Refrigerant Piping; Piping Connection - Hitachi RPF-1.0FSNE Manuel D'installation

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REFRIGERANT PIPING

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3. REFRIGERANT PIPING

3.1. PIPING CONNECTION

3.1.1. PIPING POSITION
3.1.2. SIZE OF PIPING CONNECTION
In case of R407C / R410A
Model RPF(I) 1.0 / 1.5
∅12.70 (5/8)
Gas Piping
∅ 6.35 (1/4)
Liquid Piping
∅ 18,5 OD
Drain Piping
Special instructions for R410A
As R410 pressure is about 1.4 times higher than R407C,
improper installation may cause a serious trouble.
It is necessary to use the copper pipes, size of flare pipe ends
and flare nuts as shown below.
Thickness of Copper Pipes
Nominal Outer
Diameters Diameters
1/4 6.35
3/8 9.53
1/2 12.70
5/8 15.88
(mm)
2.0 2.5
∅15.88 (5/8) ∅15.88 (5/8)
∅ 6.35 (1/4) ∅ 9.53 (3/8)
∅ 18,5 OD ∅ 18,5 OD
(mm)
R407C R410A
0.80 0.80
0.80 0.80
0.80 0.80
1.00 1.00
Flare Pipe Dimensions
Nominal
Diameters
1/4
3/8
1/2
5/8
Flare Nut Dimensions
Nominal
Diameters
1/4
3/8
1/2
(mm)
A
Outer
+0/-0.4
Diameters
R407C R410A
6.35 9.0 9.1
9.53 13.0 13.2
12.70 16.2 16.6
15.88 19.4 19.7
(mm)
B
Outer
Diameters
R407C R410A
6.35 17 17
9.53 22 22
12.70 24 26