VALVCON
LCU-SERIES
OPTION “S2”
ADDITIONAL LIMIT SWITCHES
Installation, Maintenance and
Operating Instructions
IMO-I1478 • 4/2013
Table of Contents
1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Applicability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 PARTS LIST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3 TOOLS REQUIRED . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
4 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 IMO-I1478
READ THESE INSTRUCTIONS FIRST!
These instructions provide information about safe handling and operation of the actuator.
If you require additional assistance, please contact the manufacturer or manufacturer's representative.
Addresses and phone numbers are printed on the back cover.
See also www.metso.com/valvcon for the latest documentation.
SAVE THESE INSTRUCTIONS!
Subject to change without notice.
All trademarks are property of their respective owners.
IMO-I1478 3
1 GENERAL
1.1 Description
The LCU-Series Limit Switch Kit adds two additional limit
switches to an actuator. Standard actuators are shipped
from the factory with two limit switches installed—one to
control the end of travel in the fully open position and one
to control the end of travel in the fully closed position. Two
additional limit switches may be installed to provide contact closure at any actuator position.
1.2 Applicability
This Limit Switch Kit is intended for use with any LCUSeries Electric Actuator.
2 PARTS LIST
2 Limit Switches
2 Cams
2 #4-40 x 2.25" screws
2 Limit Switch Wiring Harnesses
2 Wire Ties
4 #6 x .090" spacers
2 #6 x .150" spacers
2 .090" Cam spacers 3/8" ID, 17/32" OD
1 Cam Shaft Support Bracket
3 TOOLS REQUIRED
Medium Phillips Screwdriver
Small flat blade Screwdriver
3/32" Hex Wrench
4 INSTALLATION
A. Remove Actuator Cover
Remove the actuator cover by removing the screws
securing the cover to the base.
B. Install the Limit Switches, Cams and Cam Shaft
Support Bracket
Remove the Limit Switch screws, which secure the existing Limit Switches in place, retaining the spacers
between the existing two limit switches.
Replace Limit Switch screws with the #4-40 X 2.25" Screws,
(provided) ; refer to Figure 1 for proper switch, spacer,
cam and cam shaft support bracket orientation.
C. Install Wiring Assembly
1. Attach the faston end of the White Wire to the Common (COM) connector on the Limit Switch. Connect
the stripped end of the White Wire to terminal number 8 on the terminal strip.
2. Attach the faston end of the Black Wire to the Normally Open (NO) connector on the Limit Switch. Connect
the stripped end of the Black Wire to terminal number
9 on the terminal strip.
3. Attach the faston end of the Red Wire to the Normally
Closed (NC) connector on the Limit Switch. Connect
the stripped end of the Red Wire to terminal number 7
on the terminal strip.
4. Using the supplied Wire Tie, secure the Limit Switch
wires to avoid contact with any moving parts.
D. Install Cam
1. Slide the additional Cam down the actuator cam shaft
on top of the existing Cams.
2. Drive the actuator to the desired trip point.
3. Rotate the cam counterclockwise until the limit switch
lever passes through one of the flats on the cam and
operates the limit switch (pushes the lever in). Now
rotate the cam clockwise until the limit switch just
clicks open.
4. Re-tighten the set screw in the limit switch cam. (Do
not over-tighten the screws, use less than 8 in/lbs of
tightening torque)
5. Operate the actuator to verify proper setting of the
Cam.
Figure 1 Parts Identification
CAUTION:
Dangerous voltages are present inside the actuator cover unless
the power supply to the actuator has been shut off or disconnected. Use extreme caution whenever working on the actuator with
the cover removed.
Cam Shaft
Support Bracket
Cam Shaft Support Bracket Bearing
(Factory Installed)
Cams
0.90" Cam Spacers
#4-40 x 2.25"
#6 x 0.150" Spacers
Limit Switches
and Harnesses
#6 x 0.90" Spacers
4 IMO-I1478
Metso Automation Inc.
Europe, Vanha Porvoontie 229, P.O. Box 304, FI-01301 Vantaa, Finland, Tel. +358 20 483 150, fax +358 20 483 151
North America, 44 Bowditch Drive, P.O.Box 8044,Shrewsbury,Massachusetts, 01545-8044 USA. Tel. int. +1 508 595 5083. Fax int.+1 508 595 5183
www.metso.com/valvcon
Subject to change without prior notice.
Figure 2 LCU-Series AC Wiring
Figure 3 LCU-Series DC Wiring
E. Replace Actuator Cover
NOTE: When reinstalling the cover, follow the normal
practice of tightening the cover screws in a cross pattern
to insure that the cover is pulled down flat without overstressing a corner.
AC NEUTRAL/L1
AC HOT, OPT. HEATER/L2
AC HOT, 0 & 180 CONTROL
AC HOT, 90 & 270 CONTROL
0 & 180 INDICATION
90 & 270 INDICATION
NC
AUX. LIMIT SWITCH COM
NO
NC
AUX. LIMIT SWITCH COM
NO
DC NEGATIVE
DC POSITIVE, OPT. HEATER
DC POSITIVE, 0 & 180 CONTROL
DC POSITIVE, 90 & 270 CONTROL
0 & 180 INDICATION
90 & 270 INDICATION
NC
AUX. LIMIT SWITCH COM
NO
NC
AUX. LIMIT SWITCH COM
NO
TERMINAL
STRIP
BLK
1
2
WHT
3
WHT
4
RED
5
RED
6
RED
7
WHT
8
BLK
9
RED
10
WHT
11
BLK
12
TERMINAL
STRIP
1
2
3
4
5
6
7
8
9
10
11
12
BLK
WHT
WHT
RED
RED
RED
WHT
BLK
RED
WHT
BLK
COM
COM
COM
COM
COM
COM
COM
COM
NO BLK
NC
NO BLK
NC
NC
NO
NC
NO
NO BLK
NC
NO BLK
NC
NC
NO
NC
NO
MOTOR
MOTOR
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