Flowserve Limitorque QX User manual

Experience In Motion
USER INSTRUCTIONS
Installation
Operation
Maintenance
Limitorque QX Electronic Actuator
FCD LMENIM3306-06 – 07/14

Limitorque QX Electronic Actuator FCD LMENIM3306-06 – 07/14
2
Contents
1 Important Notes 7
2 Quick Start 9
2.1 Calibrate – Position Limits 10
2.1.1 Electrical Operation Feature 10
2.1.2 Handwheel Operation Feature 12
2.1.3 Entering the Setup Mode 15
2.2 DDC Option 15
2.3 Check the Settings 15
3 Installation and Operation 16
3.1 Preparing the Stem Nut 16
3.1.1 Torque Applications 16
3.2 Mechanical Installation onto Valve or Gearbox 18
3.3 Electrical Connections 18
3.3.1 Removing Terminal Cover 18
3.3.2 Terminal Compartment Documents 18
3.3.3 Sealing Cable/Conduit Entries 19
3.3.4 Recommended Terminal Connections 19
3.3.5 Termination of Cables 21
3.3.6 Cable Connections 21
3.3.7 Network Installations 22
3.3.8 Foundation Fieldbus Installation 25
3.3.9 Network Wiring – Profibus DP/PA Installation 26
3.3.10 Network Wiring – DeviceNet 27
3.3.11 Replacing Terminal Cover 27
3.3.12 External Earth/Ground Connections 27
3.4 Terminal Block Shield Installation 27
3.5 Commissioning the Actuator 28
3.5.1 Default Configuration Set 28
3.5.2 View the Existing Settings 30
3.5.3 Entering the Setup Mode 30
3.5.4 Setting Position Limits 31
3.6 Operating the QX Actuator 34
3.6.1 Manual Operation 34
3.6.2 Electrical Operation 34
3.6.3 Local Control 34
3.6.4 Remote Control 35
3.6.5 Local Indication 35
4 Customizing the Actuator 37
4.1 Changing the Existing Settings 37
4.2 Password Entry 39
4.3 New Password 40
4.4 Valve Setup 41
4.4.1 Close Direction 41
4.4.2 Close Seating 41
4.4.3 Open Seating 41
4.5 Torque Switch Timer 42
4.5.1 Status 42
4.5.2 Torque Timer 42
4.6 Operating Time 43
4.7 Torque Setup 43
4.7.1 Close Torque Valve or Open Torque Valve 44
4.8 Position Setup 44
4.8.1 Set Position Limits for Electrical Operation 44
4.8.2 Set Position Limits for Manual Operation 45

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4.9 Modutronic Option 47
4.9.1 Status 47
4.9.2 Proportional Band 47
4.9.3 Fail Position 47
4.9.4 Deadband 47
4.9.5 Polarity (20 mA) 47
4.9.6 Delay After Stop 48
4.9.7 4-20 mA Signal Range 48
4.9.8 Set High Reference 48
4.9.9 Set Low Reference 48
4.9.10 Modutronic LCD Display 49
4.10 DDC Option 49
4.10.1 Status 49
4.10.2 Network Address 50
4.10.3 Protocol 50
4.10.4 Analog Scale 50
4.10.5 ESD Action 50
4.10.6 Proportional Band 51
4.10.7 Deadband 51
4.10.8 Offset 51
4.10.9 Move To 51
4.10.10 Comm Loss Delay 51
4.10.11 Comm Loss Action 51
4.11 FF Option 51
4.11.1 Status 52
4.11.2 Terminate Bus 52
4.11.3 Analog Scale 52
4.11.4 ESD Action 52
4.11.5 OPEN/CLOSE Mode 52
4.11.6 Proportional Band 52
4.11.7 Deadband 52
4.11.8 Comm Loss Delay 53
4.11.9 Comm Loss Action 53
4.12 PB Option 53
4.12.1 Status 54
4.12.2 PB DP Operation 54
4.12.3 Comm Loss Delay 55
4.12.4 Comm Loss Action 55
4.13 DN Option 55
4.13.1 Status 56
4.13.2 Baud Rate 56
4.13.3 Network Address 56
4.13.4 ESD Action 56
4.13.5 Proportional Band 56
4.13.6 Deadband 56
4.13.7 Comm Loss Delay 57
4.13.8 Comm Loss Action 57
4.14 Status and Alarm Contacts 57
4.14.1 Status and Alarm Contact Default Settings 58
4.14.2 Status Function 58
4.14.3 Contact 59
4.14.4 Valve Position 59
4.15 Two-speed Timer (Optional) 59
4.15.1 Status 59
4.15.2 Start Position 59
4.15.3 Stop Position 60
4.15.4 Pulse Time – ON 60
4.15.5 Pulse Time – OFF 60

