Carrier 38BYC Instruction manual

38YCC(Q), 38AYC, 38BYC
Split-System Heat Pump
Visit www.carrier.com
Installation and Start-Up Instructions
NOTE: Read the entire instruction manual before starting the
installation.
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, personal injury, or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The qualified
installer or agency must use factory-authorized kits or accessories
when modifying this product. Refer to the individual instructions
packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Use quenching cloth for brazing operations.
Have fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions included in literature
and attached to the unit. Consult local building codes and National
Electrical Code (NEC) for special requirements.
Recognize safety information. This is the safety-alert symbol
.
When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, and CAUTION. These words are used with the safety-alert symbol. DANGER identifies the most serious hazards which will result in severe
personal injury or death. WARNING signifies hazards 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.
Before installing, modifying, or servicing system, main electrical disconnect switch must be in the OFF position. There
may be more than 1 disconnect switch. Lock out and tag
switch with a suitable warning label. Electrical shock can
cause personal injury or death.
INSTALLATION RECOMMENDATIONS
NOTE: In some cases noise in the living area has been traced to
gas pulsations from improper installation of equipment.
1. Locate unit away from windows.
2. Ensure that vapor and liquid tube diameters are appropriate to
capacity of unit.
3. Run refrigerant tubes as directly as possible by avoiding
unnecessary turns and bends.
4. Leave some slack between structure and unit to absorb
vibration.
5. When passing refrigerant tubes through the wall, seal opening
with RTV or other pliable silicon-based caulk. (See Fig. 2.)
6. Avoid direct tubing contact with water pipes, ductwork, floor
joists, wall studs, floors, and walls.
A97005
Fig. 1—Split-System Heat Pump
7. Do not suspend refrigerant tubing from joists and studs with a
rigid wire or strap which comes in direct contact with tubing.
(See Fig. 2.)
8. Ensure that tubing insulation is pliable and completely surrounds vapor tube.
9. When necessary, use hanger straps which are 1 in. wide and
conform to shape of tubing insulation. (See Fig. 2.)
10. Isolate hanger straps from insulation by using metal sleeves
bent to conform to shape of insulation.
When outdoor unit is connected to factory-approved indoor unit,
outdoor unit contains system refrigerant charge for operation with
indoor unit of the same size when connected by 15 ft of
field-supplied or factory accessory tubing. For proper unit operation, check refrigerant charge using charging information located
on control box cover.
INSTALLATION
Step 1—Check Equipment and Jobsite
INSPECT EQUIPMENT — File claim with shipping company
prior to installation if shipment is damaged or incomplete. Locate
unit rating plate on unit service panel. It contains information
needed to properly install unit. Check rating plate to be sure unit
matches job specifications.
Step 2—Install on a Solid, Level Mounting Pad
If conditions or local codes require the unit be attached to pad,
tiedown bolts should be used and fastened through knockouts
provided in unit base pan. Refer to Fig. 3 for pad dimensions and
dimensions needed to mount unit to pad.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
PC 101
Catalog No. 533-846
Printed in U.S.A.
Form 38AYC-1SI
Pg 1
2-97
Replaces: NEW
Tab 5a 5a
NOTE: Avoid contact between tubing and structure
OUTDOOR WALL
INDOOR WALL
CAULK
C
LIQUID TUBE
VAPOR TUBE
INSULATION
THROUGH THE WALL
3⁄8″D. (9.53) TIEDOWN
JOIST
HANGER STRAP
(AROUND VAPOR
TUBE ONLY)
KNOCKOUTS (2) PLACES
A
INSULATION
B
VAPOR TUBE
A94199
MIN. PAD
DIM. (IN.)
UNIT SIZE
38YCC(Q)018-030
38AYC018
38BYC018
38YCC(Q)036-060
38AYC024-060
38BYC024-060
1″ MIN.
LIQUID TUBE
SUSPENSION
A94028
Fig. 2—Connecting Tubing Installation
TIEDOWN KNOCKOUT
LOCATIONS
A
B
C
(In.)
(In.)
(In.)
