part number: 92-102421-01-00 maverick i™ date: march ......ill i301 figure 8: package air...
TRANSCRIPT
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© 2007 McQuay International
Maverick I™Commercial Packaged Rooftop SystemCooling Only or Heating & CoolingElectric/ElectricModels MPS003AY – 005AY3 to 5 Tons
Installation and Maintenance Manual IM 864
Group: Applied Systems
Part Number: 92-102421-01-00
Date: March 2007
ARI Standard210/240 UAC
™
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2 IM 864
Table of ContentsTable of Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Checking Product Received . . . . . . . . . . . . . . . . . . . . 3Equipment Protection . . . . . . . . . . . . . . . . . . . . . . . . . 3Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Pre-Installation Check Points . . . . . . . . . . . . . . . . . . . . . . . . 6
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Outside Slab Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Rooftop Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Ductwork. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Conversion Procedure . . . . . . . . . . . . . . . . . . . . . . . . 8Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Electrical Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Control Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Internal Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
208 Volt Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Grounding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Indoor Air Flow Data . . . . . . . . . . . . . . . . . . . . . . . . . 10Crankcase Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Pre-Start Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Auxiliary Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Control System Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Replacement Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . 12Charge Information . . . . . . . . . . . . . . . . . . . . . . . . . . 12Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12General Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-14
Miscellaneous. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Airflow Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-19
Heater Kit Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-24
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25-27
Charge Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28-30
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
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IM 864 3
IntroductionThis manual contains the installation and operating instruc-tions for your packaged rooftop unit. There are a few precau-tions that should be taken to derive maximum satisfactionfrom it. Improper installation can result in unsatisfactory oper-ation or dangerous conditions.Read this manual and any instructions packaged with separateequipment required to make up the system prior to installation.Give this manual to the owner and explain its provisions. Theowner should retain this manual for future reference.
Checking Product ReceivedUpon receiving the unit, inspect it for any damage from ship-ment. Claims for damage, either shipping or concealed, shouldbe filed immediately with the shipping company. Check theunit model number, electrical characteristics, and accessoriesto determine if they are correct.
Equipment Protection From TheEnvironmentThe metal parts of this unit may be subject to rust or deteriora-tion in adverse environmental conditions. This oxidation couldshorten the equipment’s useful life. Salt spray, fog or mist inseacoast areas, sulphur or chlorine from lawn watering sys-tems, and various chemical contaminants from industries suchas paper mills and petroleum refineries are especially corro-sive.If the unit is to be installed in an area where contaminantsare likely to be a problem, special attention should begiven to the equipment location and exposure.
1 Avoid having lawn sprinkler heads spray directly on theunit cabinet.
2 In coastal areas, locate the unit on the side of the buildingaway from the waterfront.
3 Shielding provided by a fence or shrubs may give someprotection.
Regular maintenance will reduce the buildup of contami-nents and help to protect the unit’s finish.
1 Frequent washing of the cabinet, fan blade and coil withfresh water will remove most of the salt or other contami-nants that build up on the unit.
2 Regular cleaning and waxing of the cabinet with a goodautomobile polish will provide some protection.
3 A good liquid cleaner may be used several times a year toremove matter that will not wash off with water.
Several different types of protective coatings are offered insome areas. These coatings may provide some benefit, but theeffectiveness of such coating materials cannot be verified bythe equipment manufacturer.The best protection is frequent cleaning, maintenance andminimal exposure to contaminants.
The manufacturer’s warranty does not cover any damage ordefect to the air conditioner caused by the attachment oruse of any components, accessories or devices (other thanthose authorized by the manufacturer) into, onto or in con-junction with the air conditioner. You should be aware thatthe use of unauthorized components, accessories ordevices may adversely affect the operation of the air condi-tioner and may also endanger life and property. The manu-facturer disclaims any responsibility for such loss or injuryresulting from the use of such unauthorized components,accessories or devices.
▲▲DANGER!
Recognize this symbol as an indication ofImportant Safety Information!!
Proposition 65: This unit contains fiberglass insulation.Respirable particles of fiberglass are known to the state ofCalifornia to cause cancer.
▲▲WARNING!
Disconnect all power to the unit before starting mainte-nance. Failure to do so can result in severe electrical shockor death.
▲▲DANGER!
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4 IM 864
Figure 1: Unit Dimensions – Bottom View
Figure 2 : Unit Dimensions
ILL 1316
ILL1305
2
2 2
2
9.56
44.13
4.5 4.5
2.25
72.25
14.44
3.25
RETU
RN
AIR
SUPP
LY
AIR
20
20
13.13
13.13
4.63
ELECTRIC HEAT ACCESS
COMPRESSOR/CONTROL BOX
ACCESS
24.25
18.19
11.13
7.22
46.5
75.5
35
CONTROL ENTRY
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5IM 864
Figure 3: Unit Dimensions
Figure 4: Unit Dimensions – Back View
ILL 1304
ILL 1288
SUPPLY COVER
31.22
3.81
76.31
47.09
5.34
24RETURN COVER/OPTIONAL OUTDOORAIR HOOD LOCATION
CONDENSATE DRAIN3/4” NPT FEMALE
BLOWERACCESS
COIL/FILTERACCESS
76.25
12.25 5.5 19.13
6.84
13.72
12.25
35
4.94
19.13
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6 IM 864
InstallationGeneral
1 PRE-INSTALLATION CHECK-POINTSBefore attempting any installation, the following pointsshould be carefully considered:a Structural strength of supporting members.
(rooftop installation)b Clearances and provision for servicing.c Power supply and wiring.d Air duct connections.e Drain facilities and connections.f Location for minimum noise.
2 LOCATIONThese units are designed for outdoor installations. Theycan be mounted on a slab or rooftop. They are not to beinstalled within any part of a structure such as an attic,crawl space, closet, or any other place where condenserair flow is restricted or other than outdoor ambient condi-tions prevail. Since the application of the units is of theoutdoor type, it is important to consult your local codeauthorities at the time the first installation is made.
Outside Slab Installation(Typical outdoor slab installations are shown in Figures 5 and6.)
1 Select a location where external water drainage cannotcollect around the unit.
2 Provide a level concrete slab extending 3" beyond all foursides of the unit. The slab should be sufficient above
grade to prevent ground water from entering the unit.IMPORTANT: To prevent transmission of noise or vibration,slab should not be connected to building structure.
3 The location of the unit should be such as to provideproper access for inspection and servicing.
4 Locate unit where operating sounds will not distrubowner or neighbors.
5 Locate unit so roof runoff water does not pour directly onthe unit. Provide gutter or other shielding at roof level.Do not locate unit in an area where excessive snow drift-ing may occur or accumulate.
6 Remove compressor shipping supports (if so equipped)after installation.
ClearancesThe following minimum clearances must be observed forproper unit performance and serviceability.
1 Provide 48" minimum clearance at the front of the unit.Provide 36" minimum clearance at the left and right sideof the unit for service access.
2 Provide 60" minimum clearance between top of unit andmaximum 3 foot overhang.
3 Unit is design certified for application on combustibleflooring with 0" minimum clearance.
4 See Figure 5 for illustration of minimum installation-ser-vice clearances.
Rooftop Installation1 Before locating the unit on the roof, make sure that the
strength of the roof and beams is adequate at that point to
ILL I308
Figure 5: Outside slab installation, basement or crawlspace distribution system
18”
12”
*Allow 57" foreconomizer on duct side.
*
Figure 6: Outside slab installation, closet distribution sys-tem. Slab floor construction.
ILL I309
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IM 864 7
support the weight involved. (See specification sheet forweight of unit.) This is very important and user’s respon-sibility.
