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Installation, Start-Up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS ...................1
INSTALLATION ..............................1-7
Step 1 — Complete Pre-Installation
Checks ....................................1
• UNPACK UNIT
• INSPECT SHIPMENT
• CONSIDER SYSTEM REQUIREMENTS
Step 2 — Rig and Mount Unit .................3
• MOUNTING ON GROUND
• MOUNTING ON ROOF
• RIGGING
Step 3 — Complete Refrigerant Piping
Connections ...............................3
• CHECK ACCURATER CONTROL
• MAKE PIPING SWEAT CONNECTIONS
• PROVIDE SAFETY RELIEF
Step 4 — Make Electrical Connections ........4
• POWER WIRING
• CONTROL CIRCUIT WIRING
• CONNECTIONS TO DUCT-FREE
FAN COIL UNITS
Step 5 — Accessory Installation ..............4
START-UP ...................................7
SERVICE ...................................7-9
MAINTENANCE .............................10
TROUBLESHOOTING ........................11
SAFETY CONSIDERATIONS
Install and servicing air-conditioning equipment can be haz-
ardous due to system pressure and electrical components. Only
trained and qualified service personnel should install or serv-
ice 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 extinguisher available. Read these instructions thor-
oughly. Consult 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 dis-
connect switch. Turn off accessory heater power if
applicable. Electrical shock can cause personal injury.
Step 1 — Complete Pre-Installation Checks
UNPACK UNIT — Move unit to final location. Remove car-
ton from unit, being careful not to damage service valves or
grilles.
INSPECT SHIPMENT — File claim with shipping com-
pany if shipment is damaged or incomplete. Check unit name-
plate to ensure unit matches job requirements.
CONSIDER SYSTEM REQUIREMENTS — Consult
local building codes and NEC for special installation
requirements.
Allow sufficient space for airflow clearance, wiring,
refrigerant 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 cen-
ter of gravity.
COOLING
Fig. 1 — 38HDL Condensing Unit
38HDL018-060
Light Commercial Condensing Units
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. 563-899 Printed in U.S.A. Form 38HDL-1SI Pg 1 9-98 Replaces: New