Carrier 73Y User Manual
73X,Y
HEATING & COOLING
Start-Up and Service Instructions
CONTENTS
Page
START-UP.................................................................1
SERVICE ...................................................................1,2
General Notes
Compressor Replacement
SAFETY REMINDERS
PREVENTIVE MAINTENANCE
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
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1
2
2
2-4
5
7
8
9
9
10
11
11
11
1993 Room Air Conditioners
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
Compressor Replacement — Stand dear of com
pressor terminals when working on compressors. With sys
tem under pressure, terminals may blow. Observe the same
.safety procedures for rotary compressors as for reciprocat
ing compressors.
When changing compressors:
1. Follow all safety codes. Reminder, use protective
goggles, work gloves, and water-soaked quenching
cloth
2. Shut off all electrical power to unit by removing power
cord from outlet, then disconnect all wiring from the
compressor.
3. Apply field-supplied tap-a-lines to the true (closest to
compressor) suction and discharge connections of the
compressor.
Recover the refrigerant charge from the unit. After re
4.
covering, cut the discharge and suction line process tubes
below the tube crimps. If you choose a good tubing
location for cutting the refrigerant lines initially, the
location is easily accessible when making the final joints.
You can braze the oil piping stub into the new com
pressor fittings more easily before the compressor is
put back into the unit.
A CAUTION
Oil vapor in piping stubs can ignite from torch flame
and cause serious injury. Exercise extreme care when
brazing, and keep brazing cloth and fire extin
guisher handy for emergency use.
5. Connect a nitrogen supply to the unit at one of the tapa-line connectors (5 psig maximum flow), leaving the
other connector open to the atmosphere. Braze angle
valves with stubs to each process tube.
6. Remove compressor from unit. Refer to Compressor
Removal, page 11.
7. Remove tap-a-llnes from suction and discharge lines
Carefully braze the holes closed from where the tap-alines were removed.
8. Clean system: add or replace liquid line filter drier.
For proper cleaning and flushing, use the Carrier
Totalclaim® reclaim system or a comparable refrig
erant recycling system.
9. Install new compressor and braze into place with fieldsupplied copper slip couplings.
10. Connect wiring: replace wire terminals if necessary.
11. Proceed with evacuation and charging. Pinch off lines
where angle valves were added. Cut off angle valves
above pinch-off, and braze tubes.
12. Start up unit.
SAFETY REMINDERS
1. Carry a fire extinguisher in your truck. Keep it within
reach when using a torch. Check fire extinguisher peri
odically to be sure it is fully loaded and functional.
2. Know how to handle oxyacetylene equipment safely. Lock
the equipment in an upright position in the truck and at
the job site.
3. Use dry nitrogen or carbon dioxide to pressurize the sys
tem for leak checking. Always use a good regulator. Be
careful not to exceed 150 psig test pressure in the her
metic compressor.
4. Wear safety goggles and gloves when recovering refrig
erant from a system,
5. Attend shop safety meetings.
PREVENTIVE MAINTENANCE
General
CLEANING — Clean cooling coil and condenser coil. Hold
flashlight behind coil to see If all spaces are clear. Use a
hooked wire to remove dirt. Dust accumulation obstructs or
reduces airflow and results in loss of capacity. Coils may
be vacuumed when dry. Outdoors, unit can be brushed with
a stiff brush and fins blown out with compressed air.
Thoroughly clean basepan, motors, fan wheels, other com
ponents, and all drain passages. Vacuum insulation. Clean
all Inside painted surfaces with mild detergent to remove
grease.
Clean cabinet and grille. Mild detergents reduce electro
static charges on plastic sections of the grille and are good
cleaners.
containing solvents to clean plastic sections.
PAINTING — Paint any parts that show evidence of rust
with a good rust-resistant paint.
WIRING — Check all wiring for deterioration and all elec
trical contacts for tightness and lack of corrosion.
MOUNTING — Make sure unit is secure in window, and
level from left to right and from front to rear according to
installation instructions provided.
tered in orifice, and tight on shaft.
LEAKS — Check any connections that show evidence of
oil or leaks. When unit is properly installed, centered, and
leveled (see Owners’ Guide), check gaskets and wing pan
els for possible air leakage.
CONTROLS — Check unit to ensure all controls are func
tioning correctly and unit operation is normal.
no piping is vibrating against any side of unit.
System Cleaning/Flushing — For proper cleaning
and flushing, use the Carrier Totalclaim reclaim system, or
a comparable refrigerant recycling system.
