Flowserve Limitorque LTQ0 3 Series User manual

Read these instructions prior to installing, operating, and
maintaining this equipment.
LTQ0x3 – LTQ0x4 Series
Installation
Operation
Maintenance
Compact Quarter-turn Electric Actuator
AIIOM000166-00 EN 20

LTQ0x3 – LTQ0x4 Series User Instructions – AIIOM000166 EN
Copyright
All rights reserved. No part of these instructions may be reproduced, stored in a retrieval
system, or transmitted in any form or by any means without prior permission of Flowserve
Corporation.
Document Version
Initial Release, 04-30-2020

LTQ0x3 – LTQ0x4 Series User Instructions – AIIOM000166 EN
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TABLE OF CONTENTS
1 General Information ..................................................................................................................... 4
1.1 Scope of Manual ................................................................................................................................................4
1.2 Disclaimer ............................................................................................................................................................4
1.3 Operational Concepts ......................................................................................................................................4
2 Safety Information ........................................................................................................................ 6
2.1 Safety Symbols and Descriptions ......................................................................................................................6
2.2 Intended Use .......................................................................................................................................................7
2.3 General Hazard Sources ...................................................................................................................................7
2.4 Qualified Personnel and Targeted Group .......................................................................................................8
3 Product Description ...................................................................................................................... 9
3.1 General Product Description ............................................................................................................................9
3.2 Rotation of Components .................................................................................................................................10
4 Installation ................................................................................................................................... 10
4.1 Mounting ...........................................................................................................................................................10
4.2 Installation .........................................................................................................................................................11
5 Theory of Operation ................................................................................................................... 12
5.1 NCU On/Off Control .........................................................................................................................................12
5.2 NCU Proportional Control ................................................................................................................................13
5.3 Control Station On/Off Controls .....................................................................................................................14
5.4 Control Station Proportional Controls ............................................................................................................15
5.5 LK series LCS Operation ...................................................................................................................................16
5.6 LB series LCS Operation ...................................................................................................................................17
6 Battery Backup ........................................................................................................................... 18
6.1 Battery Identification .......................................................................................................................................18
6.2 120/230V Transformer Mounting and Setup ..................................................................................................19
7 Adjustments ................................................................................................................................ 20
7.1 Auxiliary Switch Cam Mapping ......................................................................................................................21
7.2 Adjusting End-of-Travel Cams .........................................................................................................................22
7.3 Adjusting Auxiliary Switch Cams .....................................................................................................................23
7.4 Proportional Control Setup ..............................................................................................................................24
7.5 Manual Override ..............................................................................................................................................25
8 Commissioning ........................................................................................................................... 25
8.1 On/Off Control ..................................................................................................................................................26
8.2 Proportional Control .........................................................................................................................................26
8.3 LK/LB On/Off Controls ......................................................................................................................................27
8.4 Battery Backup On/Off Control ......................................................................................................................28
9 Calibration Procedures .............................................................................................................. 29
9.1 Calibration ........................................................................................................................................................29

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9.2 On/Off Control ..................................................................................................................................................29
9.3 Proportional Control for 120 – 230 VAC Models ...........................................................................................29
9.4 Proportional Control for 12 – 24 VAC/VDC Models ......................................................................................32
9.5 Calibration Procedure for On/Off with Battery Backup ..............................................................................34
10 Troubleshooting .......................................................................................................................... 36
11 Technical Data............................................................................................................................ 39
11.1 Nameplate ......................................................................................................................................................39
11.2 Torque Requirements .....................................................................................................................................40
11.3 Wire Sizing ........................................................................................................................................................41
11.4 LTQ 0H3/4 Exploded View .............................................................................................................................42
11.5 LTQ 0H3/4 LK/LB Exploded View ...................................................................................................................43
Annex A: Glossary ............................................................................................................................. 44

