York YHKMXH009BARR-FX Service Manual page 46

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3) Use separate thermal insulation pipes for gas and liquid refrigerant
pipe.
Inter unit wiring
Gas pipe
Gas pipe
insulation
Finishing tape
Check
Flare's inner
surface must be
flaw-free.
Make sure that the
flare nut is fitted.
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.
Pipe
A
Liquid side
Flare tooling die
Gas side
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.
It becomes high
midway.
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.
WARNING
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.
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Liquid pipe
Liquid pipe
insulation
Drain hose
The pipe end
must be evenly
flared in a perfect
circle.
Set exactly at the position shown below.
A
Flare tooling die
Pipe diameter
Size A (mm)
6.35mm(1/4")
0.8~1.5
9.52mm(3/8")
1.0~1.5
12.7mm(1/2")
1.0~1.5
The end is immersed
in water
It waves.
Rain
If no flare cap is
available, cover the
flare mouth with tape
to keep dirt or water
out.
Cut exactly at right
angles.
Flare tool for R410A
Conventional flare tool
Clutch-type
Clutch-type(Rigid-type)
0-0.5mm
1.0-1.5mm
Correct
Lean Damage of flare Crack
Less than
5cm
It gap with the ground its
too small.
-45-
Wall
Be sure to
place a cap.
Remove burrs
Wing-nuttype(Imperial-type)
1.5-2.0mm
Incorrect
Partial
Too outside
There is the bad
smell from a ditch.

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