correct Wall Sensor Locations

Note: Avoid placing wall sensor near drafty areas such as doors or windows. Avoid external walls, or dead spots near exposed columns. Avoid direct sunlight on wall sensor.

Window Exposure

= Incorrect Sensor Location

Window Exposure

Interior Wall

Interior Wall

Window Exposure

Unit

Unit

Interior Wall

Interior Wall

Window Exposure

Cubicle Wall

Shelving

File Cabinet

Shelving

Figure 101 - Incorrect Unit and Wall Sensor Locations

Figure 99 - Basic Remote Wall Sensor

LED

Tenant Override Button

Sensor

All MicroTech II equipped unit ventilators are provided as standard with a unit mounted space temperature sensor. The unit mounted temperature sensor is provided with a quick disconnect plug (white) located outside of box with numbered wires 101 and 102. When using a remote wall mounted temperature sensor the unit mounted temperature sensor quick disconnect plug must be separated so that the unit mounted sensor is disconnected from the UVC.

When Using A Remote Wall Mounted Temperature SensorIfadecisionismadetouseaRemoteWallMountedTemperatureSensorinsteadof theunitmounted roomair sensor thenplacementof theRemoteWallMountedTemperatureSensoriscriticalforproperroomtemperature sensing (see figures 100 and 101). The UVC is capable of usingoneofthreeremotewallmountedtemperaturesensors.Figure104showsa4-wireconnection(plusshielddrainwire)(seetable25).Itisrecommendedthatadditionalwiresbepulledtocompensateforpotentialwirebreakageor futureoptions.TheBasicWallMountedTemperatureSensorrequiresonly3-wires(plusshielddrainwire)sincetheBasicWallMountedTemperatureSensorhasnosetpointadjustment(see figure 103).

Table 25. Max Sensor Wire Length and Gauge

WARNING

WARNING

NOTICE Maximum sensor wire length for less than 1oF error

Gauge Length

14 AWG 800 ft. (244 m) 16 AWG 500 ft. (152 m) 18 AWG 310 ft. (94 m) 20 AWG 200 ft. (61 m) 22 AWG 125 ft. (38 m)

of 58 IM 817-2

Wire Wips for Field Wiring with Caps (see the wiring diagram provided on the unit ventilator right front access panel)

Field Wiring at back of Local User Interface (LUI) Panel

Figure 102 - Model AV - Field Wiring Whips with Caps Viewed from Right End Compartment

Two pin plug for unit mounted sensor

▲

Field Wiring Remote Mounted Temperature SensorThe low voltage field wiring connections have all been centrally located withintheunitventilatorandareeasilyaccessible.To simplify field connections, multi-pin plugs are factory provided and pre-wired with short wire whips (see figure 102). Each of the wires in thesewirewhipsiscappedandshouldremaincappedifnotused.Theunitmountedtemperaturesensorisprovidedwithaquickdisconnectplug(white)withwiresnumbered102and103,andmustbeseparatedsothattheunitmountedsensorisdisconnectedfromtheUVC.Thisdisables the unit mounted sensor (see figure 102). See Figures 103 and104forwiringtheremotemountedtemperaturesensortotheunitcontrolwiring.All low voltage field wiring connections must be run in shielded cable with the shield drain wires connected as shown in the field wiring diagrams.

Installing the Remote Mounted Temperature Sensor

This describes the installation of the following three wall mountedsensormodels:• P/N111048101–Basic• P/N111048103–Expanded±3oFsetting• P/N111048102–Deluxe54oFto85oFsettingUse the installation instructions included with the Remote wallsensor.

Parts Included - All Models• pre-assembledsensorthatincludes: -large(50.8x101.6mm[2x4in.])mountingbase(1) -terminalblock(1) -1.5mm(1/16in.)coverscrew(1) -endcaps(2)• alternatesmall(80x80mm[3.15x3.15in.])mounting base(1)withattachedterminalblock(1)• coversliderinsertwithprintedlogosforMcQuay®(1) andAAF®(1)• No. 6-32 x 1 in. flat-head screw (2)• No.8x1.25in.panheadtappingscrew(2)• hollowplasticwallanchor(2)

Parts Included - 111048102 and 111048103 Only• alternateserratedsetpointdial(attached)• smoothsetpointdial(separate)

Special Tools Needed• .5mm(1/16in.)Allenwrench• 7 mm (1/4 in.) flat-blade screwdriver• holesawwith35mm(1-3/8in.)blade(forsurfacemounting only)• drillwith8mm(5/16in.)drillbit(forsurfacemountingonly)

The unit comes with a unit mounted sensor and does not require a remote wall mounted sensor.

Figure 104 - Wall Mounted Temperature Sensor Wiring for Expanded and Deluxe Wall Sensor

BLK

Static sensitive components. A static discharge while handling electronic circuit boards can cause damage to the components.Discharge any static electrical charge by touching the bare metal inside the main control panel before performing any service work. Never unplug any cables, circuit board terminal blocks, relay modules, or power plugs while power is applied to the panel.

Figure 103 - Wall Mounted Temperature Sensor Wiring for Basic Wall Sensor

896

P 1C o n n e c t o r

BLKWHTR E D

WireC a p s

Unit Ventilator

LED

C o m mAI-1

AI-2GND

6432

51

S e t p t . A d j .C o m mS e n s o rLED

Wal l Sensor(opt ion)

S h i e l d

F ie ld Wir ing (by Others)E x t e r n a l D e v i c e ( b y O t h e r s )

Factory Wir ing

GRN

CAUTION

NOTICE

IM 817-2 Page 37 of 58

6. Rotatethemountingbaseuntiloneofthearrowsonthe basepointsup.Ifnecessary,repositionthecoverscrew abovethearrow.Placethebaseagainstthewall,andmarkthescrew

holesusingthebaseasatemplate.7. Drilltwo8mm(5/16in.)holesatthemarkings.8. Insertthehollowplasticwallanchors(Figure106),position thebase,andthendrivethetwopan-headtappingscrews.9. Pullthewiringthroughthemountingbase.10.Removeterminalblockandwiretotheappropriateterminalsas

shownin“Wiring”.

