Carrier 58DXT- User Manual

Heat Exchanger Cell

Replacement Kit

Installation Instructions

Part No. 310203-752

NOTE:

Read the entire instruction manual before starting the

installation.
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indicates a change since the last issue.

INTRODUCTION

This instruction covers the installation of the heat exchanger cell
kit Part No. 310203-752 in models 330AAV, 330JAV, 331AAV,
331JAV, 333BAV, 333JAV, 373LAV, 376CAV, 383KAV,
393AAV, 394HAD, 395CAV, 396HAD, 480BAV, 481BAV,
58DFA, 58DHC, 58DXT, 58GFA, 58PAP, 58PAV, 58RAP,
58RAV, 58SSC, 58TMA, 58TUA, 58UHV, 58UXT, 58UXV,
58WAV, 58YAV, 58ZAV, GA1AAD, GA2AAD, GB1AAV,
GB3AAV, PG8DAA, and PG8UAA Gas Furnaces.

NOTE:

A releasing agent (PAM cooking spray or equivalent,

must not contain corn or canola oil, aromatic or halogenated
hydrocarbons or inadequate seal may occur.) and RTV sealant
(G.E. 162 or Dow-Corning 738) are needed before starting
installation. DO NOT substitute any other type of RTV sealant.

SAFETY CONSIDERATIONS

Installing and servicing heating equipment can be hazardous due to
gas and electrical components. Only trained personnel should
install or service heating equipment.

Untrained personnel can perform basic maintenance functions
such as cleaning coils, or cleaning and replacing filters. All other
operations should be performed by trained service personnel.
When working on heating equipment, observe precautions in the
literature, on tags, and on labels attached to the unit.

Recognize safety information. This is the safety-alert symbol

.

When you see this symbol on the furnace and in instructions or
manuals, be alert to the potential for personal injury.

Understand the signal words DANGER, WARNING, and CAU-
TION. These words are used with the safety-alert symbol. DAN-
GER identifies the most serious hazards which will result in severe
personal injury or death. WARNING signifies a hazard which
could result in personal injury or death. CAUTION is used to
identify unsafe practices which would 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.

Follow all safety codes. Wear safety glasses and work gloves.
Have a fire extinguisher available.

DESCRIPTION AND USAGE

The heat exchanger cell replacement kit can be utilized to restore
units having heat exchanger cells that require repair.

This heat exchanger cell replacement kit contains the following
items:

Heat exchanger cell

1

Fiberglass gasket

2

Screw

9

Installation Instructions

1

INSTALLATION

Step 1—Remove Heat Exchanger Assembly

1. Turn off gas and electrical supplies to unit.

2. Remove blower and control access doors.

3. Disconnect and remove vent pipe.

4. On hot surface ignition models:

a. Unplug control box connectors from blower deck.

b. Unplug inducer motor.

c. Disconnect wires from pressure switch, draft safeguard

switch, and primary limit switch.

d. Remove wires from retainer clip on casing side.

NOTE:

On hot surface ignition models, it is not necessary to

disconnect wires from gas valve, limit over temperature switch,
hot surface ignitor, or flame sensor.

5. On continuous-pilot models, disconnect all gas control com-

partment wiring and carefully feed wires down through the
blower deck into the blower compartment.

6. Remove burner control assembly mounting screws and re-

move assembly from furnace. Be careful not to damage hot
surface ignitor or flame sensor if applicable.

7. Remove screws securing relief box to top plate (upflow) or to

blower shelf (downflow/horizontal).

8. Remove screws securing inducer assembly to cell panel and

remove inducer assembly from furnace.

9. Remove auxiliary junction box and blower door interlock

switch.

10. Remove screws securing cell panel to casing.

11. If necessary, remove 2 front screws of top plate (upflow) or 2

screws of bottom plate (downflow/horizontal).

12. Remove cell panel and attached heat exchanger cells through

front of furnace.

Step 2—Install Replacement Cell(s)

1. Determine which cell(s) need to be replaced.

2. Place heat exchanger on a flat surface with cell panel facing

upward.

3. Remove 8 screws from cell opening of cell(s) being replaced.

Remove and replace 1 cell at a time.

NOTE:

The word "top" is stamped on cell inlet plates to aid in

correct assembly.

Cancels: IIK 373L-35-19

IIK 373L-35-20

11-98

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book 1

4

Tab

6a 8a

PC 101

Catalog No. 535-717

Printed in U.S.A.

Form 58DFA-22SI

Pg 1

11-98

Replaces: 58DFA-19SI

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