DC INVERTER U-MATCH AIR CONDITIONERS INSTALLATION
Remove the 1-way cap from the gas valve.
Use the hexagonal socket spanner to rotate the element of liquid valve for 1/4 turns and use the
screwdriver to prop up the element of gas valve to discharge the gas.
Discharge the gas for 15 seconds, until refrigerant gas appears. The, immediately close the 1-way
valve and tighten the valve cap.
Open the element of liquid valve and gas valve to full (See Fig. 3-1-4).
Figure 3-1-4
Tighten the valve cap and then use soap water or leakage detector to check the connection
between outdoor unit and pipe for any leakage.
Caution
If possible, it is best to discharge the air out of the machine from the valve by using vacuum pump.
To establish vacuum by using vacuum pump, please operate as follows:
Take out the nut cover of the inlet for refrigerant.
Connect the tube of the vacuum watch with the vacuum pump, having the low-pressure end linking
to the inlet for refrigerant. (As shown in Figure 3-1-5)
Figure 3-1-5
Starting the vacuum pump, when the indicator turns to-1 bar, closing the low pressure handle and
stopping vacuumize. Keep for 15 minutes, ensuring the pressure of the vacuum watch remains.
Take out the valve cover of the gas valve together with the liquid valve.
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