Hitachi UTOPIA R32 Series User Manual

25
PMEN0654 rev.0 - 12/2023
5
PIPINGCONNECTIONFOROUTDOORUNIT
REFRIGERANT PIPING AND REFRIGERANT CHARGE
5.8.1 Outdoor unit stop valve
Operaon of stop valve should be performed according to the gures and tables below:
Spindle Type
Stop valve (liquid)
Stop valve
(gas)

Spindle valve
 Flare nut
 Cap
 Check joint for service port
Closed upon factory shipping
Outdoor unit
Tightening Torque (N·m)
   
Gas valve Liquid valve Gas valve
Liquid valve
Gas valve Liquid valve Gas valve Liquid valve
RAS-(2/2.5)HVRC3 7-9 7-9 34-42 14-18 33-42 33-42 14-18 14-18
RAS-3HVRC3 9-11 7-9 68-82 34-42 33-42 33-42 14-18 14-18
Refrigerant pressure
Closed before shipment
Refrigerant piping
Hexagonal wrench
(eld supplied) (*)
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
(Aach this aer work)
(*) Size of hexagonal wrench size used for spindle valve:
2HP / 2.5HP 3HP
Gas valve 4 mm 5 mm
Liquid valve 4 mm 4 mm
Do not apply two
spanners at this
posion. If applied,
leakage will occur
Stop valve
(Spindle type)
Flare nut
Use two spanners here for pipe
connecon
Do not work with two
spanners here.
Refrigerant leakage shall
occur

Hitachi UTOPIA R32 Series Specifications

General

Brand	Hitachi
Model	UTOPIA R32 Series
Category	Air Conditioner
Language	English