GEM0650/0956/1256 Remote | Operation: Refrigeration |
Beginning at the compressor, the refrigerant is compressed into a high temperature gas. The discharge line directs this gas to the condenser and to the head pressure control. At the remote condenser the gas is cooled by air and it then condenses into a liquid. This high pressure liquid then goes through the liquid line connection at the head pressure control. If the head pressure is high enough the liquid refrigerant will go through the valve and enter the receiver. From the receiver, the liquid refrigerant flows through the liquid line valve and then to the expansion valve.
The thermostatic expansion valve meters liquid refrigerant into the evaporator, the volume of liquid refrigerant depending upon the temperature of the evaporator; warmer evaporators get more refrigerant and colder evaporators get less. At the evaporator, the refrigerant enters an area of relatively low pressure, where it can easily “boil off” or evaporate. As it evaporates, it absorbs heat from the evaporator and whatever is in contact with it (such as the water inside it). After the evaporator, the refrigerant, now a low pressure vapor, goes through the suction line back to the compressor, where the cycle is repeated.
Refrigeration Schematic
Remote Condenser
Discharge | Liquid Line |
Line |
Detail of Head Pressure Control Valve
Liquid Line Valve
Thermostatic Expansion Valve
Head PressureEvaporator Control Valve
Receiver |
| Compressor | Page 21 | Suction Line |
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