Limitorque L120 Series Maintenance and service guide

Installation & MaintenanceL120 Series 120-11000 Rev A
August 1998

Installation & MaintenanceL120 Series

WTR Series Disclaimer
L120 Installation & Maintenance Manual 120-11000 A
L120 Series Installation & Maintenance Manual
©1998 Copyright Limitorque Corporation. All rights reserved.
Printed in the United States of America.
Disclaimer
No part of this book shall be reproduced, stored in a retrieval system, or transmitted by any
means, electronic, mechanical, photocopying, recording, or otherwise without written
permission from Limitorque. While every precaution has been taken in the preparation of the
book, the publisher assumes no responsibility for errors or omissions. Neither is any liability
assumed for damages resulting from the use of the information contained herein.
This document is proprietary information of Limitorque Corporation furnished for
customer use ONLY. No other uses are authorized without written permission of Limitorque
Corporation.
Limitorque Corporation reserves the right to make changes, without notice, to this docu-
ment and the products it describes. Limitorque Corporation shall not be liable for technical
or editorial errors or omissions made herein; nor for incidental or consequential damages
resulting from the furnishing, performance or use of this document.
The choice of system components is the responsibility of the buyer, and how they are used
cannot be the liability of Limitorque Corporation. However, Limitorque’s sales team and
application engineers are always available to assist you in making your decision.
This manual contains information that is correct to the best of Limitorque’s knowledge. It
is intended to be a guide and should not be considered as a sole source of technical
instruction, replacing good technical judgment, since all possible situations cannot be antici-
pated. If there is any doubt as to exact installation, configuration, and/or use, call Limitorque
Corporation‚ at [phone].The latest revisions to this document are available online at
http://www.limitorque.com
IV

WTR Series
Contents
L120 Installation & Maintenance Manual 120-11000 A
Table of Contents
Introduction 1
Purpose 1
User Safety 1
Product Capabilities and Features 1
Initial Inspection and Storage Instructions 1
Product Identification 2
Inspection and Recording 3
Storage Procedures 3
ShortTerm Storage (less than 1 year) 3
Unit Weights 3
Installation and Instructions 4
Safety Precautions 4
Safety Practices 4
Prepare Initial Actuator 4
Mounting Base 4
Stem Acceptance 5
Torque Switch 5
SettingTorque Switch 5
BalancingTorque Switch 6
Geared Limit Switch 7
Setting Limit Switch 7
Setting Procedure 8
Combination of Contacts 9
Position Indication 9
Local Position Indicator 9
Remote Position Indicator 9
Optional Side-Mounted Handwheel 11
Operation 14
Electrical Start-Up 14
Manual Operation 17
Motor Operation 19
Torque and Travel Limiting 19
Maintenance 19
Lubrication 19
Lubrication Inspection 19
Factory Lubricant 20
Minimum Lubricant Qualities Required 20
Disassemble and Reassemble 21
Disassemble Unit Sizes L120-10, 20, and 40 21
Drive Sleeve and Housing Cover Disassembly 22
Torque Nut Disassembly (Drive 1 option) 22
Thrust Base Disassembly (Drive 2 Option) 23
Stem Nut Replacement -Thrust Base Applications 24
V

WTR Series Contents / Figures / Tables
L120 Installation & Maintenance Manual 120-11000 A
Reassembly 24
Declutch Assembly (L120-10) 25
Declutch Assembly (L120-20/40) 26
Install the Motor 26
How to Order Parts 26
Figures Figure 1 – L120-10 through 40 2
Figure 2 – Micro-Switch StyleTorque Switch and 600 VoltTorque Switch 6
Figure 3 – Limit Switch 7
Figure 4 - Setting the open and closed contacts 8
Figure 5 – 1000 ohm Potentiometer 10
Figure 6 – L120-10 dimensions and parts 11
Figure 7 – L120-20 dimensions and parts 12
Figure 8 – L120-40 dimensions and parts 13
Figure 9 – L120-10 through 40 typical wiring diagram 15, 16
Figure 10 – L120-10 through 40 unit, drive sleeve and housing parts breakdown 17, 18
Figure 11 – L120-10 through 40 standard and extended drive sleeve assembly 22
Figure 12 – L120-10 through 40 thrust base 23
Figure 13 – L120-10 through 40 declutch assembly parts beakdown 25
Tables Table 1 – Unit weights 3
Table 2 – Mounting Base Dimensions 4
Table 3 – Stem Acceptance 5
Table 4 – Lubricant Weights 20
VI

