DC Inverter Multi VRF System User Manual
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Within ±30°
Cut in the middle
Within ±30°
o
Fig.18
4.4.7 Thermal Insulation for Pipeline
1) For multi VRF system, every copper pipe should be labeled so as to avoid misconnection.
2) At the branch inlet, leave at least 500mm straight pipe section.
3) Thermal insulation for pipeline.
①
To avoid condensate or water leakage on the connection pipe, the gas pipe and liquid pipe
must be wrapped with thermal insulating material and adhesive tape for insulation from the air.
②
Thermal insulating material shall be able bear the pipe temperature. For heat pump unit, liquid
pipe should bear 70
℃
or above and gas pipe should bear 120
℃
or above. For cooling only
unit, both liquid pipe and gas pipe should bear 70
℃
or above.
Example: Polyethylene foam (bear 120
℃
or above); foaming polyethylene (bear 100
℃
or above).
③
Joints of indoor and outdoor unit should be wrapped with insulating material and leave no gap
between pipe and wall. See Fig.19.
Thermal insulating layer is required to be wrapped at this part.
Thermal insulating pipe
No gap
Fig.19
④
Thermal insulating material of branches should be the same as that of the pipeline. The
attached foam of branches cannot be taken as insulating material.
⑤
When wrapping the tape, the later circle should cover half of the former one. Don’t wrap the
rape too tight, otherwise the insulation effect will be weakened.
⑥
After wrapping the pipe, apply sealing material to completely seal the hole on the wall.
4.4.8 Support and Protection of Pipeline
1) Support should be made for hanging connection pipe. Distance between each support cannot
be over 1m.
2) Protection against accidental damage should be made for outdoor pipeline. When pipeline
exceeds 1m, a pinch board should be added for protection.
