Advertisement
CONDENSER FAN MOTOR
AND COMPRESSOR ACCESS
Remove (7) screws
FAN
Remove (4) nuts
REMOVE (7) SCREWS
SECURING FAN GUARD.
REMOVE FAN GUARD/FAN
ASSEMBLY.
FIGURE 10
DANGER
Make sure all power is disconnected before
beginning electrical service procedures.
FAN GUARD
WIRING
ALIGN FAN HUB
FLUSH WITH
MOTOR SHAFT
12HPB REFRIGERATION COMPONENTS
DISCHARGE
DISTRIBUTOR
DEFROST
THERMOSTAT
MUFFLER
CHECK AND
EXPANSION VALVE
FILTER/DRIER
FIGURE 11
C − Outdoor Fan Motor
All units use single−phase PSC fan motors which require a run
capacitor. In all units, the condenser fan is controlled by
the compressor contactor.
ELECTRICAL DATA tables in this manual show specifi-
cations for condenser fans used in 12HPBs.
Access to the condenser fan motor on all units is gained
by removing the seven screws securing the fan assem-
bly. See figure 10. The condenser fan motor is removed
from the fan guard by removing the four nuts found on
the top panel. If condenser fan motor must be replaced,
align fan hub flush with motor shaft. Drip loops should
be used in wiring when servicing motor.
D − Reversing Valve L1 and Solenoid
A refrigerant reversing valve with electromechanical so-
lenoid is used to reverse refrigerant flow during unit op-
eration. The reversing valve requires no maintenance. It
is not repairable. If the reversing valve has failed, it must
be replaced.
If replacement is necessary, access reversing valve by re-
moving the outdoor fan motor. Refer to figure 10.
II − REFRIGERANT SYSTEM
See figure 11 for unit refrigerant components. Refer to figure
12 and 13 for refrigerant flow in the heating and cooling
modes. The reversing valve is energized during cooling
demand and during defrost.
LINE
(BI−FLOW)
PRESSURE TAP
FITTING
Page 8
SUCTION LINE
VAPOR LINE
REVERSING
VALVE
PROCESS
COUPLING
VAPOR LINE
SERVICE
VALVE
LIQUID LINE
SERVICE VALVE
SUCTION LINE
Advertisement
