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CAUTION
Be careful when the pipeline passes through
the wall. Please cover both ends of the
pipeline with adhesive tape or rubber plug to
prevent foreign matters.
The pipe connection shall follow the following
principles: the shorter the connected pipe,
the smaller the height difference between
indoor and outdoor units, the less the pipe
bending angle, and the larger the bending
radius as much as possible.
When laying according to the predetermined
route, the pipe shall not be flattened. The
bending radius of the bending part must be
greater than 200mm. The connecting pipe
cannot be stretched or bent frequently. One
pipe cannot be bent at the same place for
more than 3 times at most.
Before the refrigerant piping is connected, make sure
the indoor units and outdoor units are installed
properly. Connecting refrigerant piping include:
● Connect refrigerant piping to outdoor unit
● Connect refrigerant piping to indoor unit (refer to the
installation manual of the indoor unit)
● Connecting VRF piping assembly
● Assembly for connecting refrigerant piping branch
joint .
CAUTION
Remove the valve cover and make sure that
●
the shut-off valve is fully closed.
Connect a vacuum gauge to the needle valve
●
port and make sure there is no residual
pressure in the tube.
Use pliers and other tools to completely cut
●
off the small sealing tube, and again confirm
that there is no residual pressure in the tube.
Remove the large sealing tube.
●
Service needle valve
OPEN
Gas side stop valve
Small sealing tube
5.4.3 Outdoor refrigerant connecting pipe
position
The outdoor refrigerant
connecting pipe position
is shown in the following
figure.
valve cover
CLOSE
Large sealing tube
Cutting tool
8-22HP
Fig. 5.19
28
5.4.4 Connecting refrigerant piping to
outdoor unit
NOTE
Note the precautions when connecting the
field piping for the refrigerant. Add brazing
material.
Use the attached piping fittings when working
on the pipeline engineering on site.
After installation, make sure the piping does
not come in contact with each other, or the
chassis.
The fittings provided as accessories can be used to
complete the connection from the stop valve to the field
piping.
Field piping can be connected in 4 directions. Before
connecting, knock off the plate in the corresponding
direction.
right-front panel
screws
backward
rightward
screws
forward
downward
right-rear panel right-front panel
chassis assembly
front knock-down panel
rear knock-down
panel
under knock-down panel
The connection method of the forward outlet pipe
S-shaped pipe
connection
(Liquid side)
Gas side piping
（field piping）
Liquid side piping
S-shaped pipe
（field piping）
connection(Gas side)
right-rear panel
Fig. 5.20
Fig. 5.21
Fig. 5.22
V.1
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