Carrier 58DFA User Manual download pdf

Inducer Motor

Replacement Kit

Installation Instructions

Part No. 318984-753

NOTE: Read the entire instruction manual before starting the

installation.

This symbol → indicates a change since the last issue.

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.

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.

INTRODUCTION

This instruction covers the installation of the inducer motor

replacement kit Part No. 318984-753 in models 373LAD/LAV,

376AAW/BAW/CAV, 383KAD/KAV, 393AAV, 394HAD,

395AAW/BAW/CAV, 396HAD, 480BAV, 481BAV,

58DHB/DHC, 58DFA/GFA, 58PAP/RAP, 58PAV/RAV,

58SC/SSB/SSC, 58WAV/ZAV, 58YAV, GA1AAD, GA2AAD,

GB1AAV, GB3AAV, PG8DAA, and PG8UAA Gas Furnaces.

DESCRIPTION AND USAGE

The inducer motor replacement kit can be used for repairs (or

upgrades) to the inducer motor assembly on ONLY the models

listed in Step 2, item 6.

The inducer motor replacement kit contains the following items:

Inducer Motor Assembly 1

Harness Adapter (Molex) 1

Harness Adapter (AMP) 1

Installation Instructions 1

INSTALLATION

Step 1—Remove Inducer Motor Assembly

1. Set room thermostat to OFF and allow system to complete any

blower off delay.

2. Turn off gas and electrical supplies to unit.

3. Remove blower and control access doors.

4. Unplug inducer motor.

5. Remove 3 assembly mounting screws and remove inducer

motor assembly (motor, wheel, and mount) from inducer

housing. Be careful not to damage inducer wheel during

removal.

6. Measure location of wheel to motor support to use when

reassembling. Using an allen wrench, loosen inducer wheel

setscrew, and remove wheel from motor shaft. (See Fig. 1.)

NOTE: If it is difficult to remove the wheel, lightly sand any

scale or rust buildup from end of motor shaft. Apply a small

amount of penetrating oil to shaft and hub. Tap lightly on hub only.

Do not tap or pry on any other areas of wheel. If the wheel cannot

be removed without damage, a replacement wheel is required.

7. Remove 3 motor grommet screws securing motor plate to

motor support.

8. Remove 2 screws securing motor to motor plate.

Step 2—Install New Inducer Motor Assembly

1. Attach new inducer motor assembly provided in kit to motor

plate using original screws.

2. Attach motor support to motor plate through 3 grommets using

3 original screws. (See Fig. 2.) If there was a shaft seal

between the plate and support, be certain it is moved to the

new assembly. Tighten original screws firmly, but avoid

stripping.

3. Reinstall inducer wheel. Wheel must be located as shown in

Fig. 1. Align flat on shaft to line up with setscrew, then firmly

tighten setscrew.

4. Install inducer motor assembly in inducer housing and fasten

with 3 original mounting screws. Ensure that inducer motor

ground wire is reinstalled under 1 of mounting screws.

NOTE: The 3 original mounting screws are shorter in length than

the other screws. Use of longer screws may result in interference

between the screws and the inducer wheel.

5. After all screws are tightened, spin black plastic cooling fan to

ensure assembly moves freely. If assembly does not spin

freely, remove inducer motor assembly from inducer housing

and verify correct location of inducer wheel on motor shaft.

6. Connect inducer motor to wiring harness. Adapters are in-

cluded for all applications. Use adapter (if needed) according

to type of connector on original main wiring harness.

For 376AAW/BAW, 395AAW/BAW, 58SC, 58SSB, and

58DHB Furnaces, use adapter with 1/4-in. quick connects and

AMP connector. (See Fig. 3.)

Use the quick Molex adapter for the following models: (See

Fig. 4.)

373LAD Series A and B 373LAV Series A

376CAV Series A and B

383KAD Series A and B

383KAV Series A

394HAD Series A

Cancels: IIK 373L-55-5 IIK 373L-55-6

6-98

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. 535-705 Printed in U.S.A. Form 58DFA-20SI Pg 1 6-98 Replaces: 58DFA-18SI

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1 2

Summary of Contents

Page 1 - Installation Instructions

Inducer MotorReplacement KitInstallation InstructionsPart No. 318984-753NOTE: Read the entire instruction manual before starting theinstallation.This

Page 2 - Fig. 4—Molex Connector

395CAV Series A and B396HAD Series AGA1AAD Series AGA2AAD Series A 58DFA Series 10158DHC All series58GFA Series 10158PAP Series 101 and 11158PAV Serie

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