10
Draining the Water
90
Obliquity
Roughness
Warp
Refrigerant Piping Connection
1. Cut the pipe with a pipe cutter.
2. Insert a
fl
are nut into the pipe and
fl
are the pipe.
•
Projection margin in
fl
aring : A (Unit : mm)
RIDGID
(clutch type)
IMPERIAL
(wing nut type)
Outer dia. of copper pipe
Tool used
Ø6.35
1.5 to 2.0
Ø9.52
1.5 to 2.0
Ø12.70
2.0 to 2.5
Pipes thickness
0.8 mm or more
Outer dia.
of copper pipe
Tool used
Conventional tool
used
Ø6.35
0 to 0.5
1.0 to 1.5
Ø9.52
0 to 0.5
1.0 to 1.5
Ø12.70
0 to 0.5
1.0 to 1.5
Pipes thickness
0.8 mm or more
Flaring
A
Die
Pipe
• Do not scratch the inner surface of the fared part when removing burrs.
• Flare processing under the condition of scratches on the inner surface of
fare processing part will cause refrigerant gas leak.
CAUTION
y
Holes are provided on the base plate of the outdoor unit to ensure that the
defrost water produced during heating operations is drained off ef
fi
cient.
If a centralized drain is required when installing the unit on a balcony or
wall, follow the steps below to drain off the water.
1. Proceed with water-proo
fi
ng by installing the water-proof rubber caps
in the 2 elongated holes on the base plate of the outdoor unit. [How to
install the water-proof rubber caps]
1) Place four
fi
ngers into each cap, and insert the caps into the water
drain holes by pushing them into place from the underside of the base
plate.
2) Press down on the outer circumferences of the caps to ensure that
they have been inserted tightly.
(Water leaks may result if the caps have not been inserted properly, if
their outer circumferences lift up or the caps catch on or wedge against
something.)
Water-proof rubber caps
(supplied with the outdoor unit)
Base plate
Drain nipple
2. Install the drain nipple and a commercially available drain hose
(with 16 mm inside diameter), and drain off the water.
(For the position where the drain nipple is installed, refer to the
installation diagram of the indoor and outdoor units.)
• Check that the outdoor unit is horizontal, and route the drain hose at a
downward sloped angle while ensuring that it is connected tautly.
Base plate
Drain nipple
Commercially available
drain hose
Do not use ordinary garden hose, but one can
fl
atten and prevent water
from draining.
Flare nut
Half union
Externally
threaded side
Internally
threaded side
Use a wrench to secure.
Use a torque wrench to tighten.
CAUTION
Align the centers of the connecting pipes and tighten the
fl
are nut as far as pos-
sible with your
fi
ngers. Then tighten the nut with a spanner and torque wrench
as shown in the
fi
gure.
Tightening connection
Do not apply excess torque. Otherwise, the nut may crack depending on
the conditions.
(Unit : N·m)
Outer dia. of copper pipe
Tightening torque
Ø6.35 mm
16 to 18 (1.6 to 1.8 kgf·m)
Ø9.52 mm
30 to 42 (3.0 to 4.2 kgf·m)
Ø12.70 mm
50 to 62 (5.0 to 6.2 kgf·m)
Flare at
indoor unit side
Flare at
outdoor unit side
•
Tightening torque of
fl
are pipe connections
The operating pressure of R32 or
R410A is higher than that of R22
(approx. 1.6 times). It is therefore
necessary to
fi
rmly tighten the
fl
are
pipe connecting sections (which
connect the indoor and outdoor units)
up to the speci
fi
ed tightening torque.
Incorrect connections may cause not
only a gas leakage, but also damage
to the refrigeration cycle.
Summary of Contents for RAS-18J2AVRG-E
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