11. Install terminal block onto sensor with terminal 6 next to the edge of sensor.

12. Replacethesensorandtightenthecoverscrew.13. Replacethetwoendcapsonthemountingbase.

Figure 107 - Insert Wall Anchors

Performing Surface Mounting Using Small BaseToperformsurfacemountingusingthesmallbase(Figure108):

Figure 106 - Surface Mounting Using Large Base

1. Slidethedesiredcoversliderinsertontothesensoruntilitsnapsintoplace.

2. Removethetwoendcapsfromthemountingbase.3. Removethecoverscrewusinga1.5mm(1/16in.)Allen wrenchanddiscardit.Removethesensor.4. Removeanddiscardtheterminalblockfrominsidethesensor.5. Drilla35mm(1-3/8in.)holeinthesurfacewherethesensorwill

bemounted.

MountingThe MicroTech II™ Wall Mount Sensor allows for two mountingmethods:wallboxmountingandsurfacemounting.

Note: Wallboxmountingrequiresthelargemountingbase.Useeitherthelargeorsmallmountingbaseforsurfacemounting.

Performing Wallbox MountingToperformwallboxmounting(Figure105):1. Slidethedesiredcoversliderinsertontothecoveruntilit snapsintoplace.2. Removethetwoendcapsfromthemountingbase.3. Loosenthecoverscrewusinga1.5mm(1/16in.)Allen wrenchandremovethesensor.4. Pullthecableorwiringthroughthewallboxandmountingbase.5. Rotatethemountingbaseuntiloneofthearrowsonthe basepointsupandthescrewopeningsinthebasealign withthethreadedholesinthewallbox.Ifnecessary,repositionthe

coverscrewabovethearrow.6. FastenthebasetothewallboxwiththeNo.6-32x1in. screwsprovided.7. Removeterminalblockandwiretotheappropriateterminalsas

shownin”Wiring”.

9. Replacethesensorandtightenthecoverscrew.10.Replacethetwoendcapsonthemountingbase.

Figure 105 - Wallbox Mounting

Performing Surface Mounting Using Large BaseToperformsurfacemountingusingthelargebase.(Figure106):1. Slidethedesiredcoversliderinsertontothesensoruntilitsnaps

intoplace.2. Removethetwoendcapsfromthemountingbase.3. Loosenthecoverscrewusinga1.5mm(1/16in.)Allen wrenchandremovethesensor.4. Drilla35mm(1-3/8in.)holeinthesurfacewherethesensorwill

bemounted.5. Pullthecableorwiringthroughthehole.

8. Install terminal block onto sensor with terminal 6 next to the edge of sensor.

IMPORTANTIMPORTANT

of 58 IM 817-2

Setup and AdjustmentsSwitching Setpoint DialsToswitchsetpointdials:1. Removethesensorfromthemountingbase.2. Rotatethesmoothsetpointdialsothatitpointsstraightup.3. AsshowninFigure111,inserttheAllenwrenchthroughthehole

inthebackoftheprintedwiringboard(A)andpushgentlyuntilthesmoothsetpointdialisfree.

4. Presstheserratedsetpointdialintoplaceonthesensor, makingsurethatthedialpointsstraightup.5. Replacethesensoronthemountingbase.

Repairs and ReplacementNorepairoptionsavailable.CallyourlocalAAF-HermanNelsonrepresentativeforsensorreplacement.

Wiring

Figure 109 - 111048101 Sensor Wiring

Figure 108 - Surface Mounting Using Small Base

TerminalBlockon111048101Sensor

Shielded cable should always be used. However, shielded cable generally is not required, except in electrically noisy environments, such as near gas ignition systems, radar or magnetic resonance imaging equipment, etc. It is the responsibility of others to determine what constitutes an “electrically noisy” environment for each installation. Refer to table 25, page 35 for maximum wire length.

6. Pullthecableorwiringthroughthehole.7. Placethesmallbaseagainstthewall,(withthearrowon thebasepointingup)andmarkthescrewholesusingthe baseasatemplate.8. Drilltwo8mm(5/16in.)holesatthemarkings.9. Insertthehollowplasticwallanchors(Figure108),position thebase,andthendrivethetwopan-headtappingscrews.10.Pullthewiringthroughthemountingbase.11.Wiretotheappropriateterminalstothesmallmounting baseasshownin“Wiring”.12.Snapthesensorintothesmallmountingbase(coverscrewisnot

required).

Figure 110 - 111048102 and 111048103 Sensor Wiring

Figure 111 - Removing the Standard Setpoint Dial

A

Setpoint Dial

NOTICE

IM 817-2 Page 39 of 58

DigitalReadyisafactoryinstalledpre-wiredpackageofselectedDirectDigital Control (DDC) components. It facilitates the field hook up of a DDCUnitVentilatorController(UVC)thatiscompatiblewiththesefactoryinstalled,pre-wiredcomponents,andcapableofprovidingthestandardASHRAEIIcycle.

It is the responsibility of the Automatic Temperature Control supplier to ensure the controls operate correctly and protect the unit.

DigitalReadyconsistsofthefollowingcomponentswhicharefactorywiredandpowered:

1 Unit Main Power “On-Off” switch – disconnects main power to theunitforservice.Non-fusedpowerinterruptswitch

2 Fuse(s)–fanmotor,autotransformer andcontrol transformerhavethehotline(s)protectedbyfactoryinstalledcartridgetypefuse(s).