WTR Series
Introduction / Product Capabilities and Features
L120 Installation & Maintenance Manual 120-11000 A
Introduction
Purpose
This Instruction and Maintenance Manual explains how to install and maintain the L120-10
through 40 actuators. Information on installation, disassembly, lubrication, and parts infor-
mation is provided.
User Safety
Safety notices in this manual detail precautions the user must take to reduce the risk of
personal injury and damage to the equipment. The user must read and be familiar with these
instructions before attempting installation, operation, or maintenance. Failure to observe
these precautions could result in serious bodily injury, damage to the equipment, warranty
void, or operational difficulty.
Safety notices are presented in this manual in three forms:
aWARNING: Refers to personal safety. Alerts the user of potential danger. Failure to
follow warning notices could result in personal injury or death.
CAUTION: Directs the user’s attention to general precautions that if not followed could
result in personal injury and/or equipment damage.
NOTE: Highlights information critical to the user’s understanding of the actuator’s
installation and operation.
Product Capabilities and Features
L120 Series actuators operate without modification in any rising or non-rising stem applica-
tion for linear action valves.
The actuators meet rigid safety requirements. The actuators are available in weatherproof,
explosionproof, and submersible configurations.
The actuators are compatible with a wide range of control options from stand-alone units
with local pushbutton to open standards-based DDC-100 networks with up to 250 actuators.
The actuators are designed with integral control packages including plug-in interconnect
boards that increase control functionality for stand-alone or networked units.
Durable torque overload is provided in both directions of travel.
Initial Inspection and Storage Instructions
aWARNING: Read this Installation and Maintenance Manual carefully and
completely before attempting to store the actuator. Be aware of the electrical hazards.
1

WTR Series Product Capabilities and Features
L120 Installation & Maintenance Manual 120-11000 A
Product Identification
The actuator unit nameplate is located on the back of the unit opposite the limit switch
compartment.The nameplate contains the following information:
• Limitorque name
• Point of Manufacture
• Unit Size
• Order Number
• Serial Number
• CustomerTagging
• CE Stamp
The motor nameplate is located on the motor. The nameplate contains the following
information:
• ID Number • StartTorque
• RunTorque • Enclosure Type
• RPM • Volts
• Full Load Amps • Locked Rotor Amps
• Insulation Class • Duty
• Space Heater Size • Horsepower
• Service Factor • Phase
• Cycles • Motor Code
• AmbientTemperature • Connection Diagram
Figure 1 – L120-10 through 40
2
Motor
Controls
Compartment
Electrical
Compartment
Housing
Declutch
Lever
Handwheel
Actuator Nameplate
(hidden)

