Gree GMV-450WM/B-X - Page 212

GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
209
5. Install a new
four-way valve.
●Put the valve in a proper
position.
●
Weld the valve with the
pipeline.
●Before welding, cover the valve
with wet cloth to avoid internal
slide from being burnt and
prevent water from flowing in the
pipeline.
●During welding, charge
nitrogen into the pipes. The
pressure should be controlled
within 0.5±0.1 kgf/cm2 (relative
pressure).
6. Fix and wire the
electric box.
●Put the electric box back to
original position and screw it.
●
Connect all lines.
7. Check and install
the front panels.
●Check various parts and
connecting lines.
●
If no problem is found, hook
the front panels and tighten the
screws.