Carrier Appliance Trim Kit 320720 751 THRU 761 User Manual

320720---751 thru ---761  
Primary Cell Inlet Panel Kit  
Installation Instructions  
NOTE: Read the entire instruction manual before starting the  
installation.  
!
CAUTION  
SAFETY CONSIDERATIONS  
CUT HAZARD  
Improper  
installation,  
adjustment,  
alteration,  
service,  
Failure to follow this caution may result in personal injury.  
maintenance, or use can cause explosion, fire, electrical shock, or  
other conditions which may cause death, personal injury, or  
property damage. Consult a qualified installer, service agency, or  
your distributor or branch for information or assistance. The  
qualified installer or agency must use factory--authorized kits or  
accessories when modifying this product. Refer to the individual  
instructions packaged with the kits or accessories when installing.  
Sheet metal parts may have sharp edges or burrs. Use care  
and wear appropriate protective clothing, safety glasses and  
gloves when handling parts and servicing furnaces.  
Follow all safety codes. Wear safety glasses, protective clothing,  
and work gloves. Have a fire extinguisher available. Read these  
instructions thoroughly and follow all warnings or cautions  
include in literature and attached to the unit. Consult local  
building codes, the current editions of the National Fuel Gas  
Code (NFGC) NFPA 54/ANSI Z223.1 and the National  
Electrical Code (NEC) NFPA 70.  
!
CAUTION  
UNIT DAMAGE HAZARD  
Failure to follow this caution may result in improper and  
dangerous operation.  
Label all wires prior to disconnection when servicing  
controls.  
In Canada, refer to the current editions of the National Standards  
of Canada CAN/CSA--B149.1 and .2 Natural Gas and Propane  
Installation Codes, and Canadian Electrical Code CSA C22.1  
INTRODUCTION  
Recognize safety information. This is the safety--alert symbol  
When you see this symbol on the unit and in instructions or  
manuals, be alert to the potential for personal injury.  
.
This instruction covers installation of the Primary Cell Inlet Panel  
Kit Part No. 320720--751, --753, --754, --755, --756, --757, --758,  
--760 and --761 in 40--in. (1016 mm) tall, condensing gas  
furnaces. See Table 1 for kit usage.  
Understand the signal words DANGER, WARNING, and  
CAUTION. These words are used with the safety--alert symbol.  
DANGER identifies the most serious hazards which will result in  
severe personal injury or death. WARNING signifies hazards  
which could result in personal injury or death. CAUTION is  
used to identify unsafe practices which may result in minor  
personal injury or product and property damage. NOTE is used  
to highlight suggestions which will result in enhanced  
installation, reliability, or operation.  
NOTE: A releasing agent such as PAM cooking spray or  
equivalent (must not contain corn or canola oil, halogenated  
hydrocarbons nor aromatic contents to prevent inadequate seal)  
and RTV sealant (G.E. 162, G.E. 6702, or Dow--Corning 738)  
are needed before starting installation. DO NOT substitute any  
other type of RTV sealant. G.E. 162 (P771--9003) is available  
through RCD in 3--oz tubes.  
DESCRIPTION AND USAGE  
Use this Primary Cell Inlet Panel Kit when replacement of a  
factory--installed primary cell inlet panel is required.  
!
WARNING  
FIRE, EXPLOSION AND ELECTRICAL SHOCK  
HAZARD  
This Primary Cell Inlet Panel Kit contains the following items:  
Failure to follow this warning could result in personal  
injury, death and/or property damage.  
Primary Cell Inlet Panel  
Burner Box Gasket  
Cell Mounting Screw No. 8D X 3/8--in.(10 mm) 25 max  
Installation Instructions  
1
1
Before installing or servicing system, always turn off main  
electrical and gas supplies to unit and tag with appropriate  
lockout. There may be more than one disconnect switch.  
1
1
 
