TM
5
Installation Operation & Maintenance manual ELQ
DOC.55.EDN Rev: E
October 2012
2
PrINCIPLES OF OPErAtION
2.1
Drive principle
2.2.1 Manual operation
2.1.1 Control signal “open”: counter-clockwise rotation, valve
opens.
2.1.2 Control signal “closed”: clockwise rotation, valve closes.
To operate the manual override during power failure
or setting use the handwheel. You do not need to
engage or disengage the manual override before
manual operation.
Note
•
The manual override design is intended for
use in emergency situations without electrical
power to the actuator.
•
If the handwheel is turned while the actua
-
tor is in control, the actuator will compensate
and attempt to move the actuator to its origi
-
nal commanded position.
The handwheel does not rotate during power opera
-
tion.
• Turn the handwheel clockwise to close the valve.
• Turn the handwheel counter-clockwise to open
the valve.
2.2
Manual override