Draining The Water; Refrigerant Piping Connection - Toshiba RAS-25S4KVPG-ND Installation Manual

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 effi ciently.
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-proofi 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.)
Drain nipple
2. Install the drain nipple and a commercially available drain hose
(32 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
Ø32
Ø32
Commercially available drain hose
Do not use ordinary garden hose, but one can fl atten and prevent water
from draining.
Water-proof rubber caps
(supplied with the outdoor unit)
Base plate
Ø32
or

Refrigerant Piping Connection

Flaring
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)
Outer dia.
of copper pipe
Ø6.35
Ø9.52
Ø12.70
Pipes thickness
A
Die
Pipe
CAUTION
• Do not scratch the inner surface of the fl ared part when removing burrs.
• Flare processing under the condition of scratches on the inner surface
of fl are processing part will cause refrigerant gas leak.
Tightening connection
Align the centers of the connecting pipes and tighten the fl are nut as far as
possible with your fi ngers. Then tighten the nut with a spanner and torque
wrench as shown in the fi gure.
Externally
90º
threaded side
C L
Use a wrench to secure.
CAUTION
Do not apply excess torque. Otherwise, the nut may crack depending on
the conditions.
Outer dia. of copper pipe
Ø6.35 mm
Ø9.52 mm
Ø12.70 mm
• Tightening torque of fl are pipe connections
The operating pressure of R32 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 specifi ed tightening torque.
Incorrect connections may cause not only
a gas leakage, but also damage to the
refrigeration cycle.
12
Obliquity
90
R32 tool used
0 to 0.5
0 to 0.5
0 to 0.5
0.8 mm or more
IMPERIAL (wing nut type)
Outer dia. of copper pipe
Ø6.35
Ø9.52
Ø12.70
Pipes thickness
Half union Flare nut
Use a torque wrench to tighten.
Tightening torque
16 to 18 (1.6 to 1.8 kgf·m)
30 to 42 (3.0 to 4.2 kgf·m)
50 to 62 (5.0 to 6.2 kgf·m)
Roughness Warp
Conventional tool
used
1.0 to 1.5
1.0 to 1.5
1.0 to 1.5
R32
1.5 to 2.0
1.5 to 2.0
2.0 to 2.5
0.8 mm or more
Internally
threaded side
(Unit : N·m)
Flare at
indoor unit side
Flare at
outdoor unit side