A/A DC INVERTER U-MATCH AIR CONDITIONERS INSTALLATION
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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.
Loosing the cord of liquid valve until the pressure rise to 0 bar.
Dismantle the tube from the cover of the inlet for refrigerant then, tighten the cover.
Loose the valve cord of the gas valve as well as the liquid valve entirely.
