Installation Guide
3
R32
R32
R32
R32
R32
R32
R32
18
Read Before Installation
Piping Materials
Types
of
Copper Pipes (Reference)
Maximum Operation Pressure Applicable Refrigerants
3.4MPa
R22,R407C
4. MPa
• Use pipes that meet the local standards.
Piping Materials/Radial Thickness
Use pipes made
of
phosphorus deoxidized copper.
Since the operation pressure
of
the units that use is
hig_her
than that
of
the units for use with R22, use pipes with
at least the radial thickness specified
in
the chart below. (Pipes with a radial thickness
of
0.7mm
or
less may not be used.)
Size(mm) Size(inch) Radial Thickness(mm)
Type
cp6.35 1/4" 0.8t
cp9.52 3/8" 0.8t
Type-O pipes
cp
12.7 1/2" 0.8t
C/)
15.88
5/8" 1.0t
C/)
19.05 3/4" 1.0t Type-1/2H
or
Hpipes
• Although it was possible to use type-O for pipes with a size
of
up
to
c/)
19.05(3/4") with conventional refrigerants, use type-
1 /2H pipes for units that use .(Type-O pipes may be used if the pipe size
is
c/)19.05
and the radial thickness is 1.2t.)
• The table shows the standards
in
Japan. Using this table as a reference, choose pipes that meet the local standards.
Flare Machining (type-O and OL only)
The flare machining dimensions for units that use
air tightness.
Flare Machining Dimension(mm)
External dimension
of
pipes
Size
Dimension A
<P6.35
1/4"
9.1
<P9.52
3/8" 13.2
<P12.7
1/2"
16.6
<P15.88
5/8" 19.7
<P19.05
3/4" 24.0
is larger than those for units that use R22
in
order to increase
R22
9.0
13.0
16.2
19.4
23.3
If a clutch type flare tool is used to machine flares
on
units that use , make the protruding part
of
the pipe between
1.0 and 1.5mm. Copper pipe gauge for adjusting the length
of
pipe protrusion is useful.
Flare Nut
Type-2 flare nuts instead
of
type-1 nuts are used to increase the strength. The size of some
of
the flare nuts have also
been changed.
Flare nut dimension(mm)
External dimension
of
pipes Size
Dimension B
(Type2) R22(Type1)
<P6.35
1/4" 17.0 17.0
<P9.52
3/8"
22.0
22.0
<P12.7
1/2" 26.0 24.0
ED~
<P15.88
5/8"
29.0 27.0
Dimension B
<P19.05
3/4" 36.0 36.0
• The table shows the standards
in
Japan. Using this table as a reference, choose pipes that meet the local standards.