High and low temperature box filling operation method of freon refrigeration system

high and low temperature box filling freon refrigeration system operation method is as follows:

1, prepare a scale, weighing the freon cylinders, records of usury, gross weight.

2, put the cylinder on the scale, with the x1 copper tube, with authoritarian threads on one end connected to the cylinder, the other end to a compressor suction valve of the multi-purpose on channel, multi-purpose channel nut will not enter the wrenching, first open the cylinders, then turn off again, is the sort of air inside the receiving, then the nut and tighten.

3, freon are filling the wet steam way, so to properly when you opened the steel cylinder valves, liquid impact to prevent compressor attack. Unscrew the multi-purpose channel on the compressor suction valve together and start filling refrigerant. If the system is a vacuum situation, the refrigerant inside the cylinder can be injection system actively, stay inside the system pressure balance, pressure and the cylinder cooling punishment enters suspend. At this time if the system refrigeration dose not foot, can first closed steel cylinder valves, accumulator outlet valve, expansion valve and the compressor suction valve manually, a condenser cooling water pump, and then to start the compressor. In order to avoid the liquid cylinder, and should be gradually open the suction valve, all the refrigerant system pumped in accumulator, some and is pumped into the vacuum system of low pressure, and then opened the steel cylinder valves, let the refrigerant active pumping system again.

4, so repeated, foot system until the required refrigeration dose. Can after the system was sleeve into vacuum, opened the accumulator outlet valve and small open expansion valve, let the system normal operation, and then opened the steel cylinder valves, and gradually close the suction valve ( The open multi-purpose channel) , let the refrigerant in a cylinder, depending on the difference between the pressure and suction pressure into the bottle and system ( Should pay attention to not liquid impact) 。 When filling to meet the requirements, want to go to the closed steel cylinder valves, then have receive the residual refrigerant sucked into system as much as possible, eventually closed multi-purpose channel, to suspend the compressor operation, filling refrigerant basic to complete homework.

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