Inspection issues of the frozen main pipe
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When servicing the main refrigeration pipeline in the maintenance workshop, why is it necessary to close the inlet pipeline valve first, and then the outlet pipeline valve? I personally think it doesn’t matter, but the manager said that if the outlet valve is closed first, the pressure will be very high. I really don’t understand this – since the refrigerant return pipe and the refrigerant inlet pipe aren’t directly connected to each other, how can the pressure increase just by closing the refrigerant return pipe? I would appreciate your advice as well, thank you!
Is the outlet of your water pump what you here call the inlet or the outlet? I think it’s probably the inlet, so it can’t be turned off first