Refrigerant Piping; Piping Connection - Hitachi RPK-1.0FSN1M 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
Position of piping connection is the following, which is
available from all directions, top, left or right.
For Left Side
Insulation
Piping
410 (Gas)
480 (Liquid)

CAUTION:
Do not twist the pipe when bending the tube.
1. Right Side Piping
Cut the corner using a plastic cutter as shown below and
remove sharp edges completely.
2. Left Piping
Cut the corner at the left side using a plastic cutter as for the
right side piping.
Left Side
Cover
3. Rear Side Piping
Make a hole by removing the knock-out plate at the rear
side.
Contour of the Unit
108
For Right Side Piping
310 (Gas)
330 (Liquid)
For Rear Side Piping
Right Side
Cover
Plastic Cutter
Cut this corner
Right
Side
Cover
Right Side Cover
3.1.2. SIZE OF PIPING CONNECTION
In case of R407C
Model RPK
Gas Piping
Liquid Piping
In case of R410A (FSNE only)
Model RPK
Gas Piping
Liquid Piping
Special instructions for R410A
As R410A 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.
Flare Pipe Dimensions
Nominal
Diameters
1/4
3/8
1/2
5/8
Thickness of Copper Pipes
Nominal Outer
Diameters Diameters
1/4 6.35
3/8 9.53
1/2 12.70
5/8 15.88
Flare Nut Dimensions
Nominal
Diameters
1/4
3/8
1/2
5/8
(mm)
1.0/1.5
12.7
6.35
(mm)
1.0/1.5
12.7
6.35
(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)
R407C R410A
0.80 0.80
0.80 0.80
0.80 0.80
1.00 1.00
(mm)
B
Outer
Diameters
R407C R410A
6.35 17 17
9.53 22 22
12.70 24 26
15.88 27/29 29