WTR Series
Product Capabilities and Features / UnitWeights
L120 Installation & Maintenance Manual 120-11000 A
Inspection and Recording
Upon receipt of the actuator, inspect the condition of the equipment and record nameplate
information as follows:
1. Carefully remove actuator from shipping carton or skid.Thoroughly examine the
equipment for any physical damage that may have occurred during shipment. If
damaged, immediately report the damage to the transport company.
2. Record the unit nameplate information for future reference; i.e. ordering parts,
obtaining further information.
Storage Procedures
NOTE: The following are our recommended storage procedures to retain maximum product
integrity during short-term storage. Failure to comply with recommended procedures will
void the warranty. For longer-term storage, contact Limitorque for procedures and
recommendations.
Short-Term Storage (less than 1 year)
Units are not weatherproof until properly installed on the valve or prepared for storage.
Store units in a clean, dry, protected warehouse from excessive vibration and rapid temper-
ature changes. If the units must be stored outside, they must be stored off the ground, high
enough to prevent them from being immersed in water or buried by snow.
1. Position the actuator in storage with motor and switch compartment horizontal.
2. Connect the internal heaters (if supplied) or place desiccant in the switch compartment.
3. Replace all plastic caps or plugs with pipe plugs and ensure that all covers are tight.
4. If the actuator is mounted on a valve and the stem protrudes from the unit, a suitable stem
cover must be provided.
Unit Weights
The approximate L120 actuator weights are provided below:
Table 1 – Unit weights
Unit Size Control Types Drive 1 weight (lbs/kg) Drive 2 Weight (lbs/kg)
Top HW Side HW Top HW Side HW
lbs kg lbs kg lbs kg lbs kg
L120-10 NCU 100 45 112 51 107 49 119 54
BIC 115 52 127 58 122 55 134 61
UEC/CLAMSHELL 140 64 152 69 147 67 159 72
L120-20 NCU 140 64 158 72 153 69 171 78
BIC 155 70 173 78 168 76 186 84
UEC/CLAMSHELL 180 82 198 90 193 88 211 96
L120-40 NCU 190 86 216 98 212 96 238 108
BIC 205 93 231 105 227 103 253 115
UEC/CLAMSHELL 230 105 256 116 252 114 278 126
3

WTR Series Installation Instructions
L120 Installation & Maintenance Manual 120-11000 A
Installation Instructions
Safety Precautions
aWARNING: Read this Installation and Maintenance Manual carefully and
completely before attempting to install, operate, or troubleshoot the Limitorque
L120 actuator.
aWARNING: Be aware of electrical hazards. Turn off incoming power before working
on the actuator and before opening switch compartment.
aWARNING: Potential HIGH-PRESSURE vessel – Be aware of high-pressure hazards
associated with the attached valve or other actuated device when installing or
performing maintenance on your L120 actuator. Do not remove the actuator
mounting bolts when the actuator is mounted on a rising stem valve unless the valve
is in the FULLY OPEN position and there is NO pressure in the line.
aWARNING: Do not manually operate the actuator with devices other than installed
Handwheel and Declutch Lever. Using force beyond the ratings of the unit and/or
using additive force devices such as cheater bars, wheel wrenches, pipe wrenches or
other devices on the actuator Handwheel or Declutch Lever may cause serious
personal injury and/or damage to the actuator or valve.
aWARNING: Do not work on actuator while it is mounted on a torque-seated valve.
Safety Practices
The following check points should be performed to maintain safe operation of the L120
actuator.
• Mount motors on a horizontal plane, if possible.
• Keep the switch compartment clean and dry.
• Keep the valve stem clean and lubricated.
• Set up periodic operating schedule for infrequently used valves.
• Verify all unit wiring is in accordance with the applicable wiring diagram.
•Carefully check for correct motor rotation direction. If the motor is driving the valve in
the wrong direction, interchange any two leads on three-phase motors or switch the
armature leads on D.C. and single-phase motors.
• Use a protective stem cover. Check valve stem travel and clearance before mounting
covers on rising stem valves.
Prepare Initial Actuator
Replace all molded plastic conduit and top protectors (installed for shipping purposes only)
with pipe plugs when installation wiring is complete.
Mounting Base
The mounting hole sizes and quantities are as detailed inTable 2.
Table 2 – Mounting Base Dimensions
Mounting Holes Tap size
Unit Size Quantity MSS ISO
L120-10 4 3/8-16x0.88 M10x1.5x22.4
L120-20 4 5/8-11x1.25 M16x2x32
L120-40 4 5/8-11x1.25 M16x2x32
4

