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Carrier 336774-752-CBP Installation Instructions Manual

Condensing heat exchanger kit for use with 35 - in. condensing gas furnace
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336774---752---CBP thru
336774---778---CBP
NOTE: Read the entire instruction manual before starting the
installation.
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, 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.
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
included in literature and attached to the unit.
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.
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.
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.
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.
WARNING
!
FIRE, EXPLOSION, ELECTRICAL SHOCK
HAZARD
Failure to follow this warning could result in personal injury,
death and/or property damage.
The ability to properly perform maintenance on this equipment
requires certain knowledge, mechanical skills, tools, and
equipment. If you do not possess these, do not attempt to
perform any maintenance on this equipment other than those
procedures recommended in the User's Manual.
Installation Instructions
Consult local
CONDENSING HEAT EXCHANGER KIT
CONDENSING GAS FURNACE
WARNING
!
FIRE,
EXPLOSION,
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury,
death and/or property damage.
Improper
installation,
maintenance, or use can cause carbon monoxide poisoning,
explosion, fire, electrical shock, other conditions, which could
result in personal injury or death. Consult your distributor or
branch for information or assistance. The qualified installer or
agency must use only factory- -authorized kits or accessories
when servicing this product.
WARNING
!
ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal injury or
death, or property damage.
Before installing, modifying, or servicing system, main electrical
disconnect switch must be in the OFF position and install a
.
lockout tag. Check accessories and cooling unit for additional
electrical supplies that must be shut off during the furnace
servicing. There may be more than one disconnect switch. Lock
out and tag switch with a suitable warning label. Verify proper
operation after servicing.
!
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and
wear appropriate protective clothing and gloves when
handling parts
INTRODUCTION
This instruction covers installation of the Condensing Heat
Exchanger Kit, Part No. 336774- -752- -CBP thru - -778- -CBP in
35- -in. (889 mm) tall, condensing gas furnaces.
NOTE: DO NOT use a releasing agent on parts that will be sealed
with RTV.
NOTE: DO NOT substitute any other type of RTV sealant for
those listed below.
There are two different RTV sealants used on this assembly and are
needed before starting the assembly.
The low adhesion sealant used on the Condensing Heat Exchanger
Kit is Novaguard RTV 400- -900 (Part Number PF680004). If the
high adhesion sealant is used, also use a releasing agent such as
cooking spray (must not contain corn oil, canola oil, halogenated
hydrocarbons nor aromatic contents to prevent inadequate seal
from occurring). Novaguard 400- -303 RTV (Part Number
PF680003), G.E. 162, G.E. 6702, or Dow- -Corning 738 are
approved high adhesion silicone.
DO NOT substitute any other type of RTV sealant.
1
FOR USE WITH 35---IN.
ELECTRICAL
SHOCK
adjustment,
alteration,
CAUTION
AND
service,

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Summary of Contents for Carrier 336774-752-CBP

  • Page 1 CONDENSING HEAT EXCHANGER KIT 336774---752---CBP thru FOR USE WITH 35---IN. 336774---778---CBP CONDENSING GAS FURNACE Installation Instructions NOTE: Read the entire instruction manual before starting the WARNING installation. SAFETY CONSIDERATIONS FIRE, EXPLOSION, ELECTRICAL SHOCK Improper installation, adjustment, alteration, service, maintenance, CARBON MONOXIDE POISONING HAZARD or use can cause explosion, fire, electrical shock, or other Failure to follow this warning could result in personal injury, conditions which may cause death, personal injury, or property...
  • Page 2: Description And Usage

    DESCRIPTION AND USAGE Pressure Switch Removal NOTE: There are two types of pressure switches. The modulating Use this Condensing Heat Exchanger kit to replace a failed condensing heat exchanger. This Condensing Heat Exchanger Kit pressure switch assembly has three pressure switches. Two are contains the following items.
  • Page 3: Cut Hazard

    NOTE: If condensate has a heat pad attached to the trap, trace the Separate Primary and Condensing Heat Ex- wires for the pad back to the connection point and disconnect the changers wires for the heat pad. 1. Remove the screws that attach the condensing heat ex- 3.
  • Page 4 4. Bend the straight end of the turbulator strip over 90 degrees Heat Exchanger Assembly Installation to hold the turbulator in the secondary heat exchanger tube. 1. Lift the heat exchanger assembly and set the rear of the as- Install Containment Plate sembly on the blower deck.
  • Page 5: Fire Or Explosion Hazard

    1. Align the trap with the drain outlet on the collector box. 7. Connect the wires to the flame sensor and hot surface ig- niter. 2. Secure the trap to the collector box with the screw. 8. Connect the connector harness from gas valve (Modulating 3.
  • Page 6 7. If any status codes are flashed, refer to status code label on firing rate as shown on rating plate by clocking the gas meter. unit blower door. S Over- -firing/high Btu input: Set manifold pressure and verify 8. Turn thermostat fan switch to “ON”, “Continuous” or jump- firing rate as shown on rating plate by clocking the gas meter.
  • Page 7 Inducer Mounting Screw Remove Tube(s) from Inducer Mounting Screw Standoffs Vent Elbow Clamp Remove Vent Elbow Inducer Mounting Screw Inducer Mounting Screw Pressure Switch J-BOX Pressure Switch LOCATIONS Mounting Screw A11361 Fig. 3 - - Loosen Vent Pipe Clamp J−BOX MOUNTING SCREWS J−BOX...
  • Page 8 (SEE DETAIL G) CELL PANEL (SEE DETAIL F) HEAT EXCHANGER COUPLING BOX COVER DETAIL F DETAIL G A13103 Fig. 5 - - Condensing Heat Exchanger Removal / Installation...
  • Page 9 A11438 Fig. 6 - - Heat Exchanger Panel Assembly...
  • Page 10 SILICONE SEALER SILICONE SEALER A11416 Fig. 7 - - Containment Plate and Collector Box Sealant Application Catalog No: IIK---336774---09 Copyright 2019 CAC / BDP D 7310 W. Morris St. D Indianapolis, IN 46231 Edition Date: 04/19 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. Replaces: IIK--- 336774--- 08...

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