3 Three (3) speed HIGH-MEDIUM-LOW-OFF motor fan speedswitch(SW2).

4 75 VA 24-volt NEC Class 2 transformer for 24-volt powersupply

5 Three10-poleEuropatype16awgterminalstripsratedfor10ampsat300voltswithnickelplatedconnectorsandzincplatedclampingscrews(TB1,TB2,TB3).

6 Spaceavailableinleftendcompartment,approximately8"x21"(203mmx533mm)forUVCmounting(byothers)

Making Control ConnectionsDigital Ready™ – Face & Bypass Control Components Model AVS

1

2

3

4

57

8

9

10

12

11

6

Figure 112 - Component Locations (Vertical Floor Unit Shown)

13

15

Outdoor Air Opening (Sensor)

Motor

Wired to the Terminal Strips:

7 Interface with the fan motor start/stop relay, (R4) in electricconnectionbox.

8 InterfacewithafactoryinstalledLowAirTemperatureLimit(T6-Freezestat).Cutsoutbelow38oF±2oFandautomaticallyresetsabove45oF±2oF.Respondswhenany15%ofthecapillarylengthsensesthesetemperatures.WiredsothatuponT6cutout,theoutsideairdamper(A1)closes,thehotwatervalveopensandthe24voltpowersupplytotheterminalstrip(T6Sig)isinterrupted.

9 DischargeAirTemperatureSensors–(S2)10KohmNTC(NegativeTemperature Coefficient) and 1 K ohm PTC (Positive Temperature Coefficient). Located on the second fan housing from the right to sensedischargeairtemperatures.

10 RoomTemperatureSensors-(S1)10Kohm(NTC)and1Kohm(PTC).Theunitmountedsensorsarelocatedintheunitsamplingchamber (front center section), where room air is constantlydrawnthroughforpromptresponsetotemperaturechangesintheroom.

11 OutdoorAirTemperatureSensors-(S3)10Kohm(NTC)and1Kohm(PTC).Thesensorsarelocatedintheoutdoorairsectionoftheunitbeforetheoutdoorairdamper.

12 Directcoupled,proportionalcontrol(2to10VDCor4to20mA)OutdoorAir/ReturnAirDamperActuator(A1)(springreturn).

13 Directcoupled,proportionalcontrol(2to10VDCor4to20mA)FaceandBypassDamperActuator(A3)(non-springreturned).

14 InterfacefromtheterminalboardwithoneortwoEndofCycleDDC valves with spring return actuators (by others) (NotShown)providing24-voltpower.Open/shut signal fromUVC(byothers).

15 24-volt power wiring harness from the right to left-hand endcompartmentthroughthebuilt-inmetalwireracewayterminatingatthreeterminalblocks.

16 LowRefrigerantTemperatureSensor(T4-capillarysensor),helpsprotectagainstabnormallylowevaporatorcoiltemperatures.DirectExpansion(DX)unitsonly(Notshown).

CAUTION

of 58 IM 817-2

Ref

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IM 817-2 Page 41 of 58

Figure 114 - Sensor Locations

Discharge Air Sensor

Room Air Sensor

Holes in Front Access Panel

Outdoor Air Sensors

Outdoor Air Opening

basedona2to10VDCinputfromtheDDCUnitVentilatorController(UVC). A 4 to 20 mA input signal can be used with the field addition of aBelimoZG-R01(orequivalent)500ohmresistor(byothers).Refertothewiringdiagramforproperinstallationoftheresistor.A2to10VDC output signal is provided for damper position feedback. Thegearscanbemanuallydisengagedwithabuttonontheactuatorcover.Rotationiscounterclockwisetobypassairaroundcoil.

Theoutdoorair/returnairdamperactuatorisaunitmounted,directcoupled,proportionalcontrolactuatorthatspring returnstheoutdoorairdampershutuponalossofpower.Theactuatorprovidesproportionaldampercontrolbasedona2 to10VDC input from theDDCUnitVentilatorController(UVC).A4to20mAinputsignalcanbeusedwith the field addition of a Belimo ZG-R01 (or equivalent) 500 ohm resistor(byothers).Refertothewiringdiagramforproperinstallationoftheresistor.A2to10VDCoutputsignalisprovidedfordamperpositionfeedback.RotationisclockwisetoopenOA,closeRA.

Face and Bypass Damper ActuatorTheFace&Bypassdamperactuatorisaunitmounted,directcoupled,non-springreturnedactuatorusedforthemodulationofthefaceandbypass damper. The actuator provides proportional damper control

A 10 K ohm Negative Temperature Coefficient (NTC) sensor and a 1 K ohm Positive Temperature Coefficient sensor is provided for the dischargeair,outdoorairandroomairtemperaturemeasurement.TheyarelocatednexttoeachotherintheairstreamasshowninFigure114.Each iswired to the terminalstripseparatelyso that theAutomaticTemperatureControlcontractormayselecttheappropriatesensorfortheapplication.

10 K ohm NTC SensorThe10KohmNTCsensorisconstructedfromstainlesssteelwithanepoxysealandtwistedwireleads.

Type: 10K ohm @ 25oCAccuracy: ±0.2oF, 40oF - 80oF ±0.36oF, 32oF - 158oF

1 K ohm PTC SensorThe1Kohmsensorisashrink-wrapencapsulated,PTCsiliconsensingelementwithstranded,tinnedcopperwireleads(#22AWG).