Do not use carbon tetrachloride, solvents, or waxes
Check fans to ensure they are correctly positioned, cen
Vibrations can cause unwanted noise. Check to be sure
SP
Table 1 — Physical and Electrical Data (Single Phase, 60 Hz) — 1993
MODEL
73
XHA101D
XCA121D
XCA123D
XHA123D
XCA153D
XHA153D
XHA173D
XCA183D
YCA213D
YCA213P
YCA243D
YCA243P
MODEL
73
XHA101D
CASING
(See
Table 6)
305 9,100
305 12,000
305
305 12,000/11,600 9,200/ 7,600
305 15,000/14,700
305
305
305 17,800/17,500
405
405 21,000/20,800
405
405 23,500/23,000
CAPACITOR
(See Table 5)
CAPACITY (Btuh)*
Cooling
Heating
5,200
— 37 5
12,000/11,600
-
15,000/14,700
17,100/16,700
14,600/11,800 38
16,300/12,900 38
21,000/20,800
—
—
23,500/23,000
-
-
FAN MOTOR
Carrier
Part Number
RC-1 25901023 1 88
FLA
XCA121D RC-1 25901023 1.88
XCA123D
XHA123D RC-1
XCA153D
XHA153D
XHA173D
XCA183D
YCA213D RC-2
YCA213P
YCA243D
YCA243P
RC-1 25901026 0.98
25901026 0 98
RC-1 25901031 0 99
RC-1
RC-2 25901018
RC-2 25901018
RC-2
RC-3 25901024 1.54 T-1
RC-3
25901031
25901024 1.54 D-2 z-1
25901024 1.54
25901024 1 54 T-1 z-1
0 99 D-1
1.24 D-3 z-1 V4 CD-3
1.24 D-3 z-1
LEGEND
AHAM — Association of Home Appliance Manufacturers
ANSI — American National Standards Institute
DOE — Department of Energy
EER — Energy Efficiency Ratio
FLA — Full Load Amps
PF — Power Factor
R-22
WET
CHG
BULB
(oz.
± .05)
29 5
AtF
103
Volts
10.0 115
125 230/208
37 5
12.5 230/208
37.5
230/208
24 1
38
230/208 253-187 6 5/70 20.9/19 0 1470/1440 4790/3950 10 2/10.2 98/99
97
97 230/208
24.6 230/208
38
21.8 230/208
47
21.8 230/208
47
24.1 230/208
51
51 24.1 230/208
COMPRESSOR
(See Table 2)
H-1 Z-1
H-2
H-3 z-1 - CD-6 CI-1 2
H-3 z-1 V2
D-1 z-1
D-2
Voltage
Range
127-104
115
127-104
253-187
253-187 5 2/ 5.5
253-187
253-187
253-187 8.2/ 8 9
253-187
253-187
253-187
253-187
THERMISTOR
NAMEPLATE
Amps
Cool Heat
9.0
16 1 1020
105
5 2/55
13.4/12 3
6 5/ 7.0
-
-
-
Watts
Cool Heat
1200
1180/1140
1840
-
-
EER
(DOE)PF(%)
9.0 98
10.0 99
10 2/10.2 98/99
1180/1140 3080/2540 10.2/10 2 98/99
1470/1440
-
10 2/10.2 97/99
7 9/ 8.5 22 7/20.8 1800/1750 5220/4320 9 5/ 9.5 99/98
- 1870/1840 - 9.5/ 9 5 99/99
10 4/11.3 - 2290/2260 - 9 2/ 9.2
10.4/11.3
- 2290/2260 -
12.0/12.7 - 2670/2610 - 8 8/ 8.8
12 0/12.7
HEATER
(See Table 4)
Z-1 - CD-6 CI-1 2
z-1
z-1
z-1
ASSEMBLY
(See Table 3)
-
VI
V3
-
-
-
-
-
-
2670/2610
-
CAPILLARY
(See Tables 7 and 8)
Data Insertion
CD-4 CI-1 1
CD-6 CI-1
CD-I
CD-I
CD-3
CD-2 CI-1 3
CD-2
CD-5
CD-5
CI-1
CI-1 3
CI-1
CI-1
CI-1
CI-1 3
CI-1
9 2/92
8 8/88
96/96
96/96
97/99
97/99
Number
of Tubes
2
3
3
3
3
3
•Based on AHAM Standard RAC-1 and ANSI Z234 1
At — Entering wet-bulb temperature minus leaving wet-bulb temperature
based on 67 F room wet-bulb temperature and 95 F dry-bulb outside-air
temperature If conditions vary, wet-bulb At will vary
KEY NUMBER
(See Table 1)
D-1
D-2 P033-2221 23.0 230/208 50 0 9.1
D-3 P033-1821
H-1 P031-1004
H-2 P031-1103
H-3
T-1 P035-2522
LEGEND
LRA — Locked Rotor Amps
FLA — Full Load Amps
Table 2 — Compressors
REPLACEMENT
PART NUMBER
P033-1521 13.0
P031-1122
OIL RECHARGE
(oz.)
