ICP NAHA00601WK, Installation Instructions Manual

Page 1: ...d safety codes In some instances these instructions exceed certain local codes and ordinances especially those that may not have kept up with changing residential construction practices We require the...

Page 2: ...ion The damper should not create undue restriction in the open position All furnaces must be installed to ensure sufficient return air to both furnaces S For upflow furnaces A combination of one full...

Page 3: ...nnot obstruct access to either furnace Example 2 8 MIN Common Return Air Plenum Return Air Plenum Return Air Plenum Twinned Furnace Common Supply Air Plenum A02223 Figure 2 Downflow Horizontal Ductwor...

Page 4: ...al CAUTION 1 Disconnect all power to the furnace DO NOT TOUCH THE CONTROL OR ANY WIRE CONNECTED TO THE CONTROL PRIOR TO DISCHARGING YOUR BODY S ELECTROSTATIC CHARGE TO GROUND 2 Firmly touch a clean un...

Page 5: ...le Stage and Two Stage with PSC Blower Model Numbers A B C D FLUE CABINET WIDTH in mm OUTLET WIDTH in mm TOP AND BOTTOM FLUE COLLAR in mm BOTTOM INLET WIDTH in mm FLUE COLLAR in mm SHIP WT KG 0451408...

Page 6: ...approximately 1 in 25 mm below discharge flange from inside top of discharge opening and through both furnaces See Figure 6 Drill two 1 8 in holes approximately 1 in 25 mm below return air flange from...

Page 7: ...10 Drive 1 factory supplied No 6 X 3 4 in LG screw through each hole and tighten until furnaces are secure and foam strips have sealed gap between furnaces 11 Connect return and supply air ducts to f...

Page 8: ...drawing of twinned furnaces and their connection locations 1 Select 2 identical heating and airflow furnaces See Table 2 2 Remove outer door and blower access door 3 Remove bottom closure panels from...

Page 9: ...ace from left hand side to right hand side if required Refer to furnace installation instructions for complete details 13 Go to PROCEDURE 2A for Single Stage Furnaces or PROCEDURE 2B for Two Stage Fur...

Page 10: ...recommended for wood trusses unless approved by the truss manufacturer or other approved engineering methods 1 Furnaces may be suspended using two 2 pieces of 1 1 2 in x 1 1 2 in x 1 4 in thick cold r...

Page 11: ...e no connections between the R 24 vac connector in 1 furnace and the R 24 vac connector in other furnace WARNING See Electrostatic Discharge Precaution Section The twinning kit can be used for single...

Page 12: ...e Extension Harness 4 Install Auxiliary Limit Switch ALS S on Secondary furnace a Drill 1 8 in hole in blower housing 12 in 305 mm below blower shelf See Figure 13 b Position ALS S with terminals faci...

Page 13: ...16 B All Two Stage Models F8MTL G8MTL Two Speed Non Condensing HSI Furnaces with PSC Motors See Electrostatic Discharge Precaution Section The twinning kit can be used for single stage or two stage he...

Page 14: ...de by side route loose ends of 4 wire harness from Secondary furnace to Main furnace through snap bushings previously installed between furnaces f Connect Secondary 4 wire harness into 4 wire Main har...

Page 15: ...s the furnaces allowing them to operate as a single furnace The L1 black connection to each furnace must be connected to circuit breakers connected to the same service panel 115 vac phase leg On singl...

Page 16: ...6 101 on outside of blower access door of RH furnace blower door 5 Turn on power and gas to both furnaces 6 Reinstall blower access doors on both furnaces 7 Operate furnaces through 2 cycles in each m...

Page 17: ...443 06 2403 01 Specifications subject to change without notice Figure 16 Single Stage Furnace and A C Two Stage Thermostat Figure 17 Two Stage Furnaces and 1 Stage A C Unit One or Two Stage Thermosta...

Page 18: ...INALS HUM XFMR HUMIDIFIER TERMINAL 115 VAC 120 180 90 150 SPARE2 J2 JUMPER J2 HUM 24VAC BLW SPARE1 SPARE2 L2 NEUTRAL EAC 1 AMP IND HSI P2 L1 Figure 19 Two Stage Furnace Control SETUP SWITCHES THERMOST...

Page 19: ...t disconnect TKR yellow wire labeled TEST from LH furnace control TEST TWIN terminal After removing yellow wire component test can be initiated on each furnace individually as stated in Installation S...

Page 20: ...20 443 06 2403 01 Specifications subject to change without notice Figure 20 Wiring Diagram for Single Stage Non Condensing Furnaces...

Page 21: ...21 443 06 2403 01 Specifications subject to change without notice Figure 21 Wiring Diagram for Two Stage Non Condensing Furnaces...

Page 22: ...22 443 06 2403 01 Specifications subject to change without notice Copyright 2018 International Comfort Product S PO Box 128 S Lewisburg TN 37091 USA...