Type: 1035 ohm @ 25oCAccuracy:±0.9oF, 5oF - 167oF

Digital Ready Unit MountedTemperature Sensor Specifications

Actuator Type Power Power Transformer Torque Running Direction of Rotation

Supply Consumption Sizing Time

Outdoor Air/Return Air 24 VAC ±20% 4 VA 80 to 110 sec Reversible with built in switch L/R

Damper Actuator

50/60 HZ 2 Watts (class 2 power source) 45 in-lb for 0 to 35 in-lb L = CW with an increase in voltage. 24 VDC ±10% R = CCW with an increase in voltage. Spring: reversible with CW/CCW

Face & Bypass Damper Actuator 24 VAC ±20% Running: 2.5 Watt; 5 VA 90 sec constant mounting.

50/60 HZ Holding: 1 Watt (class 2 power source) 45 in-lb (independent Motor: reversible with built in switch. 24 VDC ±10% of load) CW = CW with a decrease in signal. CCW = CCW with a decrease in signal.

Table 27. - Actuators Technical Data

Table 26 - Temperature Sensors Resistance Values

Digital Ready – Damper Actuator SpecificationsOutdoor Air/Return Air Damper Actuator

Figure 115 - Outdoor Air/Return Air Damper Actuator & Face and Bypass Damper Actuator

Temperature (oC) -40 -20 0 20 25 30 40 50 60

10 K ohm (NTC)

Resistance (ohms) 337200 97130 32660 12490 10000 8056 5326 3602 2489

1 K ohm (PTC)

Temperature (oC) -40 -20 0 20 25 30 40 50 60

Resistance (ohms) 613 727 855 997 1035 1074 1153 1237 1323

of 58 IM 817-2

Table 28 - Floor AV Electrical Data/Motor Data and Unit Amp without electric heat Unit CFM

L/s Motor UnitCurrent#

Series (Nom.) HP

Watts 115V 208V 230V 265V

S07 750 354 1/4 164 1.8 1.0 0.9 0.8 S10 1000 472 1/4 244 3.1 1.7 1.5 1.3 S13 1250 590 1/4 306 3.5 1.9 1.8 1.5

S15 1500 708 1/4 334 3.7 2.0 1.8 1.6

# Amps at unit voltage, 60 Hz, single phase

Digital Ready Unit Electrical Connections

See Table 28, and Figure 113 and the job-specific electrical drawings before proceeding with field power and control wiring. See also the wiring diagramprovidedontheunitventilatorrightfrontaccesspanel.Inaddition,thoseunitventilatorsequippedwithoptionalelectricheatingcoilhaveelectricheatingcoilpowerconnectionsatrightendonly.

Procedure1. Provide power supply to right end compartment to match unit

nameplate.




Figure 117 - Unit Left End Compartment and Terminal Strip

Figure 116 - Terminal Strip




6. Figure121(A)showsswitchlocationforvalvecontrolunitsand(B),(C)and(D)showlocationforFace&Bypasscontrolunits.(B)isfor208,230and265voltunits.

7. See figure 116 & 120 for terminal strip designations.

Terminal Strip

Left End Compartment for Mounting Controls by Others







WARNING

WARNING

CAUTION

IM 817-2 Page 43 of 58

5 Fordirectexpansion(DE)coilstheunitissuppliedwithaLowRefrigerantTemperatureSensor (T4-capillarysensor), that islocatedontheleavingairsideofthedirectexpansioncoil.T4cutsoutbelow34oF±2oFandautomaticallyresetsabove38oF±2oF.Respondswhenany15%ofthecapillarylengthsensesthesetemperatures.

6 ForDirectExpansion(DE)coilstheunitissuppliedwitha40VA,24volt,NECclass2transformer,for24voltpower(X2),withafactoryinstalled5minutetimerdelayrelay(TDR)(locatedinsideUnitPowerBox).

It is the responsibility of the Automatic Temperature Control supplier to ensure that T4 and R4 are incorporated properly to protect the unit.

Making Control ConnectionsControls by Others ComponentsAAF®-HermanNelson® unit ventilators come with factory installedcomponents and wiring. It facilitates the field hookup of controls by others,capableofprovidingthestandardASHRAEIIcyclethatarecompatiblewiththesefactoryinstalledandpre-wiredcomponents.

It is the responsibility of the Automatic Temperature Control supplier to ensure the controls operates correctly and protect the unit.

Controlsbyothersoptionconsistsofthefollowingcomponentswhicharefactoryprovidedandwiredwhereindicated:

1 Unit Main Power “On-Off” switch – disconnects main power to theunit.Non-fusedpowerinterruptswitch(S1)

2 Fanmotor,autotransformerandcontroltransformerhavethehotline(s)protectedbyfactoryinstalledfuse(s).

3 Three (3) speedHIGH-MEDIUM-LOW-OFFmotor fan speedswitch (SW2), wired to auto transformer (X1), to provide fanspeed/airdelivery.

4 FactoryinstalledLowAirTemperature(limitT6-freezestat)acrossleavingairsideofhydronicheatingcoil.Cutsoutbelow38oF±2oFandautomaticallyresetsabove45oF±2oF.Respondswhenany15%ofthecapillarylengthsensesthesetemperatures.

It is the responsibility of the Automatic Temperature Control supplier to ensure the T6 freezestat is incorporated properly to protect the unit.

