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Photovoltaic Multi VRF
Branch shall be isolated by insulating material that can bear 120℃(248℉)or even higher temperature. The attached
foam of branch cannot be taken as insulating material.
4.3.6 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(19-3/4inch) 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)
Joints of indoor and outdoor unit should be wrapped with insulating material and leave no
gap between pipe and wall. See Fig. 4.3.6.
3)
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.
4)
After wrapping the pipe, apply sealing material to completely seal the hole on the wall.
(1)
Thermal insulating material shall be able to bear the pipe temperature. For heat pump unit, liquid pipe should
bear 70℃(158℉) or above and gas pipe should bear 120℃(248℉) or above. For cooling only unit, both liquid
pipe and gas pipe should bear 70℃(158℉) or above.
(2)
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.
4.3.7 Support and Protection of Pipeline
(1)
Support should be made for hanging connection pipe. Distance between each support cannot be over
1m(3-1/4feet).
(2)
Protection against accidental damage should be made for outdoor pipeline. When pipeline exceeds
1m(3-1/4feet), a pinch board should be added for protection.
4.4 Disassembly of Compressor Feet
In order to prevent unit from damage during transportation, 2 metal pieces are fitted to outdoor
unit's compressor feet before unit leaves factory. See Fig. 4.4.
Fig. 4.3.6
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