OSCNS209-EN
5/7
INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS
HANDLING & STORAGE
HANDLING
Proper care in handling the valve should be taken to
prevent damage. Do not drop or throw it.
STORAGE
Store the valve in the protected area from dust,
moisture, and direct sunlight. If possible, valve should
be kept in the original packaging.
CHECKING
• Check the product code, power supply, and voltage
before installation.
• Make sure that the bolts are not loose.
INSTALLATION
PRECAUTIONS
Flush the pipeline carefully before installing the valve.
Foreign particles, such as sand or pieces of welding
electrode, will damage the trim and seats.
INSTALLATION NOTES
• This type valve has a flow direction. Install the valve
accordingly.
• NS / NH / NP type has a flow direction. Install the
valve accordingly.
• When the Cv value is small, the foreign object
contained in the fluid causes blockage. The filter is
used in front of the valve.
Threaded End Rc (NS / NH type)
• If seal tape or sealant protrudes into the valve,
malfunction may result.
Pay attention to tape treatment and coating amount.
Flanged-end (NP type)
• Use only rubber gasket for plastic flange.
• Use spring washer to prevent from decreasing
surface pressure gasket when the temperature
change happens frequently.
• Tighten all bolts using crossover method to load the
joint evenly.
• Wafer type needle valve is put between two seats of
flanged-end and tightened with long bolts.
SUPPORT
Use proper support to prevent distortion of the valve.
ENVIRONMENT
• Do not install in place where corrosive gas is present
or where vibration is heavy (0.5 G or more).
• When radiant heat causes the surface temperature of
the control unit to exceed 50 °C, provide an
appropriate shielding plate.
• If there is a possibility that the fluid and drive part
freeze, please take measures to prevent freezing.
POSITIONING
• Should be positioned through 90° upward from
horizontal. Provide space around the product to allow
manual operation, inspection and replacement work.
• Maintenance space more than 90 mm upward from
the actuator is required.
OTHER NOTES
Until the wiring is completed there must be no
condensation or flooding in the interior of the actuator,
after piping. Protective caps on the cable gland are
not waterproof.
WIRING
• Do not wiring outdoors on a rainy day.
• Check the power supply and voltage.
Connect the signal as shown in the wiring diagram.
Do not connect unnecessarily terminal.
• Use suitable flexible cable ( 5 to 10.5 mm).
Lock and seal the cable completely to prevent
condensation inside the actuator.
• Built-in terminal block can clamp up to 1.5 mm in
diameter without using solderless terminal.
• Allow proper cable slack for maintenance.
• Actuator should be electrically grounded.
Use the terminal marked ( ) inside the actuator.
PREVENT DEW CONDENSATION
• When installing the cover after wiring, perform the bolt
by the temporary tightening procedure and the
permanent tightening procedure to tightly and
securely tighten the rubber packing so that water does
not enter from the outside.
• Tighten the cable gland nut so that there is no leakage
from the wire entrance.
