Flowserve 180 Rotation Center-Off Kit - Manual (Page 3)

Flow Control
Worcester Actuation Systems
FCD WCAIM2074-00 180° Rotation, Center-Off Kit for 10-30 75 Electric Actuator 3
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 con-
nected, 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 con-
nected (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
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.
B. For 10-23 75 Actuators:
Place the cam spacer, cam #3, cam spacer, and cam #4 over
the shaft.
a CAUTION: Do not bend the limit switch levers.
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.
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.