Limit Switch Adjustment - Emerson Bettis EHO Installation And Operation Manual

Installation and Operation Manual
Part Number: VA001-507-32, Rev. 1
4.6.5
4.6.6
NOTE:
If the EHO Actuator is supplied with optional ESD, before operating a motor-powered
stroke, a customer supplied ESD signal must be present and Solenoid Valve (P)
energized.
4.6.7
4.6.8
4.7

Limit Switch Adjustment

4.7.1
4.7.2
Figure 19
Set-up/Start-up Procedure
While observing the inspection port, for motor rotation, push and release the
OPEN/CLOSE PUSHBUTTON to Power Stroke the actuator and immediately push
the STOP Pushbutton. Motor rotation should be counterclockwise when looking
at the back of the motor.
If needed, correct motor rotation.
Push and release the OPEN/CLOSE PUSHBUTTON to Power Stroke the actuator.
The Electric Motor (Z) will start to run driving Hydraulic Pump (Y). The
Hydraulic Pump (Y) draws fluid from Reservoir (I) and pushes it into the Bettis
G-series hydraulic cylinder (W).
Shut off the electrical power going to the unit, if an (optional) Circuit Breaker
Module is supplied, turn the Circuit Breaker to OFF.
To complete limit switch adjustment, the actuator will need to be stroked from
a fully closed position to a fully open position etc. several times. In the following
instructions, the electric motor is used to Power Stroke the actuator. If it is not
safe or possible to use the electric motor at this time, use the Hand pump to
Power Stroke the actuator.
The limit switch adjustments are found in a covered compartment in line with
the valve stem and on the opposite side of the control box. Remove the limit
switch compartment cover by loosening the four corner bolts retaining it.
All covers have tapped holes for jackscrews to aid in removing the cover. Use
the retaining screws in these holes to lift the cover evenly at each corner. Use
caution to not allow the cover to bind during removal.
Remove Cover for Limit Switch Chamber
Section 4: Set-up/Start-up Procedure
August 2016
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