Outdoor Unit Stop Valve - Hitachi UTOPIA R32 Series Installation And Operation Manual

5.8.1 Outdoor unit stop valve
Operation of stop valve should be performed according to the figures and tables below:
Spindle valve

Flare nut

Cap

C heck joint for service port
 
Outdoor unit
Gas valve Liquid valve Gas valve Liquid valve Gas valve Liquid valve Gas valve Liquid valve
RAS-(2/2.5)HVRC3 7-9
RAS-3HVRC3 9-11
Spindle valve
Tighten the spindle with a torque above:
Counterclockwise....Open
Clockwise ...............Close
Check joint
(Only charging hose can be connected)
Tighten the cap with 16 N·m torque
Cap
Tighten the cap with 37 N·m torque
(Attach this after work)
(*) Size of hexagonal wrench size used for spindle valve:
Do not apply two
spanners at this
position. If applied,
leakage will occur
PMEN0654 rev.0 - 12/2023
Spindle Type
Tightening Torque (N·m)
 
7-9 34-42
7-9 68-82
Refrigerant pressure
Closed before shipment
2HP / 2.5HP
Gas valve 4 mm
Liquid valve 4 mm
Stop valve
(Spindle type)
Flare nut
Stop valve (liquid)
Closed upon factory shipping

14-18 33-42 33-42
34-42 33-42 33-42
Refrigerant piping
Hexagonal wrench
(field supplied) (*)
3HP
5 mm
4 mm
Do not work with two
spanners here.
Refrigerant leakage shall
occur
Use two spanners here for pipe
connection
Stop valve
(gas)

14-18 14-18
14-18 14-18
5
25