9
protected from harmful climate impacts. If stored for a period longer than 1 year we recommend the oil charge to be
replaced prior to commissioning. Any manipulation with the actuators at temperatures lower than -25 °C is forbidden.
It is impermissible to store actuators outdoor or in areas unprotected from rainfall, snowfall and/or ice. Surplus
preservative grease must be only removed before commissioning the actuator. When storing unpacked actuators for
a period exceeding 3 months, we recommend you to insert a small bag with silica gel or another suitable desiccant
material into the terminal box.
7. CHECKING OF THE INSTRUMENT FUNCTION AND ITS LOCATION
Before starting to install the device, again check actuator for any damage suffered in the course of storage.
The function of electric motor can be verified by connecting it to power supply through a switch and by powering it up
shortly. It is sufficient to observe if the electric motor starts up and if the output shaft starts rotating. Rotary actuators can
operate in any position when the electric motor axis is not more than 15 degrees below the horizontal level. Actuators must
be located in an area providing easy access to manual control wheel, terminal box and control box. Also, i t must be verified
again if the location meets the provisions of section
“Operating Conditions”.
If local conditions require another method of
installation, manufacturer’s approval must be obtained.
8. ATTACHMENT
Set actuator onto the valve so that its output shaft reliably fits into the valve coupling. Use four
(eight)
screws to connect
actuator with valve. Turn hand wheel to check correct connection between actuator and valve. Remove cover of terminal box
and carry out electrical connection of actuator according to internal connection diagram.
9. ADJUSTMENT OF THE ACTUATOR
Having fitted the actuator onto the valve and checked for correct mechanical connection proceed with the actual set-up
and adjustment.
1. Shift the actuator manually to an intermediate position.
2. Connect the actuator to power supply line, and shortly switch to verify correct rotation direction of the output shaft.
When looking inside the control box, the drive wheel of the positioning units will rotate clockwise, while moving in
“closing“
direction.
3. Electrically set actuator close to
“closed”
position, use hand wheel to arrive precisely at the
“closed”
position. In this
“closed”
position set the positioning unit
(micro switch SQT1 (PZ) according to point 5c).
4. Set output shaft to a position, where the signalling switch SQT2
(SZ)
is supposed to change over. Adjust SQT2
(SZ)
switch according to instructions specified under point 5b).
5. Turn the actuator output shaft by the required number of revolutions
(working stroke)
and set the switch to SQC1
(PO)
“open”
position as described under point 5c).
6. Set output shaft of the actuator to the position, where the signalling switch SQC2
(SO)
is supposed to change over. Adjust
the SQC2
(SO)
switch according to instructions specified under point 5b). Setting of positioning and signalling switches
must be checked repeatedly.
Important notices
a) After mounting the valve with the actuator on the pipeline use hand wheel of the actuator to set the valve
into its central position. Short-term running of the electric motor must be used to detect whether the actuator
output shaft rotates in the correct direction, i.e., whether it responds correctly to the shutdown using the
appropriate torque or positioning switches. Verification can be performed by pressing the handle of the respective
switch with a suitable tool preferably made of insulating material or at least with a handle made of insulating
material.
If the actuator does not rotate in the right direction, switch the two phase conductors at the terminal board of
the actuator
(terminals 1, 2, 3).
b) After mounting the valve with the actuator on the pipeline it is necessary to mount a pressure relief valve to the
power cabinet of the actuator. For this purpose there is a power cabinet of the actuator provided with holes with
plug bolts. A pressure relief valve is mounted into the uppermost hole instead of the plug bolt, whereby it must
be ensured that the pressure relief valve axis is vertical.
