How to Add Refrigerant (R22) to Household Air Conditioners?

How to Add Refrigerant Gas to Air Conditioner?

1. Turn on the air conditioner in cooling mode (the temperature sensor can be placed in hot water if it cannot be turned on in winter), and the refrigerant pipe is connected to the interface of the external machine.

2. Open the refrigerant cylinder valve and the three-way valve of the pressure gauge (note: the cylinder is placed upright, do not stand upside down), and start filling the freon. After filling for a period of time, close the valve of the cylinder and check the reading of the pressure gauge (the reading will slowly fall back and finally stop). Generally, it needs to be added to 0.4-0.5MPa in summer, and about 0.3MPa in winter.

Adding the refrigerant to the air conditioner is complete!

Note: If the refrigerant has leaked light, the refrigerant can be added quantitatively. According to the filling amount set by the air conditioner, use a scale to add refrigerant gas according to the standard filling amount. The refrigerant type and filling amount are marked on the external unit, and you can check it yourself.

Frequently Asked Questions about Adding Refrigerant to Air Conditioners

1. How long does it usually take to add refrigerant to the air conditioner?

Answer: Different air conditioners add refrigerant at different times, and there is no standard. According to general experience, most 1.5 hp air conditioners take about 3-10 minutes.

2. Do all air conditioners use R22 refrigerant?

Answer: No. Under normal circumstances, ordinary air conditioners use R22, inverter air conditioners use R410A, and automotive air conditioners use R134A. The nameplate on the upper side of the outdoor unit of the air conditioner indicates the type of refrigerant and the amount to be filled, you can check it yourself.

3. Do I need to vent the air before adding refrigerant?

Answer: If there is still refrigerant in your air conditioner, there is no need to exhaust air; if the refrigerant has leaked, you need to exhaust air first.

4. Should I add more refrigerant to the air conditioner?

Answer: No. Many people think that it is better to add more refrigerant to the air conditioner. In fact, the damage of excessive fluoride to the air conditioner far exceeds the damage of fluoride deficiency. Too much refrigerant can cause insufficient space in the system piping for the liquid to vaporize, resulting in poor air conditioning cooling.

5. Why is the refrigerant effect still very poor when the air conditioner with refrigerant gas has just been added?

Answer: The possible reason is that there is a leak in the pipeline of the air conditioning and refrigeration system, and the added refrigerant leaks again. You need to plug the leak point first and then add refrigerant gas again. The dust accumulation on the air conditioner radiator seriously affects the heat dissipation effect, and the radiator needs to be cleaned. The air conditioner is filled with inferior refrigerant. In addition to the poor cooling effect, it will also corrode the compressor and cause the air conditioner to be scrapped. It is recommended that you drain the counterfeit refrigerant in the system and refill it with genuine refrigerant.