WTR Series
Installation Instructions
L120 Installation & Maintenance Manual 120-11000 A
Stem Acceptance
The maximum stem acceptance is provided in Table 3.
Table 3 – Stem Acceptance
Maximum stem acceptance
Drive 2 Drive 1 Drive 1
Tapped Bore Key
Unit size inch mm inch mm inch mm
L120-10 1.25 32 1.00 25 1/4x3/32 8x6
L120-20 2.25 57 1.875 47 1/2x3/16 14x9
L120-40 2.625 66 2.125 52 1/2x3/16 16x10
Torque Switch
The torque switch is designed to protect the actuator in open and close directions.
CAUTION: Disconnect all incoming power before opening limit switch compartment
or working on the torque switch.
• Do not use abrasive cloth to clean the contacts on the torque switch.
• Do not torque seat 90° operation valves nor run them against the stops. This may
cause damage to the valve.
NOTE: If the actuator has "torqued out," release torque buildup by operating the unit
manually.
Setting Torque Switch
The torque switch was set at the factory according to customer-supplied information
regarding necessary torque or thrust output that was provided at the time of the order.
However, if the torque switch needs to be installed or the setting needs to be adjusted follow
the procedure below:
CAUTION: A maximum stop setting plate is provided on most units. Do not remove
this plate. Do not exceed the setting indicated by this plate without contacting
Limitorque.
• Installing or adjusting the torque switch with the operator on a loaded condition will
result in a loss of torque protection.
Item letters correspond to Figure 2.
1. Place the L120 actuator in manual mode.
2. Release the load on the wormshaft spring pack.
3. For open and close directions, loosen Screw (A) and move Pointer (B) to desired position.
A higher number indicates a high torque and/or thrust output.
4.Tighten Screw (A).
5. Operate the valve electrically to seat valve and to ensure tight shut-off.
6. Re-balance torque switch if required. (see page 6)
5

WTR Series Installation Instructions
L120 Installation & Maintenance Manual 120-11000 A
Figure 2 – Micro-Switch StyleTorque Switch and 600 Volt Torque Switch
Balancing Torque Switch
Item letters correspond to Figure 2.
1. Place the actuator in manual mode.
2. Remove the load from the wormshaft spring pack.
3. Note the open and close torque switch settings prior to re-installing the torque switch.
4. Loosen screws (A) and position both pointers (B) at the #1 setting, tighten screw (A). In
this position the index marks should be aligned.
5. Loosen balancing screws and install the torque switch.The base of the torque switch
should be flush against the compartment and the hole for the mounting screw should be
aligned.
6. Install the mounting screw.
7.Tighten the balancing screws.
CAUTION: The balancing screws should not be touched except during the balancing
procedure.
The switch is now balanced and ready for the pointers to be returned to their original
settings.
6
Mounting
Screw
Index Marks
Maximum Stop
Setting Plate A
B
Balancing
Screws
600 Volt Torque Switch
AB
BA
BA
Micro-Switch Style Torque Switch
Mounting
Screw
Index Marks
Maximum Stop
Setting Plate
Balancing
Screws
OPEN
-10-20
-10-20
CLOSE

WTR Series
Installation Instructions
L120 Installation & Maintenance Manual 120-11000 A
Geared Limit Switch
CAUTION: The geared limit switch is not preset at the factory and must be adjusted
after the actuator has been mounted on associated equipment.
• Disconnect all incoming power to the actuator prior to opening the limit switch
compartment and adjusting the switch.
• Consult the relevant wiring diagram for limit switch contact development. All L120
units are supplied with 16-contact limit switches - 4 switches on each of the 4 rotors.
Two rotors are used for end of travel indication. The remaining two rotors may be
adjusted for any intermediate point of travel.
• Do not use abrasive cloth to clean the contacts on the limit switch.
• Do not attempt to repair gearing in the limit switch. Replace entire gear frame
assembly if necessary.
Setting Limit Switch
NOTE: The standard 16-contact, 4-gear, limit switch is capable of counting up to 740 drive
sleeve turns depending on the actuator unit size.The Intermediate Shaft (B), shown in Figure
3, may take a considerable number of turns before rotor trip occurs.
aWARNING: Potential Explosion Hazard. Do not use a variable speed electric drill for
setting the limit switch in an explosive environment.
CAUTION: When setting the limit switch rotor segments (cams) using a variable speed
electric drill, do not run drill at speeds higher than 200 RPM. Operating the drill at
high speeds can damage the gearing within the limit switch.
Set the limit switch as follows. All item letters and piece numbers refer to Figure 3.
Figure 3 – Limit Switch
7
12
9
3
4
B
A
6
5
7
8
Limit Switch
Piece Quantity Description
1 1 Gear Frame Assembly
2 2 8-Switch Contact Block Assy.
3 12 Rotor Segment (short)
4 4 Rotor Shaft
5 4 Machine Screw
6 4 Flat Washer
7 4 Lock Washer
8 8 Hex Nut
9 4 Rotor Segments (long)

