Installation Manual
‒
22
‒
22-EN
EN
FR
ES
9
REFRIGERANT PIPING
Refrigerant Piping
Flare nut and
fl
are works are also different
from those of the conventional refrigerant.
Take out the
fl
are nut attached to the main
unit of the air conditioner, and use it.
REQUIREMENT
When the refrigerant pipe is long, provide
support brackets at intervals of 8
′
2
″
- 9
′
9
″
(2.5 - 3 m) to clamp the refrigerant pipe.
Otherwise, abnormal sound may be generated
CAUTION
IMPORTANT 4 POINTS FOR PIPING WORK
1. Remove dust and moisture from the inside
of the connecting pipes.
2. Tight connection (between pipes and unit)
3. Evacuate the air in the connecting pipes
using VACUUM PUMP.
4. Check the gas leakage. (Connected points)
Pipe size
(dia.: in (mm))
Model
SM122 to
SM182 Type
SM242 Type
Gas side
1/2
″
(12.7)
5/8
″
(15.9)
Liquid side
1/4
″
(6.4)
3/8
″
(9.5)
Permissible Piping Length and
Height Difference
They vary according to the outdoor unit.
For details, refer to the Installation Manual
attached to the outdoor unit.
Flaring
෬
Cut the pipe with a pipe cutter.
Remove burrs completely.
Remaining burrs may cause gas leakage.
෬
Insert a
fl
are nut into the pipe, and
fl
are the pipe.
As
the
fl
aring sizes of R410A differ from
those of refrigerant R22, the
fl
are tools newly
manufactured for R410A are recommended.
However,
the
conventional tools can
be used by adjusting
projection margin of the
copper pipe.
q
Projection margin in flaring: B (Unit: in (mm))
RIDGID
(Clutch type)
Outer dia. of
copper pipe
R410A tool used
Conventional
tool used
R410A
R410A
1/4
″
(6.4) ,
3/8
″
(9.5)
0 - 0.02
″
(0 - 0.5)
0.04
″
- 0.06
″
(1.0 - 1.5)
1/2
″
(12.7) ,
5/8
″
(15.9)
q
Flaring dia. meter size: A (Unit: in (mm))
Outer dia. of copper pipe
A
+0
-0.4
R410A
1/4
″
(6.4)
0.36
″
(9.1)
3/8
″
(9.5)
0.52
″
(13.2)
1/2
″
(12.7)
0.66
″
(16.6)
5/8
″
(15.9)
0.78
″
(19.7)
* In case of
fl
aring for R410A with
the conventional
fl
are tool, pull it
out approx. 0.02
″
(0.5 mm) more
than that for R22 to adjust to the
speci
fi
ed
fl
are size. The copper
pipe gauge is useful for adjusting
projection margin size.
A
B
01_1121250414-EN.indd 22
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14/1/2565 BE 16:50
14/1/2565 BE 16:50