WTR Series
Operation
L120 Installation & Maintenance Manual 120-11000 A
Operation
a WARNING: Do not manually operate the actuator with devices other than installed
Handwheel and Declutch Lever. Using force beyond the ratings of the unit and/or
using additive force devices such as cheater bars, wheel wrenches, pipe wrenches or
other devices on the actuator Handwheel or Declutch Lever may cause serious
personal injury and /or damage to the actuator or valve.
CAUTION: Do not motor operate the valve without first setting or checking the
limit switch setting and motor direction.
• Do not force the declutch lever into hand operation. If the clutch does not easily
engage, rotate handwheel slowly while operating the declutch lever.
• Do not alternately start/stop the motor to open or close a valve which is too tight
for normal operation.
Electrical Start-Up
1. Verify that the actuator has been correctly lubricated. This is particularly important if the
actuator has been in long-term storage.
2. Verify that the geared limit switch has been correctly set (see section entitled Setting Limit
Switch, page 7).
3. If the valve stem is not visible, remove the stem cover or handwheel cover plate to observe
output direction of the drive sleeve.
4. Engage manual operation and hand crank the valve well away from end of travel positions.
5. Turn on power supply and push button to "open."
6. Check output rotation:
• If phase rotation is correct, the valve should begin to open.
• If valve begins to CLOSE, STOP Immediately. Incorrect phase rotation will lead to
serious damage if the valve seats.
7. Correct the phase rotation one of two ways:
• Switch any two of the three power leads for three-phase power, or
• reverse the armature leads for single-phase or dc power.
The actuator should operate correctly and will be stopped at the end of travel positions by
torque or limit switch functions.
Figure 9 is a representation of a typical application and may not be applicable to your
specific actuator. Please refer to the wiring diagram supplied with your actuator to confirm
the actual equipment supplied.
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