Installation Manual
19
19-EN
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
Cut the pipe with a pipe cutter.
Remove burrs completely.
Remaining burrs may cause gas leakage.
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
manufactured 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)
R
R
,'*,'
(Clutch type)
Flaring dia. meter size: A (Unit: mm)
* In case of flaring for R410A with the
conventional flare tool, pull it out
Outer dia. of
copper pipe
R410A tool used
Conventional
tool used
R410A
R410A
6.4 , 9.5
0 to 0.5
1.0 to 1.5
12.7 , 15.9
Outer dia. of copper pipe
R410A
1
.
9
4
.
6
2
.
3
1
5
.
9
6
.
6
1
7
.
2
1
7
.
9
1
9
.
5
1
B
A
0
-0.4
+
A
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.
9
REFRIGERANT PIPING
Refrigerant Piping
Use copper pipe with 0.8
mm or more
thickness.
(In case pipe size is dia. 15.9,
with 1.0
mm or more.)
)ODUHQXWDQGIODUHZRUNVDUHDOVRGLIIHUHQW
from those of the conventional refrigerant.
7DNHRXWWKHIODUHQXWDWWDFKHGWRWKHPDLQ
unit of the air conditioner, and use it.
REQUIREMENT
When the refrigerant pipe is long, provide
support brackets at intervals of 2.5 to 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.: mm)
00.
8
P015 to
8
P018 type
8
P024 type
Gas side
12.7
15.9
Liquid side
6.4
9.5
