Gree GMV5 Series Service Manual page 214

5. Install a new
electric expansion
valve.
6. Fix and wire the
electric box.
7. Check and install
the front panels.
Precondition: No refrigerant exists in the pipeline system and the power supply has been disconnected.
Step
GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
Diagram
Oil separator
211
● Weld the connecting pipes with
the electric expansion valve.
● Before welding, cover the valve
with wet cloth.
●During welding, charge
nitrogen into the pipes. The
pressure should be controlled
within 0.5± 0.1 kgf/cm2 (relative
pressure).
Note: Avoid nearby parts from
being burnt during welding.
● Install the coil on the electric
expansion valve.
●Put the electric box back to
original position and screw it.
● Connect all lines.
●Check various parts and
connecting lines.
● If no problem is found, hook
the front panels and tighten the
screws.
Operation Procedure