VOLTS
(1 Ph, 60 Hz)
LRA FLA
230/208 33 2
13.0
9.1
9 1
9.1
230/208 38 0 74
115 48 3
115 54 0 160
230/208 26.3
183 230/208 63.0 107
59
8.6
4.8
Table 3 — Heater Assemblies
Table 6 — Casing Dimensions (in)
HEATER
ASSEMBLY
(See Table 1)
VI
V2
V3
V4
LS — Limit Switch
KEY NUMBER
(See Table 1)
Z-1
KEY NUMBER
(See Table 1)
RC-1
RC-2
RC-3
PRIMARY
KILOWATTS
1.6 140 200
2.8
4.5 140 200
5.0
LS
(F)
140 200
140 210
SECONDARY
Table 4 — Thermistor
CARRIER VENDOR
NUMBER NUMBER (Ohms)
42320001
CM305C20C
RESISTANCE
Table 5 — Capacitor
CARRIER
NUMBER
05706028
05706030 30/5
05706031 45/5
MFD
25/5
LS
(F)
25
VOLTS
370
370
370
KEY NUMBER
(See Table 1)
305 16% 25% 6 23%4
405 17% 6 26 27% 6
HEIGHT WIDTH DEPTH
Table 7 — Capillary Data
(See Table 1)
CD-I
CD-2
CD-3
CD-4 1 Tube - 28 7
CD-5
CD-6
Length (± .002) ID (± .002)
1 Tube — 47.0 1 Tube - .054
2 Tubes — 64 0 2 Tubes — 054
2 Tubes — 29.3
1 Tube - 56 3
1 Tube — 47.0
2 Tubes — 29.3 2 Tubes — 054
1 Tube - 39.5
2 Tubes — 29.3
2 Tubes — 40 5
2 Tubes — .054
2 Tubes — .054
Table 8 — Capillary Insertion
DEPTH (In.)
(See Table 1)
CI-1 1 1
Condenser Coll
Connection Tube
Evaporator Coil
Connection Tube
2 Tubes — 054
1 Tube - .064
1 Tube - .054
1 Tube — .064
1 Tube — .054
DEPTH (in.)
Table 9 — Receptacles, Fuse Types, Wire Sizes
UNIT NAMEPLATE VOLTAGE 115
MAXIMUM NAMEPLATE AMPS
OUTLET RATED VOLTS/AMPS
RECEPTACLE CONFIGURATION
12
125/15
©
MFR PART NO.
Hubbell
P & S
GE
Arrow-Hart
TIME-DELAY FUSE OR CIRCUIT
BREAKER SIZE (AMPS)
FUSE TYPE
RECOMMENDED AWG
WIRE SIZEt
AWG — American Wire Gage
‘May be used for 15-amp applications if fused for 15-amp.
tBased on copper wire at 60 C temperature rating.
5261
6201
GE5261-1
5261
15
14 12
PI
ug
16
125/20
©
5361
5361
GE4102-1
5361
20*
12
250/15
©
5661
5661
GE4069-1
5661
15
14
230/208
16
250/20
©
5461
5871
GE4182-1
5861
20*
Cartridge
12
24
250/30
©
9330
5930
GE4139-3
5700
30
10
DISASSEMBLY INFORMATION
A WARNING
Before working on any air conditioner, be sure to first
disconnect all electric power to unit to avoid the pos
sibility of electrical shock and personal injury.
Models 73X,Y Room Air Conditioners have the follow
ing characteristics;
_________
UNIT
73XC Cooling Only
73XH
73YC Cooling Only
FUNCTION
Heat/Cool
CASING
305
305
405
All units have a slide-out chassis. Units can be serviced
without removing casing.
Filter Removal
Place index fingers inside the openings on either side of
1.
the filter frame. See Fig. 1.
Apply pressure inward toward the center, while pulling
filter down and out.
Vacuum filter, or wash in lukewarm water. Shake off
3.
excess water and dry thoroughly.
Replace filter by sliding filter upward behind front grille
4.
until filter snaps in place.
SCREW (HIDDEN) SCREW (SECURITY)
Fig. 2 - Removing 2 Screws from Front Grille
Fig. 3 - Removing Front Grille
Control Box Removal
1. Slide chassis part way out of casing to access control
box.
A CAUTION
Use care when sliding chassis out of unit so that it
does not fall from casing. Personal injury and/or
damage to unit and surroundings can result.
Fig. 1 — Removing Filter
Front Grille Removal
1. Remove 2 screws located on either side of front grille.
See Fig. 2.
NOTE; Facing the front of unit, grille screw on the righthand side serves as a unit security screw.
2. Pull grille out and upward, removing it from chassis.
See Fig. 3.
3. To replace grille, place grille top on unit top edge and
firmly press grille back into position.
4. Replace screws.
NOTE; Sliding chassis partly out of casing ensures that
the wiring does not become pinched when the control
box is replaced. See Fig. 4.
2.
Remove front grille. Refer to Front Grille Removal on
this page.
Carefully remove thermostat and mode switch control
3.
knobs by pulling them straight out and off. See Fig. 5.
Grasp escutcheon located in lower right-hand corner of
unit and apply pressure on both sides towards the cen
ter. See Fig. 6. Carefully disengage ¿scutcheon plastic
tabs from sheet metal slots and remdve.
5.
Remove 2 screws securing control box to chassis. See
Fig. 7.
6.
Disengage plastic clip, then ybmove sensing bulb with
attached bulb heater from coil face. See Fig. 7.
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