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Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 02-38HD0001-SI Printed in U.S.A. Form 38HD-4SI Pg 1 1-06 Replaces: 38HDC-3SI
Book 1 4
Tab 3e 2f
Installation, Start-Up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS......................1
INSTALLATION ................................ 1-10
Step 1 — Complete Pre-Installation Checks ......1
• UNPACK UNIT
• INSPECT SHIPMENT
• CONSIDER SYSTEM REQUIREMENTS
• MATCHING THE CONDENSING UNIT TO AN
INDOOR UNIT
Step 2 — Rig and Mount Unit.....................3
• MOUNTING ON GROUND
• MOUNTING ON ROOF
• RIGGING
Step 3 — Complete Refrigerant Piping
Connections ...................................3
• CHECK ACCURATER CONTROL
• FILTER DRIER
• MAKE PIPING SWEAT CONNECTORS
• PROVIDE SAFETY RELIEF
Step 4 — Make Electrical Connections ...........6
• CONTROL CIRCUIT WIRING
• POWER WIRING
• CONNECTIONS TO DUCT-FREE FAN COIL UNITS
START-UP .......................................11
SERVICE ..................................... 11-14
MAINTENANCE .................................14
TROUBLESHOOTING..........................14,15
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.
Untrained personnel can 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 litera-
ture, tags, and labels attached 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 the National Electrical Code
(NEC) for special installation requirements.
INSTALLATION
Step 1 — Complete Pre-Installation Checks
UNPACK UNIT (See Fig. 1) — Move the unit to final loca-
tion. Remove unit from carton, being careful not to damage
service valves and grilles.
INSPECT SHIPMENT — File a claim with the shipping
company if shipment is damaged or incomplete. Check unit
nameplate 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, refrig-
erant piping, and servicing unit. See Fig. 2.
Locate unit so that condenser airflow is unrestricted on both
sides. Refer to Fig. 2.
Unit may 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.
MATCHING THE CONDENSING UNIT TO AN
INDOOR UNIT — The 38HDF,HDR units can be matched to
a corresponding indoor unit. The 38HDF018-036 units can be
matched with an in-ceiling cassette or high wall indoor unit.
The 38HDR unit can be matched with under-ceiling and resi-
dential fan coils. Refer to separate indoor unit literature for
more information.
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. Elec-
trical shock can cause serious personal injury.
Puron® (R-410A) refrigerant systems operate at higher
pressures than standard R-22 systems. Do not use R-22 ser-
vice equipment or components on Puron refrigerant equip-
ment. If service equipment is not rated for Puron refrigerant,
equipment damage or personal injury may result.
38HDF018-036
Duct Free Condensing Units
38HDR018-060
Ducted Condensing Units
Fig. 1 — 38HDF,HDR Unit