Flowserve 180 Rotation Center-Off Kit - Manual (Page 4)

© 2004 Flowserve Corporation, Irving, Texas, USA. Flowserve is a registered trademark of Flowserve Corporation. FCD WCAIM2074-00 Printed in USA.
(Part IOM 19530)
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applications under a wide variety of industrial service conditions. Although Flowserve can (and often does) provide general guidelines, it cannot provide specific data and warnings
for all possible applications. The purchaser/user must therefore assume the ultimate responsibility for the proper sizing and selection, installation, operation, and maintenance of
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SPECIAL NOTE: If during any of these checks, the actuator
shaft stops other than at the required positions, a readjust-
ment of the center-off cams is needed. At no time should
both center-off switches be activated by their cams at the
same time.
The N.O. contacts on both center-off switches are typically
closed. The center-off switch levers must be tripped by their
center-off cams at different times.
Therefore, the center-off cams should be set as close to the
90 degree position as possible, yet the cam/switch actua-
tion for each switch is never at the identical position. If the
center-off switches are set to actuate at a close angular
differential, the actuator shaft may oscillate, or not operate.
Loosen one cam and move this cam to increase the actua-
tion differential between each of the center-off switches.
If the center-off switches are set to actuate at a wide angular
differential, the actuator will not stop at a true center-off
position. Adjust one or both cams to decrease the angular
differential between each of these switches.
H. As a final check, alternately apply power to terminals 1 and
4, 1 and 3, and 1 and 7 for AC (+ to 1 and - to 4;- to 1 and +
to 3; - to 8 and + to 7 for DC).
No oscillation or hunting of the actuator output shaft
should occur.
If the above problems are noted, simply readjust the center-
off cams, as noted in Step G.
IV. External switching and switch wiring for 75 DC actuators
Using a three-pole, rotary switch, connect as follows:
Link Pole 1, Position 1 to Pole 2, Position 3; connect to actuator
terminal 1.
Link Pole 1, Position 2 to Wiper Pole 3; connect to actuator
terminal 8.
Connect Pole 1, Position 3 to actuator terminal 4.
Connect Pole 2, Position 1 to actuator terminal 3.
Connect Pole 2, Position 2 to actuator terminal 7.
Connect Pole 3, Position 2 to actuator terminal 9.
NOTE: Pole 3, Position 1 and Position 3 are unused.
Connect positive supply to Pole 2 wiper (common).
Connect negative supply to Pole 1 wiper (common).
Indicator lamps for 0° are connected between actuator terminal
5 and positive supply. Indicator lamps for 180° are connected
between actuator terminal 6 and negative supply. No signaling
as standard is provided at center-off position.
V. Check all the wiring and ensure that all connections are firmly
made to their respective terminal or termination lug. Ensure
that the wires are run smoothly and kept out of the way of any
rotating parts.
Finish the installation of the center-off kit by replacing the actua-
tor cover and override knob (if any) and attaching the “OPEN”
label (supplied in the kit) in a position that is 180° from the
existing “OPEN” label, which should already be attached to the
cover of the Watertight and Hazardous Environment actuators.
On General Purpose actuators (with no override knob), the
“OPEN” label is not used.
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FLOWSERVE FLOW CONTROL
Worcester Actuation Systems
5114 Woodall Road
P.O. Box 11318
Lynchburg, VA 24506-1318
Phone: 434-528-4400
Fax: 434-845-9736