Carrier 73Y User Manual download pdf

HEATING & COOLING

73X,Y

1993 Room Air Conditioners

Start-Up and Service Instructions

CONTENTS

Page

START-UP.................................................................1

SERVICE ...................................................................1,2

General Notes

...........................................................

Compressor Replacement

.......................................

SAFETY REMINDERS

...............................................

PREVENTIVE MAINTENANCE

...............................

2-4

General .......................................................................2

System Cleaning/Flushing.......................................2

DISASSEMBLY INFORMATION .......................... 5 12

Filter Removal ...........................................................5

Front Grille Removal

...............................................

Control Box Removal.............................................. 5

Thermostat Bulb Heater Removal

........................

Mode Switch Control Removal............................... 7

Timer Assembly Removal

(Models 73YCA213P and 73YCA243P

Only)....................................................................... 7

Capacitor Removal ................................................. 7

Indicator Light Removal

(Models 73YCA213P and 73YCA243P

Only)....................................................................... 8

Indoor Thermostat Removal

.................................

Fan Cycle Switch (Energy Saver Switch)

Removal ................................................................. 8

Air Sweep Switch Removal

(Models 73YCA213P and 73YCA243P

Only)....................................................................... 8

Chassis Removal .................................................... 8

Air Sweep Motor Removal

(Models 73YCA213P and 73YCA243P

Only)....................................................................... 8

Evaporator and Condenser Coils Removal ... 8

Air Handling System Removal

..............................

Exhaust Door Removal

..........................................

Vent Door Removal

(Models 73YCA213P and 73YCA243P

Only)....................................................................... 9

Indoor Blower Wheel Removal

..............................

Outdoor Propeller Fan Removal............................ 10

Fan Motor Removal

...............................................

Compressor Removal ............................................ 11

Strainer Removal and Replacement

.....................

Electric Heater Assembly Removal

.....................

SERVICE POINTS ................................................... 13

TROUBLESHOOTING ..............................................14

START-UP

Refer to operating instructions in Owner’s Guide pro

vided with room air conditioner

SERVICE

General Notes — These Start-Up and Service Instruc

tions are provided to assist the trained and qualified service

technician in repairing or replacing components of Carrier

room air conditioner model offerings for 1993. These

instructions contain disassembly photos for the Models

73XC,XH, and YC. Unit physical data is found in

Tables 1-9.

IMPORTANT; Repairing and servicing air condition

ers can be hazardous for untrained individuals. The

instructions printed in this publication are for prop

erly trained and qualified Carrier service technicians

only.

A WARNING

Before working on any air conditioner, be sure to first

disconnect all electric power to the unit to avoid the

possibility of electrical shock and personal injury.

Discharge capacitors before disconnecting, by shorting

across terminals.

Shield coils with cardboard to protect hands against in

jury from sharp metal edges when removing compressor and

other components.

When disassembling wiring, use numbered stickers to iden

tify wire leads and terminals. This aids in quick, accurate

reassembly.

Check clearances around scroll and housing before in

stalling fans. Before securing fan(s) fasteners, rotate fan by

hand to ensure ample clearance.

Refer to Carrier Standard Service Techniques, Chapters

1 and 2, for information on checking motors; removing

refrigerant; adding oil; and evacuating, dehydrating, and charg

ing system. Pay particular attention to all safety warnings

for these procedures.

NOTE: In Carrier Standard Service Techniques, refrigerant

removal must always include reclaiming the refrigerant, not

allowing it to escape to the atmosphere.

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

BookM 14 PC 131 Catalog No 537-320 Printed in U S.A Form 73X,Y-1SS Pg 1 3-94 Replaces: New

Tab 8a 10a

1 2 ... 15

Summary of Contents

Page 1 - 1993 Room Air Conditioners

HEATING & COOLING73X,Y1993 Room Air ConditionersStart-Up and Service InstructionsCONTENTSPageSTART-UP...

Page 2 - A CAUTION

FAN MOTOR CLIP (SPRING)FANMOTORPARTITIONAIR HANDLING SYSTEM REMOVAL SCREW LEFT SIDE SCREW TOPREAR SIDE PARTITION SCREWFig. 17 — Removing Fan Motor Cli

Page 3 - Table 2 — Compressors

BLOWER WHEELPARTITION- SLOTSSPRING METAL CLIPPARTITIONSLOTSFig. 22 — Removing Blower WheeiSPRING METAL CLIPFig. 23 — Removing Outdoor Propeiler FanFan

Page 4

WIRES (2,'9- 25 Heater Assembly WiresMOUNTING BRACKETPLASTICaccessCOVERevaporatorH^TERWIRHFig. 26 - rho» 9 Chassis »i,h Elactn,! Haatarc12

Page 5 - A WARNING

SERVICE POINTS (Check Annually)1.3.5.Clean evaporator and condenser coils.Indoors — Use a hooked wire or bristle brush to remove dirt from

Page 6 - Fig. 6 — Removing Escutcheon

TROUBLESHOOTINGSYMPTOM AND PROBABLE CAUSEPROBABLE REMEDYCOMPRESSOR DOES NOT RUN Opening in Power Circuit1. Controi off2. Biown fuse3. Defective wirin

Page 7

Page 8

1Compressor Replacement — Stand dear of compressor terminals when working on compressors. With system under pressure, terminals may

Page 9

Table 1 — Physical and Electrical Data (Single Phase, 60 Hz) — 1993MODEL73CASING (See Table 6)CAPACITY (Btuh)*R-22 CHG (oz. ± .05)WETBULBAtFNAMEPLATEC

Page 10 - PARTITION SCREW

Table 3 — Heater AssembliesTable 6 — Casing Dimensions (in)HEATER ASSEMBLY (See Table 1)KILOWATTSPRIMARYLS(F)SECONDARYLS(F)VI1.6 140 200V22.8140 200V3

Page 11 - Fig. 24 - Removing Fan Motor

DISASSEMBLY INFORMATIONA WARNINGBefore working on any air conditioner, be sure to first disconnect all electric power to unit to avoid

Page 12 - Fig. 26 - rho» ■

7. Carefully pull control box straight out from unit.8. On right side and bottom of control box, manually disengage removable sheet meta

Page 13

Thermostat Bulb Heater Removal — Use carenot to damage sensing bulb or capillary of thermostat whenhandling bulb heater. See Fig. 7.1. Slide out cont

Page 14 - TROUBLESHOOTING

PIndicator Light Removal (Models 73YCA213P and 73YCA243P Only)12.Slide out control box. Refer to Control Box Removal instructions, page 5.

Page 15 - Tab

TOP GUSSETSCREW SECURING EVAP SCROLL TO EVAP TUBE SHEETFig. 14 — Removing ChassisCOMPRESSORTERMINALCOVEREVAPORATOR COILEVAPORATOR SCREW {1 OF 2)BASEPA

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Carrier 73Y User Manual

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