Carrier 1995 User Manual
Electronic Control
1995 Room Air Conditioner
Start-Up and Service Instructions
CONTENTS
Page
SAFETY REMINDERS 1
START-UP 1
SERVICE 1-3
General Notes 1
Compressor Replacement 3
PREVENTIVE MAINTENANCE 3
General 3
System Cleaning/Flushing 3
DISASSEMBLY INFORMATION 3 11
Filter Removal 4
Front Grille Removal 4
Chassis Removal 4
Control Box Removal 5
Electronic Control Board Removal 6
Capacitor Removal 7
Air Sweep Motor Removal 7
Air-Handling System Removal 7
Evaporator and Condenser Coils Removal 8
Exhaust Door Removal 8
Indoor Blower Wheel Adjustment
or Removal 9
Propeller Fan Adjustment or Removal 10
Fan Motor Removal 10
Compressor Removal 11
Strainer Removal and Replacement 11
SERVICE POINTS 11
TROUBLESHOOTING 12
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
START-UP
Refer to opeiating instructions in Owner’s Guide pro
vided with room air conditioner
SERVICE
General Notes — These Start-Up and Seivice Instruc
tions aie provided to assist the trained and qualified service
technician in lepairing or replacing components of Carrier
electronically conti oiled (EC) Room Air Conditionei Dis
assembly photos are included for the unit 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 propeily trained and qualified Carrier seivice 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
Before disconnecting, discharge capacitors by shorting
capacitors 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, accuiate
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, Chap
ters 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 recovering the refrigerant, not
allowing it to escape to the atmosphere
Book|1 14 PC 131 Catalog No 537-323 Printed in USA Form73XC-1SS Pg 1 1-95 Replaces: New
Tab 8a 10a
Manutecturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations
Table 1 — Physical and Electrical Data (Single-Phase, 60 Hz)
SERVICE/
DISCRETE NO
73XCB118301E
SERVICE
DISCRETE NO.
73XCB118301E RC-2
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
CASING
(See Table 5)
305
CAPACITOR
(See Table 4)
LEGEND
KEY NUMBER
(See Table 1)
D-5
LEGEND
FLA — Full Load Amps
LRA — Locked Rotor Amps
COOLING
CAPACITY
(Btuh)‘
18,000/
17,000
FAN MOTOR
Carrier
Part Number
25901051
REPLACEMENT
PART NUMBER
P033-1822
FLA
1 24
R-22
CHG
(OZ. ± 05)
37 0
COMPRESSOR
(See Table 2)
WET
BULB
At F
135
D-5 Z-1
230/208
COMPRESSOR-START
THERMISTOR
At — Entering wet-bulb temperature minus leaving wet-buib temper
*Based on AHAM Standard RAC-1 and ANSI Z234 1
Table 2 — Compressor
OIL RECHARGE
(OZ)
80
NAMEPLATE
FLA
128
EER
(DOE)PF(%)
96 99
Number
of Tubes
3
Volts
(See Table 3)
ature based on 67 F room wet-bulb temperature and 95 F drybulb outside-air temperature If conditions vary, wet-bulb At will
vary
(Slngle-Ph, 60 Hz)
Voltage
Range
253-187
VOLTS
230/208
Amps
8 3/8 8
CAPILLARY (See Tables 6 and 7)
Data
CD-3
LRA
44 0
Watts
1870/
1840
Insertion
CI-1
Table 3 -- Compressor-Start Thermistor
KEY NUMBER CARRIER
(See Table 1)
Z-1 42320001
NUMBER
VENDOR
NUMBER
CM305C20C
Table 4 — Capacitor
KEY NUMBER
(See Table 1)
RC-2
CARRIER
NUMBER
05706030
MFD
30/5
Table 5 - Casing Dimensions (in.)
KEY NUMBER
(See Table 1)
305 163/4
HEIGHT
WIDTH
253/16
Table 6 — Capillary Data
KEY NUMBER
(See Table 1)
CD-3
Length (± 002)
1 Tube — 47 0 1 Tube - 054
2 Tubes — 29 3
DIMENSIONS (in}
Table 7 — Capillary Insertion
KEY NUMBER
(See Table 1)
CM
DEPTH (In.)