Figure 118 - Controls by Others Unit Component Locations

Figure 119 - Controls by Others Unit Power and Junction Box Connection Location

1

2

3

4

5

6

6

Motor

Auto Transformer

Fuses


Switch junction Box

Terminal Strip


CAUTION

CAUTION

CAUTION

of 58 IM 817-2

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IM 817-2 Page 45 of 58

Table 29 - Floor AV Electrical Data/Motor Data and Unit Amp without electric heat

Unit CFM L/S Motor UnitCurrent#

Series (Nom.) HP

Watts 120V 208V 230V 265V

S07 750 354 1/4 216 2.2 1.2 1.1 1.0 S10 1000 472 1/4 277 2.8 1.6 1.4 1.3 S13 1250 590 1/4 335 3.3 1.9 1.7 1.5

S15 1500 708 1/4 445 4.4 2.6 2.3 2.0

# of Amps at unit voltage, 60 Hz, single phase

See Table 29, and Figures 120 - 122 and the job-specific electrical drawings before proceeding with field power and control wiring. See also the wiring diagram provided on the unit ventilator right frontaccesspanel.Unitventilatorsequippedwithanoptionalelectricheatingcoilhaveelectricheatingcoilpowerconnectionsatrightendonly,(seetables30&31,pages47-48).

Procedure1. Providepowersupply to rightendcompartment tomatchunit

nameplate.






6. Onunitswithelectricheat,the2poleunitpowerswitchisreplacedby a 3 pole switch and is mounted as shown on figure 121. (A) showsswitchlocationforvalvecontrolunitsand(B),(C)and(D)showlocationforFace&Bypasscontrolunits.(B)isfor208,230and265voltunits.(C)showslocationfor460voltunits.

Also,onelectricheatunitswithcontrolsbyothers,wiringtothefield mounted controller is done in the left end compartment. See specific wiring diagram for details.

Theunitcomeswithwiringthatrequiresrelaycontrolsbyothers.

It is the responsibility of the Automatic Temperature Control supplier to ensure that the proper electric heat control components are installed, and operate correctly to protect the unit.

Making Control ConnectionsControls by Others – Electrical Connections

See tables 30 & 31, pages 47 & 48 for electric heat wiring data

Figure 121 - Electric Heat Unit Power Switch Locations

A

B

C

D

Figure 122 - Controls by Others Unit Power and Junction Box Connection Location

Auto Transformer

Fuses


Switch junction Box

Terminal Strip









WARNING

WARNING

CAUTION

CAUTION

of 58 IM 817-2

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IM 817-2 Page 47 of 58

To avoid electrical shock, personal injury or death, be sure that field wiring complies with local and national fire, safety, and electrical codes, and voltage to the system is within the limits shown in the job-specific drawings and unit electrical data plate(s). Power supply to unit must be disconnected when making field connections. Rigorously adhere to field wiring procedures regarding proper lockout and tagout of components.

Electric Heating Table 30 - Standard Motor Electric Heat Capacities, Amps, Wire Sizing, and Over Current Protection

# Amps at unit voltage, 60Hz, single phaseNote: Unit wire sizing should be determined in accordance with NEC and local codes.* External static pressure ranges must be strictly adhered to.

WARNING

Unit T ype

AVS AVV AVR

AVV AVR

AVS AVV AVR

AVV AVR

AVS AVV AVR

AVV AVR

AVS AVV AVR

AVV AVR

C F MNumber of E lectric E lements 3 6 3 6 3 6 3 6K W 6 12 8 16 10 20 12 24MB H 20.48 40.96 27.3 54.61 34.13 68.26 40.96 81.91F inal Air T emp F (70 F entering air temp) 95.2 120.3 95.2 120.3 95.2 120.3 95.2 120.3Air T emperature R is e 25.2 50.3 25.2 50.3 25.2 50.3 25.2 50.3E lectric Heating Amperes 28.8 57.7 38.5 76.9 48.1 96.2 57.7 115.4

208-60-1 Unit Minimum C ircuit Ampacity 39.1 75.23 51.23 99.23 63.23 123.4 75.23 147.4Maximum F us e S ize or C ircuit B reaker Amps 40 80 55 100 70 130 80 150E lectric Heating Amperes 25.04 50.09 33.18 66.37 41.63 83.27 50.09 100.2





460-60-3 Unit Minimum C ircuit Ampacity 12.1 21.23 15.1 27.1 18.1 33.1 21.2 39.2Maximum F us e S ize or C ircuit B reaker Amps 15 25 20 30 20 35 25 40

of 58 IM 817-2

Electric Heating Table 31 - High Static Applications Electric Heat Capacities, Amps, Wire Sizing, and Over Current Protection

Note: Electric heat disconnect provided.

Unit T ypeAVS AVV AVR

AVV AVR

AVS AVV AVR

AVV AVR

AVS AVV AVR

AVV AVR

AVS AVV AVR

AVV AVR

C F MNumber of E lectric E lements 3 6 3 6 3 6 3 6K W 6 12 8 16 10 20 12 24MB H 20.48 40.96 27.3 54.61 34.13 68.26 40.96 81.91F inal Air T emp F (70 F entering air temp) 95.2 120.3 95.2 120.3 95.2 120.3 95.2 120.3Air T emperature R is e 25.2 50.3 25.2 50.3 25.2 50.3 25.2 50.3E lectric Heating Amperes 28.8 57.7 38.5 76.9 48.1 96.2 57.7 115.4



265-60-1 Unit Minimum C ircuit Ampacity 33.38 60.69 42.26 78.32 51.41 96.62 60.69 115Maximum F us e S ize or C ircuit B reaker Amps 35 70 45 80 55 100 70 120E lectric Heating Amperes 16.7 33.3 22.2 44.4 27.8 55.5 33.3 66.6

208-60-3 Unit Minimum C ircuit Ampacity 27.08 47.83 33.95 61.7 40.95 75.58 47.83 89.45Maximum F us e S ize or C ircuit B reaker Amps 30 50 35 70 45 80 50 90E lectric Heating Amperes 14.5 28.9 19.2 38.3 24 48.1 28.9 57.81

230-60-3 Unit Minimum C ircuit Ampacity 24.33 42.33 30.2 54.07 36.2 66.33 42.33 78.46Maximum F us e S ize or C ircuit B reaker Amps 25 45 35 55 40 70 45 80E lectric Heating Amperes 7.2 14.5 9.6 19.2 12 24 14.5 28.9

460-60-3 Unit Minimum C ircuit Ampacity 15.2 24.33 18.2 30.2 21.2 36.2 24.33 42.33Maximum F us e S ize or C ircuit B reaker Amps 20 25 20 35 25 40 25 45

IM 817-2 Page 49 of 58

14"(356mm)

5"(127 mm)

5" (127 mm)

Remove debris, dust, dirt, and any obstruction from the area in front of the return air intake grille at the floor (approximately 3' - see shaded area) as this will affect unit performance. If a draftstop system has been installed be sure that all draftstop intake grilles are unobstructed.

