Toshiba RAS-B10J2FVG-E Service Manual page 78

Draining the Water
Holes are provided on the base plate of the
•
outdoor unit to ensure that the defrost water
produced during heating operations is drained
off efficiently. 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-proofing 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 fingers 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.)
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
Do not use ordinary garden hose, but one can
flatten and prevent water from draining.
Water-proof rubber caps
(supplied with the outdoor unit)
Base plate
Commercially available
drain hose
10-4-3. Refrigerant piping connection <Flaring>
1. Cut the pipe with a pipe cutter.
2. Deburr the inside of the pipe at its end.
Take steps to ensure that the removed burrs will not
enter the pipe.
3. Remove the flare nuts provided with the indoor and
outdoor units, and insert them into the pipe.
4.Flare the pipe.
The projection margin of the pipe must be checked.
5.Check that the flare has the appropriate shape.
°
90
A
Die
Pipe
Pipe
RIDGID
Outside
Thickness (clutch type)
diameter
R32 tool
mm mm
6.35 0.8 0 to 0.5
9.52 0.8 0 to 0.5
12.7 0.8 0 to 0.5
CAUTION
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.
Tightening torque for connection of flare pipe
●
The pressure of R32 or R410A is higher than R22
(Approx. 1.6 times). Therefore securely tighten the flare
pipes which connect the outdoor unit and the indoor unit
with the specified tightening torque using a torque
wrench. If any flare pipe is incorrectly connected, it may
cause not only a gas leakage but also trouble in the
refrigeration cycle.
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Obliquity Roughness
Fig. 10-4-3
B
Fig. 10-4-4
A B
IMPERIAL
(wing nut
C
type)
R32 tool
mm mm mm mm
1.5 to 2.0 9.1 17
1.5 to 2.0 13.2 22
2.0 to 2.5 16.6 26
Flare at
indoor unit side
Fig. 10-4-5
Flare at
outdoor unit side
Warp
C
Flare Nut
Tighten torque
N m kgf m
• •
14 to 18 1.4 to 1.8
33 to 42 3.3 to 4.2
50 to 62 5.0 to 6.2