Gree U-Match Series Owner's Manual page 25

Dimensions for the making of oil return bend are as follows:
A(inch)
Ф1/2
Ф5/8
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 cut surface so that the chips do not enter the pipe.
(3) Take out the flare nut from the bag of indoor unit accessories. Then fit the
flare nut on the pipe and use a flaring tool to flare the mouth of connection
pipe.
(4) Check whether the flaring part has cracked (see the figure below).
3.2.3.3 Pipe Bending
(1) The pipes are shaped by your hands. Be careful not to collapse them.
(2) Do not bend the pipes in an angle more than 90°.
U-Match Series Cassette Type Unit
B(mm)
≥26
≥33
21
C(mm)
≤150
≤150