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3. Fully open the handle Lo of the manifold valve.
4. Operate the vacuum pump to evacuate. After starting evacuation, Slightly loose the flare nut of the
Lo valve on the gas pipe side and check that the air is entering (Operation noise of the vacuum pump
changes and a compound meter indicates 0 instead of minus)
5. after the evacuation is complete, fully close the handle Lo of the manifold valve and stop the
operation of the vacuum pump. Make evacuation for 15 minutes or more and check that the
compound meter indicates-76cmHg (-1x105Pa).
6. Turn the stem of the packed valve B about45° counterclockwise for 6~7 seconds after the gas
coming out, then tighten the flare nut again. Make sure the pressure display in the pressure indicator
is a little higher than the atmosphere pressure.
7. Remove the charge hose from the Low pressure charge hose.
8. Fully open the packed valve stems B and A.
9. Securely tighten the cap of the packed valve.
Vacuum
Vacuum for indoor units separately.
11. Safety and leakage check
11.1 Electrical safety check
Perform the electric safe check after completing installation:
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