2 For rigging and roofcurb details, see Figures 7 and 8. Usefield-furnished spreaders.
3 For roofcurb assembly, see Roofcurb Installation Instruc-tions.
4 If the roofcurb is not used, provisions for disposing ofcondensate water runoff must be provided.
5 The unit should be placed on a solid and level roofcurb orplatform of adequate strength. See Figure 9.
6 The location of the unit on the roof should be such as toprovide proper access for inspection and servicing.
7 Remove compressor shipping supports (if so equipped)after installation.
IMPORTANT: If unit will not be put into service immediately,cover supply and return openings to prevent excessive conden-sation.
ILL I296
A
B
D
C
38.25
CENTEROFGRAVITY25.75
Figure 7: Package air conditioner – rigging for lifting
CORNER WEIGHTS BY PERCENTAGE
A B C D
23% 27% 23% 27%
ILL I300
ILL I301
Figure 8: Package air conditioner – roofcurb installation
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8 IM 864
Ductwork
Ductwork should be fabricated by the installing contractor inaccordance with local codes and NFPA90A. Industry manualsmay be used as a guide when sizing and designing the ductsystem - contact Air Conditioning Contractors of America,1513 16th St. N.W., Washington, D.C. 20036.
The unit should be placed as close to the space to be air condi-tioned as possible allowing clearance dimensions as indicated.Ducts should be run as directly as possible to supply andreturn outlets. Use of non-flammable waterproof flexible con-nectors on both supply and return connections at the unit toreduce noise transmission is recommended.
It is preferable to install the unit on the roof of the structure ifthe registers or diffusers are located on the wall or in the ceil-ing. A slab installation could be considered when the registersare low on a wall or in the floor.
On ductwork exposed to outside air conditions of temperatureand humidity, use a minimum of 2" of insulation and a vaporbarrier. Distribution system in attic, furred space or crawlspace should be insulated with at least 2" of insulation withvapor barrier. One-half to 1" thickness of insulation is usuallysufficient for ductwork inside the air conditioned space.
Balancing dampers should be provided for each branch duct inthe supply system. Ductwork should be properly supportedfrom the structure.
When installing ductwork, consider the following items:
1 Noncombustible flexible connectors should be usedbetween ductwork and unit to reduce noise and vibrationtransmission into the ductwork.
2 When auxiliary heaters are installed, use noncombustibleflexible connectors and clearance to combustible materialof 0" for the first 3 feet of discharge duct. Clearance tounit top and side is 0".
FiltersThis unit is provided with 2 - 25" x 16" x 1" disposable fil-ters. When replacing filters, ensure they are inserted fully tothe back to prevent bypass.
Conversion ProcedureDownflow To Horizontal
1 Remove the screws and covers from the outside of thesupply and return sections.
2 Install the covers in the bottom supply and return open-ings with the painted side up. See Figure 10. Use theexisting gasket to seal the covers.
3 Secure the supply cover to the base of the unit with 1screw, engaging prepunched tab in unit base.
4 Secure the return cover to the base of the unit withscrews, engaging prepunched holes in the unit base.
Condensate DrainThe condensate drain connection of the evaporator is 3/4"nominal female pipe thread. IMPORTANT: Install a condensatetrap to ensure proper condensate drainage. See Figure 11.
Figure 9: Flat rooftop installation, attic or drop ceiling dis-tribution system. Mounted on roofcurb. Curb must belevel.
ILL I310
Figure 10: Cover gasket detail
ILL I631
Figure 11: Condensate Drain
Do not, under any circumstances, connect return ductworkto any other heat producing device such as a fireplaceinsert, stove, etc. Unauthorized use of such devices mayresult in fire, carbon monoxide poisoning, explosion, proper-ty damage, severe personal injury or death.
▲▲DANGER!
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IM 864 9
Electrical WiringField wiring must comply with the National Electrical Code*and local ordinances that may apply.*C.E.C. in Canada
Power Wiring1 It is important that proper electrical power is available at
the unit. Voltage should not vary more than 10% fromthat stamped on the unit rating plate. On three phaseunits, phases must be balanced within 3%.
2 Install a branch circuit disconnect within sight of the unitand of adequate size to handle the starting current.Reference Figure 12 for proper location.
3 For branch circuit wiring (main power supply to unit dis-connect), the minimum wire size can be determined fromTable A using the circuit ampacity found on the unitnameplate.
4 This unit incorporates single point electrical connectionfor unit and electric heat accessory.
5 Power wiring must be run in grounded rain-tight conduit.Connect the power field wiring as follows:a NO ELECTRIC HEAT - Connect the field wires
directly to the contactor pigtail in the electric heataccess area. Connect ground wire to ground lug.
b WITH ELECTRIC HEAT - Connect the field wires tothe terminal block on the electric heater kit in the elec-tric heat access area. Connect the ground wire to theground lug on the heater kit.
NOTE: For field installation of a heater kit, follow the instructionsprovided with the heater kit.
6 The pigtail wires in the electric heat access area are facto-ry wired to the contactor in the control box.
7 DO NOT connect aluminum field wires to electric heatkit power input terminals.
WARRANTY WILL BE VOIDED IF CONNECTIONS ARENOT MADE PER INSTRUCTIONS
Control Wiring (Class II)1 Low voltage wiring should not be run in conduit with
power wiring.2 Control wiring is routed through the 7/8" hole adjacent to
the compressor access panel. See Figure 2. Use a mini-mum #18 AWG thermostat wire. For wire lengthsexceeding 50', use #16 AWG thermostat wire. The lowvoltage wires are connected to the unit pigtails which aresupplied with the unit in the low voltage connection boxlocated below the unit control box.
3 Figure 14 shows representative low voltage connectiondiagrams. Read your thermostat installation instructionsfor any special requirements for your specific thermostat.NOTE: Units installed in Canada require that an outdoorthermostat (30,000 min. cycles of endurance) be installedand be wired with C.E.C. Class I wiring.
COPPER WIRE SIZE — AWG (1% VOLTAGE DROP)30025020015010050
SupplyWire
LengthFeet
Circuit Ampacity
NOTE:1. Wire size based on 60ºC type copper conductors below 100 ampacity. 2. Wire size based on 75ºC type copper conductors for 100 ampacity and above.
4468
1014
15
34468
12
20
23468
10
25
23446
10
30
123468
35
1/012468
40
1/012346
45
2/01/01346
50
2/01/01246
55
3/02/01/0234
60
3/02/01/0134
65
3/02/01/0124
70
4/03/02/01/023
75
4/03/02/01/023
80
4/03/02/01/013
85
4/04/03/01/012
90
2504/03/02/012
95
2504/03/02/012
100
2504/03/02/012
105
2504/03/02/01/02
110
3002504/02/01/01
115
3002504/03/01/01
120
3002504/03/01/01
125
3002504/03/01/01
130
3002504/03/01/01/0
135
3503503004/01/01/0
140
3503503004/02/01/0
145
3503503004/02/01/0
150
3503503004/02/02/0
155
Table A
Figure 12: Recommended location of branch circuitdisconnect
TO POWER
BRANCH CIRCUIT DISCONNECT
TO CONTROL
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10 IM 864
Internal WiringIMPORTANT: Some single phase models are equipped with asingle pole contactor. Caution must be exercised when servicingas only one leg of the power supply is broken with the contactor.
Some models are equipped with electronically commutated blow-er motors which are constantly energized unless the main unitdisconnect is in the off position.
1 A diagram of the internal wiring of this unit is located onthe inside of the compressor access panel. If any of theoriginal wire as supplied with the unit must be replaced,the wire gauge and insulation must be the same as origi-nal wiring.
