Gree U-match Série Manuel De L'utilisateur page 27

(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:
Dimensions for the making of oil return bend are as follows:
mm
Ф12
Ф16
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
DC Inverter U-match Series Cassette Type Unit
Outdoor unit
Install an oil return
bend every 6m
B
A
A
in.
1/2
5/8
Non-return bend
System gas pipe
Oil return bend
Indoor unit
C
B(mm)
≥26
≥33
23
C(mm)
≤150
≤150