BIFFI EFS2000v4 - Page 57

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BIFFI FAIL SAFE ELECTRIC ACTUATORS, MODEL EFS2000V4
InstructIon and operatIng Manual
16.2 Control group functions
The EFS2000v4 is equipped with a hydraulic
Control group with two base functions:
- Adjustment of failsafe time.
- Manual override to operate the actuator
whenelectrical power is not available.
16.2.1 Adjustment of failsafe time
The adjustable flow control valve (526) allows
you to adjust the failsafe speed. This valve is
located under the aluminium cover positioned
on the upper side of the hydraulic manifold.
Remove the cover by unscrewing the 2 screws
in order to regulate the flow control valve: by
turning the ring nut of the valve clockwise, the
fail-safe speed decreases.
Remove the cover Adjust the fail safe speed
IMPORTANT
The failsafe time should not exceed the electric
stroke time.
A longer failsafe time will trigger the torque
alarm intervention on the electronic control of the
electric actuator.
16.2.2 Manual override to operate the EFS2000v4
when electrical power is not available
When electric power is not available, the
EFS2000v4 can be locally operated through an
hydraulic hand pump (540).
Before operation of the hand-pump, it is required that
the electromagnetic clutch is not energized: press
the OFF push button (red mushroom) on the clutch to
de-energize it.
To select the MANUAL operation mode of the actuator,
rotate the two-position (AUTO/MANUAL) hydraulic
local selector (998).