WTR Series Installation Instructions
L120 Installation & Maintenance Manual 120-11000 A
Setting Procedure
1. Open the Compartment Cover (piece #200 of Figure 9).
2. Put the actuator into manual operation. Use the handwheel to operate the valve in the
“open” direction. While operating the valve, note the direction of the Intermediate Shaft
(B) corresponding to the rotor or rotors to be set.
3. When the valve is fully open, close it one turn of the handwheel to allow for coast of
moving parts.
4. Push in the Setting Rod (A) and turn one-quarter turn.The rod will latch in this
depressed position.
5. Refer to the applicable wiring diagram for contact development.The limit switch contact
is closed when the rotor is engaged with the plunger. If the rotor to be set has not turned
90 degrees to operate the plunger, turn the intermediate shaft in the same direction as
noted in Step No. 2 until the rotor clearly trips the switches.This rotor is now set
correctly.
6. Before moving the valve, depress and turn the Setting Rod (A) one-quarter turn to the
spring released position. Insert a screwdriver into the intermediate shafts to ensure that
they will not move.
CAUTION: Do not operate the valve when Setting Rod (A) is in a fully depressed
position. Loss of contact setting will occur and the setting rod will be damaged.
7. Operate the valve by handwheel to fully “close” position; reverse direction by one turn of
the handwheel to allow for coast of moving parts.
8. Set the other rotors by following Steps No. 4 through 6.
Figure 4 – Setting the open and closed contacts
8
Closed
position Open
position

WTR Series
Installation Instructions
L120 Installation & Maintenance Manual 120-11000 A
Combination of Contacts
The rotor segments can be separated and rotated through 90 degrees to give various
combinations of normally open or normally closed contacts to each rotor.
1. Remove Nuts (piece #8) and Fillister Head Machine Screws (piece #5, for a total of 2
fasteners on each side of the switch).
2. Remove complete contact assembly from the back plate.
3. Rearrange cams on the camshaft to produce the required combination of contacts.
4. Replace contact assembly on back-plate (ensuring that the registers fit correctly) and secure
with the machine screw and nuts.
5. Set limits according to the procedure above.
Position Indication
Local position indication
The local dial position indicator is factory-selected to show valve position.The position
indicator can only be adjusted when mounted on the valve.
To set the local position indicator:
1. Disconnect all incoming power and remove Switch Compartment Cover (piece #200
of Figure 9).
2. Place the valve in the fully “close” position.
3. Loosen the round head machine screw which holds the pointer in place, move the pointer
to the “O” position, and re-tighten the screw.
The indicator is now set.
NOTE:The end-of-travel rotors of the geared limit switch activate “Flip-flop” type indicators.
This type of indicator will require no further setting after the geared limit switch has been adjusted.
Remote Position Indication
The L120 actuator with a position transmitter (PT20SD) installed, transmits a 4-20mA
output signal to a remote position indicator.The PT20SD responds to input of IK (ohms)
potentiometer and can be powered by 18VAC or 24VDC. For more information on this
transmitter, see 440-30001.
NOTE: The pinion has been left disengaged to prevent damaging of rheostat prior to
setting the valve. Set rheostat by turning pinion until the desired reading is obtained. Loosen
the hex nut on the back of the rheostat and slide the rheostat in the direction of the idler
pinion until pinions are engaged. Do not force engagement of the pinions. Re-tighten hex
nut on back of the rheostat. Do not engage pinion until unit and valve have been set.
9

