Commissioning For Switch Actuator; Setting Of Mechanical Stops And Travel Limit Switches - Bernard Controls Range EZ Serie Instructions De Mise En Service

4 COMMISSIONING FOR SWITCH ACTUATOR

4.1 ELECTRICAL CONNECTIONS AND PRELIMINARY TESTS
The following points must be checked:
a) Make sure that power supply voltage is in accordance with the data engraved on the actuator
nameplate
b) Check that all cable glands are correctly tightened,
c) Move the valve manually to an half-open position,
d) Operate an electrical opening and check that the motor rotates in the right direction. Press
manually on the «OPEN» travel limit switch ; the motor should stop.
In the same way, check that the closing electrical command as well as the «CLOSED» travel
limit switch are working correctly,
e) All models except EZ4 to EZ15 : Operate an electrical opening. Press manually on the «OPEN» torque
limit switch ; the motor should stop. In the same way, operate an electrical closing check that
the «CLOSED» torque limit switch is working correctly,
If any misfunction was detected at this stage, please check the overall wiring.
For safer working conditions, we recommend that the power supply now be switched off especially
if the actuator output max. torque exceeds 300 N.m.

SETTING OF MECHANICAL STOPS AND TRAVEL LIMIT SWITCHES

4.2
4
FOR AN ACTUATOR WORKING SWITCH,
READ DIRECLY PARAGRAPH 4
FOR AN ACTUATOR WORKING WITH EZ LOGIC,
READ DIRECLY PARAGRAPH 5
All components of the actuator are wired to a common
terminal strip. Remove the cover and pass the cables through the cable
glands (M20). Refer to the wiring diagram for details on the terminals
numbering system.
Both thermal protector and torque limit switches must be integrated into
your control system (see wiring examples) in order to prevent potential
damage to the actuator or valve.
Mechanical stops description and function :
These items avoid any over-travelling during handwheel operations.
The stops can be positioned either on the actuator itself or on the 1/4 Turn
worm gearbox if any.
Actuators and gears are supplied and tested for a 90° operation.
Fine adjustment of the stop screws position is possible within a limit
of ± 2° maximum.