Figure 124 - Cabinet(s) Meeting Unit Ventilator (refer to the instructions specific to the installation, included with the cabinets).

Draftstop™ System/Window Down-draft Installation Windowdown-draftprotectionisrecommendedforclassroomswherethefollowingconditionsexist:

1. Windowareaexceeds40%ofthetotaloutsidewallarea.2. Single-paneglassisused.3. Outsidetemperaturesarebelow35oF for a significant portion of

theoccupiedperiod.

The need for window down-draft protection will not always be soclearcut.Whereuncertaintyexists,afurthercheckcanbemadebycalculatingthewindowheatlossatanoutdoortemperatureof35oF.Ifestimatedwindowheatlossexceeds250BTUH/FT,windowdown-draftprotectionisrecommended.Ifestimatedwindowheatlossislessthan250BTUH/FT,theneedfordown-draftprotectionismarginalbutshouldnotbearbitrarilydismissed.

The “DraftStop” system can be employed even in those marginal applications to provide the occupants comfort without the materialinstallation and operating cost penalty associated with “auxiliaryradiation.” The unit ventilator is ordered with the return air intake having a draftstop blockoff to restrict return air flow through the front bottom unit opening, option “30” in field “11” of the model number. This allows drawingof returnair through thedraftstopenclosure locatedunderthewindows.Amanuallyadjustabledamperislocatedbeneatheachsection of DraftStop grille, see figure 128 on page 50. This damper is providedsothatauniformairvelocitycanbeachievedthroughouttheentirelengthoftheDraftStopgrille.Thissimpleadjustmentismadeonce by the installer during the final stage of installation.

Falling Cold Airfrom Window

Figure 125 - DraftStop System Concept

Table 30. DraftStop Grille Length

Figure 127 - Typical Finned Radiation Enclosure (left) And Typical DraftStop Enclosure (right)

Outdoor Air Intake Opening

Figure 126 - Unit Back Showing knockouts for DraftStop Applications

End compartment Draftstop knockouts must be removed for proper Draftstop operation. (21-7/8" units only)

Cabinets

20" High DraftStop Wall Enclosure

24" High DraftStop Wall Enclosure or Storage CabinetsUnit

Nom. CFM

Minimum Length (Ft.) Each Side

Maximum Length (Ft.) Each Side

Minimum Length (Ft.) Each Side

Maximum Length (Ft.) Each Side

750

1000

1250

1500

3

4

5

6

13

18

22

25

3

4

5

6

22

30

36

42

NOTICE

of 58 IM 817-2

Draftstopismadeupofthreeseparatesectionsaslistedbelow:

1. Upperchannelorbackplate2. Mountingcomponents3. Enclosuresandtrims

Items1,and2arematerialswhichwillberequiredtostarttheinstallation.Item3isthecompletionmaterialandshouldbestoredinasafeareauntilneeded.Thefollowingstep-by-stepproceduresshouldbeadheredto:

1. Checktheareainwhichtheequipmentistobeinstalledandclearawaythedebris.

2. Review the engineered floor plans or the approved equipment roomschedule.

3. Placetheproperamountofequipmentineachareainaccordancewithplansorschedule.

4. Proceedtoinstalltheequipmentasoutlinedonthefollowingpages.RefertotheinstallationinstructionsincludedwiththeDraftstopsystemformoredetailedinformation.

Upper Channel or Backplate Assembly1. Establish a level chalk line on the wall at a height specified for the

topoftheenclosure.Selectmountinghardwarewhichissuitableforthetypeofwallconstructionusedandmounttheupperchannelor backplate flush with the chalk line. When mounting, use the prepunched holes and push the hardware through the spongegasket.

Note:a. Theupperchannelisprovidedwithcontinuous5/16" diameterholeson2"centersformounting.b. Whereused,thebackplateassemblyconsistsofafullbackplate

weldedtothebackoftheupperchannel.Fastenthebackplateatthebottomaswellasatthetop.

2. Wall-to-WallApplication:Startingattheleftside,runtheupperchannelorbackplatealongthewall.Notethattheupperchannelorbackplateisinstalledbehindthewalltrimaswellastheenclosure,becauseboththeenclosureandwalltrimrestinthetopgrooveoftheupperchannel.

3. Wall-to-EndApplication:Runtheupperchannelorbackplatefromthewalltoapointwheretheenclosurewillend.SeeDraftstopinstallationinstructionsfordetailsofendcapinstallation.

4. End-to-EndApplication:Runtheupperchannelorbackplatethesamelengthastheenclosure.SeeDraftstopinstallationinstructionsfordetailsorendcapinstallation.

5. Forinsidecorners,runtheupperchannelorbackplateintothecorner, butting the pieces together. If desired, pieces may bestoppedshortofthecorneramaximumofoneinch.RefertotheDraftstopinstallationinstructionsfordetailsof thecorner triminstallation.

The Draftstop enclosure and unit ventilator end panel should bematched, to ensure proper airflow. Tables 31-34 show the various end panels available, follow installation instructions included with theendpanels.

