HQ-004 Quarter-turn Electric Actuator
Installation Operation& Maintenance Manual
Doc No. : HumG-HQ004-21 Rev0 Page 7 / 9 Valve Automation Leader, HKC
5. Wiring
DANGER: HAZARDOUS VOLTAGE.
No electrical power should be connected until all wiring and limit switch adjustments
have been completed. Once the power is supplied to the unit, exercise caution when
the cover is not installed.
6. Maintenance
6.1. Maintenance
WARNING:
Turn off all power before attempting to perform maintenance on the actuator.
POTENTIALLY HIGH PRESSURE VESSEL. Before removing or disassembling your actuator,
ensure that the valve or other actuated device is isolated and not under pressure.
Under the normal conditions, maintenance should be carried out at six month intervals. But when the
conditions are more severe, more frequent inspections may be advisable.
6.1.1. Ensure that the actuator is properly aligned with the valve or other actuated device
6.1.2. Ensure that all wirings are insulated, connected and terminated properly
6.1.3. Ensure that all screws are present and tight
6.1.4. Ensure cleanness of internal electrical devices
6.1.5. Ensure that cable connections are properly installed and are dried
6.1.6. Check the internal devices for any condensation
6.1.7. Check the power to the internal heater
6.1.8. Check enclosure O-rings seals and verify that the O ring is not pinched between each joint.
6.1.9. Verify the declutch mechanism
6.1.10. Visually inspect the open/close cycle
6.1.11. Inspect the identification labels for wear and replace it if necessary
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