FURNACEBLOWER MOTOR
MODEL 50CURRENT SENSING RELAY
(IF REQUIRED)
24 VAC FURNACE ACCESSORYTERMINALS OR TRANSFORMER
(10VA MINIMUM) SHUT-OFF(SADDLE VALVE)
WATER SUPPLY
YELLOW 24VSOLENOID
VALVE WIRES
IMPORTANTUSE 120 VAC POWER SOURCE OTHER THAN FURNACE MOTORCIRCUIT. HOWEVER, THE TRANSFORMER CAN BE POWEREDOFF THE HOT 120 VAC LINE BEFORE IT ENTERS THE FURNACE.• DO NOT WIRE TRANSFORMER INTO FURNACE BLOWER CIRCUIT.
IMPORTANTWHEN MODEL 50 CURRENTSENSING RELAY IS USED:• WIRE MODEL 50 CURRENT
SENSING RELAY INTO 24 VACHUMIDIFIER CONTROLCIRCUIT ONLY! DO NOTINSTALL IN TRANSFORMERPRIMARY CIRCUIT.
CONNECT DRAIN LINE HERE
COMMON
HI
LO
YELLOW WIRES
G
Y
W
C
R
THERMOSTAT
110 VAC
R
C
W
Y
G
FURNACE
OUTDOOR TEMPERATURESENSOR FOR
AUTOMATIC MODE
NORTH, EASTOR WEST SIDE
OF HOME
ABOVE EXPECTEDSNOW LINE
CONTINUOUSLY POWERED24 VAC TRANSFORMER
PROVIDED WITH HUMIDIFIER
CONNECT TOHOT WATER SUPPLY
CONNECT DRAINLINE HERE
OUTPUTSINPUTSPOWER
GWCR H HODT GfA
ADHC TERMINAL STRIP
B
90-1510
90-1207
Model 600MMANUAL CONTROL
Model 600DIGITAL HUMIDIFIER CONTROL
READ COMPLETE SAFETY INSTRUCTIONS AND INSTALLATION TEMPLATE BEFORE STARTING INSTALLATION
This product must be installed by a qualified heating and air conditioning contractor. Failure to do so could result in serious injury from electrical shock.This product must be installed in compliance with all local, state and federal codes.
Proper humidification and humidity control also requires that the home be constructed in accordance with local codes and good building practices.
ATTENTION INSTALLER:
MODEL 600 SERIES HUMIDIFIER
TheModel 600 and 600M Aprilaire can be installedon either the supply or return plenum of a forcedair handling system and is easily reversible for
installation with right hand or left hand bypass ductconnections. The humidifier dimensions and
serviceability must be considered when selectingthe best location for the humidifier. Here are2 examples of many types of installations.
RESEARCH PRODUCTS CORPORATION • P.O. BOX 1467 • MADISON, WI 53701-1467 • CALL 800/334-6011 • FAX 608/257-4357
RETURN
SUPPLY
S
RETURN
R
SUPPLY
S
Horizontal
Upflow
90-1079
WARNING1. ELECTRICAL SHOCK HAZARD.
Disconnect electrical power to thefurnace before starting installation.Failure to do so could result inserious injury from electrical shock.
2. SHARP EDGES HAZARD. Sharpedges may cause serious injury fromcuts. Use care when making plenumopenings and handling ductwork.
3. RISK OF SCALDING.Watertemperature over 125°F can causesevere burns and scald instantly.Shut off the hot water supply beforedisconnecting or tapping into anyhot water supply line.
SPECIFICATIONS
HUMIDIFIER DIMENSIONS
Width (including solenoid valve): 153⁄8”Height (including drain spud): 153⁄4”
Depth: 101⁄4”
BYPASS DUCT OPENING
6” diameter
PLENUM OPENING
10”W x 123⁄4”H
WATER FEED RATE
3 gph
ELECTRICAL DATA
24 VAC-60 Hz, 0.5 AMP
CAUTION
1. Do not install humidifier where freezing temperaturescould occur. The water line could freeze and crackcausing water damage to the home.
2. Do not install humidifier or bypass connection on thefurnace jacket.
3. Do not install humidifier or bypass connection on aplenum face where the blanked off ends of the coolingcoil will restrict air movement through the humidifier.
4. Do not set humidity level above recommended or torecommended level if condensation exists on insidewindows of any unheated space, as condensationdamage may result. Excess humidity can causemoisture accumulation which can allow the possibilityfor mold growth in the home.
5. Do not connect Model 600 or 600M transformerto blower motor wiring. Premature componentfailure may result.
6. When installing Humidifier Control ondownflow furnace, ensure blower continues torun after a heat call is satisfied to eliminatehigh temperatures from damaging the Control.
7. Do not install humidifier where water pressureexceeds 125 psi, since damage to thehumidifier may result. Follow codes in effectconcerning pressure reduction.
8. Do not install humidifier on systems withgreater than 0.4 in. wg pressure differentialbetween supply and return plenums.
RISK OF PROPERTY AND EQUIPMENT DAMAGE.
INSTALLATIONOPTIONS
RECOMMENDED WIRING DIAGRAMS(SEE STEP 7 ON BACK AND “HUMIDIFIER CONTROL SAFETY AND INSTALLATION INSTRUCTIONS” FOR DETAILED WIRING INSTRUCTIONS)
NOTEWhen installing the Aprilaire humidifier withthe Aprilaire Digital Humidifier Control or on aheat pump system, use hot water. The heatedwater supplements the reduced supply airtemperature as added heat for evaporation.
