Emerson Bettis EHO Installation And Operation Manual page 31

Section 4: Set-up/Start-up Procedure
August 2016
WARNING:
If the actuator is being installed in a hazardous area, use extreme care. This procedure
requires the limit switch cover to be open while electrical power is connected to the unit.
Follow these steps only when the atmosphere is free of explosive gases.
4.7.3
Figure 20
NOTE:
The Switch Targets will be labeled to identify the switch they operate.
28
Close Limit Switch Adjustment
4.7.3.1 The Open and Close Limit Switches, shown in Figure 20, are operated
by targets mounted in a plastic disk that rotates with the actuator
stroke. To adjust a Target, push down on it and slide it in a clockwise or
counterclockwise direction.
View of Limit Switch Targets
4.7.3.2 With the actuator in the Close Position, rotated fully clockwise, the
Target for CLOSE LS-2 will need to be adjusted.
4.7.3.3 Reconnect electrical power to the unit.
4.7.3.4 Push down on the Target for CLOSE LS-2 and move clockwise until it is
off of the switch in the clockwise direction. Both the OPEN and the
CLOSE lights on the PBM ((Pushbutton Module)) should be
illuminated
at this point.
4.7.3.5 Now, push down and slide the Target for CLOSE LS-2 counterclockwise
until the OPEN light just goes out. It is important to always adjust a
Target in the opposing direction of the valve travel to get an accurate
setting.
Installation and Operation Manual
Part Number: VA001-507-32, Rev. 1
Limit Switch #1 Target
Set-up/Start-up Procedure