PRIMARY HEAT  
EXCHANGER  
(BEHIND CELL  
INLET PANEL)  
BURNER  
COMBUSTION-AIR  
INTAKE  
ENCLOSURE  
CONNECTION  
BURNER  
GAS VALVE  
GAS VALVE  
ENCLOSURE  
COMBUSTION-  
AIR INTAKE  
CONNECTION  
AUXILIARY  
JUNCTION BOX  
PRIMARY HEAT  
EXCHANGER  
(BEHIND CELL  
INLET PANEL)  
CAP AND  
CLAMP  
(UNUSED  
DRAIN  
CONN.)  
INDUCER  
MOTOR  
AUXILIARY  
JUNCTION BOX  
VENT OUTLET  
CONDENSING  
HEAT  
EXCHANGER  
(BEHIND CELL  
INLET PANEL)  
CAP AND  
CLAMP  
VENT OUTLET  
INDUCER MOTOR  
WIRE  
(UNUSED  
DRAIN  
CONNECTOR  
CONNECTION)  
VENT  
OUTLET  
PRESSURE  
SWITCHES  
CONDENSING  
HEAT  
EXCHANGER  
(BEHIND CELL  
INLET PANEL)  
VENT OUTLET  
PRESSURE  
SWITCHES  
INDUCER MOTOR  
CONTROL  
CENTER  
CONTROL  
CENTER  
CONDENSATE  
TRAP  
BLOWER  
INDUCER  
HOUSING  
DRAIN TUBE  
ACCESS PANEL  
SAFETY  
BLOWER  
ACCESS  
PANEL  
SAFETY  
INTERLOCK  
SWITCH  
MOTOR AND  
BLOWER  
ASSEMBLY  
INTERLOCK  
SWITCH  
CONDENSATE  
TRAP  
AIR FILTER AND  
RETAINER  
AIR FILTER  
AND RETAINER  
MOTOR AND  
BLOWER ASSEMBLY  
A01026  
A93407  
Fig. 1 -- Two--Stage, Two--Speed and Fixed--Capacity  
Model(s) in Upflow Orientation  
Fig. 2 -- Variable--Speed Model in Upflow Orientation  
NOTE: Visually check location of main limit and shield to  
ensure shield is not touching primary cells. If shield is touching,  
short cycling of limit will occur.  
Remove Inducer Assembly  
1. If not previously disconnected, disconnect inducer motor  
wire connector at quick--connect.  
2. If not previously disconnected, disconnect pressure switch  
wires.  
3. Remove collector box pressure switch tube from pressure  
switch.  
4. Remove four screws attaching inducer housing to cell pan-  
el.  
8. Reinstall condensing heat exchanger assembly to primary  
cell inlet panel.  
Reinstall Inducer Assembly  
1. Inspect connector box gasket where inducer housing will  
mate.  
NOTE: If gasket is damaged in any way, it must be repaired. To  
repair, apply a small bead of G.E. RTV 162, G.E. 6702, or  
Dow--Corning RTV 738 to damaged gasket area. Apply sealant  
releasing agent such as PAM cooking spray or equivalent (must  
not contain corn nor canola oil, halogenated hydrocarbons or  
aromatic content to prevent inadequate sealing) to inducer  
housing mating surface.  
NOTE: Inducer housing, inducer motor, and pressure switch(es)  
should be removed as 1 assembly.  
Install Primary Cell Inlet Panel  
1. Remove four screws attaching condensing heat exchanger  
assembly to primary cell inlet panel.  
2. Remove screws attaching primary cells to primary cell in-  
let panel.  
2. Attach inducer assembly to cell panel by aligning four  
screws through inducer housing spacers. Tighten screws to  
secure.  
3. Remove main limit and shield from primary cell inlet pan-  
el. Note orientation of shield and direction of main limit  
for reassembly.  
3. Attach collector box pressure switch tube to pressure  
switch. See tubing diagram of furnace for proper location  
attachment.  
4. Remove primary cell inlet panel by lifting panel off con-  
densing heat exchanger collector box.  
4. If control was removed from furnace with whole cell panel  
assembly, reconnect inducer motor wire connector at  
quick--connect.  
5. Slide new inlet cell panel over condensing heat exchanger  
collector box.  
5. If control was removed from furnace with whole cell panel  
assembly, reconnect pressure switch wires. Refer to wiring  
diagram on furnace for proper attachment.  
6. Attach primary cell inlet panel to primary cells by doing  
the following:  
a. Center primary cell inlet panel over primary cell open-  
ings.  
Reinstall Burner Enclosure Assembly  
1. Position burner enclosure gasket between the burner box  
and inlet cell panel and secure burner box on inlet cell  
panel using screws removed earlier.  
b. Use an awl to align holes and start ALL screws  
(provided in kit) in primary cells.  
c. After all screws are started, check position of fiberglass  
gasket and tighten screws in cells.  
2. Connect pressure tube to gas valve.  
3. Inspect gasket, then install intake housing on burner en-  
closure.  
7. Install main limit and shield in primary cell inlet panel.  
3
 