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4.16 Change Analog Out 60
4.16.1 APT Polarity Option 62
4.16.2 ATT Polarity Option 63
4.17 Remote Mode 63
4.18 Local Control 64
4.18.1 LED Customization 64
4.19 ESD (Emergency Shutdown) Overrides 64
4.19.1 ESD Override 65
4.19.2 Inhibit 65
4.19.3 Local Command 65
4.19.4 Stop 65
4.19.5 Jammed Valve* 65
4.19.6 Lost Phase* 66
4.19.7 Overtorque* 66
4.19.8 Motor Thermostat 66
4.19.9 Oil Over Temperature 66
4.19.10 Two-Speed Timer 66
4.19.11 Network ESD 67
4.19.12 Torque Switch Timer 67
4.20 Inputs 67
4.20.1 Input Standard Remote Control 67
4.20.2 Status 68
4.20.3 Custom Input Mode #1 – Momentary ESD/PSESD (Optional) 68
4.20.4 Custom Input Mode #2 – Momentary ESD/CSE (Optional) 71
4.20.5 Custom Input Mode #3 – ESD Time Delay Relay 71
4.20.6 Custom Input Mode #4 – Multi-Position Mode (Optional) 72
4.21 Monitor Relay 73
4.22 Diagnostic Reset 74
4.23 TAG Number 75
4.24 LCD Contrast 76
4.25 Motor Thermostat 76
4.26 Change Valve Data 76
4.27 Change Port 77
5 Troubleshooting 78
5.1 View Diagnostics Routine 79
5.2 Troubleshooting Problems/Corrective Action 79
5.2.1 Actuator Fails to Operate 79
5.2.2 Jammed Valve Detected 80
5.2.3 Actuator Operates but Does Not Drive Valve 80
5.2.4 Valve Does Not Seat Correctly 80
5.2.5 Status Messages 81
5.3 View Diagnostics 83
5.4 View Hardware Status 84
5.5 View Motor Status 85
5.6 View Power Supply 85
5.7 View Identification 85
5.8 View Torque Profile 86
5.9 View Operation Log 86
5.10 View DNET Status? 88
6 Maintenance 90
6.1 Lubrication 90
6.1.1 Oil Capacities 90
6.1.2 Checking Oil Level 90
7 Regulatory Information 91
7.1 Specific Conditions for Safe Use — Atex/Cenelec/IECEx Applications 94
7.2 Statement of Compliance with Applicable European Directives 94

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Figures
Figure 1.1 – QX-05 Actuator 7
Figure 2.1 – Electrical operation 12
Figure 2.2 – Handwheel operation 14
Figure 2.3 – QX travel stops 14
Figure 3.1 – Top view - stem nut with standard keyway position 17
Figure 3.2 – Exploded view of QX bases 17
Figure 3.3 – Power terminal connector size limitations 19
Figure 3.4 – Terminal block 20
Figure 3.5 – Control terminal connector size limitations 20
Figure 3.6 – View of terminal block 22
Figure 3.7 – Standard wiring diagram - three phase shown 23
Figure 3.8 – Removing outer plastic jacket 23
Figure 3.9 – Separating cable parts 24
Figure 3.10 – Stripping conductors and applying heat shrink tubing 24
Figure 3.11 – Ring tongue connectors 24
Figure 3.12 – Terminal block shield 28
Figure 3.13 – User network connection for loop topology 29
Figure 3.14 – External earth/ground connection – housing 29
Figure 3.15 – View settings 31
Figure 3.16 – Position setup – electrical operation 33
Figure 3.17 – Declutch lever shows direction of engagement (QX-05 shown) 34
Figure 3.18 – Control panel 35
Figure 4.1 – Entering the setup mode 38
Figure 4.2 – Main menu selections 38
Figure 4.3 – Changing settings 39
Figure 4.4 – Password entry 40
Figure 4.5 – New password 40
Figure 4.6 – Valve setup 41
Figure 4.7 – Torque switch timer 42
Figure 4.8 – Operating Time Setup 43
Figure 4.9 – Torque setup 43
Figure 4.10 – Typical XP nameplate 44
Figure 4.11 – Electrical operation 46
Figure 4.12 – Handwheel operation 46
Figure 4.13 – Modutronic option 48
Figure 4.14 – Modutronic signals 49
Figure 4.15 – DDC 50
Figure 4.16 – Foundation Fieldbus 53
Figure 4.17 – Profibus DP 54
Figure 4.18 – Profibus PA 55
Figure 4.19 – DN Option 57
Figure 4.20 – Status and alarm contacts (Shown with optional boards added) 59
Figure 4.21 – Two-speed timers 60
Figure 4.22 – Change Analog Out 61
Figure 4.23 – Change Analog Out Voltage – APT 61
Figure 4.24 – Change Analog Out Current – APT 61
Figure 4.25 – Change Analog Out Voltage – ATT 62
Figure 4.26 – Change Analog Out Current – ATT 62
Figure 4.27 – Remote mode 63
Figure 4.28 – Local control 64
Figure 4.29 – ESD Overrides 65
Figure 4.30 – Inputs 68
Figure 4.31 – Custom Input Mode 70

