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Free match split type air conditioner / Installation Manual
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Note:
If there is no change in system pressure, unscrew the cap from the packed valve
(high pressure valve). If there is a change in system pressure, there may be a gas leak.
8. Insert hexagonal wrench into the packed valve (high pressure valve) and open the valve by turning
the wrench 1/4 counterclockwise. Listen for gas to exit the system, then close the valve after
5 seconds.
Flare nut
Valve stem
Valve body
Cap
Fig. 9.2
9. Watch the pressure gauge for one minute to make sure that there is no change in pressure. It should
read slightly higher than the atmospheric pressure.
10. Remove the charge hose from the service port.
11. Using hexagonal wrench, fully open both the high pressure and low pressure valves.
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Open valve stems gently
When opening the valve stems, turn the hexagonal wrench until it hits against the stopper.
Do not try to force the valve to open further.
12. Tighten valve caps by hand, then tighten it using the proper tool.
13. If the outdoor unit uses all vacuum valves, and the vacuum position is at the main valve, the system
is not connected with the indoor unit. The valve must be tightened with a screw nut. Check for gas
leaks before operation to prevent leakage.
9
Air evacuation