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Cancels: New II 538J-18-1
1/15/02
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
I. Complete Pre-Installation Checks . . . . . . . . . . . . . . 1
II. Rig and Mount Unit . . . . . . . . . . . . . . . . . . . . . . . . . . 3
III. Complete Refrigerant Piping Connections . . . . . . . 3
IV. Make Electrical Connections
. . . . . . . . . . . . . . . . 4
V. Accessory Installation. . . . . . . . . . . . . . . . . . . . . . . . 4
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
I. Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
II. Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
III. Cleaning Coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
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.
Untrained personnel may perform basic maintenance such
as cleaning and replacing filters. All other operations should
be performed by trained service personnel. When working on
air-conditioning equipment, observe safety precautions 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 a fire extin-
guisher available. Read these instructions thoroughly. Con-
sult local building codes and National Electrical Code (NEC,
U.S.A. Standard) for special installation requirements.
INSTALLATION
I. COMPLETE PRE-INSTALLATION CHECKS
A. Unpack Unit
Move unit to final location. Remove unit packaging being
careful not to damage service valves or grilles.
B. Inspect Shipment
File claim with shipping company if shipment is damaged or
incomplete. Check unit nameplate to ensure unit matches
job requirements.
C. Consider System Requirements
Consult local building codes and NEC for special installation
requirements.
Allow sufficient space for airflow clearance, wiring, refriger-
ant piping, and servicing unit. See Fig. 1 and 2. Unit can be
mounted on a level pad directly on base legs or mounted on
raised pads at support points. See Fig. 2 for center of gravity.
WARNING: Before installing or servicing system,
always turn off main power to system. There may be
more than one disconnect switch. Turn off accessory
heater power if applicable. Electrical shock can cause
personal injury.
installation, start-up and
service instructions
LIGHT COMMERCIAL
CONDENSING UNITS
538J
Sizes 018-060
C
O
O
LIN
G
Fig. 1 — Typical Condensing Unit