Quarter -Turn Electric Valve Actuator【OM Series】 Sun Yeh Ele. Ind. Co., Ltd. | 2021.11
1. General Information
Failure to follow safety instructions may cause serious injury, equipment damage, or
voided warranty.
1.1 Safety Instructions
Installation, maintenance and repair works must be performed by trained personnel.
The handling shall follow the safety and warning instruction contained in this manual.
The user should read and follow instructions contained in this operation manual included
with the product. Failure to do this may result in damages and void warranty. Sun Yeh
will not be liable for damages due to operator negligence or misuse.
Local health and safety legislation shall be complied with.
In a few cases, the surface temperature may exceed 60°C (140 ℉). Please check the
surface temperature before operation, using an appropriate thermometer and wearing
protective gloves before operation.
1.2 Installation Notices
Before operating a three-phase voltage actuator, please manually operate it to
mid-travel position by the handwheel and power up to check if it rotates properly in
order to verify the phase sequence is correct. If it is incorrect, please correct the
phase errors by changing the connection of any two of power supply wires U, V, W
to prevent the actuator from mechanical damages.
Operating by handwheel：
Do not use any tools to increase force on handwheel for operating as this can
damage the actuator or valve.
Please read operation manual and wiring diagram carefully before installation.
Verify that supply voltage is in accordance with the data on nameplate to prevent short
circuit or electrical/electronic parts damage caused by incorrect power input.
Turn power off before wiring or maintenance.
Connect the ground wire to PE point inside the electric actuator.
To avoid functional failure caused by static, do not touch any components on the PCB
with metal tools or bare hands.
Do not parallel wire multiple actuators together without using an extra relay.
Use suitable water-proof cable gland to ensure it fits the conduit entry size, diameter of the
cable and the enclosure protection of the actuator when wiring. The water-proof cable
gland must be tightened and flattened to the cable after wiring procedure and use proper
water-proof plug to seal unused conduit entry and fasten the top cover of the actuator to
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