WTR Series Installation Instructions
L120 Installation & Maintenance Manual 120-11000 A
To Calibrate Position Transmitter PT20SD
1. Position the actuator to mid-travel; valve at 50% position.
2. Disconnect the potentiometer wiring harness from the PT20SD board and measure the
resistance from each end connection to the center connection on the potentiometer.
3. Set the potentiometer to the correct resistance reading. Loosen the set screw that retains
the spur gear on the potentiometer shaft and rotate the shaft until a reading of 500 ohms
is achieved.
4.Tighten the set screw and re-connect the wiring harness to the PT20SD.
5. Run the actuator fully CLOSED.
6. Calibrate ZERO position by adjusting the zero potentiometer until a 4mA ouput signal is
read at terminal +VE and -VE.
7. Run the actuator fully OPEN.
8. Calibrate SPAN position by adjusting the span potentiometer until a 20mA output signal
is read at terminals +VE and -VE.
9. Repeat steps 5 to 8 and fine-tune as necessary.
Figure 5 – 1000 ohm Potentiometer
10
DC Power
Supply
-
+
-
+
Receiver
Gearing
1000 OHMS
Customer Equipment
Typical Connection for a 1000 ohm Potentiometer

WTR Series
Installation Instructions
L120 Installation & Maintenance Manual 120-11000 A
Optional Sided-Mounted Handwheel
For unit sizes L120-10, 20, and 40, the handwheel can be mounted on the side as shown in
the following figures.
Figure 6 – L120-10 parts list, attachment ratio 4.2:1
11
Piece Quantity Description
6 1 Housing Cover Shim
42-11 1 O - Ring
44 1 Quad Ring
45 1 Pipe Plug
150 1 Bevel Housing
151 1 Bevel Housing Adapter
152 1 Bearing Cap
153 1 Bevel Gear
154 1 Bevel Pinion Shaft
157-1 4 Hex Head Cap Screw
157-2 4 Lockwasher
157-3 2 Soc Head Cap Screw
157-4 1 Roll Pin
157-5 2 Socket Head Cap Screw
157-6 2 Lockwasher
158-1 1 Quad - Ring
158-2 1 O - Ring
158-3 1 O - Ring
158-4 1 Quad - Ring
160 2 Ball Bearing
161 1 Seal Insert
164 1 Spacer
169 1 Retaining Ring
171 1 Grease Fitting
177 1 Handwheel
178 1 Hex. Head Cap Screw
179 1 Lockwasher
180 1 Key
181 1 Retaining Washer
182-1 1 Handwheel Spinner
182-2 1 Sock. Head Cap Screw
182-3 1 Hex. Jam Nut
157-1
&
157-2
150158-2 151
45 153 642-11
144
158-4
164 Note: Apply Loctite 601/609
to ID of Bearing Cap
152
169
161
158-1
158-3
160
171
182-2
182-1
182-3
179 178 181 180
154
157-4
157-3
&
157-6
157-5

WTR Series Installation Instructions
L120 Installation & Maintenance Manual 120-11000 A12
Figure 7 – L120-20 with side-mounted handwheel and parts list, attachment ratio 5.7:1
154
150 151
45
153 642-11
158-4
158-2
Note: Apply Loctite 601/609
to ID of Bearing Cap
152
169
161
158-1
158-3 160
171
44
182-2
182-1
182-3
179
&
178 181 180
157-5
157-3
&
157-4
157-6
177
157-1
&
157-2
Piece Quantity Description
6 1 Housing Cover Shim
42-11 1 O - Ring
44 1 Quad Ring
45 1 Pipe Plug
150 1 Bevel Housing
151 1 Bevel Housing Adapter
152 1 Bearing Cap
153 1 Bevel Gear
154 1 Bevel Pinion Shaft
157-1 4 Hex Head Cap Screw
157-2 4 Lockwasher
157-3 2 Hex Head Cap Screw
157-4 1 Lockwasher
157-5 2 Roll Pin
157-6 2 Socket Head Cap Screw
158-1 1 Quad - Ring
158-2 1 O - Ring
158-3 1 O - Ring
158-4 1 Quad - Ring
160 2 Ball Bearing
161 1 Seal Insert
164 1 Spacer
169 1 Retaining Ring
171 1 Grease Fitting
177 1 Handwheel
178 1 Hex. Head Cap Screw
179 1 Lockwasher
180 1 Key
181 1 Retaining Washer
182-1 1 Handwheel Spinner
182-2 1 Sock. Head Cap Screw
182-3 1 Hex. Jam Nut

