Samsung Electronics 210
Piping Diagram
Solenoid Valve - Accumulator Oil Return (ARV)
ƒ Purpose
Return oil stagnating in the accumulator.
ƒ Concept
- During compressor operation, the valve is opened to return oil stagnating in the accumulator.
- The valve
is closed to protect the compressor in start-up mode or in a section where there is concern about the potential for
liquid compression due to low DS
H.
ƒ Control specifications in detail
- Condition(s) required to close (Off) the valve : [ A or B or C ]
A. The system has stopped
B. DSH is higher than 10 K during start-up
C. Th
e valve is closed for 2 minutes if DSH is higher than 10 K in air conditioning mode.
- Condition(s) required to open (On) the valve : None of the conditions
required to close the valve are satisfied.
Compressor Coil Heater (CCH)
ƒ Purpose
Prevent compressor failure due to liquid compression or poor lubrication during compressor start-up.
ƒ Concept
If the internal temperature of an inactiv
e compressor is abnormally low, the internal temperature is increased through the CCH to
evaporate the liquid refrigerant that has flowed into the
compressor. This will prevent liquid compression and poor lubrication.
ƒ Control specifications in detail
- It is turned On if A or B is satisfied.
A. The highest temperature o
f the compressor has remained below 50ఁ for 2 min.
B. The CCH has been Off for longer than 6 hours.
- Condition(s) required to turn Off the CC
H: [ A or B ]
A. The highest temperature of the compressor has remained above 55ఁ for 30 min.
B. The CCH has been On for longer than 6
hours.
7-3 Functions (cont.)
7-3-2-1 Actuator (cont.)
7-3-2 Control (cont.)
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