Carrier WEATHERMASTER III 38HQ - Manual

Number One
AirConditbning
l\Mer
Division of
Carrier Corporation
Carrier Parkway • Syracus N Y 13221
Weathermaster III Dual-Compressor
Heat Pump
(Outdoor Coil Section; Indoor Compressor Section)
INDEX
Page
SAFETY CONSIDERATIONS ............................. I
INSTALLATION..................................................... 3
Step 1 — Check Equipment and Jobsite . 3
• UNPACKAGE UNITS
• INSPECT EQUIPMENT
• COMPLETE OR CONSIDER SYSTEM
REQUIREMENTS
Step 2 — Install Outdoor Coil
Section................................................. 4
• ON THE GROUND
• ON THE ROOF
Step 3 — Install Indoor Compressor
Section................................................. 5
Step 4 — Install Indoor Fan-Coil and
Electric Heater.................................... 5
Step 5 — Make Piping Connections................ 5
• REPLACE THE ACCURATER™
REFRIGERANT CONTROL PISTON(S)
• CONNECT REFRIGERANT LINES
Step 6 — Install Fan Control Package ... 6
Page
Step 7 — Install Outdoor Ambient
Switch................................................... 6
Step 8 — Install Room Thermostat,
Outdoor Thermostat(s) and
Emergency Heat Relay....................... 8
Step 9 — Make Electrical Connections... 8
• INSTALL A BRANCH CIRCUIT
DISCONNECT PER N.E.C.
• ROUTE LINE POWER LEADS INTO
COMPRESSOR SECTION
• CONNECT GROUND LEADS AND
POWER WIRES
• CONNECT POWER LEADS FROM
INDOOR COMPRESSOR SECTION
TO OUTDOOR COIL SECTION
• CONNECTCONTROL WIRING
INITIAL START-UP................................................9
SEQUENCE OF OPERATION.............................. 9
SERVICE.................................................................. II
MAINTENANCE .................................................... 15
SAFETY CONSIDERATIONS
Installation and servicing of air conditioning
equipment can be hazardous due to system pressure
and electrical components. Only trained and quali­
fied service personnel should install, repair or
service air conditioning equipment.
Untrained personnel can perform basic mainten­
ance functions of cleaning coils and filters and re­
placing filters. All other operations should be per­
formed by trained service personnel. When working
on air conditioning equipment, observe precautions
in the literature, tags and labels attached to the unit
and other safety precautions that may apply.
Follow all safety codes. Wear safety glasses and
work gloves. Use quenching cloth for brazing opera­
tions. Have fire extinguisher available for all brazing
operations.
© Carrier Corporation 1979 Form 38HQ-6SI