Hitachi RPK-0.8FSNH2M - Page 14

3
REFRIGERANT PIPING
8
3. Rear Side Piping
In case of left side piping, draining piping shall be
changed also from left side.
3.1.2. TIGHTENING WORK
- When tightening the flare nut, use two spanners as
shown below:
Pipe size
Tightening Torque (N.m)
Ø6.35 mm
20
Ø9.53 mm
40
Ø12.7 mm
60
Ø15.88 mm
80
Ø19.05 mm
100
- Insulate the refrigerant pipes as shown below :
3.1.3. SIZE OF PIPING CONNECTION
Model RPK-(0.8-4.0)FSN2M
(mm)
HP
0.8/1.0/1.5
2.0
2.5/3.0/4.0
Gas Piping
12.7
15.88
15.88
Liquid Piping
6.35
6.35
9.53
Model RPK-(1.0-1.5)FSNH2M
(mm)
HP
1.0/1.5
Gas Piping
12.7
Liquid Piping
9.53
 Flare Pipe Dimensions
(mm)
Nominal
Diameters
Outer
Diameters
A
+0/-0.4
R410A
1/4 6.35 9.1
3/8 9.53 13.2
1/2 12.70 16.6
5/8 15.88 19.7
 Thickness of Copper Pipes
(mm)
Nominal
Diameters
Outer
Diameters
R410A
1/4
6.35
0.80
3/8
9.53
0.80
1/2
12.70
0.80
5/8
15.88
1.00
 Flare Nut Dimensions
(mm)
Nominal
Diameters
Outer
Diameters
B
R410A
1/4
6.35
17
3/8
9.53
22
1/2
12.70
26
5/8
15.88
29
Stopper
Plate for pipe
Fix the plate
of pipes as
shown in the
right side
Thermal insulation
(Accessory)