Hitachi RAS-(4-12)HNP(1)(E) - Outdoor Unit Stop Valve

3 Piping work and
refrigerant charge
70
SMGB0087 rev.0 - 12/2013
3.2.3 Outdoor unit stop valve
1 Remove the stop valve cap before performing the air tight test after connecting the are nut. Tighten the spindle valve
in clockwise according to the following table “Tightening Torque of Stop Valves.”
2 Tighten the are nut according the specied torque. If the tightening torque is excessive, it may cause refrigerant leaka-
ge from the spindle part.
3 Perform the air tight test after the tightening work. It is more effective to perform this work after x the are nuts for the
piping connection to the stop valves.
4 Use the charging hose for the check joint connection. When removing the charging hose from the check joint, a sound
may be heard by a small quantity of refrigerant leak. However it is not abnormality. Do not apply excessive force to the
end of opening the spindle. (Tightening Torque: < 5.0N-m)
SpindleType BallType
(a)

Spindle valve

Flare nut

Cap

Check joint for service port
Outdoorunit
TighteningTorque(Nm)
   
Gasvalve Liquidvalve Gasvalve Liquidvalve Gasvalve Liquidvalve Gasvalve Liquidvalve
RAS-(2-2.5)HVNP1 7-9 7-9 33-42 33-42 33-42 33-42 14-18 14-18
RAS-3HVNC1
RAS-3HVNP1E
9-11 7-9 68-82 33-42 33-42 33-42 14-18 14-18
RAS-(4-6)H(V)NC1E 9-11 7-9 68-82 33-42 33-42 33-42 14-18 14-18
RAS-(4-6)H(V)NP1E - 7-9 68-82 33-42 20-25 33-42 14-18 14-18
RAS-8HN(P/C)E - 7-9 100-120 33-42 20-25 33-42 14-18 14-18
RAS-10HN(P/C)E - 7-9 100-120 50-62 20-25 33-42 14-18 14-18
RAS-12HN(P/C) - 7-9 100-120 50-62 12-14 33-42 12-14 14-18
SpindleType
Nº Description Remarks

Cap

Allen wrench Hex 4 mm *

Refrigerant piping Field supplied

Flare nut

Refrigerant pressure To outdoor unit

Seat Surface Fully closed position

Check joint Only the charging those can be connected

Charge port cap

O-Ring Rubber

Spindle valve
Open – Counterclockwise
Close – Clockwise
«
Shaft
¬
Pin

Stopper
(a) Closed
This valve is opened or closed with rotating 90 degrees at the
ball valve part. Rotate the shaft until the pin touches the sto-
pper. Do not apply the extra force. Use a slotted screwdriver to
control the shaft. Do not leave the ball valve partly open
(b) Opened
BallType
(a) (b)