Johnson JR8 Serie Guide D'utilisation page 108

The connection method of the rightward
outlet pipe.
S-shaped pipe
connection(Liqui
d side)
Liquid side
S-shaped pipe
piping（field
connection(Gas
piping）
side)
The connection method of the downward
outlet pipe.
Liquid side piping
（field piping）
The recommended
length is about 400mm.
S-shaped pipe
connection(Liquid
side)
The connection method of the backward
outlet pipe.
S-shaped pipe
connection(Liquid
The backward outlet
side)
pipe should pass
through the gas-liquid
S-shaped pipe
separator
connection
(Gas side)
Gas side piping
（field piping）
5.4.5 Connecting VRF piping assembly
CAUTION
The wrong installation will cause the unit to
malfunction.
5.4.5.1 U-type branch joint
The branch joints should be as level as possible, and the
angular error does not exceed 10°.
U type branch joint
A-direction view
Error
Level
Gas side piping
（field piping）
Fig. 5.23
Gas side piping
（field piping）
The recommended
length is about 400mm.
S-shaped pipe
connection(Gas
side)
Fig. 5.24
Liquid side
piping（field
piping）
Fig. 5.25
A
Correct
10°
10°
Fig. 5.26
29
The branch joints come in different pipe diameters, which
can be easily matched with different pipe diameters.
When connecting pipes, select the pipe section with the
appropriate pipe diameter, cut it in the middle with a pipe
cutter and remove burrs, as shown in the figure below.
Middle of the pipe section
Use special pipe cutter
The length of the straight pipe section between the
contiguous branch pipes shall be no less than 500mm.
The straight pipe section behind the branch pipe end
shall be no less than 500mm. The length of straight pipe
between two right angle bends shall be no less than
500mm.
≥500mm
≥500mm
≥500mm
≥500mm
5.4.5.2 Branch header
NOTE
The content in this section is only for attention
during the installation of branch header.
Please refer to the installation manual of
branch header for detailed selection and
installation requirements.
Only parallel installation is allowed, but not serial
installation for two branch headers.
√ Correct
× Incorrect
Fig. 5.27
Fig. 5.28
Fig. 5.29
Fig. 5.30
V.1