COLD SPOT  
BAFFLE  
COUPLING  
BOX  
PRIMARY  
CELL  
PRIMARY CELL  
INLET PANEL  
MAIN LIMIT  
SHIELD  
T-TABS  
MAIN LIMIT  
BURNER  
ENCLOSURE  
GASKET  
BLOWER  
SHELF  
CONDENSING  
HEAT EXCHANGER  
CELL REAR PANEL  
CONDENSING  
HEAT EXCHANGER  
ASSEMBLY  
PRIMARY CELL  
OUTLET PANEL  
PRESSURE  
SWITCH  
NOTE: ACTUAL COMPONENT LOCATION MAY VARY  
DEPENDING ON MODEL & SERIES.  
BURNER  
ENCLOSURE  
INDUCER  
MOTOR  
AND GAS VAVLE  
A05128  
Fig. 3 -- Expanded View of Heat System Components in Upflow Orientation  
NOTE: If gasket is damaged in any way, it must be repaired. To  
repair, apply a small bead of G.E. RTV 162, G.E. 6702, or  
Dow--Corning RTV 738 to damaged gasket area. Apply sealant  
releasing agent such as PAM cooking spray or equivalent (must  
not contain corn nor canola oil, halogenated hydrocarbons or  
aromatic content to prevent inadequate sealing) to burner  
enclosure mating surface.  
NOTE: When reinstalling condensing heat exchanger assembly,  
the lower flange of the condensing heat exchanger cell rear panel  
must engage on the T--tabs in rear blower shelf. (See Fig. 3.)  
3. Install three screws to each side of inlet cell panel and into  
cell panel supports.  
4. If previously removed, reinstall control center in casing  
flange.  
4. Connect pressure tube to intake housing.  
Reinstall Whole Cell Panel Assembly  
5. If control center is located in burner compartment or fur-  
nace, reinstall blower motor leads, transformer wires, door  
switch wires, and auxiliary limit switch wires (if present)  
through blower shelf and grommet.  
!
CAUTION  
6. If control is located in blower compartment of furnace,  
pull wires to flame sensor, hot surface igniter, overtemper-  
ature switch, gas valve, pressure switch(es), inducer motor,  
limit switch, and J--box through blower shelf.  
PERSONAL INJURY HAZARD  
Failure to follow this caution may result in personal injury.  
Whole cell panel assembly is heavy. Get help to lift and  
install.  
7. Install J--box.  
8. Reattach wires to control center or components. See wir-  
ing diagram on furnace for proper attachment.  
1. Install whole cell panel assembly with heat exchanger,  
burner box, inducer assembly, J--box (if applicable), and  
control center (if applicable) through front of furnace.  
9. Reinstall condensate trap where previously installed fur-  
nace casing or blower shelf.  
10. Reconnect condensate trap drain tubes. See tubing dia-  
gram on furnace for proper tube location.  
!
WARNING  
11. Connect field drain to condensate trap.  
NOTE: Ensure tubes are not kinked or pinched, as this will  
affect operation.  
FIRE AND UNIT OPERATION HAZARD  
Failure to follow this warning could result in personal  
injury, death and / or property damage.  
12. Connect vent pipe by inserting pipe into coupling, elasto-  
meric (rubber) coupling, and then fully into inducer hous-  
ing outlet.  
13. Connect combustion--air intake pipe to intake housing and  
install screw to secure. Do not use RTV unless previously  
used.  
DO NOT cut or tear foil face insulation. If cuts or tears  
occur, repair insulation with foil tape.  
2. Secure whole cell panel assembly to blower shelf by in-  
stalling two screws through blower housing (four screws  
on 120 and 140 sizes) and two screws next to blower  
housing.  
14. Install top filler panel.  
15. Install gas supply pipe to gas valve using backup wrench.  
4
 
NOTE: Use propane gas--resistant pipe dope to prevent gas leaks  
DO NOT use Teflon tape.  
!
WARNING  
EXPLOSION AND FIRE HAZARD  
Failure to follow this warning could result in personal  
injury, death and/or property damage.  
For upflow or downflow applications, gas valve knob  
or switch must be facing forward or tipped to the UP  
position.  
16. Connect field power supply to J--box.  
17. Install blower access panel.  
18. Turn on gas and electrical supplies to furnace.  
19. Check for gas leaks.  
!
WARNING  
EXPLOSION AND FIRE HAZARD  
Failure to follow this warning could result in personal  
injury, death, and/or property damage.  
Never test for gas leaks with an open flame. Use a  
commercially available soap solution made specifically for  
the detection of leaks to check all connections.  
20. Check furnace operation through two cycles.  
21. Check for condensate leaks.  
22. Replace furnace door.  
5
 
Printed in U.S.A.  
Edition Date: 09/10  
Copyright 2010 CAC / BDP S 7310 W. Morris St. S Indianapolis, IN 46231  
Catalog No: IIK320720---005  
Replaces: IIK320720--004  
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.  
6
 

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