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1 General Information
1.1 Scope of Manual
These instructions must be kept close to the product’s operating location or directly with the product.
Read these instructions prior to installing, operating, using, or maintaining the equipment in any region
worldwide. Do not put this equipment into service until meeting each of the safe operating conditions noted in
the instructions. Failure to comply with the information provided in this User Instructions manual is considered to
be misuse. The Flowserve warranty does not cover personal injury, product damage, delay in operation, or
product failure caused by misuse.
These instructions aim to familiarize the reader with the product and its permitted use. Operating the product in
compliance with these instructions is imperative to ensure reliability in service and to avoid risks. These instructions
may not account for all local regulations; ensure the observance of such regulations by all, especially those
installing the product. Always coordinate repair activities with operations personnel, and follow all plant safety
requirements, applicable safety, and health legislation. For more information on a specific product, refer to the
IOM for that product.
1.2 Disclaimer
Information in this User Instruction supplement is believed to be complete and reliable. Despite all Flowserve’s
efforts to provide comprehensive information and instructions, sound engineering and safety practices should
always be used. Always consult with a qualified engineer.
Flowserve manufactures products to applicable International Quality Management System Standards as
certified and audited by external Quality Assurance organizations. Genuine parts and accessories have been
designed, tested, and incorporated into the products to help ensure continued product quality and
performance in use. As Flowserve cannot test parts and accessories sourced from other vendors, the incorrect
incorporation of such parts and accessories may adversely affect the performance and safety features of the
product. Flowserve considers the failure to properly select, install, or use authorized Flowserve parts as misuse.
The Flowserve warranty does not cover any damage or failure caused by misuse. Moreover, any modification
of Flowserve products, or removal of original components, may impair the safety of these products in use.
1.3 Operational Concepts
Single phase actuators range in complexity from simple models, with basic operability, to quite complicated
models with a battery backup and local control capabilities. The various models are very specific in how they
interface to existing or new installations, meaning they are not easily adaptable across any site or design intent.
Read the project specifications and understand the application before making an actuator selection. It is
important to fully understand what level of control is required prior to selecting one of these products. If in doubt,
consult with a project engineer to clarify what is actually required for a fully operational installation. While it might
make sense to opt for the most feature-laden solution to cover all the possibilities in a given application, that
selection would, in fact, not function in an application that simply required the most basic unit. For this reason, it
is imperative to know the application completely before selecting a solution.
Despite all of Flowserve’s efforts to provide comprehensive information and instructions in this document on how
to determine the various actuator levels, questions will arise. Contact Flowserve for further information before
placing orders when unsure of the level of control required.

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Flowserve produces the LTQ0x3-0x4 Series with a manual handwheel on the side of the actuator (LTQ0H3 &
LTQ0H4) or an 8mm hex shaft for non handwheel units (LTQ003 & LTQ004).
 All references to the rotation direction of the LTQ0x3 Series actuator(s) are referenced while viewed from above
the actuator.
 The cam shaft and the visual indicator rotate opposite the output shaft.
The LTQ0x3 Series actuators are fully assembled, calibrated, and tested prior to leaving the factory. In most cases,
after mounting the actuator to the desired device, it should be possible to operate the actuator from fully CW
(0°) to fully CCW (90°) and back again, finding that no adjustments are necessary. If so, the assembly is ready
for immediate use. However, should it be necessary to adjust the end-of-travel positions to overcome any device
related issues (e.g., the valve shaft incorrectly timed to the drive stem), the procedures outlined below in this
document should be followed to put the assembly into service.
- There is a maximum adjustment range of ± 3° at each end-of-travel.
Error! Reference source not found. - Actuators shipped with the battery system disconnected until the unit is
commissioned after all installation procedures have been completed.

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2 Safety Information
2.1 Safety Symbols and Descriptions
This User Instruction contains specific safety markings where non-observance of an instruction would cause a
hazard. The specific safety markings are:
Table 1: Definition of safety symbols and markings
Symbol Description
DANGER
This symbol indicates a hazardous situation which, if not avoided,
will result in death or severe injury.
WARNING
This symbol indicates a hazardous situation which, if not avoided,
could result in serious injury.
CAUTION
This symbol indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
Safety Instruction
This symbol indicates specific safety-related instructions or
procedures.
NOTICE
This symbol indicates important, special instructions not related to
hazards.
SAFETY ALERT
This is the safety alert symbol. It warns of potential physical injury
hazards. Obey all safety messages that follow this symbol to avoid
injury or death.
ELECTRICAL HAZARD
This symbol indicates electrical safety instructions where non-
compliance would affect personal safety and could result in loss of
life.

