Hitachi FSXN Series Service Manual page 61

3 Piping work and
refrigerant charge
¿ Pipe connection kit (optional)
No.
Pipe connection kit Heat recovery system
¿
Example of installation (38 HP: 3 pipes)
Connection of front or rear pipes
D1
A
B
C
E1
F1
E2
G
F2
A. Gas pipe, low pressure (field-supplied).
B. Gas pipe, high pressure (field-supplied).
C. Liquid pipe (field-supplied).
D1. Gas connection kit, low pressure 1.
D2. Gas connection kit, low pressure 2.
E1. Gas connection kit, high pressure 1.
E2. Gas connection kit, high pressure 2.
¿
Size of pipes (ø mm) and selection of multikit (3 pipes)
(6)
2
(3)
3
L3
3
H4
4
CH
6
L3
G
(12)
A: main outdoor unit B, C: secondary outdoor units
3 pipes (high and low pressure gas, liquid)
Size of pipes
1. Pipe diameter for the outdoor unit.
54
SMGB0065 rev. 1 - 12/2010
Application in outdoor units
Mode
Outdoor unit
RAS-
(20-24)FSXN
RAS-
(26-36)FSXN
RAS-
(38-54)FSXN
J
D2
N
H
I
N
G
H5
C
A B
1 1 1
(6)
(1)
D E
L5
F
3
4 4 4
CH CH CH
L3 L3
6 6 6
L4
G G G
4 6
5
b
a
H2
L1
c 6 d d 6 e
L2
G G
H3
G
2 pipes (gas, liquid)
No. of outdoor units
2 MC-20XN
2 MC-21XN
3 MC-30XN
Lower pipe connection
A A
B B
C C
E1 E1
F1 F1
F1. Liquid connection kit 1.
F2. Liquid connection kit 2.
G. Accessory for connection of pipes (L-shaped).
H. Outdoor unit 3.
I. Outdoor unit 2.
J. Outdoor unit 1.
K. Accessory for connection of pipes (Z-shaped).
N. Accessory for connection of pipes.
CH
L3
L4
6
G
H1
4
a
CH
c
G
D: connection kit 1 E: connection kit 2
Model Notes
For three pipes:
• Gas, high pressure: 1 part.
• Gas, low pressure: 1 part.
• Liquid: 1 part.
D1 D1
J J
H H
K K
I I
K K
G G
D2 D2
E2 E2
F2 F2
G G
4 4 4
CH CH
6 6
G G
6 d 6 e 6
G G
G: indoor units
2 pipes (low pressure gas, liquid)