NORTH AMERICA
7.0
Emergency operation
All the VALBIA electric actuators have an external handwheel “H”
(Fig.1), which can manually operate the closing and opening posi-
tions.The manual operation operates by put in a pressure on the top
of handwheel and by making a small rotation in order to engage the
stem to the handwheel. After engaging the manual operation you
can make desired the position you wish by keeping pressure on, and
turning the handwheel.
WARNING: the handwheel for the manual override can be used with
actuator NOT power supplied. Do not use tools to action the hand-
wheel.
WARNING: do not operate the manual override when the actuator
is turning.
WARNING: if the actuator, exceeds the stroke range by the manual
override, to reset it is necessary to power the actuator until it returns
to the limit switch position.
8.0
Fail-Safe Operation with battery backup (optional)
The versions with battery of Valbia electric actuator use battery
packs with series of cells in NiMh technology and nominal voltage
on terminals at 24Vdc.
For the actuators with battery back-up, VALBIA can set up the actua-
tor to automatically carry out one of the following actions in the event
of power outage:
•
Opening: the in-progress/current operation is interrupted.
•
Closing:
the in-progress/current operation is interrupted.
•
Completes the in-progress operation: the motor continues the
in progress action until it touches the travel stops/limit switches.
Battery operation is enabled after a delay of about 1 sec, it is instan-
taneous only if the emergency operation is consistent with the
operation in progress (for example, when the actuator is closing, the
supply voltage is lost and the battery set to NC intervenes).
The action in progress with the battery power supply is interrupted by
a possible mains voltage recovery.
A yellow light (LED) mounted on the power supply board indicates
that the board is charging the battery in TRICKLE mode.
When the battery is fully charged the LED light turn off.
The LED signal is reliable if the battery back-up has not been dam-
aged.
The battery is a component that guarantees a limited number of
charge / discharge cycles (over 500), therefore its life is inversely
proportional to the number of interventions.
WARNING: to guarantee the emergency battery intervention, it is
necessary that the actuator remains powered for more than 3 hours.
WARNING: for the version with battery it is recommended to power
the actuator within 3 months from the purchase date.
The actuator can also be used in “solenoid” mode (wiring with two
wires). To use this mode it is mandatory to follow the warnings above.
9.0
Maintenance
The electric actuator does not need any kind of maintenance. The
internal lubrication of the gears is sufficient for the device life. For
enclosure cleaning, use a light non-aggressive detergent. In case
of damages or operation issues, we suggest sending the actuators
back to Valbia for inspection.
Valbia s.r.l. declines responsibility and warranty on our actuators re-
paired from any third party.
8
IOM |
85 SERIES ON/OFF ELECTRIC ACTUATORS