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2.2 Intended Use
The product/system must not be operated beyond the parameters specified for the application. If there
is any doubt as to the suitability of the product/system for the application intended, contact Flowserve for
advice, quoting the serial number.
- Installing, operating, or maintaining the product/system in any way that is not covered in this
User Instruction could cause death, serious personal injury, or damage to the equipment. This includes any
modification to the product/system or use of any parts not provided by Flowserve.
 Only operate the product/system when it has successfully passed all inspection acceptance criteria.
 Do not operate the product/system in a partially-assembled condition.
 If the conditions of service on the customer’s purchase order change (e.g. pumping fluid,
temperature, or duty conditions), it is imperative that the user seeks written agreement from
Flowserve before start-up.
 Observe equipment labels, such as arrows designating the direction of rotation, warning signs, etc.,
and keep them in a legible condition. Replace any damaged and/or illegible labels immediately.
2.3 General Hazard Sources
- Read and follow all instructions in this IOM manual and on the equipment. Failure to follow
instructions can cause severe injury and/or death.
- Potential pinch point. Equipment connected to or driven by this device may start
unexpectedly, causing personal injury or entrapment in linkage systems.
2.3.1 Mechanical Hazards
a) Lifting limits and guidelines
- The load values mentioned in this section are Flowserve recommendations only.
Perform all lifting in compliance with site safety protocol, local regulations, and related industry
standards.
Many precision parts have sharp corners which require appropriate personal protective equipment
during handling. Prior to any attempt to lift an item, employees must first determine the approximate
weight and stability of the load.
 Always handle large, unstable, or awkward loads with the assistance of additional personnel or
appropriate mechanical means.
 Loads more than 23 kg (50 lb) should only be lifted by appropriate mechanical means and in
accordance with current local legislation or with the assistance of additional personnel.
 Lifting items less than 23 kg (50 lb) may be prohibited without assistance if the lift is repetitive
and/or awkward (i.e., away from the body, above the shoulders, or below the knees) thus
placing excessive stress on the personnel.
 Evaluate repetitive lifting, of any kind, as part of a documented end-user safety program.

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b) Manual override
The LTQ0H3 actuators do not contain mechanical stops. Use caution
when operating the manual override. Do not attempt to operate the
actuator with a rotation greater than 95°.
LTQxHx actuators are equipped with an override handwheel as shown
in Figure 1. To engage the manual override, push in the handwheel
and turn. LTQx0x actuators have an 8mm Hex shaft at the base of the
actuator for turning.
- Do not operate the bottom manual override when
power is present, and do not use powered tools to turn any manual
override. Gear train damage and/or personal injury may occur.
2.3.2 Electrical Hazards
- Risk of Electric Shock.
 Before working on any electrical equipment, turn off
power supply to the equipment.
 All electrical wiring must be in conformance with
applicable local codes, regulations, and the National Electric Code (NEC). Hazardous voltage can
shock, burn, cause death, or serious property damage. To reduce the risk of electric shock, do not
use an extension cord to connect the unit to an electric supply. Provide a properly located electrical
receptacle.
 To reduce the risk of electric shock, replace damaged wiring immediately.
 Ground all electrical equipment before connecting to an electrical power supply. Failure to ground
all electrical equipment can cause serious or fatal electrical shock hazards.
 Do not ground anything to a gas supply line.
 Failure to bond all electrical equipment to a system structure will increase the risk of electrocution
and could result in injury or death. Additionally, contact a licensed electrician for information on
local electrical codes for bonding requirements.
2.4 Qualified Personnel and Targeted Group
All personnel involved in the operation, installation, and maintenance of the unit must be qualified to carry out
the work involved. If the personnel in question does not already possess the necessary knowledge and skill,
appropriate training and instruction must be provided. If required, the operator may commission the
manufacturer / supplier to provide applicable training.
Always coordinate repair activities with operation and health and safety personnel. Make sure to follow all plant
safety requirements and applicable safety and health laws and regulations.
Figure 1: The manual override allows the user
to position the valve or damper
with or without power.