208 Volt ApplicationsTransformer is factory-wired for 220 volts on 200/220 voltmodels and must be changed for 200-volt applications. Seeunit wiring diagram for 200-volt wiring.
Grounding
ThermostatThe thermostat should be mounted on an inside wall aboutfive feet above the floor in a location where it will not beaffected by unconditioned air, sun, or drafts from open doorsor other sources. READ installation instructions in thermostatpackage CAREFULLY because each has some different
wiring requirements. The low voltage wiring should be sizedas shown in Table B.Install the room thermostat in accordance with the instructionsheet packed in the box with the thermostat.
Indoor Air Flow DataDirect-drive blower models are shipped factory wired for theproper speed at a typical external static. See BlowerPerformance Data. Belt-drive blower models have motorsheaves set for proper CFM at a typical external static.
Crankcase Heat (Optional)Crankcase heat is not required on scroll type compressors, butmay be necessary for difficult starting situations.
Pre-Start Check1 Is unit properly located and slightly slanted toward
indoor condensate drain?2 Is ductwork insulated, weatherproofed, with proper
spacing to combustible materials?3 Is air free to travel to and from outdoor coil? (See Figure
5.)4 Is the wiring correct, tight, and according to unit wiring
diagram?5 Is unit grounded?6 Are field supplied air filters in place and clean?7 Do the outdoor fan and indoor blower turn freely with-
out rubbing, and are they tight on the motor shafts?8 Are the compressor shipping supports removed (if so
equipped)?
Startup1 Turn thermostat to “OFF,” turn “on” power supply at
disconnect switch.2 Turn temperature setting as high as it will go.3 Turn fan switch to “ON.”4 Indoor blower should run. Be sure it is running in the
right direction.5 Turn fan switch to “AUTO.” Turn system switch to
“COOL” and turn temperature setting below room tem-perature. Unit should run in cooling mode.
6 Is outdoor fan operating correctly in the right direction?
ILL I312
Figure 13: Heater Kit Installation
The unit must be permanently grounded. A grounding lug isprovided in the electric heat kit access area for a groundwire. Failure to ground this unit can result in fire or electricalshock causing property damage, severe personal injury ordeath.
▲▲DANGER!
Table B
FIELD WIRE SIZE FOR 24 VOLT THERMOSTAT CIRCUITS
SOLID COPPER WIRE - AWG.
3.0 16 14 12 10 10 102.5 16 14 12 12 12 102.0 18 16 14 12 12 10
50 100 150 200 250 300Length of Run – Feet (1)T
her
mo
stat
Lo
ad -
Am
ps
(1) The total wire length is the distance from the furnace to the thermo-stat and back to the furnace.NOTE: DO NOT USE CONTROL WIRING SMALLER THAN NO. 18AWG.
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11IM 864
7 Is compressor running correctly.8 Check the refrigerant charge using the instructions locat-
ed on compressor access panel. Replace service portcaps. Service port cores are for system access only andwill leak if not tightly capped.
9 Turn thermostat system switch to proper mode “HEAT”or “COOL” and set thermostat to proper temperature set-ting. Record the following after the unit has run sometime.a Operating Mode______________________________b Discharge Pressure (High) _________________PSIGc Vapor Pressure at Compressor (Low)_________PSIGd VaporLine Temperature at Compressor _________°F.e Indoor Dry Bulb ___________________________°F.f Indoor Wet Bulb ___________________________°F.g Outdoor Dry Bulb__________________________°F.h Outdoor Wet Bulb__________________________°F.i Voltage at Contactor ______________________Voltsj Current at Contactor______________________Ampsk Model Number_______________________________l Serial Number _______________________________
m Location ____________________________________
n Owner _____________________________________
o Date _______________________________________
10 Adjust discharge air grilles and balance system.
11 Check ducts for condensation and air leaks.
12 Check unit for tubing and sheet metal rattles.
13 Instruct the owner on operation and maintenance.
14 Leave “INSTALLATION” and ”USE AND CARE“ instruc-tions with owner.
OperationMost single phase units are operated PSC (no start relay orstart capacitor). It is important that such systems be off for aminimum of 5 minutes before restarting to allow equalizationof pressures. The thermostat should not be moved to cycle unitwithout waiting five minutes. To do so may cause the com-pressor to stop on an automatic open overload device or blowa fuse. Poor electrical service can cause nuisance tripping inoverloads or blow fuses.
IMPORTANT: The compressor has an internal overload protec-tor. Under some conditions, it can take up to 2 hours for thisoverload to reset. Make sure overload has had time to resetbefore condemning the compressor.
Some units are equipped with a time delay control (TDC1).The control allows the blower to operate for up to 60 secondsafter the thermostat is satisfied.
Figure 14: Low Voltage Connections Diagrams
STANDARD CONTROL WIRING
R
W
G
Y
Y2
C
RED
BLACK
GRAY
YELLOW
ORANGE
BROWN
THERMOSTATSUB-BASE
UNIT CONTROLSWIRE PIGTAILS
NOTE: Y2 IS ONLY USED WITH OPTIONAL ECONOMIZER.
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12 IM 864
Auxiliary Heat
Control System Operation1 In the cooling mode, the thermostat will, on a call for
cooling, energize the compressor contactor and the indoorblower relay. The indoor blower can be operated continu-ously by setting the thermostat fan switch at the “ON”position.
2 In the heating mode, the thermostat will energize one ormore supplementary resistance heaters.
Replacement PartsTo find your local McQuay Certified Parts Distributor, go towww.mcquay.com and select Parts Locator.
Charge InformationRefer to the appropriate charge chart included in this manual.
TroubleshootingRefer to the troubleshooting chart included in this manual.
Wiring DiagramsRefer to the appropriate wiring diagram included in this manu-al.
Only electric heater kits supplied by this manufacturer asdescribed in this publication have been designed, tested,and evaluated by a nationally recognized safety testingagency for use with this unit. Use of any other manufacturedelectric heaters installed within this unit may cause haz-ardous conditions resulting in property damage, fire, bodilyinjury or death.
▲▲DANGER!