WTR Series
Installation Instructions
L120 Installation & Maintenance Manual 120-11000 A
Figure 8 – L120-40 with side-mounted handwheel and parts list, attachment ratio 12:1
13
Handwheel Ratio 12:1
182-2
182-1
182-3
179
&
178 181 180
157-3
&
157-4
157-7
155
163
164
Note: Apply Loctite
601/609 to ID of
Bearing Cap
169
161
158-1
159
177
167
160
164
Sect. Thru Pinion
154
157-5
157-1
&
157-2
158-2
150 44
642-11
45
156
153
158-4
171
171
157-6 152
158-3
151
Piece Quantity Description
6 1 Housing Cover Shim
42-11 1 O - Ring
44 1 Quad Ring
45 1 Pipe Plug
150 1 Bevel Housing Cover
151 1 Bevel Housing
152 1 Spur Gear Cover
153 1 Bevel Gear
154 1 Bevel Pinion
155 1 Input Pinion Shaft
156 1 Bevel Gear Adapter
157-1 4 Hex Head Cap Screw
157-2 4 Lockwasher
157-3 4 Hex Head Cap Screw
157-4 4 Dowel Pin
157-5 8 Socket Head Cap Screw
157-6 2 Lockwasher
158-1 1 Quad - Ring
158-2 1 O - Ring
158-3 1 Gasket
158-4 1 Quad - Ring
158-7 1 Socket Head Cap Screw
159 1 Spur Gear
160 1 Ball Bearing
161 1 Seal Insert
163 1 Ball Bearing
164 2 Ball Bearing
167 1 Key
169 1 Retaining Ring
171 1 Grease Fitting
177 1 Handwheel
178 1 Hex. Head Cap Screw
179 1 Lockwasher
180 1 Key
181 1 Retaining Washer
182-1 1 Handwheel Spinner
182-2 1 Sock. Head Cap Screw
182-3 1 Hex. Jam Nut

WTR Series Operation
L120 Installation & Maintenance Manual 120-11000 A
Operation
aWARNING: Do not manually operate the actuator with devices other than installed
Handwheel and Declutch Lever. Using force beyond the ratings of the unit and/or
using additive force devices such as cheater bars, wheel wrenches, pipe wrenches or
other devices on the actuator Handwheel or Declutch Lever may cause serious
personal injury and /or damage to the actuator or valve.
CAUTION: Do not motor operate the valve without first setting or checking the
limit switch setting and motor direction.
• Do not force the declutch lever into hand operation. If the clutch does not easily
engage, rotate handwheel slowly while operating the declutch lever.
• Do not alternately start/stop the motor to open or close a valve which is too tight
for normal operation.
Electrical Start-Up
1. Verify that the actuator has been correctly lubricated.This is particularly important if the
actuator has been in long-term storage.
2. Verify that the geared limit switch has been correctly set (see section entitled Setting Limit
Switch, page 7).
3. If the valve stem is not visible, remove the stem cover or handwheel cover plate to observe
output direction of the drive sleeve.
4. Engage manual operation and hand crank the valve well away from end of travel positions.
5.Turn on power supply and push button to "open."
6. Check output rotation:
• If phase rotation is correct, the valve should begin to open.
• If valve begins to CLOSE, STOP Immediately. Incorrect phase rotation will lead to
serious damage if the valve seats.
7. Correct the phase rotation one of two ways:
• Switch any two of the three power leads for three-phase power, or
• reverse the armature leads for single-phase or dc power.
The actuator should operate correctly and will be stopped at the end of travel positions by
torque or limit switch functions.
Figure 9 is a representation of a typical application and may not be applicable to your
specific actuator. Please refer to the wiring diagram supplied with your actuator to confirm
the actual equipment supplied.
14

