Hitachi RAS-8FSXNS2E Installation & Operation Manual page 44

◆ Details of stop valves
Gas valve
Cap
(Check the shape)
Hexagonal wrench
To open or close
spindle valve
Cap
Spindle valve
Counterclockwise: Open
Clockwise: Close
Tightening torque (Nm)
Outdoor unit
(Base unit)
Cap
air365 Max
42.0 - 48.0 22.0 - 28.0 9.0 - 14.0
(Pro)
◆ Details of stop valve piping connection
Heat pump system (2 pipes)
Stop valve
(Liquid)
Flaring
Liquid pipe
(Field-supplied)
PMML0628 rev.0 - 05/2023
Check joint for
service port
Refrigerant
pressure
Spindle Check
valve Joint
air365 Max
air365 Max
air365 Max (Pro)
Stop valve
(Gas)
90° Elbow
(Field-supplied)
Accessory pipe
(Gas Line)
Liquid valve
Check joint for service port
Only the charging hose can
be connected.
Cap
O-ring
Hexagonal wrench
To open or close
spindle valve
Spindle valve
Counterclockwise: Open
Clockwise: Close
Refrigerant
piping
Tightening torque (Nm)
Outdoor unit
(Base unit)
Cap
8 - 12 33.0 - 42.0
14 - 18 33.0 - 42.0
20 - 24 50.0 - 62.0 9.0 - 11.0 68.0 - 82.0
5 - 6 33.0 - 42.0
8 - 14 33.0 - 42.0
Pro
16 - 18 50.0 - 62.0 9.0 - 11.0 68.0 - 82.0
Check Joint
Heat recovery system (3 pipes)
Stop valve
(Liquid)
Flaring
Liquid pipe
(Field-supplied)
90° Elbow
(Field-supplied)
Accessory pipe
Refrigerant
pressure
Flare nut
Wrench
size
Spindle
Flare nut
(mm)
valve
7.0 -9.0 33.0 - 42.0 4
7.0 -9.0 50.0 - 62.0 4
5
7.0 -9.0 33.0 - 42.0 4
7.0 -9.0 50.0 - 62.0 4
5
14.0 - 18.0
Stop valve
(High/Low Pressure Gas)
Stop valve
(Low Pressure Gas)
90° Elbow
(Field-supplied)
Accessory pipe
3
37