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46 TRG-TRC005-EN
notes
period six
Review
Period Five discussed several accessories commonly used in comfort-cooling
applications, including: solenoid valve, liquid-line filter drier, moisture-
indicating sight glass, suction line filter, hot gas muffler, shutoff valve, and
access port.
The solenoid valve is used to stop the flow of refrigerant within the system. A
liquid-line filter drier prevents moisture and foreign matter from damaging the
valves or compressor. The moisture-indicating sight glass permits the operator
to observe the condition of the refrigerant within the liquid line before it enters
the expansion device. A suction line filter protects the compressor from foreign
matter in the suction line. The hot gas muffler is used to reduce noise and
vibration associated with reciprocating compressors. Shutoff valves are used to
isolate one part of the refrigeration system, and access ports allow a technician
to gain access to the system for charging or measurement.
Review—Period Five
sight
sight
glass
glass
solenoid
solenoid
valve
valve
access
access
port
port
shutoff
shutoff
valve
valve
TXV
TXV
condenser
condenser
evaporator
evaporator
compressor
compressor
liquid-line
liquid-line
filter drier
filter drier
suction
suction
line filter
line filter
Figure 66