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Figure 4.32 – Monitor relay 73
Figure 4.33 – Diagnostic reset 75
Figure 4.34 – TAG number 75
Figure 4.35 – LCD contrast 76
Figure 4.36 – Motor thermostat 76
Figure 4.37 – Change valve data 77
Figure 4.38 – Change port and Bluetooth settings 77
Figure 5.1 – Initialize routine 83
Figure 5.2 – Diagnostic overview 84
Figure 5.3 – View hardware status 84
Figure 5.4 – View motor status 85
Figure 5.5 – View power supply 85
Figure 5.6 – View identification 86
Figure 5.7 – View torque profile 86
Figure 5.8 – View operation log 87
Figure 5.9 – View DNET status 88
Figure 7.1 – Typical ATEX nameplate 95
Tables
Table 3.1 – Available QX Flanges 13
Table 3.2 – Terminal block rating; power terminals 20
Table 3.3 – Terminal block rating; control terminals 21
Table 3.4 – Required ratings for external wires 22
Table 3.5 – Loop topology connections 25
Table 3.6 – Foundation Fieldbus connections 26
Table 3.7 – Profibus cable specifications 26
Table 3.8 – DeviceNet cable specifications 27
Table 3.9 – Default configurations 29
Table 3.10 – LED Indicators – default settings 36
Table 4.1 – Digital Input Terminals 72
Table 6.1 – Oil capacities 90

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Figure 1.1 – QX-05 Actuator
13
12
3
1
4
6
10
2
7
5
11
3
3
14
9
9
9
OPTIONAL
8
15
1 Important Notes
• Please read this manual in its entirety before attempting to install or operate your QX actuator. A full understanding
of the installation and operation options will assist you in installing the actuator in the most effective manner.
Limitorque has designed the QX actuator for long life even in the harshest environments. Flexible control and protec-
tion options are provided to ensure the actuator meets your requirements.
• All actuator enclosures are sealed by O-rings, and cable entries are supplied with threaded plugs to protect the
terminal compartment until the unit is wired. If the actuator cannot be installed immediately, it is recommended that
it be stored in a clean, dry place, preferably in an area that is not subject to large fluctuations in temperature.
• Disconnect all incoming power before opening any cover on the actuator. The user/operator must ensure that safe
working practices are employed at all times and are in accordance with local or national standards that are enforced
at the particular site.
• To install and commission the actuator, only the terminal compartment cover needs to be removed. See Figure
1.1, Item 10. Settings for commissioning the actuator are done externally; therefore, no other covers need to be
removed. The actuator was assembled in ideal dry conditions and the total sealing of the enclosure protects all
electrical components against deterioration.
Piece Description
1Handwheel
2Declutch Lever (QX-05)
3Oil Fill
4Controls Cover
5LCD
Piece Description
6Control Knob
7Ground Lug
8Baseplate
9Conduit Entry
10 Terminal Compartment
Piece Description
11 Motor
12 Certification Nameplate
13 Tag Nameplate
14 Oil Plug
15 Stem Nut Stops

Limitorque QX Electronic Actuator FCD LMENIM3306-06 – 07/14
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NOTE: Removal of any cover, other than the terminal compartment cover, will invalidate the unit warranty. Exposure
of actuator components to an environment that results in deterioration of internal components will also invalidate the
unit’s warranty.
• During final field installation, ensure that all cable entries are correctly sealed in accordance with National Standards
or Regulatory Authorities. All temporary transit plugs must be removed and any unused cable entries closed in an
approved manner. See Section 3.3.3, Sealing Cable/Conduit Entries.

