Refrigeration - Initial Start-Up - Freezer

1. Thermostat calls for refrigerant.



2. Liquid line solenoid valve opens, allowing refrigerant to flow.



3. Pressure control makes the control circuit and the condensing unit operate.



4. The coil temperature falls to approximately 20°F and the evaporator fans come on. (Note: The fans may cycle two or three times until the room temperature is stabilized.)



5. When the room thermostat is satisfied, the liquid line solenoid will close, and the compressor will pump down and turn off. (Fan on unit cooler will continue to run.)

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