DC Inverter U-match Series Floor Ceiling Type Unit
26
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:
Outdoor unit
Indoor unit
System gas pipe
Oil return bend
Install an oil return
bend every 6m
(2) Outdoor unit is above the indoor unit.
It’s necessary to add oil return bend and non-return bend at the
lowest and highest position of the vertical pipe, as shown below:
Outdoor
Outdoor unit
unit
Non-return
Non-return bend
bend
System
System gas
gas pipe
pipe
Oil
Oil return
return bend
bend
Indoor
Indoor unit
unit
Install
Install an
an oil
oil return
return
bend
bend every
every 6m
6m
