8.Cutting and Flaring work of piping
Pipe cutting is carried out with a pipe cutter and burs must be
removed.
After inserting the flare nut, flaring work is carried out.
WARNING
3) Use separate thermal insulation pipes for gas and liquid refrigerant
pipe.
It becomes high
midway.
The end is immersed
in water
It waves.
Less than
5cm
It gap with the ground its
too small.
There is the bad
smell from a ditch.
Please pour water in the drain pan of the indoor unit, and confirm that drainage is carried out serely to outdoor.
In case that the attached drain hose is in a room, please apply heat insulation to it without fail.
9. On drainage
Please install the drain hose so as to be downward slope without fail. Please don't do the drainage as shown below.
Correct
Incorrect
Lean Damage of flare Crack
Partial Too outside
1) Do not use mineral oil on flared part.
2) Prevent mineral oil from getting into the system as this would educe the lifetime of the units.
3) Never use piping which has been used for previous installations. Only use parts which are delivered with the unit.
4) Do never install a drier to this R410A unit in order to guarantee its lifetime.
5) The drying material may dissolve and damage the system.
6) Incom;ete flaring may cause refrigerant gas leakage.
Cut exactly at right
angles.
Remove burrs
Flare's inner
surface must be
flaw-free.
The pipe end
must be evenly
flared in a perfect
circle.
Make sure that the
flare nut is fitted.
Check
A
Flare tooling die
Pipe diameter
Size A (mm)
Liquid side
Gas side
6.35mm(1/4")
9.52mm(3/8")
0.8~1.5
1.0~1.5
12.7mm(1/2")
1.0~1.5
Pipe
Be sure to
place a cap.
If no flare cap is
available, cover the
flare mouth with tape
to keep dirt or water
out.
Rain
Wall
Inter unit wiring
Gas pipe
Gas pipe
insulation
Finishing tape
Drain hose
Liquid pipe
insulation
Liquid pipe
A
Flare tooling die
Set exactly at the position shown below.
Flare tool for R410A
Clutch-type
0-0.5mm
Conventional flare tool
Clutch-type(Rigid-type)
1.0-1.5mm
Wing-nuttype(Imperial-type)
1.5-2.0mm
-45-
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