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Installation, Start-Up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS .................1
INSTALLATION ............................1-9
Step 1 — Complete Pre-Installation Checks ..1
• UNCRATE UNIT
• INSPECT SHIPMENT
• CONSIDER SYSTEM REQUIREMENTS
Step 2 — Rig and Mount the Unit ............2
• RIGGING
• MOUNTING
• COMPRESSOR MOUNTING
Step 3 — Complete Refrigerant Piping
Connections .............................2
• SIZE REFRIGERANT LINES
• FILTER DRIER AND MOISTURE INDICATOR
• LIQUID LINE SOLENOID VALVE
• SAFETY RELIEF
• SUCTION PIPING AT INDOOR COIL AND
TXV SENSING BULB LOCATION
Step 4 — Make Electrical Connections .......3
• FIELD POWER SUPPLY
• ACCESSORY ELECTRIC HEAT
• FIELD CONTROL WIRING
START-UP ...............................10,11
Preliminary Checks ........................10
Evacuate and Dehydrate ...................10
Refrigerant Charge ........................ 10
Refrigerant Service Ports ..................10
Sequence of Operation ....................10
Checking Cooling and Heating Control
Operation ...............................11
Malfunction ...............................11
SERVICE .................................11-13
Cleaning ..................................11
Lubrication ................................11
Outdoor-Fan Adjustment ...................11
Compressor Removal ......................11
Cooling Mode Operation ...................12
Heating Mode Operation ...................12
TROUBLESHOOTING CHART ..............14,15
START-UP CHECKLIST ................CL-1,CL-2
SAFETY CONSIDERATIONS
Installing and servicing air-conditioning equipment can be
hazardous due to system pressure and electrical compo-
nents. Only trained and qualified service personnel should
install or service air-conditioning equipment.
When working on air-conditioning equipment, observe pre-
cautions in literature and on tags and labels attached to unit.
Follow all safety codes. Wear safety glasses and work gloves.
Use quenching cloth for brazing operations. Have fire ex-
tinguisher available. Read these instructions thoroughly. Con-
sult local building codes and National Electrical Code U.S.A.
(NEC) for special installation requirements.
Before installing or servicing system, always turn off
main power to system. There may be more than one dis-
connect switch. Electrical shock can cause personal
injury.
INSTALLATION
The 38AQS008 unit uses a semi-hermetic compressor. See
Tables 1A and 1B for physical data.
The 38AQS008 is approved by Carrier for use only with
40RMQ008 fan cooling units. Use only approved far coils.
The 38AQS008 (60 Hz) is Underwriters’Laboratories (UL)
and Canadian Underwriters’ Laboratories (CUL) approved
for use with the 40RMQ008 fan coil only.
Step 1 — Complete Pre-Installation Checks
UNCRATE UNIT (See Fig. 1) — Remove unit packaging
except for the top skid assembly and wood bumpers, which
should be left in place until after unit is rigged into place.
INSPECT SHIPMENT — File claim with shipping com-
pany if shipment is damaged or incomplete.
Fig. 1 — 38AQS008 Unit
38AQS008
Air-Cooled Split System Heat Pump
50/60 Hz
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
Tab 5a 5a
PC 111 Catalog No. 533-887 Printed in U.S.A. Form 38AQS-4SI Pg 1 6-95 Replaces: 38AQS-3SI