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3 Product Description
3.1 General Product Description
3.1.1 LTQ008 – LTQ230
The LTQ0x3 – LTQ0x4 Series are quarter-turn, electric industrial service actuators delivering up to 440 in-lb of
torque with voltages ranging from 12VAC/DC to 230V single-phase with on/off or proportional control modes.
These NEMA 4X and IP67 compliant units are equipped with two volt-free Form A auxiliary switches rated at, up
to, 3A 24V, and a standard clutch-free, manual-override handwheel. Additionally, these units feature two 1/2”
EMT entry ports with sealed cable glands and a raised visual position indicator, as standard. Users have the
option to customize these units with the following features: local control stations, IP68 submersible, and battery
backup.
3.1.2 Control Station LB/LK
Local Control Stations (LCS) provide a means to select Local or Remote control of a valve or damper actuator.
The LCS’s offered on the 0x3-0x4 sizes are the LB and LK. The LK features an IP65 enclosure with a lock and key
for Local and Remote locking. The LB features an IP67 enclosure without the ability to lock the controls knob
position.
3.1.3 Shipping and Handling
The actuator arrives in the fully CW (0°) position. The red/green position
indicator (see ) shows red. The quarter-turn actuator arrives factory-
tested and calibrated to operate between 0° and 90°. Most units will not
require calibration of these settings; however, if any travel adjustment is
necessary, refer to section 7 for instructions.
- Do not store this unit outside unless it is
powered up and has proper conduit terminations. When not
powered up, always store the unit in a clean, dry environment.
Figure 2: Red/green position indicator on top of
actuator

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3.2 Rotation of Components
Output drive rotation:
All LTQ0x3 Series actuators rotate CW to move from 90°
to 0°. So, when viewed from above, the output shaft
(out the bottom of the actuator) will drive CW to 0º
when performing the command.
 For all the LTQ0H3 Series actuators, the camshaft
(position indicator and travel cams) rotates
opposite from the output shaft.
 This User Instructions manual details all component
rotation descriptions from a viewpoint above the
actuator.
Table 2: Component rotation
4 Installation
- This User Instructions manual references the LTQ0x3-0x4
Series actuator rotation direction while viewed from above the actuator.
- Do NOT install battery backup units in direct sunlight.
All LTQ0H3 Series actuators rotate CW to drive the output shaft (bottom of the
actuator) to the 0° position (Figure ). The cam shaft and visual indicator rotate
opposite the output shaft.
4.1 Mounting
1. Fully close the valve or damper to which the actuator is to be mounted.
2. Assemble the necessary linkage hardware and attach the actuator to the
valve or damper.
3. Center the actuator on the valve or damper drive shaft and tighten all hardware.
4. Before applying power to the unit, rotate the manual override handwheel from the fully CW (0°) to the fully
CCW (90°) position to check for unobstructed manual operation of the valve or damper.
5. The LTQ0H3 Series actuators utilize a removable terminal block to simplify field wiring and testing.
 To remove a terminal block from the printed circuit board (PCB) receiver, pull straight out in a direction
parallel to the PCB.
Component CW (0°) Command CCW (90°)
Command
Visual
Indicator Rotates CCW Rotates CW
Cam 1 – 2
Behavior
Cam 1 engages
Switch 1 from the
rear
Cam 2 engages
Switch 2 from the
front
Output Drive Drive CW (0°) Drive CCW (90°)
Figure 3: Examples of component rotations
Figure 4: Note that the rotation
seen from below is a mirror of
the direction viewed from
above

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 In Figure , the left side of the terminal block (between the PCB mounting
screws) is pulled out to the left.
 After wiring, reinsert the terminal strip into the receiver. This is a keyed pair
and can only be inserted one way.
 Screw terminals are rated to accept 14 AWG down to 18 AWG, solid or
stranded wire.
 Terminal numbering starts from the bottom left at 1 (see Figure ).
6. Refer to the product part number to determine which wiring diagram to follow
when wiring the actuator (see Error! Reference source not found. for more
information).
7. Note that although terminals are labeled as 1-8 and A-D, not all terminals are
used on all models.
- Be sure to make field connections to the proper terminal as
identified by the label, not the position.
8. Make the electrical connections per the appropriate wiring diagram for the
actuator.
9. Connect power and control to the correct terminals.
10. Terminals A-D on each actuator are for the (adjustable) auxiliary switches. These are dry type (volt free) Form
A contacts rated for 24 V @ 3 A max.
4.2 Installation
- Follow the guidelines below for proper installation.
 These actuators are designed to be used between a horizontal and upright position. Do not mount the
assembly with the actuator top below a horizontal position (i.e. upside down).
 Protect the actuator from moisture by installing it with water-tight, electrical metallic tubing (EMT) fittings and
proper conduit drainage. Supply power to the unit to keep the internal heater warm at the time of installation.
 When installing the conduit, use proper techniques for entry into the actuator. Use drip loops to prevent conduit
condensate from entering the actuator.
 Use proper equipment on both EMT conduit ports to protect the NEMA 4X integrity of the housing.
 Use the internal heater in all applications.
 Do not install the actuator outdoors, or in humid environments, unless it is powered up and the heater is
functioning.
 Use the proper wire size to prevent actuator failure (see Table for proper wire sizing).
 All terminals accept 14 – 18 AWG solid / stranded wire.
- Do not parallel wire multiple on / off actuators together without utilizing isolation relays. If this
is the plan, contact Flowserve for a multiple actuator parallel wiring diagram.
Figure 5: Removable terminal
blocks facilitate field wiring and
testing.