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13IM 864IM 864
General DataNominal Sizes 3-5 Tons [10.6-17.6 kW] ASHRAE 90.1-2004 Compliant Models
McQuay MPS Series 003AYCK 003AYDK 004AYCK 004AYDKCooling Performance1
Gross Cooling Capacity Btu [kW] 37,400 [10.96] 37,400 [10.96] 49,000 [14.36] 49,000 [14.36]EER/SEER2 11.7/13 11.7/13 11.4/13.1Nominal CFM/ARI Rated CFM [L/s] 1200/1200 [566/566] 1200/1200 [566/566] 1600/1550 [755/731] 1600/1550 [755/731]ARI Net Cooling Capacity Btu [kW] 36,000 [10.55] 36,000 [10.55] 47,000 [13.77] 47,000 [13.77]Net Sensible Capacity Btu [kW] 26,400 [7.74] 26,400 [7.74] 33,600 [9.84] 33,600 [9.84]
Net System Power kW 3.08 3.08 4.15 4.15
Net Weight lbs. [kg] 543 [246] 543 [246] 580 [263] 580 [263]
CompressorNo./Type 1/Scroll 1/Scroll 1/Scroll 1/Scroll
Outdoor Sound Rating (dB)4 78 78 78 78Outdoor Coil—Fin Type Louvered Louvered Louvered LouveredTube Type Rifled Rifled Rifled RifledTube Size in. [mm] OD 0.375 [9.5] 0.375 [9.5] 0.375 [9.5] 0.375 [9.5]Face Area sq. ft. [sq. m] 16.91 [1.57] 16.91 [1.57] 16.56 [1.54] 16.56 [1.54]Rows / FPI [FPcm] 1 / 22 [9] 1 / 22 [9] 2 / 22 [9] 2 / 22 [9]
Net Latent Capacity Btu [kW] 9,600 [2.81] 9,600 [2.81] 13,400 [3.93] 13,400 [3.93]
Indoor Coil—Fin Type Corrugated Corrugated Corrugated CorrugatedTube Type Rifled Rifled Rifled RifledTube Size in. [mm] 0.375 [9.5] 0.375 [9.5] 0.375 [9.5] 0.375 [9.5]Face Area sq. ft. [sq. m] 5.17 [0.48] 5.17 [0.48] 5.17 [0.48] 5.17 [0.48]Rows / FPI [FPcm] 2 / 17 [7] 2 / 17 [7] 3 / 15 [6] 3 / 15 [6]Refrigerant Control TX Valves TX Valves TX Valves TX ValvesDrain Connection No./Size in. [mm] 1/0.75 [19.05] 1/0.75 [19.05] 1/0.75 [19.05] 1/0.75 [19.05]
Outdoor Fan—Type Propeller Propeller Propeller PropellerNo. Used/Diameter in. [mm] 1/24 [609.6] 1/24 [609.6] 1/24 [609.6] 1/24 [609.6]Drive Type/No. Speeds Direct/1 Direct/1 Direct/1 Direct/1CFM [L/s] 3680 [1737] 3680 [1737] 3680 [1737] 3680 [1737]No. Motors/HP 1 at 1/3 HP 1 at 1/3 HP 1 at 1/3 HP 1 at 1/3 HPMotor RPM 1075 1075 1075 1075
Indoor Fan—Type FC Centrifugal FC Centrifugal FC Centrifugal FC CentrifugalNo. Used/Diameter in. [mm] 1/10x10 [254x254] 1/10x10 [254x254] 1/10x10 [254x254] 1/10x10 [254x254]Drive Type/No. Speeds Direct/3 Direct/3 Direct/3 Belt/VariableNo. Motors 1 1 1 1Motor HP 1/2 1/2 1/2 1/2Motor RPM 1075 1075 1075 1725Motor Frame Size 48 48 48 48
Filter—Type Disposable Disposable Disposable DisposableFurnished Yes Yes Yes Yes(No.) Size Recommended in. [mm] (1)1x16x25 [25x406x635] (1)1x16x25 [25x406x635] (1)1x16x25 [25x406x635] (1)1x16x25 [25x406x635]
Refrigerant Charge Oz. [g] 93 [2637] 93 [2637] 167 [4734] 167 [4734]Weights
Ship Weight lbs. [kg] 550 [249] 550 [249] 587 [266] 587 [266]
11.4/13.1
(1)1x16x25 [25x406x635] (1)1x16x25 [25x406x635] (1)1x16x25 [25x406x635] (1)1x16x25 [25x406x635]
CONTINUED
[ ] Designates Metric Conversions
NOTES:1. Cooling Performance is rated at 95° F ambient, 80° F entering dry bulb, 67° F entering wet bulb. Gross capacity does
not include the effect of fan motor heat. ARI capacity is net and includes the effect of fan motor heat. Units are suitablefor operation to 20% of nominal cfm. Units are certified in accordance with the Unitary Air Conditioner Equipmentcertification program, which is based on ARI Standard 210/240 or 360.
2. EER and/or SEER are rated at ARI conditions and in accordance with DOE test procedures.
3. Integrated Part Load Value is rated in accordance with ARI Standard 210/240 or 360. Units are rated at 80° F ambient,80° F entering dry bulb, and 67° F entering wet bulb at ARI rated cfm.
4. Outdoor Sound Rating shown is tested in accordance with ARI Standard 270.
-
IM 86414
General DataNominal Sizes 3-5 Tons [10.6-17.6 kW] ASHRAE 90.1-2004 Compliant Models
McQuay MPS Series 005AYCM 005AYDMCooling Performance1
Gross Cooling Capacity Btu [kW] 60,000 [17.58] 60,000 [17.58]EER/SEER2 11.6/13 11.6/13Nominal CFM/ARI Rated CFM [L/s] 2000/1900 [897/897] 2000/1900 [897/897]ARI Net Cooling Capacity Btu [kW] 58,000 [16.99] 58,000 [16.99]Net Sensible Capacity Btu [kW] 42,000 [12.31] 42,000 [12.31]
Net System Power kW 5 5
Net Weight lbs. [kg] 590 [268] 590 [268]
CompressorNo./Type 1/Scroll 1/Scroll
Outdoor Sound Rating (dB)4 83 83Outdoor Coil—Fin Type Louvered LouveredTube Type Rifled RifledTube Size in. [mm] OD 0.375 [9.5] 0.375 [9.5]Face Area sq. ft. [sq. m] 16.56 [1.54] 16.56 [1.54]Rows / FPI [FPcm] 2 / 22 [9] 2 / 22 [9]
Net Latent Capacity Btu [kW] 16,000 [4.69] 16,000 [4.69]
Indoor Coil—Fin Type Corrugated CorrugatedTube Type Rifled RifledTube Size in. [mm] 0.375 [9.5] 0.375 [9.5]Face Area sq. ft. [sq. m] 5.17 [0.48] 5.17 [0.48]Rows / FPI [FPcm] 3 / 15 [6] 3 / 15 [6]Refrigerant Control TX Valves TX ValvesDrain Connection No./Size in. [mm] 1/0.75 [19.05] 1/0.75 [19.05]
Outdoor Fan—Type Propeller PropellerNo. Used/Diameter in. [mm] 1/24 [609.6] 1/24 [609.6]Drive Type/No. Speeds Direct/1 Direct/1CFM [L/s] 3930 [1855] 3930 [1855]No. Motors/HP 1 at 1/3 HP 1 at 1/3 HPMotor RPM 1075 1075
Indoor Fan—Type FC Centrifugal FC CentrifugalNo. Used/Diameter in. [mm] 1/10x10 [254x254] 1/10x10 [254x254]Drive Type/No. Speeds Belt/Variable Belt/VariableNo. Motors 1 1Motor HP 1 1 Motor RPM 1725 1725Motor Frame Size 56 56
Filter—Type Disposable DisposableFurnished Yes Yes(No.) Size Recommended in. [mm] (1)1x16x25 [25x406x635] (1)1x16x25 [25x406x635]
Refrigerant Charge Oz. (Sys. 1/Sys. 2) [g] 160 [4536] 160 [4536]Weights
Ship Weight lbs. [kg] 597 [271] 597 [271]
(1)1x16x25 [25x406x635] (1)1x16x25 [25x406x635]
[ ] Designates Metric Conversions
NOTES:1. Cooling Performance is rated at 95° F ambient, 80° F entering dry bulb, 67° F entering wet bulb. Gross capacity does
not include the effect of fan motor heat. ARI capacity is net and includes the effect of fan motor heat. Units are suitablefor operation to 20% of nominal cfm. Units are certified in accordance with the Unitary Air Conditioner Equipmentcertification program, which is based on ARI Standard 210/240 or 360.
2. EER and/or SEER are rated at ARI conditions and in accordance with DOE test procedures.
3. Integrated Part Load Value is rated in accordance with ARI Standard 210/240 or 360. Units are rated at 80° F ambient,80° F entering dry bulb, and 67° F entering wet bulb at ARI rated cfm.
