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16 Cards in this Set
- Front
- Back
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What are the two components that control box temperature?
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Box Thermostatic Switch and Box Solenoid Valve
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On a Detroit Switch, how do you adjust the cut-in point?
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Adjust the Range screw, located on the right side of the switch
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On a Detroit Switch, how do you adjust the cut-out point?
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Adjust the Differential screw.
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What type of condenser is used in the refrigeration system?
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Shell and Tube design. It has four passes of cooling water to remove the heat.
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What is the purpose of the salt water strainer in a refrigeration system?
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Protects the salt water system from foreign material entering the Condenser and Water Regulating Valve
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Explain the purpose of the Liquid Feed Control Strainer strainer.
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Strains foreign material from entering the Box Solenoid Valve and Thermal Expansion Valve.
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What is the function of the Water Regulating Valve on a water cooled conderser?
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Regulates the flow of water according to the amount of heat to be dissipated.
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Explain the function of the Compressor Crankcase Heater.
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Function is to keep the oil warm during the Compressor shutdown period. Allowing lube oil and refrigerant to seperate.
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Name two types of Noise Control Devices in a refrigeration plant.
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Resilent Mounts and Flexible Hoses
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What is the purpose of the Oil Recovery System in a refrigeration plant?
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Recovers lube oil from the refrigerant system, returns the lube oil back to the compressor sump.
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Name three type of valves used in a refrigeration system.
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Packless, Packed, and Service Valves
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How do you figure out Superheat?
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Difference between Boiling Temperature in the Evaporator and Tail Coil Temperature.
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What is a Step Down Transformer in an electrical diagram for a refrigeration system?
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Electrical reducer from 440 Volts to 110 Volts.
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What is the most common type of compressor in a refrigeration plant?
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Rotary Compressor
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What is the only moving part in a Rotary Compressor?
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Rotor Assembly
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What is used to heat the lube oil in the lube oil system in a Rotary Compressor?
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A Self-Regulating Heat Tape. It maintains lube oil temperature at 140 degrees F to 160 degrees F.
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