Storage; Manual Override Operation And Declutching; Actuator On Valve Assembly; Setting Of Mechanical Stops (Sq Range) - Bernard Controls SQ Manuel De Mise En Service

3 STORAGE

Introduction
An actuator consists of electrical components plus mechanical parts which have life-long lubrication.
Although the assembly is contained in a waterproof housing, the actuators may suffer from oxidation,
become clogged or seize during commissioning if it has not been stored correctly.
Storage
Actuators must be stored under cover in a clean, dry place which is protected against variations in
temperature.
Avoid storing directly on the ground. If stored in areas subject to damp, apply power to the actuator
to dry it out electrically. Check to ensure that the cable entries are sealed.
Ensure electrical component covers and compartments are properly sealed.
In case of a valve with an important stem lift, check that the stem protection cover is mounted on
the actuator. If not, assemble it with a weak sealing paste.
Inspection following storage
1. If stored for less than one year:
• Visual inspection of electrical parts.
• Operate buttons, selectors, etc. manually to ensure that they can be used without difficulty.
• Perform a few movements manually.
• Check consistency of grease.
• Commission the actuator.
2. If stored for more than one year:
• Long-term storage causes the consistency of the grease to change. To avoid any
grease-drying problem, do some rotations of the actuator several times a year by using
motor or manual override.
• Visual inspection of electrical parts.
• Operate buttons, selectors, etc. manually to ensure that they can be used without difficulty.
• For the actuators equipped with battery option. During the storage period, the circuit
is in low comsumption mode which allows to get a long lifetime of the battery. Beyond
a storage time of 3 years it is better to replace the batteries at the commissioning.
You can check the battery status at any time on the display.

4 MANUAL OVERRIDE OPERATION AND DECLUTChING

The handwheel does not turn during electrical operation.
SQ6 and SQ15 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.
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SQ20 to SQ80 models:
In order to ease the manual override, some of 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 .
SQ100 to SQ1000 and ST6 models:
These actuators are provided with an automatic declutching handwheel,
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 handwheel by a
few degrees to release the claws). When the motor starts, it returns
automatically into declutched position.
All ST models except ST6
Except ST6, all ST range actuators are provided with an automatical declutchling handwheel, with
motor drive priority. Operating direction is normally indicate on the handwheel.

5 ACTUATOR ON VALVE ASSEMbLY

Actuator should be secured directly to the valve (or the gearbox) 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 gears.
Note 2: see details on storage precaution prior to starting-up.
Note 3: Greasing of A form drive bush has to be done prior to mounting actuator on valve (in the
case of a rising stem valve).
SETTING OF MEChANICAL STOPS (SQ ONLY)
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Mechanical stops description and function (1/4 Turn only):
These items avoid any over-travelling during 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.
On quarter-turn actuators, mechanical end stops, located either on the actuator or the
gearbox, mechanically limit the actuator travel during manual operation.
It is mandatory that the motor stops, in both directions, on the travel limit switch and not
on the mechanical end stop (check available extra travel to the stop with the handwheel).
WARNING
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