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2. PRECAUTION FOR INSTALLATION
Precaution for installation
Pipe diameter, recommended material and wall thickness
Nominal diameter
(in)
Outside diameter
(mm)
Material
Wall thickness
(mm)
1) Allowable tensile stress
Flare and flare nuts
"
Diameter
1/4
(6.35mm)
R410A
Refrigerant
9.1
A
B
13
12
C
Nut width
Do not use existing (for R22) pipes
•
Be sure to use new pipes when replacing
conventional (R22) model with HFC
(R407C, R410A)
•
If you use existing pipes, it may cause
resolution of compressor oil by remaining
mineral oil.
1/4"
3/8"
1/2"
6.35
9.52
12.70 15.88 19.05 22.22
COPPER
JIS H3300-C1220T-O or equivalent
3)
0.8
0.8
0.8
>
2
2) Allowable tensile stress
33 (N/mm );
=
The pipe must be properly pressure rated for R410A
The pipe must be an air-conditioning refrigerant pipe.
"
3/8
(9.52mm)
R22
R22
R410A
/R407C
/R407C
9.0
13.2
13.0
12
20
15
11
16
12.5
17
22
A
C
model.
5/8"
3/4"
7/8"
1"
25.40
1)
JIS H3300-C1220T-H or equivalent
1.0
1.2
1.0
1.0
>
2
61 (N/mm ); 3) Design pressure 4.2MPa.
=
"
"
1/2
(12.7mm)
3/8
(15.88mm)
R22
R410A
R410A
/R407C
16.6
16.2
19.7
13
20
25
19
16
22
26
24
29
Always use the flare nut that is packed
with the product.
B
06-02
1 1/8" 1 1/4"
1 3/8"
28.58 31.75
34.92
COPPER
1.0
1.1
1.2
"
3/4
(19.05mm)
R22
R22
R410A
/R407C
/R407C
24
23.7
19.4
29
29
23
20
24
24
27
36
1 1/2"
38.10
2)
1.3
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