How to add refrigerant to sprinkler air conditioning system

Now the scale of the use of sprinklers is relatively wide, whether it is summer or winter, it is able to carry out sprinkling, then how to increase the refrigerant in the summer sprinkler air conditioning system? How does the engine keep warm in winter? Today we sprinkler manufacturers to inform us! The sprinkler is equipped with a pressure gauge, one end of the green hose is connected to the middle of the pressure gauge, the other end is connected to the vacuum pump, and then the vacuum operation is carried out.
Install refrigerant tank. Put the filling tank device on the branch barometer, completely close the valves on the pressure side and high pressure side of the branch barometer, connect the refrigerant tank device to the green filling hose in the center of the branch barometer, roll the handle clockwise until the needle valve drills a hole in the refrigerant tank, roll the handle counterclockwise to exit the needle valve, press the air removal valve of the branch barometer, and release air until the refrigerant is released from the valve.

Add refrigerant from the high pressure side. When the engine is not working, open the valve on the high pressure side and take in the refrigerant until the pressure value of the low pressure gauge is about 0 or 98MPA. After filling, close the valve. Check the leakage, and use the electronic leak detector to detect the leakage condition of the system. Fill the refrigerant from the low pressure side, close the valve on the high pressure side, start the engine and run the air conditioner, turn over the pipe pressure gauge, and join the specified refrigerant.