22-1/2 X 22-1/2
3-11/16
18-1/8
14-3/8
30 X 30
6-1/2
23-1/2
20
Fig. 3—Mount Unit to Pad
Step 3—Clearance Requirements
Step 6—Metering Device
When installing, allow sufficient space for airflow clearance,
wiring, refrigerant piping, and service. Common clearances are 6
in. on 1 side, 12 in. on 2 sides, and 30 in. on service side of unit.
Allow 24 in. between units. Discharge air must be unobstructed
and must not recirculate.
NOTE: A thermostatic expansion valve (TXV) is required on all
38BYC units. Step 7 refers to installation of the TXV.
Remove indoor coil piston if unit is to be installed on system
with a TXV metering device.
Position so snow, ice, or water from roof or eaves cannot fall
directly on unit.
If unit is being installed with piston, check indoor coil piston to see
if it matches the required piston shown on outdoor unit rating plate.
If it does not match, replace indoor coil piston with piston shipped
with outdoor unit. The piston shipped with outdoor unit is correct
for any approved indoor coil combination.
On rooftop applications, locate unit at least 6 in. above roof
surface. Place unit above a load-bearing wall and isolate unit and
tubing set from structure.
Arrange supporting members to adequately support unit and
minimize transmission of vibration to building. Consult local
codes governing rooftop applications.
Step 7—Remove Indoor AccuRater® Piston and Install
TXV
Step 4—Operating Ambients
The minimum outdoor operating ambient in cooling mode is 55°F,
and the maximum outdoor operating ambient in cooling mode is
125°F. The maximum outdoor operating ambient in heating mode
is 66°F.
For proper unit operation and reliability, units must be
installed with a field-supplied hard shut-off TXV. Do not
install with evaporator coils having capillary tube metering
devices or piston.
Step 5—Elevate Unit
After removing existing AccuRater from indoor coil, install
field-supplied bi-flow hard shut-off TXV kit. (See Fig. 4 and 5.)
For TXV kit part number and charging instruction, refer to TXV
label on your unit. If indoor unit (fan coil) comes factory equipped
with a bi-flow hard shut off TXV, no TXV change is required.
Accumulation of water and ice in base pan may cause
equipment damage.
In areas where prolonged freezing temperatures are encountered,
elevate unit per local climate and code requirements to provide
clearance above estimated snowfall level and ensure adequate
drainage of unit.
Install TXV kit to indoor coil as follows:
1. Install suction tube adapter.
2. Install liquid flare-to-sweat adapter.
2
and condition. For tubing requirements beyond 50 ft, consult your
local distributor or the Long-Line Application Guideline. Refer to
Fig. 6 for refrigerant tube dimensions and connections.
COIL
AIR DISCHARGE
SENSING
BULB
EQUALIZER
TUBE
FIELD POWER
SUPPLY CONN
7⁄8″ DIA HOLE WITH
1 1⁄8″ DIA KNOCKOUT
AND 1 3⁄8″ DIA
KNOCKOUT
THERMOSTATIC
EXPANSION
VALVE
A88382
Fig. 4—Typical TXV Installation
10 O'CLOCK
2 O'CLOCK
SUCTION LINE CONN
FIELD CONTROL
SUPPLY CONN
7⁄8″ DIA HOLE
LIQUID LINE CONN
SENSING BULB
A97009
STRAP
UNIT SIZE
018, 024
030, 036
042, 048
060
SUCTION TUBE
4 O'CLOCK
8 O'CLOCK
7⁄8
IN. OD & SMALLER
LARGER THAN
7⁄8
LIQUID TUBE
Conn Dia
Tube Dia
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
VAPOR TUBE
Conn Dia
Tube Dia
5/8
5/8
3/4
3/4
7/8
7/8
7/8
1-1/8
NOTE: Tube diameters are for lengths up to 50 ft. For tubing lengths greater
than 50 ft, consult your local distributor.
IN. OD
Fig. 6—Refrigerant Tube Dimensions/Connections
A81032
Fig. 5—Positioning of Sensing Bulb
MECHANICAL CONNECTION (38YCQ MODEL)
3. Connect external equalizer tube to fitting on suction tube
adapter.
1. Remove plastic retainer holding outdoor piston and piston
retainer in liquid service valve. Connect and tighten liquid
service valve adapter to valve body prior to assembling
ferrule/lock nut. (See Fig. 7.)