Operation
L120 Installation & Maintenance Manual 120-11000 A
WTR Series
15
Figure 9 (one of two) – L120-10 through 40 typical wiring diagram
MOTOR
7
3
(7) (7C)
(3) (3C)
R
G
(18) (18C)
(17) (17C)
(5) (5C)
(1) (1C)
PB1
OPEN
PB2
STOP
PB3
CLOSE
(8) (8C)
8
1
1
LOCAL REMOTE
O
C
O
C
O
C
C
C
C
O
O
O
T
T2
T3
L1
L2
L3
4 1
5
(4) (4C)
TH.OL
SS
OFF
ELEC HTR
MTR
JUMPER
SEE NOTE#5
18
OPEN
STOP
4
2CLOSE
3
COMMON
YELLOW
RED
YELLOW
BLUE
YELLOW
BROWN
ORANGE
BLUE
WHITE
YELLOW
WHITE
BROWN
YELLOW
BLACK
BLUE
BLACK P1
P1
BROWN
RED
RED
RED
WHITE
BLUE
RED
P1
PURPLE
BLACK
BLACK
POT
(OPTIONAL)
1716
1
BLACK
BROWN
RED
11
12
13
GREEN
BLACK
P2
H2
H1
6
5
REMOTE IND
GRAY
PINK
GRAY
REMOTE IND
21/22
BLACK
BLACK
GND 10
GREEN/WHITE
GREEN/WHITE GREEN/WHITE
19/20
WHITE
RED
230V500 H1 AND H3
TO L1
H2 AND H4
TO L2
480
460
415
380
1
A
B
E
D
E
ALTERNATE
TRANSFORMER TYPES
600
575
550
-
-
32
TAPS
CPT
18V
115V
RED
WHITE
BLU
FUSE
FUSE
ABC D E
FUSE
BLUE BLUE
BLACK
L1F L2F
WHITE
RES
RES
18V
YEL
YEL
BLU
BY-PASS CIR
IND LIGHT
OPEN LIMIT
BY-PASS CIR
IND LIGHT
CLOSE LIMIT
SPARE
SPARE
SPARE
SPARE
SPARE
SPARE
SPARE
SPARE
FULLY
OPEN A B FULLY
CLOSED
Valve Shown Full Open Position
SPARE
SPARE
LIMIT SWITCH CONTACT DEVELOPMENT
VALVE POSITION
ROTOR
OPEN
CLOSE
INT.1
INT.2
FUNCTION
1
2
3
4
5
6
7
8
9
10
1
12
13
14
15
16
CONTACT
A B
OPENING TORQUE SWITCH INTERRUPTS
CONTROL CIRCUIT IF MECHANICAL
OVERLOADOCCURSDURINGOPENINGCYCLE
CLOSING TORQUE SWITCH INTERRUPTS
CONTROL CIRCUIT IF MECHANICAL
OVERLOAD OCCURS DURING CLOSING
CYCLE
18
17
5. ADD JUMPER ON LS#8 BETWEEN TERMINALS (8)
Notes
3. SEE CERTIFICATION SHEET FOR VOLTAGE SUPPLIED.
2.
1. CLOSE CONTACT
OPEN CONTACT
RANSFORMER UNUSED WIRES TO BE SEPARATELY
COVERED WITH INSULATING HEAT SHRINK TUBING.
4. ROTORS INT.1 & INT.2 CAN BE SET AT VALVE
POSITION FULL OPEN, FULL CLOSED OR ANY
POSITION IN BETWEEN AS INDICATED BY
POINTS A AND B.
& (8C) FOR TORQUE SEATING VALVES.
O
C
R
G
O-OPEN CONTACT
C-CLOSE CONTACT
CPT-CONTROL POWER TRANSFORMER
+-MECHANICAL INTERLOCK
TH.OL-THERMAL OVERLOAD CONTACTS
SS-SELECTOR SWITCH
(LOCAL-OFF-REMOTE)
PB1-OPEN PUSHBUTTON
PB2-STOP PUSHBUTTON
PB3-CLOSE PUSHBUTTON
ELEC HTR-COMPARTMENT HEATER
MTR HTR-MOTOR HEATER
POT-POTENTIOMETER (OPTIONAL, SEE
CERTIFICATION SHEET IF SUPPLIED)
RES-LAMP RESISTORS˛
RED INDICATING LIGHT
GREEN INDICATING LIGHT
OPENING COIL
CLOSING COIL
Legend