Carrier HEATING AND COOLING 58VUA User Manual download pdf

Condensing Heat Exchanger Kit

Installation Instructions

Part No. 312731-755 through -761

NOTE: Read the entire instruction before starting the installation.

INTRODUCTION

This instruction covers installation of a polypropylene-laminated

(PPL) steel condensing heat exchanger and collector box assembly

kit in an upflow condensing furnace. See Table 1 for furnace and

kit combinations.

NOTE: If this kit is used to replace a stainless steel condensing

heat exchanger in a Model 398A, Series B through F, or a 58SX,

Series 110 through 180 Furnace, some modifications to the vent

system or unit may be necessary. Refer to Step 6—Replacing a

stainless steel condensing heat exchanger with a PPL condensing

heat exchanger.

NOTE: Obtain a releasing agent (Pam or equivalent) and RTV

sealant (G.E. 122, 162, or Dow-Corning 738) before starting the

installation.

SAFETY CONSIDERATIONS

Installation and service of 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 and replacing filters. All other operations should

be performed by trained service personnel. When working on

heating equipment, observe precautions in literature, and on tags

and labels attached to the unit.

Follow all safety codes. Wear safety glasses and work gloves.

Have a fire extinguisher available.

Before beginning any installation or modification, be sure the

main electrical disconnect switch is in the OFF position.

Electrical shock can cause personal injury or death.

DESCRIPTION AND USAGE

This kit contains the following items:

Condensing heat exchanger assembly (1)

(includes collector box)

Inducer inlet gasket (1)

Stainless steel screws (in bag) (max 12)

Limit switch (in 312731-758 and -759 kits only) (1)

Limit shield (in 312731-758 kit only) (1)

Installation Instructions (1)

Table 1—Kit Usage

KIT PART NO.

FURNACE MODEL & SIZE

398A 58SX/SXA/SXC

320A/398B/

58SXB/58VUA

312731-755 030040 040-FG or BC —

312731-756 036040 040-GG or CC —

312731-761 036060 060-GG or CC —

312731-757 — — 060

312731-758

036080 080-GG or BC 080

048080 080-JG or CC 080

312731-759

048100 100-JG or CC 100

060100 100-LG or DC 100

312731-760 060120 120-LG or CC —

Step 1—Removal of Inducer Assembly

1. Turn OFF gas and electrical supplies to furnace.

2. Remove blower and control access doors.

3. Loosen hose clamp at vent pipe connection; disconnect vent

pipe. Position vent pipe out of way.

4. Disconnect electrical connector from inducer control box (if

used) and disconnect wires from pressure switch.

5. Disconnect inducer motor leads.

6. Disconnect edge connector from main control box at blower

shelf.

7. Remove screws securing main control box to blower shelf and

lay control box in bottom of furnace.

8. Loosen hose clamp and remove drain tube from bottom of

inducer housing (bottom side of blower shelf).

9. Loosen hose clamp, at pressure switch, on pressure tube from

plastic tee. Remove tube from pressure switch.

10. Loosen hose clamp, at collector box, on tube from pressure

switch. Remove tube from collector box.

11. Loosen hose clamp, at collector box, on drain tube from

inducer outlet elbow. Remove tube from collector box.

12. Remove and discard mounting screws securing inducer assem-

bly (motor, pressure switch, inducer housing, mounting

bracket, and inducer outlet elbow). Remove inducer assembly

from furnace. When necessary, remove screw securing motor

ground wire to blower shelf.

13. Remove inducer controller (if used) on left side of casing.

Step 2—Removal of Condensing Heat Exchanger and

Collector Box Assembly

1. Loosen hose clamp on 7/8-in. OD drain tube at collector box;

remove tube.

2. Pull drain tube down into blower compartment.

3. Remove drain tube grommet from blower shelf.

4. Remove screw securing wire harness to blower shelf.

Cancels: IIK 398A-40-2 IIK 398A-40-27

3-15-92

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. 565-956 Printed in U.S.A. Form 58SX-28SI Pg 1 2-92 Replaces: 58SX, SXB-1SI

1 2 3 4 5 6

Summary of Contents

Page 1 - Installation Instructions

Condensing Heat Exchanger KitInstallation InstructionsPart No. 312731-755 through -761NOTE: Read the entire instruction before starting the installati

Page 2

5. Remove screws securing coupling box (box with thick insu-lation) to cell panel and condensing heat exchanger. Do notremove screws through insulatio

Page 3

a. Loosen tube clamps and remove 5/8-in. and 7/8-in. draintubes from condensate trap.b. Using backup wrench, disconnect condensate drain pipe atcoupli

Page 4 - 4 IN. FROM

Fig. 1—Front View of Condensing Heat Exchanger AssemblyA83157Fig. 2—Inside View of Coupling BoxA83158Fig. 3—Backside of Inducer Assembly HousingA86100

Page 5

Table 3—Maximum Allowable Pipe Length (Ft)ALTITUDE (FTABOVE SEA LEVEL)FURNACESIZEPIPESIZE (IN.)NUMBER OF 90° ELBOWS1 2 3 4 5 60 to 2000030040/040-FG 2

Page 6 - Tab 6a 8a

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