Hitachi FSXNHE Serie Installations- Und Betriebshandbuch Seite 55

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