How to correctly use of household air conditioning pressure gauge
5) heat pump air conditioning indoor unit and the connection part of pipe leak detection should be under the heating operation state, because of the inspected parts under high pressure, easy to find funnelled.
General family expenses air conditioning don't have the pressure gauge, when maintenance will connect pressure gauge measurement
1) check for the temperature of the fluid tube and muffler and condensation. Start the air conditioning runs under the condition of refrigeration 20 min, if any condensation on the outdoor unit back to the valve and the muffler, muffler fingered temperature was lower than that for the temperature of the fluid pipe, shows refrigerant in the system is enough, air conditioning running normally. Has one of following cases, indicates lack of refrigeration: (1) for the liquid condensation tube, muffler condensation; (2) for liquid pipe frost; (3) for liquid tube not dewing cool, muffler, nor too cold; (4) for fluid pipe and trachea is not cool. (2) measure the pressure of the valve in the back. Add the pressure gauge connected to air conditioning low pressure Angle valve inlet, measuring its operation at low pressure, under normal circumstances, when the environment temperature is about 30 ℃, refrigeration operation of low pressure is 0.45 ~ 0.55 Mpa, in heat pump air conditioning heating runtime should be 1.8 Mpa, if under the pressure, shows lack of refrigerant. The lower the pressure, the greater the leakage. If the basic pressure, explain refrigerant has. (3) fill nitrogen pressure (1.5 Mpa nitrogen filling the), observe the four two connecting pipe joint, gas liquid valve stem, and whether there is oil stains in areas such as the liquid mouth. There are oil stains for leaks. (4) using the leak detector to find the general part, and then coated with soap and water, if there are air bubbles appeared, to be funnelled namely.