4. Outdoor Sound Rating shown is tested in accordance with ARI Standard 270.
-
15
MiscellaneousELECTRICAL DATA
Minimum Circuit Ampacity 18/18
Unit
Info
rmat
ion
Unit OperatingVoltage Range 187-253
Minimum OvercurrentProtection Device Size 20/20
Maximum OvercurrentProtection Device Size 25/25
Com
pres
sor M
otor
No. 1Volts 208/230Phase 3
HP 3RPM 3450
Amps (RLA) 9.6/9.6Amps (LRA) 73/73
Cond
ense
r Mot
or
No. 1Volts 208/230Phase 1
HP 1/3Amps (FLA) 1.5Amps (LRA) 3
Evap
orat
or F
an
No. 1Volts 208/230Phase 1
HP 1/2Amps (FLA) 4Amps (LRA) 6.7 3.6
21/21
4601
1.91
1/31
4601
385.8
345033
4601
15
15
11
414-506
6.74
1/21
208/23013
1.51/31
208/2301
80.8/80.812.2/12.2
345043
208/2301
30/30
25/25
21/21
187-253
3.62
1/21
4601
1.91
1/31
4601416.1
345043
4601
15
15
11
414-506
243.813
208/2301
4.92.21/31
208/2301
110/11015.4/15.4
345053
208/2301
40/40
30/30
26/26
187-253
121.913
4601
1.91
1/31
4601
527.1
345053
4601
15
15
12
414-506
003AYCK 003AYDK 004AYCK 004AYDK 005AYCM 005AYDM
1. Horsepower Per Compressor.2. Amp Draw Per Motor. Multiply Value By Number of Motors to Determine Total Amps.
IM 864
-
16 IM 864
INDOOR AIRFLOW PERFORMANCE FOR 3-4 TON PACKAGED ROOFTOP SYSTEMDIRECT DRIVE
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
CF
M12
1011
9311
7511
5511
2510
7510
1592
5W
atts
450
400
395
385
380
375
370
360
CF
M15
1515
0014
7514
5014
0513
5012
7511
80W
atts
525
515
510
505
490
475
460
445
CF
M16
8016
5016
2515
8015
3014
6013
9012
80W
atts
650
640
630
610
580
560
545
515
CF
M12
1011
9311
7511
5511
2510
7510
1592
5W
atts
450
400
395
385
380
375
370
360
CF
M15
1515
0014
7514
5014
0513
5012
7511
80W
atts
525
515
510
505
490
475
460
445
CF
M16
8016
5016
2515
8015
3014
6013
9012
80W
atts
650
640
630
610
580
560
545
515
DIR
EC
T-D
RIV
E B
LOW
ER
208
AIR
FLO
W P
ER
FOR
MA
NC
E -
3 &
4 T
ON
S
CFM
Air
Del
iver
y/R
PM
/Wat
ts-2
08 V
OLT
S
Ext
erna
l Sta
tic P
ress
ure-
Inch
es W
.C.
Uni
t Mod
el
MP
S00
3A
MP
S00
4A
Coo
l
Low
Med
Hea
t
Low
Mot
or S
peed
Fro
m F
acto
ryH
eatin
gIn
put
BT
U/h
r[k
W]
[06]
[10]
[12]
[15]
[20]
Man
ufac
ture
rR
ecom
men
ded
Air-
Flo
w R
ange
(Min
/ M
ax)
CF
M
1050
/ 13
50
Blo
wer
Siz
e/M
otor
HP
#of
Spe
eds
10x1
01/
23
Spe
ed
Mot
orS
peed
Low
Med
Hig
h
Med
[06]
[10]
[12]
[15]
[20]
1400
/ 18
0010
x10
1/2
3 S
peed
Low
Med
Hig
h
-
17IM 864
INDOOR AIRFLOW PERFORMANCE FOR 3-4 TON PACKAGED ROOFTOP SYSTEMDIRECT DRIVE
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
CF
M14
0013
7513
6013
3513
0512
5512
1011
00W
atts
470
460
455
450
440
435
425
410
CF
M16
8516
2015
8015
5015
0014
3013
5012
30W
atts
635
600
580
570
550
535
505
475
CF
M18
7018
3017
9017
3016
6015
8015
0013
75W
atts
780
760
740
700
660
635
600
555
CF
M14
0013
7513
6013
3513
0512
5512
1011
00W
atts
470
460
455
450
440
435
425
410
CF
M16
8516
2015
8015
5015
0014
3013
5012
30W
atts
635
600
580
570
550
535
505
475
CF
M18
7018
3017
9017
3016
6015
8015
0013
75W
atts
780
760
740
700
660
635
600
555
DIR
EC
T-D
RIV
E 2
30 A
IRFL
OW
PE
RFO
RM
AN
CE
- 3
& 4
TO
NS
CFM
Air
Del
iver
y/R
PM
/Wat
ts-2
30 V
OLT
S
Ext
erna
l Sta
tic P
ress
ure-
Inch
es W
.C.
Uni
t Mod
el
MP
S00
3A
MP
S00
4A
Coo
l
Low
Med
Hea
t
Low
Mot
or S
peed
Fro
m F
acto
ryH
eatin
gIn
put
BT
U/h
r[k
W]
[06]
[10]
[12]
[15]
[20]
Man
ufac
ture
rR
ecom
men
ded
Air-
Flo
w R
ange
(Min
/ M
ax)
CF
M
1050
/ 13
50
Blo
wer
Siz
e/M
otor
HP
#of
Spe
eds
10x1
01/
23
Spe
ed
Mot
orS
peed
Low
Med
Hig
h
Med
[06]
[10]
[12]
[15]
[20]
1400
/ 18
0010
x10
1/2
3 S
peed
Low
Med
Hig
h
-
18 IM 864
INDOOR AIRFLOW PERFORMANCE FOR 3-4 TON PACKAGED ROOFTOP SYSTEMDIRECT DRIVE
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
CF
M14
0013
7513
6013
3513
0512
5512
1011
00W
atts
470
460
455
450
440
435
425
410
CF
M16
8516
2015
8015
5015
0014
3013
5012
30W
atts
635
600
580
570
550
535
505
475
CF
M18
7018
3017
9017
3016
6015
8015
0013
75W
atts
780
760
740
700
660
635
600
555
CF
M14
0013
7513
6013
3513
0512
5512
1011
00W
atts
470
460
455
450
440
435
425
410
CF
M16
8516
2015
8015
5015
0014
3013
5012
30W
atts
635
600
580
570
550
535
505
475
CF
M18
7018
3017
9017
3016
6015
8015
0013
75W
atts
780
760
740
700
660
635
600
555
DIR
EC
T-D
RIV
E 4
60 A
IRFL
OW
PE
RFO
RM
AN
CE
- 3
& 4
TO
NS
CFM
Air
Del
iver
y/R
PM
/Wat
ts-4
60 V
OLT
S
Ext
erna
l Sta
tic P
ress
ure-
Inch
es W
.C.