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5 Theory of Operation
5.1 NCU On/Off Control
1. Starting with the most basic design are the NCU Series actuators. These models are designed for use with
existing single-phase installations where motor control centers are already established.
a. The remote devices must have
volt-free contacts (dry contacts)
which will switch the actuator’s
internal power supply to
generate commands to drive
CW (0°) or CCW (90°).
b. No Local Control Device. There is
no way to operate the actuator
locally. Only the existing Motor
Control Center (MCC) and the
controls already on-site can
operate the actuator. Without
some type of MCC, there will be
no way to drive the actuator in
either direction
Figure 6: LB 120V wiring diagram shown, others similar

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5.2 NCU Proportional Control
1. These models are designed to be used where there are no existing MCCs. Typically, these are used in new
facilities, or where additions to existing switch gears have available space limitations or is otherwise just not
feasible. The actuator generates a 24V status output that can be used remotely to verify power. These units
accept analog control signals (4 – 20 mA or 2 – 10 VDC), and they process the incoming signals to position
the actuator as a function of the incoming signal. Additionally, these units generate an analog feedback
signal proportional to the position of the actuator, which is not directly related to the incoming signal. This
feedback signal is designed to be used by automation devices or displays external to the actuator.
a. No Local Control Device.
There is no way to operate
the actuator locally. It can
only be operated by
utilizing an external PLC,
BAS, or other automation
controller generating 4 –
20 mA or 2 – 10 VDC
analog signals to position
the actuator between 0°
and 90°. Without some
type of automation
interface, there will be no
way to command the
actuator to move in either
direction.
b. Proportional Controller. This
analog processing PCB
accepts 4 – 20 mA or 2 –
10VDC from the field
accordingly.
Figure 7: LB 120V wiring diagram shown, others similar

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5.3 Control Station On/Off Controls
LTQ advanced stand-alone actuators are designed to be installed in new construction sites or existing sites
where there are NO existing local control capabilities. These single phase and low voltage actuators have
several versions that continue to add more features and options than the standard actuator range.
Moreover, these units incorporate a Local Control Station (LCS) to facilitate operating the actuator. Having this
feature allows operation of the actuator WITHOUT having an existing PLC or BAS based digital controller while
also providing operability with existing external controls.
Inside the actuator/LCS package,
you will find:
1. Integral Local Control Device.
This series is designed to
operate in Local mode
(control knobs or buttons
located on the face of the
LCS, which is an integral part
of the actuator) or in Remote
mode, which utilizes
commands from a PLC, BAS
or other volt-free contact (dry
contact) automation device.
a. While in Remote mode, the
Remote devices must have
volt-free contacts (dry
contacts) which will switch
the actuator’s internal
power supply to generate
commands to drive CW
(0°) or CCW (90°).
b. While in Local mode, the
actuator responds to the position of
the controls located on the face of the
integral LCS.
Figure 8: LB 120V wiring diagram shown, others similar

