How to use refrigerant to empty the air conditioner after installation

How to use refrigerant to empty the air conditioner after installation

Air, moisture and impurities contained in the air will cause pressure increase, current increase, noise increase, and power consumption increase in the air conditioner system, which will reduce the cooling (heat) capacity, and may also cause ice blockage and dirty blockage. Wait for failure.

　　 At present, the air discharged from the indoor unit and pipeline is mostly ejected by the refrigerant of the outdoor unit:

　　01) Open the air pipe connecting the pipeline between the indoor unit and the outdoor unit;

　　02) Use a hexagon wrench to open the valve of the two-way stop valve on the outdoor unit to ensure that the refrigerant can enter the indoor unit pipeline;

　　03) As the refrigerant slowly enters the indoor unit pipeline, the refrigerant gradually occupies the pipeline, ejects the gas in the indoor unit pipeline, and discharges it from the opening of the disconnected thick pipe (trachea);

　　04). When the refrigerant is seen to be discharged, quickly connect the air pipe to the three-way shut-off valve, tighten the holder, and the exhaust operation is completed.

　　 Note:

　　1) The 30s exhaust time mentioned here is just a reference value. In actual operation, the exhaust time must be controlled by feeling whether the sprayed gas is getting cold.

2) Mastering the exhaust time is very important for the use of air conditioners, because the exhaust time is too long, the refrigerant in the refrigeration system will be excessively lost, which will affect the cooling effect of the air conditioner; the exhaust time is too short, The air in the indoor unit and pipeline is not exhausted, which will also affect the cooling effect of the air conditioner.

　　3) Inverter air conditioners must be evacuated by vacuuming, because this type of air conditioner mostly uses R410a refrigerant. This refrigerant is mixed in strict accordance with a certain proportion. If part of the gas is discharged by the headspace method, the proportion of the refrigerant will change and affect the refrigeration effect (after about one year of use, the effect on the refrigeration effect is obvious), so it cannot The refrigerant headspace method is adopted.