4. Position sensing bulb on horizontal portion of suction tube
adapter. Secure using supplied hardware.
5. Insulate bulb after installation. (See Fig. 5.)
2. Cut tubing to correct length, deburr and size as necessary,
making sure tube ends are square. If a large burr is evident, ID
and OD must be deburred to allow tube to bottom in valve.
6. Leak check all connections.
Step 8—Make Tubing Connections
3. Remove lock nut and ferrule from plastic bag taped to service
panel. (See Fig. 8.) Remove lock nut and ferrule from liquid
service valve adapter. (See Fig. 7.)
Relieve pressure and recover all refrigerant before system
repair or final unit disposal to avoid personal injury or death.
Use all service ports and open all flow-control devices,
including solenoid valves.
If undersized, damaged, or elliptically shaped tubing is used
when making connection, leaks could result.
4. Slide lock nut and ferrule onto each tube. (See Fig. 9.)
To prevent compressor damage DO NOT bury more than 36
in. of refrigerant tubing. If ANY tubing is buried, provide 6
in. vertical rise at service valve.
5. Apply a few drops of refrigerant oil to ferrule and valve
threads and adapter threads to reduce assembly torque and
assist sealing.
6. Insert tube end into service valve or adapter until it bottoms.
To prevent damage to unit or service valves observe the
following:
• Use a brazing shield.
• Wrap service valves with wet cloth or use a heat sink
material.
7. Push ferrule into place and hand tighten nut until an increase
in torque is felt.
Connect outdoor unit to indoor sections using accessory tubing
package or field-supplied tubing of refrigerant grade, correct size,
NOTE: A backup wrench on the hex part of the suction valve
fitting is required while tightening.
8. Mark nut and tube and tighten 1-1/2 turns from the mark. (See
Fig. 10.) Keep tube bottomed in valve and adapter while
tightening nut.
3
3. When suction pressure reaches 5 psig, shut unit off. Do not
operate unit in a vacuum.
PISTON BODY
4. Close suction service valve and recover refrigerant in tubing.
5. Back-off locknut and ferrule onto tube.
6. Remove damaged part of tubing using tubing cutter. Repeat
installation procedure previously outlined using new ferrule.
7. Evacuate tubing set and indoor coil. Check for leaks.
8. Open service valves or recharge unit. Check refrigerant
charge.
PISTON
PISTON RETAINER
LOCK NUT
LIQUID SERVICE
VALVE ADAPTER
FERRULE
LOCK NUT
A94030
Fig. 7—Liquid Service Valve Mechanical Fitting
Assembly (38YCQ Model)
TUBING
VALVE FITTING
MARK ON LOCK NUT
AND TUBE
FERRULE
A92122
Fig. 10—Proper Marking of Valve Assembly
If refrigerant tubing or indoor coil is exposed to atmosphere, it
must be evacuated to a minimum of 500 microns to eliminate
contamination and moisture in the system.
SWEAT CONNECTION
1. Consult local code requirements.
LOCK NUT
A92120
2. Remove plastic retainer holding outdoor piston in the liquid
service valve and connect sweat/flare adapter provided to
valve. (See Fig. 11.)
Fig. 8—Suction Service Valve with Mechanical
Adapter (38YCQ Model)
3. Connect refrigerant tubing to fittings on outdoor uit vapor and
liquid service valves.
FERRULE
4. Service valves are closed from factory and ready for brazing.
LOCK NUT
5. After wrapping service valve with a wet cloth, tubing set can
be brazed to service valve using either silver bearing or
non-silver bearing brazing material.
6. Refrigerant tubing and indoor coil are now ready for leak
testing. This check should include all field and factory joints.
Step 9—Make Electrical Connections
TUBING
To avoid personal injury or death, do not supply power to unit
with compressor terminal box cover removed.
A92121
Fig. 9—Lock Nut/Ferrule Positioning
Be sure field wiring complies with local and national fire, safety,
and electrical codes, and voltage to system is within limits shown
on unit rating plate. Contact local power company for correction of
improper voltage. See unit rating plate for recommended circuit
protection device.
The tube end must stay bottomed in the service valve during
final assembly to ensure proper seating, sealing, and rigidity.
