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DC Inverter U-match Series Duct Type Unit
21
Connection pipe should adopt water-proof insulating material. Its
wall thickness should be 0.5-1.0mm and the pipe wall should be able to
withstand 6.0MPa. The longer the connection pipe is the worse cooling
and heating performance it has.
When the drop between indoor and outdoor units is larger than
10m, an oil return bend should be added every 6 meters.
The requirement on the adding of oil return bend is as below:
(1) Outdoor unit is beneath the indoor unit.
There’s no need to add non-return bend at the lowest or highest
position of the vertical pipe, as shown below:
Indoor unit
System gas pipe
Oil return bend
Install an oil return
bend every 6m
Outdoor unit
Summary of Contents for DC Inverter U-match Series
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