Hitachi RPC-4.0FSN3E - Refrigerant Pipe Connection for Heat Pump Systems (2 pipes) and Heat Recovery Systems (3 pipes)

The details of stop valves is as follows:
Gas valve Liquid valve
Check joint for service port
Tightening torque: 9.0 - 14.0 N-m
Cap
Tightening torque: 49.0 - 58.0 N-m
Spindle valve
Counterclockwise...Open
Clockwise...............Close
Tightening torque: a N-m
Refrigerant
pressure
Hexagonal wrench
Check joint for service port
Tightening torque: 14.0 - 18.0 N-m
Cap
Tightening torque: 33.0 - 42.0 N-m
Spindle valve
Counterclockwise...Open
Clockwise...............Close
Tightening torque: 7.0-9.0 N-m
Refrigerant
pressure
Refrigerant piping
Flare nut
Tightening torque: b N-m
Only the charging hose can be
connected.
Hexagonal wrench
To open or close
spindle valve
O-ring
Model
Tightening Torque (Nm)
a b
RAS-(8-12)FSXN1E
RAS-(5-12)FSXNH(E)
18.0 - 22.0 33.0 - 42.0
RAS-(14/16)FSXN1E 25.0 - 31.0 50.0 - 62.0

Refrigerant pipe connection
For heat pump systems (2 pipes)
RAS-(8/16)FSXN1E
RAS-(5-8)FSXNH(E)
A
B
C
D
E
F
G
RAS-(10/14)FSXN1E
RAS-10FSXNH(E)
A
B
C
D
E
H
I
RAS-12FSXN1E
RAS-12FSXNH(E)
A
B
C
D
E
F
J
G
A
Stop valve (Low pressure gas)
B
Stop valve (High/low pressure gas)
C
Stop valve (Liquid)
D
Flaring
E
Liquid pipe (eld-supplied)
F
Accessory pipe (B)
G
90º Elbow B (eld-supplied)
H
90º Elbow A (eld-supplied)
I
High/low pressure gas pipe (eld-supplied)
J
Accessory pipe (C)
For heat recovery systems (3 pipes)
RAS-8FSXN1E
RAS-(5-8)FSXNH(E)
A
B
C
D
E
F
K
G
G
RAS-14FSXN1E
A
B
C
D
E
G
H
K
L
RAS-10FSXN1E
RAS-10FSXNH(E)
A
B
C
D
E
L
K
G
H
RAS-16FSXN1E
A
B
C
D
E
G
KF
RAS-12FSXN1E
A
B
C
D
E
F
G
J
I
H
RAS-12FSXNH(E)
A
B
C
D
J
F
I
H
E
G
A
Stop valve (Low pressure gas).
B
Stop valve (High/low pressure gas)
C
Stop valve (Liquid)
D
Flaring
E
Liquid pipe (eld-supplied)
F
Accessory pipe (B)
G
90º Elbow B (eld-supplied)
H
90º Elbow A (eld-supplied)
I
High/low pressure gas pipe (eld-supplied)
J
Accessory pipe (C)
K
Accessory pipe (A)
L
Low pressure gas pipe (Field supplied)
41
PMML0294A rev.2 - 07/2014
Piping work and refrigerant charge
ENGLISH
PMML0294A_rev.2_02-2014.indb 41 14/07/2014 12:28:27