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Installation instructions
When installing pipe through
the wall, secure a cap at the
end of the pipe.
Incorrect
Correct
Hole
Hole
Attach a cap
or vinyl tape.
3.Refrigerant piping work
(1)
Pipe cutting
Cut the cooper pipe correctly with pipe cutter.
(2) Burrs removal
Completely remove all burrs from the cut cross section of the pipe.
Orient the end of the copper pipe downward to prevent burrs from dropping in the pipe.
4. Piping connection
(1) Confirm that the valves are closed.
(2) Connect the indoor unit and the outdoor unit with field-supplied
refrigerant pipes. The refrigerant piping should be brazed with a
phosphorous-copper alloy material such as Silfos-5 or equivalent.
Precautions and steps during brazing service valve:
a. Remove the caps from both the liquid and gas service valve
service ports at the outdoor unit
b. Braze the liquid piping and gas piping tothe respective valve at
the outdoor unit.
Prior to brazing, wrap a wet cloth around each service valve to
prevent heat damage while brazing.
A baffle can be used to protect painted surfaces and insulation
during while brazing.
c. Cool joints and other heat sensitive components with a wet rag
during brazing.
(3) After connecting the refrigerant pipes, insulate the pipes according
to local codes and temperature/humidity conditions. See also
detailed figure.
·For outdoor unit side, insulate all piping including valves.
·Cover piping joints with pipe cover.
·Using piping tape, apply taping starting from the entry of outdoor unit.
- Secure the end of the piping tape with adhesive tape.
- When piping has to be routed above ceiling, closet or area where
temperature and humidity are high, apply additional insulation
for prevention of condensation.
5. Air tight test
·Use Nitrogen.
Using charging hose, connect the gauge manifold at the nitrogen
cylinder to the check joints of the liquid line and the gas line stop
valves.
Perform the air
tight test
-
Don
t open the gas line stop valves
'
Apply nitrogen gas pressure of 550 psig (3.8 MPa
Check for any gas leak
parts utilizing gas leak detector or foaming agent
In addition, observe the gas pressure during the leak test to
make sure that it does not decrease.
After the air tight test
,
C A U T I O N
！
危
险
Do not place the pipe
Correct
directly on the ground.
Correct
Incorrect
Attach a cap
or vinyl tape.
.
.
.
at the flare nut connections
s
release nitrogen gas.
Incorrect
Rain water can
enter.
Attach a cap
or vinyl bag with
rubber band.
Procedure
Completion
).
or brazed
,
.
7
baffle
Clamp(field-supplied) Insulation (field-supplied)
Piping insulation procedure
Applying
of Ref.
Nitrogen
Piping
Gas
Repairing
of Leakage
Part
Air tight procedure
welding torch
wet cloth
Refrigerant pipe
(field-supplied)
Insulation
(
field-supplied
)
Check of
Pressure
Pass
Decrease
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