1.The observation method
It indicates the proper amount of refrigerant when moisture condenses on the high-pressure pipe that touches icy and moisture condenses as well on the low pressure pipe, which touches cool with the temperature around 3℃ higher than that of the high-pressure pipe. It indicates that the amount of refrigerant is insufficient and refrigerant filling becomes necessary if there is no moisture condensing on the low-pressure pipe, which touches warm. However it indicates the extra amount of refrigerant and the necessity to let out a certain amount of refrigerant when moisture condenses on the low-pressure pipe and it takes around one minute to start the compressor each time. Also the frost formed on the low-pressure pipe turns into moisture later on.
2.The current method
Detect the operating current of the outdoor unit (including the compressor and the current of fan) with an ammeter. It indicates the proper amount of refrigerant if the current value basically conforms to the rated current marked on the rating plate. But if it’s much lower than the rated value, it indicates the insufficient amount of refrigerant and the necessity to fill some.
The gauge pressure method
Water chiller begins to work after the low pressure valve is connected to the pressure gauge. The gauge pressure drops at the start. But if it fixes at around 0.49MPa after the running for more than ten minutes, it indicates the normal operation of the water chiller.
Moreover, the reason for refrigerant filling mainly lies in refrigerant leakage. If refrigerant leakage occurs, please call the industrial water chiller manufacturer for repairing welding or refrigerant filling. With a warranty period of 2 years, S&A industrial water chiller can free you from any worry.
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