Carrier 38AK012 - Manual

Installation, Start-Up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Step 1 — Complete Pre-Installation Checks . . . 1
• UNCRATE UNIT
• INSPECT SHIPMENT
• CONSIDER SYSTEM REQUIREMENTS
Step 2 — Rig and Mount the Unit . . . . . . . . . . . . . 4
• RIGGING
• COMPRESSOR MOUNTING
Step 3 — Complete Refrigerant Piping
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
• SIZE REFRIGERANT LINES
• FILTER DRIER AND MOISTURE INDICATOR
Step 4 — Make Electrical Connections . . . . . . . . 6
• FIELD POWER SUPPLY
• FIELD CONTROL WIRING
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9,10
Preliminary Checks . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Evacuate and Dehydrate . . . . . . . . . . . . . . . . . . . . . . 9
Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Compressor Overload . . . . . . . . . . . . . . . . . . . . . . . . 9
Cycle-LOC™ Device . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Low-Pressure/Loss-of-Charge Switch (LPS) . . . 9
High-Pressure Switch (HPS) . . . . . . . . . . . . . . . . . 10
Time Guard
ா
II Device . . . . . . . . . . . . . . . . . . . . . . . 10
Refrigerant Service Ports . . . . . . . . . . . . . . . . . . . 10
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . 10
Oil Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11,12
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Condenser-Fan Adjustment . . . . . . . . . . . . . . . . . . 11
Capacity Control — Unit 38AKS012 Only . . . . . 12
Compressor Removal . . . . . . . . . . . . . . . . . . . . . . . 12
Crankcase Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . 13,14
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 (NEC)
(U.S.A. Standard) for special installation requirements.
Before installing or servicing system, always turn off
main power to system. There may be more than one
disconnect switch. Electrical shock can cause personal
injury.
INSTALLATION
The 38AK007, 008, and 012 units use hermetic compres-
sors. The 38AKS008, 009, and 012 units use semi-hermetic
compressors. See Table 1A or 1B for physical data.
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 — Model 38AK (Size 007 Shown)
38AK007,008,012
38AKS008,009,012
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. 533-876 Printed in U.S.A. Form 38A-7SI Pg 1 5-99 Replaces: 38A-6SI