Gree GUD35ZD/A-T Owner's Manual page 27

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
cut surface so that the chips do not enter the pipe.
(3). Remove the cut-off valve of outdoor unit and 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° .
(3). If the pipe is repeatedly bent or extended, it will become hard and difficult to be
bent or extended. So do not bend or extend the pipe for more than 3 times.
DC Inverter U-match Series Floor Ceiling Type Unit
A
In.
1/2
5/8
B(mm)
≥26
≥33
23
C(mm)
≤150
≤150