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5.4 Control Station Proportional Controls
LTQ LB advanced stand-alone actuators are designed to be installed in new construction sites or existing sites
where there are NO existing local control capabilities. These single phase and low voltage actuators have
several versions that continue to add more features and options than the standard actuator range.
These units accept analog control signals (4-20mA or 2-10VDC) and process these incoming signals to position
the actuator as a function of the incoming signal. Additionally, these units generate an analog feedback
signal proportional to the position of the actuator and not directly related to the incoming signal. This
feedback signal is designed to be used by automation devices or displays external to the actuator.
Moreover, these units incorporate a Local Control Station (LCS) to facilitate operating the actuator locally.
Having this feature allows operation of the actuator WITHOUT having an existing PLC or BAS based analog
controller while also providing operability with existing external controls.
Inside the actuator/LCS package, you will find:
1. Integral Local Control
Device. This series is
designed to operate in
Local mode (control
knobs located on the
face of the LCS which is
an integral part of the
actuator) or in Remote
mode, which utilizes
commands from a PLC,
BAS or other volt-free
contact (dry contact)
automation device.
a. While in Local mode,
the actuator responds
to the position of the
controls located on
the face of the
integral LCS.
b. All analog functions
are disabled when the
actuator is in Local
mode.
2. Proportional Controller.
When the unit is in Remote mode,
this analog processing Printed
Circuit Board (PCB) accepts 4-20mA or 2-10VDC from the field and positions the actuator accordingly,
utilizing the internal reversing motor controls. A 4-20mA or 2-10VDC feedback signal is internally
generated to provide remote reading of the position of the actuator.
Figure 9: LB 120V wiring diagram shown, others similar

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5.5 LK series LCS Operation
This round NEMA 4X & IP65 enclosure houses two rotary control switches that provide the
user with the ability to operate the actuator in a normal (REMOTE) mode where the actuator
responds to control signals from a building automation system or a PLC or other control device
(by others). Or the user can elect to operate the actuator in LOCAL mode where one
can control the positioning of the actuator while standing AT the device. This allows
opening and closing the actuator (valve) to test for operation, perform maintenance or
other function without relying on radio communication to command the automation
system to position the actuator.
A Key is provided for lockout and secured access to the MODE control switch of the
actuator. With the key removed (from any of the three positions), the MODE switch
cannot
be changed.
The Position Indicators (top).
POWER (POWER indicator, all actuators): The Power LED is illuminated whenever power is
present at the unit, regardless of MODE position.
The panel also contains two colored LED indicators to provide visual indication of the
position and status of the actuator. The green F.O. LED corresponds to the CCW (90°)
actuator position. The red F.C. LED corresponds to the CW (0°) actuator position. Both
remain steady ON when their respective end of travel is reached.
The MODE switch (right hand side) has three positions.
 REM (REMOTE, On/Off actuators): sets the actuator to respond to field generated
control signals. In this mode the POSITION KNOB has NO affect on the positioning
of the actuator. All actuator movement is controlled by the external signal device.
The manual handwheel may be used to reposition the actuator while in this mode;
however, if an active external signal is present, the actuator WILL reposition as a
function of that control signal. The indicators are active in this mode.
 REM (REMOTE, Proportional Control actuators): The actuator follows the incoming
4-20mA (2-10vdc) control signal, and generates a 4-20mA (2-10vdc) feedback signal
OUT which corresponds to the position of the actuator.
 LOC (LOCAL, On/Off actuators): sets the actuator to respond to the POSITION KNOB.
The indicators are active in this mode.
 LOC (LOCAL, Proportional Control actuators): sets the actuator to respond to the
POSITION KNOB. The indicators are active in this mode.
 OFF (all models) In the OFF position, electronic movement of the actuator is disabled.
The actuator will NOT respond to any incoming remote or local signals. The actuator MAY
be operated manually using the handwheel and the unit will STAY in its desired position.
The POSITION switch (left hand side) has three positions.
When power is present in the unit, the mode switch is operational.
 STOP (center position) removes any ability to reposition the actuator electrically.
 STOP with Proportional Control actuators: The actuator generates a 4-20mA (2-10vdc)
feedback signal OUT which corresponds to the position of the actuator.
 OP (CCW) set the POSITION switch to OP to drive the actuator to the full CCW
(90°) position.
 CL (CW) set the POSITION switch to CL to drive the actuator to the full CW (0°) position.
 The position switch can be used to “bump” or “jog” the actuator incrementally in
either direction as well.