NOTICEThe following information is a general outline for installing the Draftstop system. Refer to the specific installation instructions provided with the Draftstop system equipment.

Draftstop Bar Grille and Adjustable Damper

Piping Area

Figure 128 - Typical DraftStop Enclosure

AllDimensionsinInches

165/8"(422mm)DeepEndPanels

217/8"(556mm)DeepEndPanels

TopView

EndViewWith4"x18"

(102mmx457mm)Cut-out

EndViewWith21/2"x7"

(64mmx178mm)Cut-out

EndViewWithNoCut-out

EndViewWith4"x22"


EndViewWith2"x51/4"

(51mmx133mm)

StepDown

Table 31. 1" (25mm) End Panel Dimensions – Floor Unit Ventilators

27 7/8"(708mm)

27 7/8"(708mm)

7"(178mm)

2 1/2"(64mm)

1"(25mm)

27 7/8"(708mm)

18"(457mm)

4"(102mm)

1"(25mm)

27 7/8"(708mm)

22"(559mm)

4"(102mm)

1"(25mm)

16 5/8"(422mm) 1"

(25mm)

27 7/8"(708mm)

27 7/8"(708mm)

7"(178mm)

2 1/2"(64mm)

1"(25mm)

27 7/8"(708mm)

18"(457mm)

4"(102mm)

1"(25mm)

27 7/8"(708mm)

22"(559mm)

4"(102mm)

1"(25mm)

21 7/8"(556mm) 1"

(25mm)

27 7/8"(708mm)

2"(51mm)

5 1/4"(133mm)

IM 817-2 Page 51 of 58

Installing Unit Ventilator End Panels:See Figure 131.Accessory end panels are shipped separately withhardwareandkickplate,orsimulatedkickplateadhesivetapeusedon165/8"units(only).Aligneachendpanelwiththetopandfrontedgesoftheunitventilator.Attacheachendpaneltotheunitventilatorusingthehardwareprovided.

1"ENDPANEL

277/8"(708mm)

30"(762mm)

28"(711mm)DeepEndPanels

Table 32. 1" (25mm) End Panel Dimensions – Non-Standard 28" Deep Floor Unit Ventilators

TopView16 5/8"

(422mm) 6"(152mm)

21 7/8"(556mm) 6"

(152mm)

Table 33. 6" (152mm) End Panel Dimensions – Floor Unit Ventilators


27 7/8"(708mm)

AllDimensionsinInches

TopView

EndViewWith4"x18"


EndViewWith21/2"x7"

(64mmx178mm)Cut-out


EndViewWith4"x22"


EndViewWith2"x51/4"

(51mmx133mm)

StepDown

TopView28"

(711mm) 6"(152mm)


Table 34. 6" (152mm) End Panel Dimensions – 28" Non-Standard Floor Unit Ventilators

Floor

Figure 129 - Typical DraftStop Enclosure

MountingChannelDetail

Open

3⁄8" (10mm) Max. Screw (By Others)

11⁄4" (32mm)

2" (51mm)

Enclosure

SlideClosed

12" (305mm),

20" (508mm)

& 24" (610mm)

53⁄8"31⁄8"

27 7/8"(708mm)

27 7/8"(708mm)

22"(559mm)

4"(102mm)

1"(25mm)

28"(711mm) 1"

(25mm)

27 7/8"(708mm)

27 7/8"(708mm)

Finned Radiation SystemFinnedradiationdown-draftcontrolisavailableforthosewhopreferit.Madeoffurniture-qualitysteelanddesignedtocomplementtheunitventilatorstyling,itisparticularlyappropriateforabuildingwithverylargeexpansesofwindowwheretheDraftStopsystemisnotused,andforuseinotherpartsofthebuilding.

Figure 130 - Typical Finned Radiation Piping

Control – Hydronic Radiation

Auxiliary Radiation Auxiliary Radiation

Unit VentilatorCoil

Unit Ventilator Control Valve*(controlled by MicroTech II)

Radiation Control Valve(controlled by MicroTech II)

*Not required with Face & Bypass control

Figure 131 - Install End Panels

of 58 IM 817-2

Oiling the Fan Shaft End Bearing:

Do not attempt to operate the unit fans until the fan bearings have been oiled. Oiled bearings provide smooth, and quiet operation of the fan system.

End Panel

YC-1934

End

of U

nit

1/4-20 Tinnerman Nut, Clip on End Panel

1/4-20 x 1/2 Screw & 1/4 Flat Washer

1/4-20 Tinnerman Nut, Clip Over Lower Hole in Unit Corner Angle.

1/4-20 x 1/2 Screw & 1/4 Flat Washer

5" Unit Ventilator Start-up

1. Before proceeding inspect the fan system, ensure all parts arealignedproperlyandmovefreely.Inspectfansandfandischargearea for obstructions. Rotate fan manually. Check that a clean filter isinstalledandareainfrontofunitventilatorisfreeofdebris(seefigure 124). All panels should be in place and properly fastened. Checkforoutdoorairleaksandcondensation.Ensurethecoilsectionisproperlysealedusingtheinsulatingfoamdonutssupplied.

2. Aftertheunitventilatorhasbeenproperlyinstalled,activateunitelectrical power and applicable chilled water/hot water/steam/refrigerantsystems.

3. Usingtheapplicablecontrol,activatetheunitventilator.Dependingon the operating mode selected, the dampers, fans, and othercomponentsshouldoperateasneeded.

4. Runtheunitventilatorfortenminutes,listeningandobserving.Fans should be operating correctly, and rotating in the properdirection,withoutunusualnoise.Likewise,theunitshouldbefreeofsheetmetalrattlesand/orunusualnoises.Allpanelsshouldbeinplaceandproperlyfastened,andcheckedforairleaksandcondensation.

