Carrier 50YQ - Manual

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AirConditbning
Maker
e
Division of
Carrier Cotporalio
installation, Start-llp
and Service instructior^
Carrier Parkway • Syracuse NY 13221
Single-Package Heat Pumps
INDEX
Page
1
, 1-4
. 1
SAFETY CONSIDERATIONS .........................
INSTALLATION.................................................
Step 1 — Check Equipment and Jobsite
• UNPACKAGE UNITS
• INSPECT EQUIPMENT
• COMPLETE OR CONSIDER SYSTEM
REQUIREMENTS
Step 2 — Mount Heat Pump Package ..
• ON THE GROUND: MOUNT HEAT
PUMP ON AN ELEVATED FRAME
POSITIONED ON A LEVEL CON­
CRETE PAD
• ON THE ROOF: MOUNT UNIT ON A
LEVEL PLATFORM OR FRAME
Step 3 — Make Ductwork Connections
• CONNECT SUPPLY AND RETURN
AIR DUCTWORK
^ 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 main­
tenance functions of cleaning coils and filters and
replacing 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 oper­
ations. Have fire extinguisher available for all braz­
ing operations.
Step 4 — Provide for Cooling Cycle
Condensate Disposal for Cooling Cycle
... 4
• CONNECT DRAIN LINE
^Step 5 — Make Electrical Connections ... 4
• INSTALL A BRANCH CIRCUIT
DISCONNECT PER NEC
• ROUTE LINE POWER WIRES INTO
UNIT
• CONNECT GROUND LEAD TO GROUND
LUG IN SPLICE BOX FOR SAFETY
• SET INDOOR FAN MOTOR SPEED
• ROUTE CONTROL POWER WIRES
• ELECTRIC HEATER INSTALLATION
START-UP.............................................................5-7
SERVICE .............................................................7-14
V TROUBLESHOOTING.................................. 15, 16
INSTALLATION
Step 1 — Check Equipment and Jobsite
UNPACKAGE UNITS — Move units to final loca­
tion. Slide units from cartons taking special care nob
to damage unit.
INSPECT EQUIPMENT — File claim with ship­
ping company if shipment is damaged or incomplete.
COMPLETE OR CONSIDER SYSTEM RE­
QUIREMENTS before installing the 50YQ units.
Consult local building codes and National Elec­
trical Code (NEC) for special installation
requirements.
Provide sufficient space for coil airflow clearance,
wiring, and servicing unit. (See Fig. 1.) Locate unit
where supply and return air ducts can be con­
veniently brought out to unit duct connections.
Unit may be placed with duct side as close to
building as condensate drain, top removal, duct con­
nections and power connections permit. Position
unit so water or ice from roof does not drop directly
on top of unit or in front of coil. Make provisions for
condensate drainage and defrost water disposal.
Roof installation method for 50YQ depends on
building construction and special requirements of
local building codes. Ensure that roof can support
unit weight. Protect unit from prevailing winds to
ensure adequate defrost.
© Carrier Corporation 1979 781 Form 50YQ-3SI