Fujitsu AW?Z24LBC, Service Instruction

Page: 38 / 97

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