Page 1
180° Rotation,
Center-Off Kit
For 10-30 75 Electric Actuators
FCD WCAIM2074-00 (Part 19530)
Installation
NOTE: This kit should not be used with actuators with extra limit
switches. To add a center-off kit to an actuator with more than two
switches, consult the factory. The differences for 75 DC actuators
are either in parentheses or stated separately.
I. Changing a 90° actuator to a 180° actuator
A. Verify 90° operation of the existing actuator.
1. Connect power to terminals 1 and 4 for AC (+ to 1 and
- to 4 for DC). The actuator will turn clockwise to the
initial zero position.
Limit switch #1 on the right side of the actuator (viewed
from the terminal strip) stops shaft rotation in the
clockwise direction (CW). This stop point is 0° and is
the position where a ball valve is closed.
The bottom cam on the actuator shaft (called the #1
cam) actuates this limit switch.
2. Connect power to terminals 1 and 3 for AC (- to 1 and +
to 3 for DC). The actuator shaft will turn counterclockwise (CCW).
Installation, Operation and Maintenance
2. Perform cam adjustment as follows:
a. Power actuator terminals 1 and 3 for AC (- to 1 and
+ to 3 for DC) to move the actuator shaft to its full
counterclockwise (CCW) position as established in
Step A2 of this procedure.
b. Loosen the set screws on the #1 cam and energize
terminals 1 and 4 for AC (+ to 1 and - to 4 for DC)
to move the actuator shaft clockwise (CW) a total of
180° to the new 0 position.
c. At this position, stop the actuator and adjust the #1
cam so that the limit switch (on right side of actuator, viewed from terminal strip) is actuated. Listen
for click. Retighten set screws on the cam.
NOTE: To ensure full rotation of the driven device,
set the actuator cams so that an additional 2° of
rotation can be achieved at each end position.
d. Verify that the actuator moves 180° by energizing
terminals 1 and 3 for AC (- to 1 and + to 3 for DC)
(CCW) and terminals 1 and 4 for AC (+ to 1 and - to
4 for DC) (CW).
Limit switch #2 on the left side of the actuator (viewed
from the terminal strip) stops shaft rotation in the
counterclockwise direction (CCW). This point is 90° and
is the position where a ball valve is open.
The top cam on the actuator shaft (called the #2 cam)
actuates this limit switch.
B. Adjusting actuator cams for 180° operation
1. Once proper operation of cams and switches for 90°
operation is verified: Adjust (see Step 2) the clockwise
cam (the bottom cam or #1 cam) so that the actuator
shaft can rotate 180°— ±90° from the initial zero (#1
limit switch) position.
Remember: The only stop point now common to
the 90 degree actuator is the CCW limit—the position where a 90° ball valve is open.
Page 2
Flow Control
SEE ENLARGED VIEW "A"
MOTOR
SWITCH 3
SWITCH 4
(IF USED)
MOTOR
1 2 3 4 5 6 7 8 9 1011 12
OVERSIZE FOR
CAM
3
(SHOWN SLIGHTLY
PICTORIAL CLARITY)
CAM
4
LIMIT SWITCH
LEVER
0°
N.P.T. CONDUIT
OPENING
OPEN
90°
CLOSED
4
3
CAM
2
CAM
1
CAM
CAM
4 PLACE
S
SWITCH SP
ACER
SW-2
SW-4
SW-3
SW-1
SPACER
2 PLACES
SPACER
25/30 ONLY
T
SPECIAL
SWITCHES
& CAMS
STANDARD
SWITCHES
& CAMS
{
{
WIRING
EXTERNAL
WIRING
INTERNAL
RED
N.O.
23
THRU
SIZE
S
ONLY
20
C
D
BLACK
C
C
N.O.
N.C.
SW-3
N.O.
N.C.
C
C
SW-1
N.C.
N.O.
N.C.
SW-2
SW-4
HELD CLOSED
1110 12876
ORANGE
543
BLACK
YELLOW
BROW
N
OPEN
CW
OPEN
CLOSE
INDICATION
CLOSE
INDICATION
CENTER-OF
F
POSITIO
N
921
WHITE
NEUTRA
L
COMMON
RE
DCCW
SWITCHES
SPECIA
L
& CAMS
SWITCHES
STANDARD
& CAMS
{
{
BLUE
C
C
SW-4
BLAC
K
RE
D
N.C.
N.O
.
N.O
.
SIZ
E
22
1211
ONLY
GRAY
BLUE
BLUE
C
109
BLUE
8
GRAY
7
ORNG.