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5.6 LB series LCS Operation
This round NEMA 4X & IP67 enclosure houses two rotary control knobs that provide the user with the ability to
operate the actuator in a normal (REMOTE) mode where the actuator responds to control signals from a
building automation system or a PLC or other control device (by others). Or the user can elect to operate the
actuator in LOCAL mode where one can control the positioning of the actuator while
standing AT the device. This allows opening and closing the actuator (valve) to test for
operation, perform maintenance or other function without relying on radio
communication to command the automation system to position the actuator.
The Position Indicators (top).
POWER (POWER indicator, all actuators): The Power LED is illuminated whenever power is
present at the unit, regardless of MODE position.
The panel also contains two colored LED indicators to provide visual indication of the
position and status of the actuator. The green F.O. LED corresponds to the CCW (90°)
actuator position. The red F.C. LED corresponds to the CW (0°) actuator position. Both
remain steady ON when their respective end of travel is reached.
The MODE switch (right hand side) has three positions.
 REM (REMOTE, On/Off actuators): sets the actuator to respond to field generated
control signals. In this mode the POSITION KNOB has NO affect on the positioning
of the actuator. All actuator movement is controlled by the external signal device.
The manual handwheel may be used to reposition the actuator while in this mode;
however, if an active external signal is present, the actuator WILL reposition as a
function of that control signal. The indicators are active in this mode.
 REM (REMOTE, Proportional Control actuators): The actuator follows the incoming
4-20mA (2-10VDC) control signal, and generates a 4-20mA (2-10VDC) feedback
signal OUT which corresponds to the position of the actuator.
 LOC (LOCAL, On/Off actuators): sets the actuator to respond to the POSITION KNOB.
The indicators are active in this mode.
 LOC (LOCAL, Proportional Control actuators): sets the actuator to respond to the
POSITION KNOB. The indicators are active in this mode.
The POSITION switch (left hand side) has three positions.
When power is present in the unit, the mode switch is operational.
 STOP (center position) removes any ability to reposition the actuator electrically.
 STOP with Proportional Control actuators: The actuator generates a 4-20mA (2-10VDC)
feedback signal OUT which corresponds to the position of the actuator.
 OP (CCW) set the POSITION switch to OP to drive the actuator to the full CCW
(90°) position.
 CL (CW) set the POSITION switch to CL to drive the actuator to the full CW (0°) position.
 The position switch can be used to “bump” or “jog” the actuator incrementally in
either direction as well.

LTQ0x3 – LTQ0x4 Series User Instructions – AIIOM000166 EN
Page 18 of 46
6 Battery Backup
6.1 Battery Identification
The LTQ003-004 Series Battery Backup units are fitted with a battery storage enclosure mounted directly onto the
actuator as shown.
All wiring for the battery pack is complete and an internal disconnect for the battery system is provided.
- Do NOT install
battery backup units in direct sunlight.
Error! Reference source not found. -
The battery system should remain
UNPLUGGED until AFTER the actuator
has been mounted and tested for
proper travel and end stop
calibration.

LTQ0x3 – LTQ0x4 Series User Instructions – AIIOM000166 EN
Page 19 of 46
6.2 120/230V Transformer Mounting and Setup
Power Supply:
The LTQ0x3 & 0x4 Series Battery Backup units require a 100VA 24vac /
5A 24vdc power supply directly into the
actuator terminal block. To facilitate various site power availability,
an optional enclosure is offered which houses an appropriately sized
toroidal transformer to supply the 24V power to the actuator.
Mounted separately, the enclosure is a NEMA 4X / IP65 9 x 7 x 6
hinged door cabinet. Mounted to a back plane, the transformer
primary and secondary are pre-wired to a six position dual terminal
block.
Notes:
The enclosure, while NEMA 4X rated, should NOT be
installed in direct sunlight. If installed outdoors, it should
be installed in the shade under a rain hood using rain-
tight conduit fittings and connectors.
The Enclosure is a sealed NEMA 4X type stainless steel type
without conduit holes or knock-outs. This allows complete
flexibility when mounting. The enclosure can be oriented in
any direction, and can be mounted on wall, floor, ceiling,
uni-strut or any other fixed surface. Conduit penetrations by
others. Interconnect wiring between transformer panel and
actuator by others per the supplied wiring diagram.
Figure 10: LTQ Series
Transformer Enclosure
(120/230VAC Installations)
Figure
11
:
LTQ Series Transformer
(120/230VAC Installations)
Figure
12
:
LTQ Series Transformer
Enclosure Dimensional Data