Remove debris, dust, dirt, and any obstruction from the area in front of the return air intake grille at the floor as this will affect unit performance. If a draftstop system has been installed be sure that all draftstop intake grilles are unobstructed.

SeeFigure134foroilingpoint.Accesstofanshaftbearingisthroughlefttopaccessdoor.Lifttheoilercap.Oil,usingafewdropsofhighgradeSAE20or30nondetergentoil.Donotover-oil.

G.E. motor manufacturer recommends not oiling the fan motor .

Access To Fan Shaft Bearing Through Left Top Access Door

Figure 134 - Oiling Point

Bearing Oiler Cap

Prepare Unit Ventilator(s) for Start-up

Tinnerman Clips

Tinnerman Clips

Screws (insert through end panel and thread into tinnerman clips on unit subbase)

Screws (insert through upper mounting holes inside unit end compartment, and thread into tinnerman clips on end panel)

End Panel w/Cut out

Figure 132 - Install End Panels With Provided Hardware (1" End Panel Shown)

1. Position(YC-1934)bracketonwallsoangleis5"fromendofunitand near bottom (see figure 133).

2. Markanddrillrequiredholeforfasteningdevice(notincluded).3. Attachbrackettowall.4. Attachendpanel.Bracketshouldpreventmovementofendpanel

towardendofunitwhenpressureisappliedtoendpanel,readjustbracketifnecessary.

Figure 133 - Install End Panels With Provided Hardware (6" End Panel Shown)

CAUTION

NOTICE

NOTICE

IM 817-2 Page 53 of 58

Units must have a filter installed when operating. Operation without a filter can compromise unit performance due to build up of dust and dirt on components.

Filter(s)

Turnoff theunit, (fanspeedswitchoruniton/offswitchis locatedbehind the right front end compartment panel). Remove the centerfront panel, pull out the filter and replace with a clean filter. Replace thecenterpanelandrestarttheunit.

Filters should be replaced during the first week of placing into service topreventdirtcarry-overintotheinternalsoftheunitandbackintothe classroom, (see figure 135). A periodic filter changeout program should be established. Filters should be checked monthly or moreoften ifconditions indicate.Filtersare included inallunits.AAF®-HermanNelson® single-use filters are standard on all but electric heat units, which come with permanent wire mesh filters. Permanent wire mesh and renewable media filters are available for non-electric heat units, in lieu of single-use filters.

• Single-usefiltersfeatureAmerglasmedia.Theyaredesignedtobeusedonceanddiscarded.

• Permanentfiltersare metal filters that may be removed for cleaning andreusednumeroustimes.

• Renewablemediafilters (figure 134) consist of a heavy painted metalstructuralframeandrenewableAmerglasmedia.

Turn off unit before servicing to avoid danger of injury from rotating fans.

Dirty or clogged filters can impact unit performance, resulting in damage to the unit.

12" Left Front Access Panel

Motor

12" Right Front Access Panel

Top Access Doors

Figure 135 - Filter installation

Complete Check, Test and Start Procedure (Included in the shipping envelope in the end compartment oftheunit).ProvidecompletedCheck,TestandStartproceduretolocalAAF®-HermanNelson® representative and to specifying engineer toverifyproperstart-upwascompleted.

Electric heat units should ONLY use permanent wire mesh filters. Filters other than wire mesh are not intended for electric heat units, and can cause unit damage, property damage or personal injury.

Filter

Renewable Media (Single-use And Permanent Wire Mesh Filters Also Available.)

Structural Frame

Installer/Owner’s ResponsibilityProtect your investment - read carefully

YourAAF-HermanNelsonexpresswrittenlimitedwarrantydoesnotcoverequipmentfailuresthatarecausedbymisuse,abuse,mis-installation,failuretomaintaintheunit,etc.So,forexample,thefollowingdamageisnotcoveredbywarranty:

1. Progressivedamagetomachinefromfailuretocheckandtestatstart-up.

2. Damageresulting fromhandlingduring installationordamageresultingfromtransportation.

3. Incorrect or fluctuating power supply.4. Damageresultingfromfailuretokeepevaporatorcoilandintake

clean.5. Damageresultingfromfreezingwaterorcondensate,inadequate

orinterruptedwatersupply,useofcorrosivewater,rearrangementofunitpipingsystem,foulingorrestrictionofthewatercircuitbyforeignmaterial.

6. Inaccessibilityofunitforserviceorpartsinstallationthatpreventsproperequipmentoperation.

7. Damageresultingfromtheuseoftheunitinacorrosiveatmosphere,ie.,cleaningmaterials,fumes,etc

8. Damage caused by not cleaning or replacing filters.9. Damage caused by accident, alteration of unit design, or

tampering.

PleasecompleteandreturntheCheck,TestandStartdocumentimmediatelytoprotectyourwarranty.

CAUTION

CAUTION

CAUTION

CAUTION

©2007 McQuay International • www.mcquay.com • 800-432-1342

IM 817-2 (12-07)

®

McQuayTrainingandDevelopment

Now that you have made an investment in modern, efficient McQuay equipment, its care should be a high priority. For training information on all McQuay HVAC products, please visit us at www.mcquay.com and click on training, or call 540-248-9646 and ask for the Training Department.

WarrantyAll McQuay equipment is sold pursuant to its standard terms and conditions of sale, including LimitedProduct Warranty. Consult your local McQuay Representative for warranty details. Refer to Form933-43285Y. To find your local McQuay Representative, go to www.mcquay.com.

This document contains the most current product information as of this printing. For the most up-to-dateproduct information, please go to www.mcquay.com.

Manufactured in an ISO Certified Facility

aaf -hermannelson classroom unit ventilators...aaf®-hermannelson® classroom unit ventilators...

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