Carrier 38AKS013-024 User's Manual
Installation, Start-Up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Step 1 — Complete Pre-Installation
Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Step 2 — Rig and Mount the Unit . . . . . . . . . . . . . 8
Step 3 — Complete Refrigerant Piping
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Step 4 — Install Accessories . . . . . . . . . . . . . . . . 10
Step 5 — Complete Electrical
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Leak Test and Dehydration . . . . . . . . . . . . . . . . . . 12
Turn On Crankcase Heater . . . . . . . . . . . . . . . . . . . 12
Preliminary Charge . . . . . . . . . . . . . . . . . . . . . . . . . . 12
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-16
Preliminary Checks . . . . . . . . . . . . . . . . . . . . . . . . . 13
Preliminary Oil Charge . . . . . . . . . . . . . . . . . . . . . . 13
Start Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Adjust Refrigerant Charge . . . . . . . . . . . . . . . . . . . 13
Check Compressor Oil Level . . . . . . . . . . . . . . . . 13
Final Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
OPERATING SEQUENCE . . . . . . . . . . . . . . . . . . . . 17
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Fan Cycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Winter Start Control . . . . . . . . . . . . . . . . . . . . . . . . . 17
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-19
Capacity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Head Pressure Control . . . . . . . . . . . . . . . . . . . . . . 17
Time Guard
T II Circuit . . . . . . . . . . . . . . . . . . . . . . . 17
Winter Start Control . . . . . . . . . . . . . . . . . . . . . . . . . 18
Crankcase Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Compressor Protection . . . . . . . . . . . . . . . . . . . . . . 18
High-Pressure Switches . . . . . . . . . . . . . . . . . . . . . 18
Low-Pressure Switches . . . . . . . . . . . . . . . . . . . . . 18
Outdoor Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Cleaning Coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . 20,21
START-UP CHECKLIST . . . . . . . . . . . . . . . . CL-1,CL-2
SAFETY CONSIDERATIONS
Installing, starting up, and servicing air-conditioning equip-
ment can be hazardous due to system pressures, electrical
components, and equipment location (roofs, elevated struc-
tures, etc.).
Only trained, qualified installers and service mechanics
should install, start-up, and service this equipment (Fig. 1).
Untrained personnel can perform basic maintenance func-
tions such as cleaning coils. All other operations should be
performed by trained service personnel.
When working on the equipment, observe precautions in
the literature and on tags, stickers, and labels attached to the
equipment.
Follow all safety codes. Wear safety glasses and work gloves.
Keep quenching cloth and fire extinguisher nearby when braz-
ing. Use care in handling, rigging, and setting bulky equip-
ment.
ELECTRIC SHOCK HAZARD
Separate power sources (main and control
power circuits) are used for these units. Be
sure both main and control power circuits are
disconnected before servicing.
INSTALLATION
Step 1 — Complete Pre-Installation Checks
UNCRATE UNIT — Remove unit packaging except for the
top skid assembly, which should be left in place until after
the unit is rigged into its final location.
INSPECT SHIPMENT — File claim with shipping com-
pany if shipment is damaged or incomplete.
CONSIDER SYSTEM REQUIREMENTS
• Consult local building codes and National Electrical Code
(NEC, U.S.A.) for special installation requirements.
• Allow sufficient space for airflow clearance, wiring,
refrigerant piping, and servicing unit. See Fig. 1. See
Fig. 2 for unit component locations.
• Locate unit so that outdoor coil (condenser) airflow is un-
restricted on all sides and above.
• Unit may be mounted on a level pad directly on the base
channels or mounted on raised pads at support points. See
Tables
1A-1D
for
unit
operating
weights.
See
Table 2 for weight distribution based on recommended sup-
port points.
NOTE: If vibration isolators are required for a particular
installation, use the data in Table 2 to make the proper
selection.
38AKS013-024
Air-Cooled Condensing Units
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
3a 2a
PC 111
Catalog No. 563-701
Printed in U.S.A.
Form 38AKS-3SI
Pg 1
9-98
Replaces: 38AKS-2SI
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