READ COMPLETE SAFETY INSTRUCTIONS AND INSTALLATION TEMPLATE BEFORE STARTING INSTALLATION
TEMPLATE MUST BE LEVEL
– TOP –READ REVERSE SIDE FIRST! READ REVERSE SIDE FIRST!
IMPORTANT! Be sure owner’s manual containinginstructions for operation and warranty information is given toowner in order to avoid unnecessary calls.Warranty is void unlesshumidifier is installed by qualified heating and air conditioningcontractor due to possible misapplication of product.
NOTE: BEFORE LEAVING THEJOB SITE, MAKE SURE:1. Saddle valve is fully open.2. All plumbing connections arewatertight.
3. Humidifier functions properly.4. Bypass damper is in properposition.
Figure 1 Figure 2 Figure 3
10008975 B2205117A 4.10
90-1067 90-1068 90-1069
12
10
2
7
96
11
1
4
3
5
890-1250
FURNISHED ITEMS
ITEMS NOT FURNISHED
Built-in bypass damper24 VAC Transformer
Digital Humidifier Control(Model 600 only)
Manual Humidifier Control(Model 600M only)
Humidifier Control Installation InstructionsSaddle valve
Humidifier Installation Template
Mounting screws (sheet metal screws)Water supply line (1⁄4” copper)
Drain line (1⁄2” I.D. hose)Low voltage wireBypass ductwork
Model 50 Current Sensing Relay (if required)
1. Front Cover2. Base3. Feed Tube4. Water Distribution Tray5. Water Panel Evaporator6. Scale Control Insert7. Integral Damper8. Damper Handle9. Drain Spud
10. Hole Plug11. Nameplate12. Solenoid Valve
PARTS LIST
1. Press top & bottom tabsto remove cover (1).Pull feed tube (3) out ofdistribution tray (4). RemoveWater Panel® Evaporatorassembly. See Figure 1.
2. Humidifier is suppliedwith bypass ductconnection on left. For rightside bypass, swap locationof drain spud (9) and cap(10). Twist to remove spudand cap.
3. Position template onsupply or return plenum.Make sure template is level.Allow clearance for drainline and for servicing. Tracetemplate outline. Cut 10”wide x 12-3/4” high opening.Avoid injury from sharpedges.
4. Place humidifier base (2) inopening and secure with 6 screwsin openings provided.
5. Select location for 6” collaron opposite plenum to minimizelength and number of elbows inbypass duct. Install 6” bypassduct components. Attach duct tohumidifier collar using 2 screwsin openings provided.
6. Insert Water Panel Evaporatorassembly into base. Make surebottom of scale control insert (6)is in drain spud. Snap top ofevaporator assembly into base.Insert feed tube into distributiontray. See Figure 2. Rotatenameplate (11) if necessary, so itis right side up. Place point bypassdamper handle (8) to “WINTER”(open) for heating season and“SUMMER” for cooling season.
7. Control installationand wiring. Disconnectelectrical power to furnacebefore wiring control.In order for humidifier tooperate, furnace must beon and RH must be belowset-point of control.Wiring diagrams illustraterecommended method ofdetecting furnaceoperation.
MANUAL HUMIDIFIERCONTROL, MODEL 600M:
Manual Control can bemounted in return duct oron wall in living space.Knob and cover must beremoved to mount control.See wiring diagram for 24Vcontrol connections.
• For return duct mounting,position template at least 6”upstream of bypass ductconnection or humidifier.Avoid injury from sharpedges when cuttingopening. Make sure foamgasket is in place andsecure control to duct using2 screws in holes provided.
• For wall-mount, selectlocation that will not beaffected by drafts or heatsources. Remove anddiscard foam gasket andsecure control to wall overwire access opening usingscrews & anchors provided.
DIGITAL HUMIDIFIERCONTROL, MODEL 600:
• Select location for controlon return duct at least 6”upstream of bypass ductconnection or humidifier.Drill 3/4” hole for sensor.Knob and cover must beremoved to mount control.Place control on duct withRH sensor extending intoduct opening. Make suregasket is in place aroundsensor cage. Secure controlto duct using 2 screws inopenings provided.
• See wiring diagrams ontemplate and controlinstructions for 24 V controlconnections.
8. Humidifier will function withcold, hot, softened or unsoftenedwater. Hot water (140°F max) isstrongly recommended to providemaximum evaporative capacity.Saddle valve provided may beused to tap into water supply.See installation instructions onsaddle valve package. Saddlevalve is designed to be fullyopened or closed. Do not useto regulate flow.
9. Run 1/4” copper tubing fromsaddle valve to solenoid valve.DOUBLE-WRENCH TO PREVENTLEAKING. See Figure 3.
10. INSTALL DRAIN INACCORDANCE WITH LOCALCODES. Run 1/2” I.D. hosefrom drain spud to floor drain.Make sure drain has constantdownward slope and is notkinked. Do not over-tightenhose clamp onto drain spud.Do not use solvent adhesiveon drain spud.
11. Check humidifieroperation. Open saddle valveand turn control to highestsetting. Turn on furnace. Allowhumidifier to run until waterflows from drain. Make sureall electrical connections aresecure and all plumbingconnections are water-tight.Set control to proper setting.
