Manufacturer reserves the right to discontinue, or change at any time, specificat ions or designs without notice and without incurrin g obligations.
PC 111 Catalog No. 533-80003 Printed in U.S.A. Form 38A-9SI Pg 1 5-01 Replaces: 38A-8SI
Book 1 4
Tab 3 a 2a
Installation, Start-Up andService 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-11
Preliminary Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Compressor Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Evacuate and Dehydrate . . . . . . . . . . . . . . . . . . . . . . . . . 9
Refrigerant Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Compressor Overload. . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Cycle-LOC™ Device (CLO) . . . . . . . . . . . . . . . . . . . . . . 10
Low-Pressure/Loss-of-Charge Switch (LPS). . . . . 10
High-Pressure Switch (HPS). . . . . . . . . . . . . . . . . . . . . 10
High Flow Valves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Refrigerant Service Ports . . . . . . . . . . . . . . . . . . . . . . . 10
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Sequence of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . 10
Oil Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11,12
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Condenser-Fan Adjustment . . . . . . . . . . . . . . . . . . . . . 11
Capacity Control — Unit 38AKS012 Only. . . . . . . . 12
Compressor Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Crankcase Heater (Except 38AK007) . . . . . . . . . . . . 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 components.
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.
NOTE: Ensure voltage listed on unit data plate agrees with
electrical supply to unit.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for brazing operations. Have fire
extinguisher available. Read these instructions thoroughly.
Consult local building codes and National Electrical Code
(NEC) (U.S.A. Standard) for special installation requirements.
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 SHIPMEN T — File claim with shipping company
if shipment is damaged or incomplete.
Before installing or servicing system, always turn off main
power to system and install lockout tag on disconnect.
There may be more than one disconnect switch. Electrical
shock can cause personal injury.

38AK007,008,012

38AKS008,009,012

Air-Cooled Condensing Units

50/60 Hz

Fig. 1 — Model 38AK (Size 007 Shown)