Hitachi RAS-4FSNME1 Instruction Manual page 18

PIPING WORK
8.2 STOP VALVES
LIQUID VALVE
(Spindle type)
RAS-(4-6)
FS(V)NME1
RAS-(8-12)
FSXNME1
B
A
C
D
HEX4
Tightening torque (Nm)
A 33-42
B 14-18
C 33-42
D/E 7-9
Nº Description
Cap
A
Core valve
Check Joint
B
Only the charging hose
cap
can be connected.
!
C A U T I O N
Flare nut
C
If the flare nut is tightened too hard, the flare nut
may crack after a long time and cause refrigerant
leakage.
Open – Counterclockwise
Spindle
D
Close – Clockwise
This valve is opened or closed by rotating 90
degrees. Rotate the stem until the pin touches
E Stem
the stopper. Do not apply extra force. Do not
leave the ball valve partly open.
18 PMML0532 rev.1 - 12/2020
GAS VALVE
(Ball type)
RAS-(4-6) RAS-(8-12)
FS(V)NME1 FSXNME1
A
A
B
B
C
C
E
1.5mm
90º
90º
20-25 27.5-32.5
14-18 12-14
68-82 95-105
≤5 ≤5
Remarks
(4-6)HP
1
4
Liquid pipe (ø9.52)
(field-supplied)
Liquid pipe (ø15.88)
(field-supplied)
10HP
1
2
Liquid pipe (ø9.52)
(field-supplied)
Accessory pipe (*)
E
(OD19.05→ID22.2)
Gas pipe (ø22.2)
(field-supplied)
6mm
8HP
1
2
Liquid pipe (ø9.52)
(field-supplied)
Gas pipe (ø19.05)
(field-supplied)
Accessory pipe
(OD19.05→ID15.88)
Gas pipe (ø15.88)
(field-supplied)
12HP
1
2
Accessory pipe
(OD9.52→ID12.7)
Liquid pipe (ø12.7)
(field-supplied)
Accessory pipe (*)
(OD19.05→ID22.2)
Accessory pipe
(OD19.05→ID25.4)
Gas pipe (ø25.4)
(field-supplied)
Gas pipe (ø22.2)
(field-supplied)
?
N O T E
• Flare all the pipes and accessories to connect with the stop valves.
• (*)Cut the accesory
Heat pump
8HP
1
2
Liquid pipe (ø9.52)
(field-supplied)
Gas pipe (ø19.05)
(field-supplied)
12HP
1
2
Accessory pipe
(OD9.52→ID12.7)
3
Liquid pipe (ø12.7)
(field-supplied)
Accessory pipe
(OD19.05→ID25.4)
Gas pipe (ø25.4)
(field-supplied)
Heat recovery
10HP
1
2
Liquid pipe (ø9.52)
(field-supplied)
3
Accessory pipe (*)
(OD19.05→ID22.2)
Gas pipe (ø22.2)
(field-supplied)
Gas pipe (ø19.05)
(field-supplied)
Nº Description
Stop valve for liquid line

Stop valve for gas line (Low)

Stop valve for gas line

(High/Low)
Stop valve for gas line

3
!
C A U T I O N
Use a reducer valve when
nitrogen gas blowing is performed
during brazing. The gas pressure
should be maintained within 0.03
to 0.05 MPa. If a excessively high
pressure is applied to a pipe, it will
cause an explosion.
OD19.05→ ID22.2/25.4.
3
3
3