Uni
t Mod
el
MP
S00
3A
MP
S00
4A
Coo
l
Low
Med
Hea
t
Low
Mot
or S
peed
Fro
m F
acto
ryH
eatin
gIn
put
BT
U/h
r[k
W]
[06]
[10]
[12]
[15]
[20]
Man
ufac
ture
rR
ecom
men
ded
Air-
Flo
w R
ange
(Min
/ M
ax)
CF
M
1050
/ 13
50
Blo
wer
Siz
e/M
otor
HP
#of
Spe
eds
10x1
01/
23
Spe
ed
Mot
orS
peed
Low
Med
Hig
h
Med
[06]
[10]
[12]
[15]
[20]
1400
/ 18
0010
x10
1/2
3 S
peed
Low
Med
Hig
h
-
19IM 864
INDOOR AIRFLOW PERFORMANCE FOR 5 TON PACKAGED ROOFTOP SYSTEMBELT DRIVE
“M”
“L”
RP
M
— — — — 780
800
830
860
895
940
970
WA
TTS
— — — — 455
485
550
615
680
755
825
RP
M
— — 780
795
815
850
880
915
945
975
1015
WA
TTS
— — 390
450
470
530
605
655
735
795
880
RP
M
780
795
805
840
870
895
930
955
995
1015
1040
WA
TTS
370
405
425
490
540
590
655
705
780
830
925
RP
M
815
840
870
895
915
945
970
1005
1030
1065
1100
WA
TTS
385
415
470
530
540
640
700
760
830
910
1005
RP
M
875
895
915
940
965
995
1015
1040
1060
1100
1145
WA
TTS
425
440
510
570
675
675
730
820
880
965
1055
RP
M
930
945
965
990
1010
1035
1055
1090
1120
1150
1175
WA
TTS
460
500
560
605
660
720
790
870
940
1025
1085
RP
M
970
995
1015
1035
1055
1070
1105
1130
1155
1180
1225
WA
TTS
490
540
600
640
710
775
830
910
980
1050
1140
RP
M
1030
1045
1060
1075
1100
1120
1145
1170
1195
1225
1260
WA
TTS
540
595
640
680
760
810
875
950
1020
1095
1175
RP
M
1065
1080
1105
1120
1140
1160
1180
1210
1240
1265
1300
WA
TTS
570
615
680
725
785
850
910
995
1055
1125
1210
RP
M
1105
1135
1145
1160
1175
1200
1225
1250
1275
1310
1340
WA
TTS
595
650
705
755
810
890
950
1020
1100
1175
1255
RP
M
1150
1165
1180
1200
1225
1245
1260
1290
1320
1350
1370
WA
TTS
615
675
730
790
850
915
980
1060
1140
1230
1315
RP
M
1195
1215
1225
1245
1260
1290
1320
1335
1360
1375
1400
WA
TTS
645
700
750
815
880
960
1035
1100
1180
1260
1375
RP
M
1235
1255
1275
1300
1320
1335
1350
1370
1385
1405 —
WA
TTS
660
735
790
855
930
1000
1075
1150
1225
1320 —
RP
M
1300
1320
1340
1355
1365
1375
1385
1400 — — —
WA
TTS
705
775
840
905
985
1050
1120
1200 — — —
RP
M
1340
1355
1365
1375
1390
1405 — — — — —
WA
TTS
745
805
880
940
1020
1100 — — — — —
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.10
1.20
1.30
1.40
1.50
EX
TER
NA
L S
TATI
C P
RE
SS
UR
E–I
NC
HE
S O
F W
ATE
RV
OLT
AG
E
208-
230,
460
- 3
PH
AS
EC
AP
AC
ITY
5 TO
N P
AC
KA
GE
D A
IR C
ON
DIT
ION
ER
(13
SE
ER
)A
IRFL
OW
CFM
1400
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
DRIV
E PA
CKAG
E“L
”“M
”
MO
TOR
H.P.
3/4
1
BLO
WER
SHE
AVE
6.4
PITC
H DI
AMET
ER6.
4 PI
TCH
DIAM
ETER
MO
TOR
SHEA
VE2.
8-3.
8 PI
TCH
DIAM
ETER
- AD
J.3.
4-4.
4 PI
TCH
DIAM
ETER
- AD
J.
TURN
S O
PEN
01
23
45
60
12
34
56
RPM
1095
1040
995
940
890
835
780
1405
1360
1305
1250
1195
1145
1095
BE
LT D
RIV
E A
IRF
LO
W P
ER
FO
RM
AN
CE
- 5
TO
N
NO
TE: L
-driv
e le
ft of
bol
d lin
e, M
-driv
e rig
ht o
f bol
d lin
e.
NO
TE: F
acto
ry s
heav
e se
tting
s ar
e sh
own
in b
old
prin
t.
-
20 IM 864
AUXILIARY HEATER KITS CHARACTERISTICS AND APPLICATION
208-
240
VO
LT, T
HR
EE
PH
AS
E, 6
0 H
Z, A
UX
ILIA
RY
ELE
CT
RIC
HE
AT
ER
KIT
S C
HA
RA
CT
ER
IST
ICS
AN
D A
PP
LIC
AT
ION
Sin
gle
Po
wer
Sup
ply
Fo
r B
oth
Uni
t A
nd H
eate
r K
itS
epar
ate
Po
wer
Sup
ply
Fo
r B
oth
Uni
t A
nd H
eate
r K
it
Mod
elN
o.M
PS
Hea
ter
Kit
Nom
inal
kW
Rat
ed H
eate
rkW
@20
8-24
0 V
Hea
ter
KB
TU
/Hr
@20
8-24
0 V
Hea
ter
Am
p. @
208-
240
V
Uni
t Min
. Ckt
Am
paci
ty @
208-
240V
Min
/Max
@20
8 V
Min
/Max
@24
0 V
Ove
r C
urre
ntP
rote
ctiv
e D
evic
e S
ize
Hea
ter
Kit
Min
. Ckt
.A
mpa
city
Hea
ter
Kit
Max
. Fus
eS
ize
Air
Con
ditio
ner
Min
. Ckt
.A
mpa
city
208-
240
VM
in/M
ax @
208
VM
in/M
ax @
240
V
Air
Con
ditio
ner
Ove
rC
urre
nt P
rote
ctiv
eD
evic
e S
ize
No
Hea
t-
--
18/1
820
/25
20/2
5-
-18
/18
20/2
520
/25
A06
C+
4.2/
5.6
14.3
3/19
.10
11.7
/13.
520
/22
20/2
020
/25
15/1
715
/20
--
-A
10C
+7.
2/9.
624
.56/
32.7
520
.0/2
3.1
31/3
435
/35
35/3
525
/29
25/3
0-
--
*A11
C+
7.2/
9.6
24.5
6/32
.75
20.0
/23.
131
/ 34
35/3
535
/35
25/2
925
/30
--
-A
12C
+8.
4/11
.228
.66/
38.2
123
.4/2
7.0
35/3
935
/35
40/4
030
/34
30/3
5-
--
A15
C+
10.8
/14.
436
.84/
49.1
330
.1/3
4.7
43/4
945
/45
50/5
038
/44
40/4
5-
--
A20
C+
14.4
/19.
249
.13/
65.5
140
.1/4
6.2
56/6
360
/60
70/7
050
/58
50/6
0-
--
*A21
C+
14.4
/19.
249
.13/
65.5
140
.1/4
6.2
56/6
360
/60
70/7
050
/58
50/6
0-
--
No
Hea
t-
--
21/2
125
/30
25/3
0-
-21
/21
25/3
025
/30
A06
C+
4.2/
5.6
14.3
3/19
.10
11.7
/13.
520
/22
25/3
025
/30
15/1
715
/20
--
-A
10C
+7.
2/9.
624
.56/
32.7
520
.0/2
3.1
31/3
435
/35
35/3
525
/29
25/3
0-
--
*A11
C+
7.2/
9.6
24.5
6/32
.75
20.0
/23.
131
/34
35/3
535
/35
25/2
925
/30
--
-A
12C
+8.
4/11
.228
.66/
38.2
123
.4/2
7.0
35/3
935
/35
40/4
030
/34
30/3
5-
--
A15
C+
10.8
/14.
436
.84/
49.1
330
.1/3
4.7
43/4
945
/45
50/5
038
/44
40/4
5-
--
A20
C+
14.4
/19.