BLUE
SW-3
SW-2
C
SW-1
6
BRN.
4
YEL.
53
BLK.
2
RED
C
N.C.
N.C.
N.O
.
N.O
.
N.C.
CENTER
CW
CCW
+
_
RED
1
BLACK
PROVIDED BY CUSTOMER
3P ROTARY SWITCH RECOMM
.
CENTER-OFF POSITION
1ST DIVER
T
90°
OPENING
POSITION
0°
N.P
.T. CONDUIT
2ND DIVER
T
POSITION
180°
180° Center-off Actuator
Series 75 W. X & Z Shown
Standard 90° Actuator
Series 75 W. X & Z Shown
1. Switch configuration is as shown abov
e
(When viewed from the terminal strip
side of the actuator).
2. Actuator shown at 0° position (all the way CW).
3. Cam settings are as follows:
Switch 1. Opens at 0°. Controls
1st divert position.
Switch 2. Opens at 180°. Controls
2nd divert position.
Switch 3. Opens at 89°. Controls
center-off position from
1st divert position.
Switch 4. Opens at 91°. Controls
center-off position from
2nd divert position.
Note: 1. Switches 1 and 2 and cams 1 and 2
are standard. Switches 3 and 4 and
Cams 3 and 4 are center-off type.
2. Use cam spacer as needed to line up
Cam and switch.
Typical View Showing Location of
Center-off Cams & Limit Switches
Set Up at the Center-off Position
VIEW
A
AC DC
Worcester Actuation Systems
II. Installation of the Center-Off Switch and Wiring
Wiring Notes: All wiring to terminal strip should be inserted
only to midpoint of terminal strip. Grounding wires should be
connected to green-colored grounding screw (if present) on
actuator base or to any baseplate mounting screw in actuator.
A. The 180° center-off switches’ lever arms will be located in
the same direction as the existing limit switches’ lever arms.
B. For 10-23 75 Actuators:
Remove the screws holding down the existing actuator limit
switches. Place the spacers provided in the kit between the
existing actuator limit switches (use straight lever arms) and
the new center-off limit switches (use hooked lever arms).
Replace and tighten the limit switch screws securely back
into position. (See diagram for switch identification.)
For 25-30 75 Actuators:
Remove the screws holding down the existing actuator
switches. Be sure the existing spacers remain under the
switches.
Place the spacers provided in the kit between the existing
actuator limit switches (use straight lever arms) and the new
center-off limit switches (use hooked lever arms). Replace
the limit switch screw with new longer screws (4-40 x 1½)
and securely tighten switches in their proper position. (See
diagrams for switch identification and spacer location.)
2 180° Rotation, Center-Off Kit for 10-30 75 Electric Actuator FCD WCAIM2074-00
Page 3
Flow Control
Worcester Actuation Systems
C. For 75 AC Actuators:
Connect the red wire of the center-off kit to the N.O. terminal
of switch #4 using the wire end which uses the 3⁄16" slide-on
connector. Connect the other end of the red wire, which
uses the ¼" slide-on connector to the capacitor terminal to
which the blue wire from N.C. terminal of switch #1 is connected, Push on the ¼” red wire connector at the capacitor
terminal. (See schematic wiring diagram.)
Connect the end of the black wire in the center-off kit, which
uses the 3⁄16" slide-on connector, to the N.O. terminal of
switch #3. Connect the other end of this black wire, which
uses the ¼" slide-on connector, at the capacitor terminal to
which the gray wire from N.C. terminal of switch #2 is connected (not the gray wire from the motor).
Connect the other two terminations on the orange wire to
the common terminals of switches #3 and #4. Connect the
stripped end of the orange wire in the kit to terminal 7.
D. For 75 DC Actuators:
NOTE: DC center-off wiring diagram shown is for sizes 10,
20 and 23 actuators. For 12 and 22 sizes, the red/black
motor leads are reversed.
Connect common terminal of switch #4 to terminal strip 1 or
splice with present wire. Use red wire from center-off kit.
NOTE: Do not remove existing red motor wire.
Connect N.O. terminal of switch #3 to N.O. terminal of
switch #4 and on to terminal strip 7. Use orange double wire
from center-off kit.
Connect N.C. terminal of switch #4 to terminal strip 9. Use
blue wire approximately 7" long from center-off kit.
Connect N.C. terminal of switch #3 to terminal strip 8. Use
gray wire from center-off kit.
