Question 200Refrigeration & AC - 1st Asst/Chief

70% to pass

While recharging a commercial type refrigerator, with a hermetically sealed compressor with no pressure gauges, what could you use or do to achieve a proper full charge?

ACharge until you hear the compressor loading up, check refrigerator temperatures.

BCheck nameplate for compressor's full load amperage and charge until that amperage is reached.

CCharge partially and observe refrigerator's temperatures. Add more if necessary.

DOvercharge and observe refrigerator's temperatures, evacuate excess refrigerant until thermostat control is achieved.

AI Explanation

The correct answer is B) Check nameplate for compressor's full load amperage and charge until that amperage is reached. This is the correct answer because, without pressure gauges, the proper refrigerant charge can be determined by monitoring the compressor's current draw. The nameplate on the compressor will list the full load amperage, which indicates the maximum current draw of the compressor when it is fully loaded. Charging the system until the compressor reaches this full load amperage ensures the system is properly charged. The other options are incorrect because they do not provide a reliable way to determine the proper refrigerant charge without pressure gauges. Relying solely on temperature readings or overcharging and then evacuating excess refrigerant can lead to improper charging and potential system damage.

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