How to connect the household air conditioner pressure gauge?
Before adding snow to open air conditioning, after the external machine started, the table connected to air conditioning gas nozzle (to receive a relatively thick that housekeeper, air-conditioning pressure in general 2.8MPA
To buy a pressure gauge, there are 2 add liquid pipe connected to the air conditioner outside the machine on the line
1) check the temperature and condensation of the liquid supply pipe and the return air pipe. Start the air conditioning operation 20min in the cooling case, if the outdoor unit valve and return pipe of condensation, touch the return pipe temperature was lower than the liquid supply tube temperature of the refrigerant in the system that is sufficient, the normal operation of air conditioning. One of the following circumstances, is that: the lack of refrigeration liquid supply tube condensation return pipe without dew; the liquid supply pipe and a liquid supply tube frosting; no dew public cold, back to the trachea is cool; the liquid supply pipe and gas tubes are not cool. (2) measure the pressure at the return valve. The pressure gauge is connected to the liquid air pressure angle valve, low pressure measured during operation, under normal circumstances, when the environment temperature is 30 degrees Celsius, low pressure cooling operation for 0.45~0.55Mpa heat pump type air conditioner should be 1.8Mpa in the heating operation, if less than the pressure, the shortage of refrigerant. The lower the pressure, the greater the leakage. If no pressure, then the refrigerant has leaked.(3) nitrogen pressure (filling 1.5Mpa nitrogen), four joint observation of two connecting pipes, gas valve stem, part of the liquid inlet and whether the oil spill that traces of oil.(4) use the tester to find out the general part of the leak, and then spread it on soapy water. If there is a bubble, it is the leak point.(5) the leak detection of the indoor unit and the connecting pipe of the heat pump type air conditioner shall be carried out under the condition of heating operation, because the inspected part is in a high pressure state at this time, and it is easier to find the leak point.
