Proportional Control Board (Option); Heater Resistance (Option); Maintenance And Storage Instructions - Bernard Controls LEB Anleitung Für Die Inbetriebnahme, Lagerung Und Wartung

Procedure of mechanical stops and travel limit switches setting :
a) Loosen stop screws by 2 turns (1/4 Turn only).
b) Manually drive the valve to the closed position. For the 1/4 Turn devices, if mechanical stops are
reached before the valve closing is completed, it means that the 2° maximum adjustment tole-
rance has been exceeded ; do not try to go beyond this limit.
c) Release the cams by unscrewing the cams locking toothed wheel.
d) Set the black cams.
e) Turn the stop screw located by the actuator name plate clockwise to the mechanical contact,
reloosen 1.5 turn, and secure by lock nut.
Proceed in the same way dor the open position (white cams and stop screw located by the the motor).
Tighten the cams locking toothed wheel.
Perform complete electrical valve opening and closing operations. It is mandatory that the motor stops
on the travel limit switch and not on the mechanical stop (check available extra travel to the stop with
handwheel).

5 PrOPOrtiONAL cONtrOL BOArD (OPtiON)

The proportional control board allows to drive the valve to intermediate positions.
Perform the electrical wiring according to the "Positioner version" diagram supplied in this document.
2 Led turn on to indicate a that the actuator is running (green for the opening direction / red for the
closing direction).
Configuration
The type of input (setpoint) and output (feedback) signals can be selected thanks to three dip switches.
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Cam function
Colour
(associated contact mark)
Cams locking toothed wheel
Closed position signalling
(ETLSC)
Open position signalling
(ETLSO)
Stops motor in closed position
(TLSC)
Stops motor in open position
(TLSO)
Input Output
Switches configuration
signal signal
1 2
0-10V 0-20mA B B
4-20mA 4-20mA A A
0-20mA 0-20mA B A
Settings
Note : the motor can be stopped by the positioner board but
also by the activation of one of the following contacts :
If the actuator stops at a position which is not the one required,
The dead band adjustment should be adjusted only if the actuator is "hunting" (e.g it cannot stop at
the desired position and keeps on moving around it).
In this case, use a small screwdriver to adjust the «Dead Band» potentiometer value until the ac-
tuator stops and stays at the desired position.

6 HEAtEr rEsistANcE (OPtiON)

The heater resistance board prevents built-up of water condensation inside the actuator in case of use
in a very humid atmosphere and large ambiant temperature variations.
The diagram on page 15 indicates the advised actuator power supply wiring for models equiped with the
heating device. (Neutral wired through the heater resistance board).

7 MAiNtENANcE AND stOrAGE iNstructiONs

Maintenance
If the actuator is correctly mounted and sealed, no special maintenance is required. Check once a year
function of motor and make sure that switch compartment is condensation free. If environment is humid,
we recommend the installation of an anti-condensation heater resistance and/or breathers, thus protec-
ting electric parts from alteration.
Actuators are lubricated with grease for lifetime. If the grease requires to be renewed, please contact us.
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Storage
B
a) The actuators should be stored under a shelter, in a clean and dry place and protected from wide
A temperature variations. Avoid placing the actuators directly on the floor.
b) For actuators equipped with an heating resistance, it is recommended to connect and supply it if
A
the storage area is humid (check voltage on actuator name plate).
Connect a milliamperemetre with or without loadbetween terminal 71
and 72 in order to read the output signal.
- Setting always starts with the 0/4mA.
- Drive the actuator to the closed position
- Unscrew the screw located under the large pinion (A) and turn the
small pinion (B) so that the output current reaches a minimum value.
Turn backwards until the current value regularly increases then turn
backwards again and stop as soon as the minimum value determined
here above has been reached. The potentiometer is then positioned at
the very beginning of its track.
- Tighten the large pinion screw.
- Drive the actuator to the open position,
- Precisely adjust the 20mA with the proportional control board poten-
tiometer marked as "P1".
- Come back to the closed position and check that, for the 0% position,
the signal current shows a close to 0/4 mA and repeatable value.
- open or closed end of travel contact (cf §4),
- motor thermal protection switch.
please check the status of these three contacts.
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