![]() ![]() ![]() Safety lockout The thermostatic refrigeration controller produces mechanical when subjected to _ fluctuations in the cooled medium. Pressure One of the most important secondary controls in a refrigerating system is the refrigerant flow control used to regulate the amount of liquid refrigerant flowing into the: Evaporator With the direct type of temperature-actuated refrigeration control the thermostat is located directly in the: Space to be cooled Flow switches are used on chilled water and cooling water lines and air ducts are used as _ switches. The CSA B52 Mechanical Refrigeration Code requires that the pressure limiting device be designed to stop the action of the compressor or generator at a pressure not more than _ of the system high side design pressure 90% The operation of the compressor (starting, stopping, and unloading) may be accomplished by a _ type of actuated control. ![]() Operating or primary The low oil sump temperature protection device prevents the compressor from starting if the oil temperature falls below a pre-set value so that: Any refrigerant dissolved in the oil is separated from the lubricant. The pressure-actuated refrigeration control is actuated by the: Suction pressure of the compressor One of the three distinct classes of refrigeration controls is the _ control. ![]()
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