249
.13/
65.5
140
.1/4
6.2
56/6
360
/60
70/7
050
/58
50/6
0-
--
*A21
C+
14.4
/19.
249
.13/
65.5
140
.1/4
6.2
56/6
360
/60
70/7
050
/58
50/6
0-
--
003A
YC
K
004A
YC
K
* =
For
Can
adia
n us
e on
ly. U
ses
“P”
fuse
s fo
r in
duct
ive
circ
uit
+ =
Fie
ld In
stal
led
Onl
y
-
21IM 864
AUXILIARY HEATER KITS CHARACTERISTICS AND APPLICATION
Mod
elN
o.M
PS
Hea
ter
Kit
Nom
inal
kW
208-
240
VO
LT, T
HR
EE
PH
AS
E, 6
0 H
Z, A
UX
ILIA
RY
ELE
CT
RIC
HE
AT
ER
KIT
S C
HA
RA
CT
ER
IST
ICS
AN
D A
PP
LIC
AT
ION
Sin
gle
Po
wer
Sup
ply
Fo
r B
oth
Uni
t A
nd H
eate
r K
itS
epar
ate
Po
wer
Sup
ply
Fo
r B
oth
Uni
t A
nd H
eate
r K
it
Rat
ed H
eate
rkW
@20
8-24
0 V
Hea
ter
KB
TU
/Hr
@20
8-24
0 V
Hea
ter
Am
p. @
208-
240
V
Uni
t Min
. Ckt
Am
paci
ty @
208-
240V
Min
/Max
@20
8 V
Min
/Max
@24
0 V
Ove
r C
urre
ntP
rote
ctiv
e D
evic
e S
ize
Hea
ter
Kit
Min
. Ckt
.A
mpa
city
Hea
ter
Kit
Max
. Fus
eS
ize
Air
Con
ditio
ner
Min
. Ckt
.A
mpa
city
208-
240
VM
in/M
ax @
208
VM
in/M
ax @
240
V
Air
Con
ditio
ner
Ove
rC
urre
nt P
rote
ctiv
eD
evic
e S
ize
No
Hea
t-
--
26/2
630
/40
30/4
0-
-26
/26
30/4
030
/40
A06
C+
4.2/
5.6
14.3
3/19
.10
11.7
/13.
526
/26
30/4
030
/40
15/1
715
/20
A10
C+
7.2/
9.6
24.5
6/32
.75
20.0
/23.
130
/34
30/4
030
/40
25/2
925
/30
*A11
C+
7.2/
9.6
24.5
6/32
.75
20.0
/23.
130
/34
30/4
030
/40
25/2
925
/ 30
A12
C+
8.4/
11.2
28.6
6/38
.21
23.4
/27.
035
/39
35/4
030
/40
30/3
430
/35
A15
C10
.8/1
4.4
36.8
4/49
.13
30.1
/34.
743
/49
45/4
550
/50
38/4
440
/45
A20
C+
14.4
/19.
249
.13/
65.5
140
.1/4
6.2
55/6
360
/60
70/7
050
/58
50/6
0-
--
*A21
C+
14.4
/19.
249
.13/
65.5
140
.1/4
6.2
55/6
360
/60
70/7
050
/58
50/6
0-
--
A24
C+
18.0
/24.
061
.41/
81.8
850
.1/5
7.8
68/7
870
/70
80/8
050
/58
50/6
0-
--
005A
YC
M
* =
For
Can
adia
n us
e on
ly. U
ses
“P”
fuse
s fo
r in
duct
ive
circ
uit
+ =
Fie
ld In
stal
led
Onl
y
-
22 IM 864
AUXILIARY HEATER KITS CHARACTERISTICS AND APPLICATION
460
VO
LT, T
HR
EE
PH
AS
E, 6
0 H
Z, A
UX
ILIA
RY
ELE
CT
RIC
HE
AT
ER
KIT
S C
HA
RA
CT
ER
IST
ICS
AN
D A
PP
LIC
AT
ION
Sin
gle
Po
wer
Sup
ply
Fo
r B
oth
Uni
t A
nd H
eate
r K
itS
epar
ate
Po
wer
Sup
ply
Fo
r B
oth
Uni
t A
nd H
eate
r K
it
Mod
elN
o.M
PS
Hea
ter
Kit
Nom
inal
kW
Rat
ed H
eate
rkW
@ 4
80 V
Hea
ter
KB
TU
/Hr
@48
0 V
Hea
ter
Am
p. @
480
V
Uni
t Min
. Ckt
Am
paci
ty @
480
VM
in/M
ax @
480
VM
in/M
ax @
480
V
Ove
r C
urre
ntP
rote
ctiv
e D
evic
e S
ize
Hea
ter
Kit
Min
. Ckt
.A
mpa
city
Hea
ter
Kit
Max
. Fus
eS
ize
Air
Con
ditio
ner
Min
. Ckt
.A
mpa
city
480
Min
/Max
@48
0 V
Min
/Max
@48
0 V
Air
Con
ditio
ner
Ove
rC
urre
nt P
rote
ctiv
eD
evic
e S
ize
No
Hea
t-
--
1015
15-
-10
1515
A06
D+
5.6
19.1
06.
711
1515
915
A10
D+
9.6
32.7
511
.617
2020
1515
*A11
D+
9.6
32.7
511
.617
2020
1515
A12
D+
11.2
38.2
113
.519
2020
1720
A15
D+
14.4
49.1
317
.324
2525
2225
A20
D+
19.2
65.5
123
.131
3535
3030
--
-*A
21D
+19
.265
.51
23.1
3135
3 529
30-
--
No
Hea
t-
--
1115
15-
-11
1515
A06
D+
5.6
19.1
06.
711
1515
915
A10
D+
9.6
32.7
511
.617
2020
1515
*A11
D+
9.6
32.7
511
.617
2020
1515
A12
D+
11.2
38.2
113
.519
2020
1720
A15
D+
14.4
49.1
317
.324
2525
2225
--
-A
20D
+19
.265
.51
23.1
3135
3530
30-
--
*A21
D+
19.2
65.5
123
.131
3535
2930
--
-
003A
YD
K
004A
YD
K
* =
For
Can
adia
n us
e on
ly. U
ses
“P”
fuse
s fo
r in
duct
ive
circ
uit
+ =
Fie
ld In
stal
led
Onl
y
-
23IM 864
AUXILIARY HEATER KITS CHARACTERISTICS AND APPLICATION
460
VO
LT, T
HR
EE
PH
AS
E, 6
0 H
Z, A
UX
ILIA
RY
ELE
CT
RIC
HE
AT
ER
KIT
S C
HA
RA
CT
ER
IST
ICS
AN
D A
PP
LIC
AT
ION
Sin
gle
Po
wer
Sup
ply
Fo
r B
oth
Uni
t A
nd H
eate
r K
itS
epar
ate
Po
wer
Sup
ply
Fo
r B
oth
Uni
t A
nd H
eate
r K
it
Mod
elN
o.M
PS
Hea
ter
Kit
Nom
inal
kW
Rat
ed H
eate
rkW
@ 4
80 V
Hea
ter
KB
TU
/Hr
@48
0 V
Hea
ter
Am
p. @
480
V
Uni
t Min
. Ckt
Am
paci
ty @
480
VM
in/M
ax @
480
VM
in/M
ax @
480
V
Ove
r C
urre
ntP
rote
ctiv
e D
evic
e S
ize
Hea
ter
Kit
Min
. Ckt
.A
mpa
city
Hea
ter
Kit
Max
. Fus
eS
ize
Air
Con
ditio
ner
Min
. Ckt
.A
mpa
city
480
Min
/Max
@48
0 V
Min
/Max
@48
0 V
Air
Con
ditio
ner
Ove
rC
urre
nt P
rote
ctiv
eD
evic
e S
ize
No
Hea
t-
--
1215
15-
-12
1515
A06
D+
5.6
19.1
06.
