How to open the valve
Open or close the valve.
Liquid side
Open the valve with a 4 mm hexagon wrench.
Gas side
• While the valve is fully opened, after the screwdriver
has reached the stopper, do not apply torque
exceeding 5 N•m. Applying excessive torque may
damage the valve.
Valve handling precautions
• Open the valve stem until it strikes the stopper.
It is unnecessary to apply further force.
• Securely tighten the cap with a torque wrench.
Cap tightening torque
Replenishing refrigerant
This model is a 30 m chargeless type that does not
need to have its refrigerant replenished for refrigerant
pipes up to 30 m.
Refrigerant replenishing procedure
1. After vacuuming the refrigerant pipe, close the
valves and then charge the refrigerant while the air
to water heat pump is not working.
2. When the refrigerant cannot be charged to the
specified amount, charge the required amount of
refrigerant from the charge port of the valve on the
gas side during cooling.
Requirement for replenishing refrigerant
Replenish liquid refrigerant.
When gaseous refrigerant is replenished, the
refrigerant composition varies, which disables normal
operation.
Adding additional refrigerant
• The refrigerant need not be reduced for a 30 meter
(or less) refrigerant pipe.
Valve size
Ø9.5 mm
33 to 42 N•m
(3.3 to 4.2 kgf•m)
Ø15.9 mm
20 to 25 N•m
(2.0 to 2.5 kgf•m)
Charge port
14 to 18 N•m
(1.4 to 1.8 kgf•m)
Valve unit
Charge port
Using a minus screwdriver,
turn it counterclockwise by
90° until it hits the stopper.
(Full open)
Flare nut
Handle position
Closed completely Opened fully
Main stopper
Movable part of valve (Stem)
Stopper pin
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