When adding oil to a refrigeration system precaut
When adding oil to a refrigeration system, precautions must be taken to ensure that
A.the compressor suction pressure is not too high
B.all air is purged from the pump and charging fittings
C.the high pressure cutout switch is held open to prevent accidental starting
D.the condenser is completely shutdown first
请帮忙给出正确答案和分析，谢谢！
参考解答
46j***780
2024-06-15 02:35:45
正确答案：B
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