VMH InverterFlex | INSTALLATION MANUAL | Heat Controller, Inc. |
Air Purging
•When relocating the unit to another place, perform evacuation using vacuum pump.
•Make sure the refrigerant added into the air conditioner is liquid form.
Caution in handling the packed valve
•Open the valve stem until it hits against the stop. Do not try to open it further.
•Securely tighten the valve stem cap with a spanner or the like.
•Valve stem cap tightening torque (see tightening torque table).
When Using the Vacuum Pump
(For method of using a manifold valve, refer to its operation manual.)
1.Completely tighten the flare nuts, A, B, C, D, connect the mani- fold valve charge hose to a charge port of the
2.Connect the charge hose connection to the vacuum pump.
3.Fully open the Lo handle of the manifold valve.
4.Operate the vacuum pump to evacuate. After starting evacua- tion, slightly loose theflare 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 Lo handle
of the manifold valve and stop the operation of the vacuum pump. Evacuate for 15 minutes or more and check that the compound meter indicates
6.Turn the stem of the packed valve B about 45° counterclock- wise for 6~7 seconds after the gas comes 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.
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Lo Handle | Hi Handle |
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