CLA-VAL 34 Series Installation Operation & Maintenance

Electronic Actuator for 34 Series Pilot Controls
Electronic Actuator for 34 Series Pilot Controls
Thank you for purchasing a 34 Series Electronic Actuated
Pilto Control. With proper maintenance, the actuator will perform
indefinitely and provide very accurate and reliable valve control. It
is built with the latest technology utilizing the highest quality com-
ponents.
34 Series Controls
The 34 Series Actuated Pilot Controls for 300 Series Valves
consist of a hydraulic pilot subassembly and 130VC-3 Actuator.
The Cla-Val Model CDHS-34, CRA-34, CRD-34, CMC-34, and
CRL-34 pilot controls are factory set to full adjustment range of the
pilot subassembly. The 34 Series Actuator accepts a 4 - 20 mA
remote command set point or dry contact closure and positions
spring-loaded hydraulic pilot subassembly as it maintains set point
of pressure or flow rate. The pilot subassembly is automatically lin-
ear between the limit settings.
34 Series Control Operation
A.) The 34 Series actuator allows 34 Series Controls to be
used in valve remote control applications where a simple change
of pilot set-point is needed. SCADA instrumentation provides set-
point control and verification communication based on this scale.
The actuator can also be controlled by simple contact closure.
B.) Other suitable valve remote control applications are
where 4 - 20 mA command input signal is calibrated to specific
high and low range values. SCADA instrumentation provides set-
point control and verification communication based on system
dynamic conditions and valve's re-ranged scale. Using a laptop
computer, the 34 Series actuator is calibrated in the field to specific
minimum and maximum pressure or flow control settings that are
in direct proportion to 4 - 20 mA command signal. Once values are
established, the valve will be linear between limits and set-point
will not exceed limits throughout the 4 - 20 mA signal range. For
example, when actuator is calibrated to 4 mA = 50 psi to 20 mA =
100 psi, a 12 mA command signal will result in a 75 psi set point.
34 Series Actuator Hardware Set-up
BEFORE running actuator or software program, complete the
following hookup steps:
Use good field wiring practices for low voltage DC analog instrumen-
tation wiring (use 20-gauge twisted pair shielded wire minimum).
Avoid potential ground loops. Avoid over tightening wiring connector
fasteners.
The enclosure is rated IP-68 (similar to NEMA 6P) submersible for
short periods of time. It is not intended for continuous underwater
use. Consult Cla-Val factory technical support if you have questions.
The ten-wire ten meter cable is permanently attached to 34 Series
actuator and should be terminated in suitable junction box or
directly into an above grade RTU or similar device. Care should be
used when attaching to wires to avoid damage. Installation of suit-
able protection from lightning is highly recommended.
There are no user serviceable parts inside the actuator and tam-
pering or opening it will void the warranty. The ten-wire actuator
cable is permanently attached. Internal damage not covered by
warranty will occur if cable is removed.
34 Series
INSTALLATION / OPERATION / MAINTENANCE
MODEL
FIELD WIRING STEPS:
Terminate wires only applicable to your application. For example,
minimal wiring requirements for power and remote set point are:
1.) Attach 12 to 24 VDC power to 34 Series Actuator cable.
Black wire is for (-) negative; Red wire is for (+) positive. Provide
minimum 500 mA supply.
2.) Attach 4 to 20 mA analog Remote Command Input (from
SCADA system or loop calibrator) to 34 Series Actuator cable.
Yellow is positive and Grey is negative.
*
Download Wiring Diagram from website (www.cla-val.com)
*
DO NOT WIRE 24 VDC POWER
3.) After wiring is complete and actuator is powered, it can be
used with 4 - 20 mA remote command input signal scaled to factory
default pilot control adjustment range (Operation A, above).
Troubleshooting Actuator Set-up
1.) The actuator LED will remain red for approximately 30
seconds after power on, and then will switch to green indicating
actuator is OK and that internal start-up test is complete.
2.) The actuator LED blinks red if there is a problem. After
resolving the problem, reset the actuator by turning power off for
ten seconds then on again.
3.) The actuator blinks red and green if still in the calibration
mode. It will be necessary to finish calibration.
Terminal strip not
supplied for
Illustration
purpose only