Toshiba RAS-B10SKVP-E Service Manual page 66

10-4-5. Refrigerant Piping Connection
CAUTION
KEEP IMPORTANT 4 POINTS FOR PIPING
WORK
1. Keep dust and moisture from entering the
pipes.
2. Tight connection (between pipes and unit)
3. Evacuate the air in the connecting pipes
using VACUUM PUMP .
4. Check gas leak. (connected points)
Flaring
1. Cut the pipe with a pipe cutter.
90˚
Fig. 10-4-2
2. Insert a flare nut into the pipe, and flare the pipe.
As the flaring sizes of R410A differ from those of
refrigerant R22, the flare tools newly manufac-
tured for R410A are recommended.
However, the conventional tools can be used by
adjusting projection margin of the copper pipe.
• Projection margin in flaring :
B (Unit : mm)
Rigid (Clutch type)
R410A tool used
Outer dia. of
copper pipe
R410A
6.35 0 to 0.5 (Same as left)
9.52 0 to 0.5 (Same as left)
12.7 0 to 0.5 (Same as left)
Imperial (Wing nut type)
Outer dia. of copper pipe
6.35
9.52
12.7
Obliquity Roughness
Fig. 10-4-3
Conventional tool used
R22 R410A R22
1.0 to 1.5 0.5 to 1.0
1.0 to 1.5 0.5 to 1.0
1.0 to 1.5 0.5 to 1.0
R410A R22
1.5 to 2.0 1.0 to 1.5
1.5 to 2.0 1.0 to 1.5
2.0 to 2.5 1.5 to 2.0
• Flaring size : A (Unit : mm)
Outer dia. of copper pipe
6.35
9.52
12.7
* In the case of flaring for R410A with the conven-
tional flare tool, pull out it approx. 0.5 mm more
than that for R22 to adjust to the specified flare
size. The copper pipe gauge is useful for adjust-
ing projection margin size.
10-4-6. Installation
NOTE : For installation, at least 3 dimensions
should be kept free from obstacles (walls).
Warp
80 mm or more only when unobstructed
to the front and both sides
100 mm or more
from wall
(C)
(B)
200 mm
or more
B
When installing the outdoor unit,
leave open in at least two of
directions (A), (B), (C) and (D)
shown in the right figure.
Fixing bolt arrangement of outdoor unit
Elongated
( 11 )
drain hole
Fig. 10-4-6
• Secure the outdoor unit with the fixing bolts
and nuts if the unit is likely to be exposed to a
strong wind.
• Use Ø8 mm or Ø10 mm anchor bolts and nuts.
– 66 –
A
Fig. 10-4-4
+0
A
- 0.4
R410A
9.1
13.2
16.6
50 mm or more
from wall
In principle,
leave open
(D)
250 mm or more
from wall
(A)
As shown in the figure, hang power cord
and connecting cable downward, and
take out it along piping connection port.
Fig. 10-4-5
600
Suction side
115 125 50
30
Diffuser Drain hole
( 10 )
R22
9.0
13.0
16.2