Refrigerant Piping Connection; Fixing The Outdoor Unit; Detaching The Valve Cover; Tightening Connection - Toshiba RAS-4M27U2AVG-E Service Manual

Fixing the Outdoor Unit

Fix the outdoor unit using attachment bolts.
• Use 8 mm or 10 mm anchor bolts and nuts.
• Do not allow the attachment bolts to protrude by more than 15 mm.
• Install the outdoor unit at ground level.
• Attach the vibration-proof rubber pads under the fi xing legs.
Drain hole
150 600
Drain hole
Drain nipple mounting hole
GOOD
Absorb vibration
with vibration-proof
rubber pads
Mounting leg
Foundation
Bottom plate of
outdoor unit
Foundation
Support the bottom surface of the
mounting leg that is in contact with
and underneath the bottom plate of
the outdoor unit.
Refrigerant piping
CAUTION
Install in rooms that are 13 m
a leak of refrigerant gas occurs inside the
room, an oxygen defi ciency may occur.

Detaching the Valve cover

■
Remove the 5 screws.
• Pull the front panel in the direction of the arrow, and remove it.
Fig. 10-2-6
525
150
15 mm or
less
BAD
Do not support
If only the end
the outdoor unit
of the
only with the
mounting leg
mounting leg.
is supported,
it may
deform.
Foundation
Fig. 10-2-5
or larger. If
3

Refrigerant Piping Connection

■
Flaring
1. Cut the pipe with a pipe cutter.
90°
2. Remove the burr inside of the pipe.
When removing the burr, be careful so that chips do not fall into the pipe.
3. Remove the fl are nuts attached to the outdoor/indoor unit, then insert them
into each of the pipes.
4. Flare the pipes.
See the following table for the projection margin (A) and fl aring size (B).
Die
Pipe
Outside
Thickness
diameter
mm
6.35
9.52
12.7
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 flare nut as far as possible with your fingers. Then
tighten the nut with a spanner and torque wrench as
shown in the figure.
Externally
threaded side
Use a wrench to secure.
CAUTION
• Do not apply excess torque.
•
Otherwise, the nut may crack depending on the
conditions.
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FILE NO. SVM-18052
Roughness
Obliquity
A
Pipe
A B
Rigid Imperial
(clutch (wing
type) nut type)
R32 R32
tool tool
mm mm mm mm
1.5 to
0.8 0 to 0.5 9.1
2.0
1.5 to
0.8 0 to 0.5 13.2
2.0
2.0 to
0.8 0 to 0.5 16.6
2.5
Half union Flare nut
Internally
threaded side
Use a torque wrench to tighten.
Fig. 10-2-7
Warp
B