Refrigeration Controls and Accessories Flashcard

Front

What is the primary purpose of line voltage thermostats in refrigeration systems?

Back

To control the temperature

Front

Which type of thermostat helps prevent excessive coil frost in medium temperature equipment?

Back

Coil Temperature Sensing Thermostat

Front

In a refrigeration system, what does the term "cut-in" refer to?

Back

The temperature at which the compressor starts.

Front

What is the main function of a suction service valve?

Back

To isolate the compressor

Front

When is it safe to front seat the discharge service valve?

Back

When the compressor is off

Front

What does a solenoid valve primarily control in a refrigeration system? Options: Oil circulation, Refrigerant flow, Temperature, Pressure

Back

Refrigerant flow

Front

What is the purpose of a Crankcase Pressure Regulator (CPR)?

Back

To prevent compressor overload during hot pull down

Front

Which type of pressure control opens on a rise in pressure? Options: Low Pressure Control, High Pressure Control, Oil Safety Switch, Low Ambient Fan Control

Back

High Pressure Control

Front

What is the primary function of an oil separator in a refrigeration system?

Back

To separate oil from discharge gas

Front

When should a liquid line filter drier be installed?

Back

Whenever the system is opened for service and after a compressor burnout.