Safety Information; Assembly; Handwheel Operation And Declutching; Commissioning For On/Off Actuators - Bernard Controls EZ Serie Inbetriebnahmeanleitung

1 safetY inforMation

This device complies to current applicable safety standards. Installation, maintenance and use of
this actuator will have to be done by skilled and trained staff only.
Please read carefully the whole document prior to mounting and starting-up.

2 asseMBLY

Actuator should be secured directly to the valve using proper bolts or via a proper interface.
After assembly, the actuator can operate in any position. However, cable glands should not be
oriented upwards (loss of water tightness) and the motor will preferably not be positioned at the
bottom (potential internal condensation trap)
Note 1 : Do not handle the actuator by handwheel, it could damage the gearworm.
Note 2 : If the actuator was delivered mounted on the valve, the basic settings should have been done.
Note 3 : see §.7 for details on storage precaution prior to starting-up.

3 hanDwheeL operation anD DecLutching

In general, the handwheel does not turn during electrical operation. Even if turning, the solid
handwheel does not have any protruding part and therefore does not present any risk of any kind
for the operator. Moreover, for the actuators with the highest torque, the torque limit system
brings an additional level of protection.
EZ4 to EZ15 models:
These actuators are equipped with a manually declutchable handwheel.
To operate manually the actuator, turn while pulling the handwheel
in order to mechanically engage it.
To declutch the handwheel, just push it back towards the actuator
body.
EZ100 to EZ1000 models:
These actuators are provided with an automatic declutching hand-
wheel, with motor drive priority. In order to operate manually the
actuator, turn the arrow of the handwheel clutch button in front of the
triangular sign on the housing (it might be necessary to turn the hand-
wheel by a few degrees to release the claws). When the motor starts,
it returns automatically into declutched position.
EZ60 models:
These actuators are equipped with declutchable intermediate gears. By moving the clutch lever, the
motor is physically disengaged from the gears. Once the manual handwheel operation has been
completed, do not forget to clutch the motor back. Otherwise, once started-up, it would run and heat
up until the motor thermal protection switch closes. If repeated, these conditions can generate a motor
breakdown .
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for an actuator working on/off,
read direclY paragraph 4
for an actuator working with minigam positionner,
read direclY paragraph 5
4 coMMissioning for on/off actuator
4.1 eLectricaL connections anD preLiMinarY tests
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.
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.
4.2 setting of MechanicaL stops anD traveL LiMit switches
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.
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