DC Inverter Side Discharge VRF Ⅱ for North America
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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.
6.1.5 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. 20.
Fig. 20
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 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.
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