2) Refrigerant piping heat Insulation
Do the heat insulation to the pipes of gas side and liquid side separately. The temperature of
the pipes of gas side and liquid side when cooling, for avoiding condensation please do the
heat insulation fully.
1) The gas side pipe should use closed cell foamed insulation material, which the fire-retardant
is B1 grade and the heat resistance over 120℃.
2) When the external diameter of copper pipe≤Φ12.7mm, the thickness of the insulating layer
at least more than 15mm;
When the external diameter of copper pipe≥Φ15.9mm, the thickness of the insulating layer at
least more than 20mm.
3) Please use attached heat-insulating materials do the heat insulation without clearance for
the connecting parts of the indoor unit pipes.
3) Refrigerant piping connection
We should wash the pipes with high pressure nitrogen, never use refrigerant of the outdoor
units. Make sure there is no dirt or water in the pipes before connecting the pipes to the
outdoor units.
Caution:
● Please pay attention to avoid the components where it is connecting to the connecting
pipes.
● To prevent the refrigerant piping from oxidizing inside when welding, it is necessary to
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