Gree KM48H4O Service Manual page 61

Thermal insulation
Installation of outdoor unit
Connection of indoor unit and outdoor unit
Leakage detection under pressure
Vacuuming
Add refrigerant
Open the valve of outdoor unit
Commissioning of complete unit
Remarks:
a. Described above are general working procedures. The procedures might vary with the site conditions.
b. For detailed installation rules, please see the description in each chapter
acceptable if pressure drop is within 0.02MPa. (With the
temperature change by 1 , the pressure will change by
approx. 0.01MPa)
◆ The thermal insulation tube must meet the specifications.
◆ Seal between the thermal insulation pipes to avoid air entry.
◆ Select the installing position correctly.
◆ Build the foundation according to the anchor bolt position and
the dimension of outdoor unit
◆ Build the damping device properly.
◆ Avoid sharp knock when handling the outdoor unit. The
inclination angle shall not be higher than 15°.
◆ Tighten the nuts.
◆ Provide proper protection to the outdoor connection pipe,
communication wires and power supply.
◆ Keep the pressure for 24 hours. Except for the influence by
temperature, it is deemed acceptable if pressure drop is within
0.02MPa. (With the temperature change by 1℃, the pressure
will change by approx. 0.01MPa).
◆ Establish vacuum simultaneously in the gas pipe and liquid
pipe;
◆ The vacuuming time shall be long enough.
◆ Put still for 1 hour after vacuuming. It is deemed acceptable if
the pressure will not rise.
◆ Add refrigerant according to the volume as specified on the
engineering drawing.
Super Free Match
Service Manual
℃
55
INSTALLATION