DC Inverter U-match Series Cassette Type Unit
23
(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 unit
Non-return bend
System gas pipe
Oil return bend
Indoor unit
Install an oil return
bend every 6m
Dimensions for the making of oil return bend are as follows:
C
B
A
A
B(mm)
C(mm)
mm
in.
Ф12
1/2
≥
26
≤
150
Ф16
5/8
≥
33
≤
150
3.2.3.2 Pipe Flaring
(1) Cut the connection pipe with a pipe cutter.
(2) The mouth of connection pipe should face downward. Remove burrs with the
