Samsung Electronics 230
Piping Diagram
Solenoid Valve – Main EEV
▪ Purpose
▪ Concept
-
As a result, there is insufficient refrigerant in active indoor units that are under heating mode.
- HR Only
▪ Control specifications in detail
In main cooling mode, the valve is Off (closed).
Solenoid Valve – Main Cooling
▪ Purpose
In main cooling mode, enable operation of heating indoor units.
▪ Concept
- In main cooling mode, the valve is opened to send the high pressure to heating indoor units and enable heating.
- HR Only
▪ Control specifications in detail
In main cooling mode, the valve is On (opened)
7-3 Functions (cont.)
7-3-2-1 Actuator (cont.)
7-3-2 Control (cont.)
Solenoid Valve - Accumulator Oil Return (ARV)
▪ Purpose
Return oil stagnating in the accumulator.
▪ Concept
- During compressor operation, the valve is opened to return oil stagnating in the accumulator.
-
▪ 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. The 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)
▪ Purpose
Prevent compressor failure due to liquid compression or poor lubrication during compressor start-up.
▪ Concept
-
▪ Control specifications in detail
- It is turned On if A or B is satisfied.
℃ for 2 min.
B. The CCH has been Off for longer than 6 hours.
- Condition(s) required to turn Off the CCH: [ A or B ]
A. The highest temperature of the compressor has remained above 55℃ for 30 min.
B. The CCH has been On for longer than 6 hours.
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