Gree GMV-ND224PH/A-T Manuel D'utilisateur page 23

Number
Name
4.5.2 Vacuum
(1) Conform outdoor unit liquid valve and gas valve are closed when deflating air.
(2) Follow the instruction to deflate air of unit with vacuum pump.
Number 1
Name ODU
(3) Turn on vacuum pump, "LO" knob and "HI" knob to vacuum the air of both gas pipe and liquid pipe. If only
one pipe is deflated, the units exist air leading to a little vacuum degree.
(4) When manometers show -0.1MPa(-1bar), vacuum pump still works for 1hour or more to make sure that indoor
unit and connecting pipes don't exist air.
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GMV5 Compact Series VRF Outdoor Unit
Fig.15 The way of connecting pipe
1 2
Outdoor unit Booster valve
2 3
Gas valve Liquid valve
3
Nitrogen
Fig.16 Vacuum
4 5
Manometer "LO" Knob
18
4 5
Gas valve Liquid valve
6 7
"HI" Knob Vacuum pump