Connect C (common) terminal of switch #3 using blue wire
from center-off kit. Join together with splice containing other
two blue wires from N.C. of switches #1 and #2 and black
wire(s) from motor lead.
Check all the wiring to ensure that it is smooth and out of
the way of any rotating parts; ensure that all connections are
firmly made.
Ill. Installation and adjustment of “center-off” cams
B. For 10-23 75 Actuators:
Place the cam spacer, cam #3, cam spacer, and cam #4 over
the shaft.
CAUTION: Do not bend the limit switch levers.
a
Loosen their set screws as necessary to slide the cams into
position. There are now four cams on the shaft. Per the
drawing, the cams are numbered 1 through 4, from bottom
to top. (See proper drawing for the approximate location and
correct orientation of the center-off cams.)
C. For 25-30 75 Actuators:
Place the two slotted bushings into the two center-off cams
(#3, #4). Loosen the cam set screws as necessary. Over the
actuator’s sensing shaft, slide a cam spacer (nylon washer),
cam #3, the other cam spacer, and cam #4. There are now
four cams and two spacers on the sensing shaft. Per the
drawing, these cams are now numbered 1 through 4, from
bottom to top. (See proper drawing for approximate location
and correct orientation of the center-off cams.)
D. Using the manual override (see the series 75 actuator instal-
lation operation and maintenance instructions) as necessary,
set the actuator shaft to a “center-off” location.
Set cam #3 such that hook of switch #3 lever arm has
just dropped off the cam. Tighten cam screw without
moving cam.
Set cam #4 such that hook of switch #4 lever arm will match
the arch of cam #4. Tighten cam screw without moving cam.
Release manual override.
E. Power the actuator to the full clockwise (CW) limit, to the 0°
reference position. Check position of ball and valve stem to
verify that valve is in the true 0° position, as required by the
application.
F. Repeat the above step for the 180° or full CCW position.
Verify that the driven device is in the required position.
G. Apply power to terminals 1 and 7 for AC (+ to 7 and - to 8
for DC) to verify proper operation of center-off switches.
With the actuator shaft positioned at the 180° position,
power applied to terminals 1 and 7 for AC (+ to 7 and - to
8 for DC) moves the actuator shaft clockwise (CW) to the
center-off position.
A. With the actuator placed with the cover removed and the
terminal strip facing the operator, switches #1 and #3 are
to the right and switches #2 and #4 are to the left of the
main shaft.
FCD WCAIM2074-00 180° Rotation, Center-Off Kit for 10-30 75 Electric Actuator 3
With the actuator shaft at the full clockwise position, 0°,
apply power to terminals 1 and 7 for AC (+ to 7 and - to 9
for DC). The actuator shaft should move counterclockwise
(CCW) to the center-off position.
Page 4
SPECIAL NOTE: If during any of these checks, the actuator
shaft stops other than at the required positions, a readjustment of the center-off cams is needed. At no time should
both center-off switches be activated by their cams at the
same time.
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.
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 actuation 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 actuation 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 centeroff cams, as noted in Step G.
IV. External switching and switch wiring for 75 DC actuators
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 actuator 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.
Using a three-pole, rotary switch, connect as follows:
Link Pole 1, Position 1 to Pole 2, Position 3; connect to actuator
terminal 1.
Flowserve Corporation has established industry leadership in the design and manufacture of its products. When properly selected, this Flowserve product is designed to perform
its intended function safely during its useful life. However, the purchaser or user of Flowserve products should be aware that Flowserve products might be used in numerous
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
Flowserve products. The purchaser/user should read and understand the Installation Operation Maintenance (IOM) instructions included with the product, and train its employees
and contractors in the safe use of Flowserve products in connection with the specific application.
While the information and specifications contained in this literature are believed to be accurate, they are supplied for informative purposes only and should not be considered
certified or as a guarantee of satisfactory results by reliance thereon. Nothing contained herein is to be construed as a warranty or guarantee, express or implied, regarding any
matter with respect to this product. Because Flowserve is continually improving and upgrading its product design, the specifications, dimensions and information contained herein
are subject to change without notice. Should any question arise concerning these provisions, the purchaser/user should contact Flowserve Corporation at any one of its worldwide
operations or offices.
For more information about Flowserve Corporation, visit www.flowserve.com or call USA 1-800-225-6989.
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
© 2004 Flowserve Corporation, Irving, Texas, USA. Flowserve is a registered trademark of Flowserve Corporation. FCD WCAIM2074-00 Printed in USA.
(Part IOM 19530)
Loading...