1. Attach gages to service valves.
NOTE: Operation of unit on improper line voltage constitutes
abuse and could affect unit reliability. See unit rating plate. Do not
install unit in system where voltage or phase imbalance (3 phase)
may fluctuate above or below permissible limits.
2. Close liquid service valve and operate unit in cooling mode to
pump refrigerant charge into condenser coil.
NOTE: Use copper wire only between disconnect switch and
unit.
MECHANICAL FITTING REPAIR
To replace damaged ferrule or tubing, proceed as follows.
4
Use furnace transformer, fan coil transformer, or accessory transformer for control power, 24-v/40-va minimum.
PISTON BODY
NOTE: Use of available 24-v accessories may exceed the minimum 40-va power requirement. Determine total transformer loading and increase the transformer capacity or split the load with an
accessory transformer as required.
NOTE: The defrost timer is factory set for 90-minute cycles. The
timer can be field set for 30- and 50-minute cycles depending on
defrost conditions in your geographical location.
PISTON
Step 10—Compressor Crankcase Heater
PISTON RETAINER
When equipped with a crankcase heater, energize heater a minimum of 24 hr before starting unit. To energize heater only, set
thermostat to OFF and close electrical disconnect to outdoor unit.
SWEAT/FLARE ADAPTER
A crankcase heater is required if refrigerant tubing is longer than
50 ft.
A94029
NOTE: The Seasonal Energy Efficiency Ratio (SEER) and Heating Seasonal Performance Factor (HSPF) is obtained with the
crankcase heater de-energized. To de-energize the crankcase
heater, disconnect black crankcase heater wires at contactor. After
disconnecting, make sure wires are isolated from all other electrical connections and components to prevent electrical shorting.
Fig. 11—Liquid Service Valve
NOTE: Install branch circuit disconnect per NEC of adequate
size to handle unit starting current. Locate disconnect within sight
from and readily accessible from unit, per Section 440-14 of NEC.
Step 11—Install Electrical Accessories
ROUTE GROUND AND POWER WIRES — Remove access
panel to gain access to unit wiring. Extend wires from disconnect
through power wiring hole provided and into unit control box.
Refer to the individual instructions packaged with kits or accessories when installing.
Step 12—Start-Up and Check Charge
The unit cabinet must have an uninterrupted or unbroken
ground to minimize personal injury if an electrical fault
should occur. The ground may consist of electrical wire or
metal conduit when installed in accordance with existing
electrical codes. Failure to follow this warning can result in an
electric shock, fire, or death.
To prevent compressor damage or personal injury, observe
the following:
• Do not overcharge system with refrigerant.
• Do not operate unit in a vacuum or at negative pressure.
• Do not disable low-pressure switch
In scroll compressor applications:
• Dome temperatures may be hot.
• In 3 phase application, incorrect phasing will cause reverse
rotation, resulting in elevated noise levels, equalized pressures, and reduced current draw. Correct by reversing power
connection L1 and L2 on contactor.
CONNECT GROUND AND POWER WIRES — Connect ground
wire to ground connection in control box for safety. Connect
power wiring to contactor as shown in Fig. 12.
DISCONNECT
PER N.E.C. AND/OR
LOCAL CODES
CONTACTOR
To prevent personal injury wear safety glasses, protective
clothing, and gloves when handling refrigerant and observe
the following:
• Back seating service valves are not equipped with Schrader
valves. Fully back seat (counter clockwise) valve stem before
removing gage port cap.
• Front seating service valves are equipped with Schrader
valves.
FIELD POWER
WIRING
3 PHASE ONLY
BLUE
FIELD GROUND
WIRING
GROUND
LUG
A94025
Do not vent refrigerant to atmosphere. Recover during system
repair or final unit disposal.
Fig. 12—Line Power Connections
Follow these steps to properly charge a system.
CONNECT CONTROL WIRING — Route 24-v control wires
through control wiring grommet and connect leads to control
wiring. (See Fig. 13)
1. Fully back seat (open) liquid and vapor tube service valves.
2. Unit is shipped with valve stem(s) front seated (closed) and
caps installed. Replace stem caps after system is opened to
refrigerant flow. Replace caps finger-tight and tighten with
wrench an additional 1/6 turn for front seating valves (female
hex stem) or 1/12 turn for back seating valves (male square
stem).
