Question 160Refrigeration/AC - Assistant Engineer70% to pass
When starting a reciprocating refrigeration compressor that has been shut down for a period of time, you should manually throttle which valve?
AI Explanation
The correct answer is B) suction valve.
When starting a reciprocating refrigeration compressor that has been shut down for a period of time, you should manually throttle the suction valve. This is done to prevent a sudden rush of refrigerant into the compressor, which could damage the compressor. Throttling the suction valve allows the compressor to gradually build up pressure and draw in refrigerant at a controlled rate, protecting the system.
The other options are incorrect because the king valve is not involved in this process, the expansion valve controls the flow of refrigerant into the evaporator, and the sea water valve is not directly related to starting the compressor.
Related Questions
#158 When opening or closing compressor service and line isolation valves on a typical refrigeration system that is fitted with packed valves, what must you do? #159 What is the purpose of running a refrigeration compressor in short intermittent spurts or throttling the suction isolation valve when starting the system after a prolonged shutdown? #161 Concerning the operation of refrigeration systems, frosting or sweating of a liquid line is usually indicative of what condition? #162 The surging that occurs in a centrifugal air conditioning compressor is a result of what conditions? #163 In an air conditioning system, low discharge head pressure associated with a reciprocating compressor can be the result of what condition?