OUTDOOR UNIT CONTROS and COMPONENTS
PAGE 12
ENGLISH
4-Way Valve
Electronic Expansion Valve
Accumulator
Refrigerant Strainers
The 4-Way Valve redirects the flow of refrigerant to reverse the
functions of the indoor and outdoor coils. When de-energized
in COOL MODE, the valve will direct the refrigerant hot gas to
the outdoor coil.When energized in HEAT MODE, the valve will
direct the hot gas to the indoor coil.
The direction of flow is changed by an electrical solenoid that
moves an internal slide mechanism.
The 4-Way Valve is electrically connected to the PCB at
CN10 (09k and 12k), or CN11 (18k and 24k).
The valve consists of an electrical operator and a valve
body with internal variable size orifice. When operating,
the PCB will send pulses of voltage to the electrical operator.
The operator will then magnetically move the position
of the metering orifice pin to vary the flow of refrigerant.
The pin position is determined from the Suction Line
Temperature Sensor input, which will change the flow
of refrigerant to maintain proper operating superheat.
During COOL MODE operation, the valve meters low
pressure refrigerant to the indoor coil. During HEAT MODE
operation, the valve meters low pressure refrigerant to the
outdoor coil.
The Accumulator is located in the suction line at the entrance
to the compressor.The accumulator helps prevent liquid
refrigerant from entering the compressor .
The system has debris-catching strainers that protect internal
system components from contaminants.The straineris
a permanent part that is not typically replaced.
Summary of Contents for ASYW09CRAWA
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