Use No. 18 AWG color-coded, insulated (35°C minimum) wire. If
thermostat is located more than 100 ft from unit (as measured
along the control voltage wires), use No. 16 AWG color-coded
wire to avoid excessive voltage drop.
5
3. Close electrical disconnects to energize system.
Should temperature continue to fall, R-W2 is made through
second-stage room thermostat bulb. Circuit R-W2 energizes a
sequencer, bringing on first bank of supplemental electric heat and
providing electrical potential to second heater sequencer (if used).
If outdoor temperature falls below setting of outdoor thermostat
(field-installed option), contacts close to complete circuit and bring
on second bank of supplemental electric heat.
4. Set room thermostat at desired temperature.
5. Set room thermostat to HEAT or COOL and fan to ON or
AUTO mode, as desired. Operate unit for 15 minutes. Check
system refrigerant charge.
6. Factory charge is shown on outdoor unit rating plate. Adjust
charge in cooling mode by following procedure shown on the
charging table. Check charge in heating mode by following
procedure shown on heating check chart. Both are located on
outdoor unit.
When thermostat is satisfied, its contacts open, de-energizing the
contactor and sequencer. All heaters and motors should stop.
Defrost
SEQUENCE OF OPERATION
NOTE: Defrost control board may be equipped with 5-minute
lockout timer which may be initiated upon any interruption of
power.
The defrost control is a time/temperature control which includes a
field-selectable (quick-connects located at board edge) time period
between defrost cycles (30, 50, and 90 minutes), factory set at 90
minutes.
With power supplied to indoor and outdoor units, transformer is
energized.
The electronic timer and defrost cycle start only when contactor is
energized and defrost thermostat is closed.
Cooling
The defrost mode is identical to cooling mode except that outdoor
fan motor stops and second-stage heat is turned on to continue
warming conditioned space.
On a call for cooling, thermostat makes circuits R-O, R-Y, and
R-G. Circuit R-O energizes reversing valve, switching it to cooling
position. Circuit R-Y energizes contactor, starting outdoor fan
motor and compressor circuit. R-G energizes indoor unit blower
relay, starting the indoor blower motor on high speed.
CARE AND MAINTENANCE
For continuing high performance and to minimize possible equipment failure, it is essential that periodic maintenance must be
performed on this equipment.
When the thermostat is satisfied, its contacts open, de-energizing
the contactor and blower relay. Compressor and motors should
stop.
Leave User’s Manual with homeowner. Explain system operation
and periodic maintenance requirements outlined in manual. Frequency of maintenance may vary depending upon geographic
areas, such as coastal applications which require more frequent
maintenance.
NOTE: If indoor unit is equipped with a time-delay relay circuit,
the blower will run an additional 90 sec to increase system
efficiency.
Heating
On a call for heating, thermostat makes circuits R-Y and R-G.
Circuit R-Y energizes contactor, starting outdoor fan motor and
compressor. Circuit R-G energizes indoor blower relay, starting
blower motor on high speed.
