– 73 –
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 w
all
600mm or more
600mm or more
from w
all
100mm or
more from w
all
600mm or more
40
42.5
365
50
50
259
600
280
Outlet
Elongated
drain hole
Drain
hole
Inlet
10
11
Summary of Contents for RAS-4M23SACV-E
Page 27: ... 27 4 2 Outdoor Unit RAS 4M23SAV E RAS 4M23SACV E ...
Page 114: ... 114 MCC 1438 ...
Page 115: ... 115 MCC 818 ...