712
1515
915
A10
D+
9.6
32.7
511
.617
2020
1515
*A11
D+
9.6
32.7
511
.617
2020
1515
A12
D+
11.2
38.2
113
.519
2020
1720
A15
D+
14.4
49.1
317
.324
2525
2225
A20
D+
19.2
65.5
123
.131
3535
3030
--
-*A
21D
+19
.265
.51
23.1
3135
3 529
30-
--
A24
D+
24.0
81.8
828
.939
4040
3740
--
-
005A
YD
L
* =
For
Can
adia
n us
e on
ly. U
ses
“P”
fuse
s fo
r in
duct
ive
circ
uit
+ =
Fie
ld In
stal
led
Onl
y
-
24 IM 864
AUXILIARY HEATER KITS CHARACTERISTICS AND APPLICATION
460
VO
LT, T
HR
EE
PH
AS
E, 6
0 H
Z, A
UX
ILIA
RY
ELE
CT
RIC
HE
AT
ER
KIT
S C
HA
RA
CT
ER
IST
ICS
AN
D A
PP
LIC
AT
ION
Sin
gle
Po
wer
Sup
ply
Fo
r B
oth
Uni
t A
nd H
eate
r K
itS
epar
ate
Po
wer
Sup
ply
Fo
r B
oth
Uni
t A
nd H
eate
r K
it
Mod
elN
o.M
PS
Hea
ter
Kit
Nom
inal
kW
Rat
ed H
eate
rkW
@ 2
08-
480
V
Hea
ter
KB
TU
/Hr
@48
0 V
Hea
ter
Am
p. @
480
V
Uni
t Min
. Ckt
Am
paci
ty @
480
VM
in/M
ax @
480
VM
in/M
ax @
480
V
Ove
r C
urre
ntP
rote
ctiv
e D
evic
e S
ize
Hea
ter
Kit
Min
. Ckt
.A
mpa
city
Hea
ter
Kit
Min
. Ckt
.A
mpa
city
Air
Con
ditio
ner
Am
paci
ty 4
80M
in/M
ax @
480
VM
in/M
ax @
480
V
Air
Con
ditio
ner
Ove
rC
urre
nt P
rote
ctiv
eD
evic
e S
ize
No
Hea
t-
--
1215
15-
-12
1515
A06
D+
5.6
19.1
06.
712
1515
915
A10
D+
9.6
32.7
511
.617
2020
1515
*A11
D+
9.6
32.7
511
.617
2020
1515
A12
D+
11.2
38.2
113
.520
2020
1720
A15
D+
14.4
49.1
317
.325
2525
2225
A20
D+
19.2
65.5
123
.132
3535
3030
--
-*A
21D
+19
.265
.51
23.1
3235
3529
30-
--
A24
D+
24.0
81.8
828
.939
4040
3740
--
-
005A
YD
M
* =
For
Can
adia
n us
e on
ly. U
ses
“P”
fuse
s fo
r in
duct
ive
circ
uit
+ =
Fie
ld In
stal
led
Onl
y
-
25IM 864
Figure 15: Wiring Diagram – 3 and 4 Tons
-
26 IM 864
Figure 16: Wiring Diagram – 3 and 4 Tons
-
IM 864 27
Figure 17: Wiring Diagram – 5 Tons
-
28 IM 864
3 TON AIR CONDITIONER - 13 SEER
-
29IM 864
4 TON AIR CONDITIONER - 13 SEER
-
30 IM 864
5 TON AIR CONDITIONER - 13 SEER
-
31IM 864
SYMPTOM POSSIBLE CAUSE REMEDY
Unit will not run • Power off or loose electrical connection • Check for correct voltage at compressor contactor in controlbox
• Thermostat out of calibration-set too high • Reset• Defective contactor • Check for 24 volts at contactor coil - replace if contacts are
open• Blown fuses • Replace fuses• Transformer defective • Check wiring-replace transformer• High pressure control open (if provided) • Reset-also see high head pressure remedy-The high pressure
control opens at 450 PSIG• Interconnecting low voltage wiring damaged • Replace thermostat wiring
Condenser fan runs, compressor • Run capacitor defective (single phase only) • Replacedoesn’t • Start relay defective (single phase on;y) • Replace
• Loose connection • Check for correct voltage at compressor -check & tighten all connections
• Compressor stuck, grounded or open motor winding, • Wait at least 2 hours for overload to reset.open internal overload. If still open, replace the compressor.
• Low voltage condition • At compressor terminals, voltage must be within 10% of ratingplate volts when unit is operating
• Low voltage condition • Add start kit components
Insufficient cooling • Improperly sized unit • Recalculate load• Improper airflow • Check - should be approximately 400 CFM per ton.• Incorrect refrigerant charge • Charge per procedure attached to unit service panel• Air, non-condensibles or moisture in system • Recover refrigerant, evacuate & recharge, add filter drier• Incorrect voltage • At compressor terminals, voltage must be within 10% of rating
plate volts when unit is operating.
Compressor short cycles • Incorrect voltage • At compressor terminals, voltage must be ±10% ofnameplate marking when unit is operating.
• Defective overload protector • Replace - check for correct voltage• Refrigerant undercharge • Add refrigerant
Registers sweat • Low evaporator airflow • Increase speed of blower or reduce restriction - replace airfilter
High head-low vapor pressures • Restriction in liquid line, expansion device or filter drier • Remove or replace defective component• Flow check piston size too small • Change to correct size piston• Incorrect capillary tubes • Change coil assembly• TXV does not open • Replace TXV
High head-high or normal vapor • Dirty condenser coil • Clean coilpressure - Cooling mode • Refrigerant overcharge • Correct system charge
• Condenser fan not running • Repair or replace• Air or non-condensibles in system • Recover refrigerant, evacuate & recharge
Low head-high vapor pressures • Flow check piston size too large • Change to correct size piston• Defective Compressor valves • Replace compressor• Incorrect capillary tubes • Replace coil assembly
Low vapor - cool compressor - • Low evaporator airflow • Increase speed of blower or reduce restriction - replace airiced evaporator coil filter
• Operating below 65°F outdoors • Add Low Ambient Kit• Moisture in system • Recover refrigerant - evacuate & recharge - add filter drier• TXV limiting refrigerant flow • Replace TXV
High vapor pressure • Excessive load • Recheck load calculation• Defective compressor • Replace
Fluctuating head & vapor • TXV hunting • Check TXV bulb clamp - check air distribution on coil - replacepressures TXV
• Air or non-condensate in system • Recover refrigerant, evacuate & recharge
Gurgle or pulsing noise at • Air or non-condensibles in system • Recover refrigerant, evacuate & rechargeexpansion device or liquid line
Trouble Shooting Chart
Disconnect all power to unit before servicing. Contactor may break only one side. Failure to shut off power can cause electricalshock resulting in personal injury or death.
▲▲DANGER!
-
32 IM 864
McQuay Training and Development
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 Limited Product Warranty. Consult your local McQuay Representative for warranty details. Refer to Form 933-43285Y. To find yourlocal McQuay Representative, go to www.mcquay.com.
This document contains the most current product information as of this printing. For the most up-to-date product information, please go to www.mcquay.com.
© 2007 McQuay International • www.mcquay.com • 800-432-1342