Gree GMV5 Compact Series - Page 23

GMV5 Compact Series VRF Outdoor Unit
18
Fig.15 The way of connecting pipe
Number
1
2
3
4
5
Name
Outdoor unit
Booster valve
Nitrogen
Gas valve
Liquid valve
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.
Fig.16 Vacuum
Number
1
2
3
4
5
6
7
Name
ODU
Gas valve
Liquid valve
Manometer
“LO” Knob
“HI” Knob
Vacuum pump
(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.