6
CORPORATE
NON-PROGRAMMABLE
THERMOSTAT
MODEL HP
FA, FB, FC,
FD, FF
FAN COIL
CORPORATE
PROGRAMMABLE
THERMOSTAT
MODEL HP
HEAT
PUMP
24 VAC HOT
R
R
R
24 VAC COM
C
C
C
W2
W2
24 VAC HOT
R
R
INDOOR FAN
G
G
HEAT STAGE 2
HEAT STAGE 2
COOL/HEAT
STAGE 1
INDOOR FAN
W/W1
Y/Y2
G
COOL/HEAT
STAGE 1
Y
RVS COOLING
G
NOT USED
RVS COOLING
O/W2
NOT USED
Y1
NOT USED
B
TROUBLE
L
OPTIONAL
OUTDOOR
SENSOR
CONNECTION
FA, FB, FC,
FD, FF
FAN COIL
W/W1
W2
HEAT
PUMP
R
W2
Y/Y2
Y
O/W2
O
Y1/W2
O
24 VAC COM
C
NOT USED
B
TROUBLE
L
OPTIONAL
OUTDOOR
SENSOR
CONNECTION
S1
S2
C
C
S1
S2
A94390
Fig. 13—Typical 24-v Circuit Connections
7
A94391
CORPORATE
NON-PROGRAMMABLE
THERMOSTAT
MODEL HP
24 VAC HOT
24 VAC COM
HEAT STAGE 2
COOL/HEAT
STAGE 1
INDOOR FAN
R
C
W/W1
FK4B
FAN COIL
R
C
W2
Y/Y2
Y/Y2
G
G
HEAT
PUMP
CORPORATE
PROGRAMMABLE
THERMOSTAT
MODEL HP
R
O/W2
O
NOT USED
Y1
Y1
NOT USED
B
E
TROUBLE
L
L
OPTIONAL
OUTDOOR
SENSOR
CONNECTION
HEAT
PUMP
C
W2
Y
W3
RVS COOLING
FK4B
FAN COIL
O
24 VAC HOT
R
R
INDOOR FAN
G
G
HEAT STAGE 2
W/W1
W2
W2
COOL/HEAT
STAGE 1
Y/Y2
Y/Y2
Y
RVS COOLING
O/W2
O
O
NOT USED
Y1/W2
W3
24 VAC COM
C
C
NOT USED
B
E
TROUBLE
L
L
OPTIONAL
OUTDOOR
SENSOR
CONNECTION
S1
R
C
S1
S2
S2
A94392
A94393
Fig. 13—Typical 24-v Circuit Connections (Continued)
8
NON-CORPORATE
NON-PROGRAMMABLE
THERMOSTAT
MODEL HP
FK4B
FAN COIL
HEAT
PUMP
24 VAC HOT
R
R
R
24 VAC COM
C
C
C
HEAT STAGE 2
COOL/HEAT
STAGE 1
INDOOR FAN
W
W2
W2
Y
Y/Y2
Y
G
G
NON-CORPORATE
NON-PROGRAMMABLE
THERMOSTAT
MODEL HP
W3
RVS COOLING
O
O
O
FA, FB, FC,
FD, FF
FAN COIL
HEAT
PUMP
24 VAC HOT
R
R
R
24 VAC COM
C
C
C
HEAT STAGE 2
W
W2
W2
COOL/HEAT
STAGE 1
Y
INDOOR FAN
G
RVS COOLING
O
EMERGENCY
HEAT
E
Y
G
O
Y1
EMERGENCY
HEAT
E
E
L
A95280
A95279
NOTES:
1. CORPORATE THERMOSTAT WIRING DIAGRAMS ARE ONLY ACCURATE FOR MODEL
NUMBERS BEGINNING WITH TSTAT _ _ _ _ _ _ _
2. WIRING MUST CONFORM TO NEC OR LOCAL CODE.
3. SOME UNITS ARE EQUIPPED WITH PRESSURE SWITCH(ES), TEMPERATURE SWITCH,
OR 5 MINUTE COMPRESSOR CYCLE PROTECTION. CONNECT 24 VOLT FIELD WIRING
TO FACTORY PROVIDED STRIPPED LEADS.
4. A LIQUID LINE SOLENOID VALVE IS REQUIRED ON SOME UNITS. SEE SPECIFIC UNIT
INSTRUCTIONS.
5. THERMOSTATS ARE FACTORY CONFIGURED WITH 5 MINUTE COMPRESSOR CYCLE
PROTECTION AND 4 CYCLES PER HOUR LIMIT. SEE THERMOSTAT INSTRUCTIONS
FOR DETAILS.
6. TO STAGE THE ELECTRIC RESISTANCE HEAT, CONSULT OUTDOOR THERMOSTAT
INSTALLATION INSTRUCTIONS.
LEGEND
24 VOLT FACTORY WIRING
24 VOLT FIELD WIRING
FIELD SPLICE CONNECTION
C
CONTACTOR
A94394
Fig. 13—Typical 24-v Circuit Connections (Continued)
9
10
11
Copyright 1997 CARRIER Corp. • 7310 W. Morris St. • Indianapolis, IN 46231
38ayc1si
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
PC 101
Catalog No. 533-846
Printed in U.S.A.
Form 38AYC-1SI
Pg 12
2-97
Replaces: NEW
Tab 5a 5a