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COMPONENT DEFINITIONS
A. Mechanical components
B. Electrical components
C. Hermetic components
Plenum assembly
Diffuser with directional louvers used to direct the conditioned airfl ow.
Blower wheel
Attaches to the indoor side of the fan motor shaft and is used for distributing unconditioned, room side air through
the heat exchanger and delivering conditioned air into the room.
Slinger fan blade
Attaches to the outdoor side of the fan motor shaft and is used to move outside air through the condenser coil, while
slinging condensate water out of the base pan and onto the condenser coil, thus lowering the temperature and
pressures within the coil.
Thermostat Control
Used to maintain the specifi ed room side comfort level.
System Switch
Used to regulate the operation of the fan motor and the compressor or to turn the unit off. For troubleshooting, refer
to the wiring diagrams and schematics in the back of this service manual.
Solid State Relay
Used to energize the compressor and fan motor. Each unit has 2, 50 amp, 208/230 volt relays.
Capacitor
Reduces line current and steadies the voltage supply, while greatly improving the torque characteristics of the fan
motor and compressor motor.
Fan Motor
Dual shafted fan motor operates the indoor blower wheel and the condenser fan blade simultaneously. (When unit
is turned on, the fan motor runs continuously).
Compressor
Motorized device used to compress refrigerant through the sealed system.
Low ambient bypass (hot gas bypass) valve
Used for low ambient cooling operation, the valve is connected between the discharge line at the compressor and
the suction process tube. It responds to suction pressure, whcih when reduced in the system, causes the valve to
open and bypass hot gas from the high pressure side to the low pressure side of the system. The valve is preset
to open when the suction pressure reaches 88 psig.
Capillary tube
A cylindrical metering device used to evenly distribute the fl ow of refrigerant to the heat exchanger (evaporator
coils).
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