Toshiba RAS-B10GKVP-E - Page 81

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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.
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)
Fig. 10-4-3
Imperial (Wing nut type)
Outer dia. of
copper pipe
6.35
9.52
12.7
R410A tool used
R410A R22
0 to 0.5 (Same as left)
0 to 0.5 (Same as left)
0 to 0.5 (Same as left)
Conventional tool used
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
Outer dia. of copper pipe
6.35
9.52
12.7
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)
Fig. 10-4-4
Outer dia. of copper pipe
6.35
9.52
12.7
A
R410A R22
9.1 9.0
13.2 13.0
16.6 16.2
+0
- 0.4
* 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 adjusting
projection margin size.
10-4-6. Installation
NOTE : For installation, at least 3 dimensions should
be kept free from obstacles (walls).
Fig. 10-4-5
Fixing bolt arrangement of outdoor unit
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.
90˚
Obliquity Roughness Warp
B
A
As shown in the figure, hang power cord
and connecting cable downward, and
take out it along piping connection port.
100mm or more
from wall
600mm or more
600mm or more
from wall
100mm or
more from wall
600mm or more
600
365
Suction side
Diffuser