Question 172Refrigeration & AC - Assistant Engineer
70% to passWhen a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, what should be done to compensate for or to correct this situation?
Araise the high-pressure cut-out opening pressure
Bincrease the amount of cooling water to the condenser
Cdecrease the amount of cooling water to the condenser
Dremove some refrigerant from the system
AI Explanation
The correct answer is D) remove some refrigerant from the system. When a refrigeration compressor has a high head pressure due to an overcharge of refrigerant, the solution is to remove some of the excess refrigerant from the system. This will lower the high pressure and bring the system back to its normal operating parameters. Raising the high-pressure cut-out (option A) or decreasing the condenser cooling water (option C) would not address the root cause of the high pressure, which is the excess refrigerant. Increasing the condenser cooling water (option B) may help lower the pressure temporarily, but the underlying issue of the refrigerant overcharge would still remain.
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