Condenser Coil
Connection Tube
1 1
RESISTANCE
(Ohms)
25
VOLTS
370
DEPTH
233/4
ID(± 002)
2 Tubes — 054
DEPTH (in )
Evaporator Coil
Connection Tube
Table 8 — Receptacle, Fuse Type, Wire Size
UNIT NAMEPLATE VOLTAGE
MAXIMUM NAMEPLATE AMPS
OUTLET RATED VOLTS/AMPS
RECEPTACLE CONFIGURATION
MFR PART NO
Hubbell
P &S
GE
Arrow-Hart
TIME-DELAY FUSE OR CIRCUIT
»
BREAKER SIZE (AMPS)
FUSE TYPE
RECOMMENDED AWG
WIRE SIZE*
LEGEND
AWG — American Wire Gage
‘Based on copper wire at 60 C temperature rating
Table 9 - Electronic Control
ITEM
COOLING-ONLY
CONTROL
CARRIER PART INDOOR
NO THERMISTOR
CEPL130015-01
230/208
12
250/15
5661
5661
GE4069-1
5661
15
Cartridge
14
912-710011-P2216
□El
Compressor Replacement
A CAUTION
Stand clear of compressor terminals when working on
compressors With system under pressure, terminals may
blow causing personal injury
Observe the same safety procedures for rotary compres
sors as for reciprocating 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
4 Recover the refrigerant charge from the unit After re
covering, cut the discharge and suction line process tubes
below Sie 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 compiessor fittings more easily before the compiessor is
put back into the unit
A CAUTION
Oil vapor in piping stubs can ignite from torch flame
and cause serious injury Exeicise extreme care when
brazing, and keep brazing cloth and fire extin
guisher handy for emergency use
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 compiessed aii
Thoioughly clean basepan, motois, 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 Do not use carbon tetrachloride, solvents, or waxes
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
Check fans to ensure they are correctly positioned, cen
tered in orifice, and tight on shaft
LEAKS — Check any connections that show evidence of
oil oi leaks When unit is propeily installed, centered, and
leveled (see Owners’ Guide), check gaskets and wing pan
els for possible ail leakage
CONTROLS — Check unit to ensure all contiols are func
tioning correctly and unit operation is normal
Vibrations can cause unwanted noise Check to be sure
no piping is vibrating against any side of unit
Connect a nitrogen supply to the unit at one of the tap-
a-line connectors (5 psig maximum flow), leaving the
other connector open to the atmosphere Braze angle
valves with stubs to each process tube
Remove compressor from unit Refer to Compressor
Removal, page 11
Remove tap-a-lines from suction and discharge lines
Carefully braze the holes closed from where the tap-alines were removed
Clean system add or replace liquid line filter drier
For proper cleaning and flushing, use the Carriei
Totalclaim® recovery system or a comparable refriger
ant recycling system
Install new compressor and braze into place with fieldsupplied copper slip couplings
Connect wiring replace wire terminals if necessary
10
Proceed with evacuation and charging Pinch off lines
U
where angle valves were added Cut off angle valves
above pinch-off, and braze tubes
12
Start up unit
System Cleaning/Flushing — For proper cleaning
and flushing, use the Carrier Totalclaim recovery system,
or a comparable refrigerant recycling system
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
The Electronic Control Room Air Conditioner is cooling
only and has casing key no 305
All units have a slide-out chassis Units can be serviced
without removing casing
Filter Removal
1 Place index fingers inside the openings on either side of
the filter frame See Fig 1
2 Apply pressure inward toward the center, while pulling
filter down and out
3 Vacuum filter, or wash in lukewarm water Shake off
excess water and dry thoroughly
4 Replace filter by sliding filter upward behind front grille
until filter snaps in place
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 right-
hand 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
■■
Fig. 3 — Removing Front Grille
Chassis Removal
A CAUTIOH
Coil fins are sharp Use care when removing chassis
from casing to avoid personal injury Do not use plas
tic parts for lifting or pulling, they are not structural
members of the chassis Lift using basepan only Chas
sis is heavy Obtain assistance for lifting
Chassis can be serviced without removing unit casing from
window or wall location
1 Remove front grille See Front Grille Removal instruc
tions, this page
2 If unit has not been installed, remove shipping screw
See Fig 4
3 Slide chassis out from casing See Fig 5
4 Reverse above procedure to reinstall chassis in casing
Be sure to replace and tighten left-hand screw and right-
hand security sciew on the front grille
Fig. 1 — Removing Filter
SCREW (HIDDEN) SCREW (SECURITY)
Fig. 2 — Removing 2 Screws from Front Grille
Fig. 4 - Removing Shipping Screw
Fig. 5 - Sliding Chassis Out from Casing
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