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2 Quick Start
Quick Start provides step-by-step instructions for commissioning each QX actuator. These instructions are for the
following:
• Position limits calibration – can be performed one of two ways:
1. Electrical operation: See Section 2.1.2, Electrical Operation Feature.
2. Handwheel operation: See Section 2.1.2, Handwheel Operation Feature.
• DDC operation: See Section 2.2, DDC Option.
When these Quick Start instructions are complete, the position limits will be set and the actuator will be ready for
normal operation.
NOTE: Units are shipped with default operating time values based on unit size:
QX-1: 5-20 sec, default 15 sec
QX-2: 8-30 sec, default 30 sec
QX-3: 15-60 sec, default 60 sec
QX-4: 30-120 sec, default 60 sec
QX-5: 60-120 sec, default 60 sec
These times are based on a 90° open to close span.
The operating time can be set as desired by following the instructions in document LMENIM3306, QX Actuator
Instruction, Operation and Maintenance Manual.

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2.1Calibrate Position Limits
1. Confirm that the QX actuator is correctly installed on the valve as described in Section 3 Installation and Operation.
2. Refer to the nameplate for the correct main power supply voltage. Switch on the main power to the unit.
3. Turn the red knob to the “STOP” position. The “SET UP ENGLISH?” message will be displayed, select “YES”. The
“SET CLOSE POSITION LIMIT?” message will then be displayed. Proceed with setting the open and close limits of
the valve.
4. Calibrate end position limits one of two ways:
• Electrically, using the control panel. See Section 2.1.1, Electrical Operation Feature.
• Manually, using the handwheel. See Section 2.1.2, Handwheel Operation Feature.
Once the position limits have been set, the LCD message will indicate the valve position as a percentage of the valve
opening.
While setting limit switches, place the red selector knob in the “LOCAL” position to permit the actuator to run open or
closed in push-to-run mode (inching) only.
a CAUTION: Extreme care must be taken as the valve approaches its end position.
The unit will not function with the red selector knob in the “REMOTE” position until both limit switches are set.
The existing configuration of the actuator/valve parameters may be viewed by entering the “SETUP” mode.
2.1.1 Electrical Operation Feature
This feature allows for quick and simple calibration. From a virgin startup, the “SET CLOSE POSITION LIMIT?” message
will be displayed once the setup language has been selected.
NOTE: Refer to Figure 2.1 – Electrical operation as a guide during setup
a CAUTION: Do not adjust close stop while stop is loaded. It is highly recommended that the stops be turned until
they are almost removed from the housing before setting the limits. Once the limits have been set, then the
stops maybe tightened. Refer to Figure 2.3.
Closed Position Limit
1. “SET CLOSE POSITION LIMIT?” is displayed on the LCD.
2. Select “YES.” The “CLOSE VALVE - OK?” message is displayed.
3. Switch the actuator to “LOCAL” control and use the open/close switch to position the valve to the desired closed
position.
4. Back out the close stop if needed. First loosen the screw securing the stop then move stop.
NOTE: Do not adjust close stop while stop is loaded.
5. When the valve is in the desired position, switch the actuator back to “STOP” and select “YES” again. The LCD will
read “SAVE CLOSE LIMIT OK?”
6. Select “YES” if the valve’s close limit position is correct. The close position limit is set.
7. Turn the close stop against the drive sleeve, then back off the close stop from the drive sleeve approximately 0.5 to
1.5 turns, ensuring the stop does not contact the drive sleeve.

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a CAUTION: Do not adjust close stop while stop is loaded. It is highly recommended that the stops be turned until
they are almost removed from the housing before setting the limits. Once the limits have been set, then the
stops maybe tightened. Refer to Figure 2.3.
Open Position Limit
8. “SET OPEN POSITION LIMIT?” is displayed on the LCD.
9. Select “YES.” The “OPEN VALVE - OK?” message is displayed.
10. Switch the actuator to “LOCAL” control and use the open/close switch to position the valve to the desired open
position.
11. Back out the open stop if needed. First loosen the screw securing the stop then move stop.
NOTE: Do not adjust open stop while stop is loaded.
12. When the valve is in the desired position, switch the actuator back to “STOP” and select “YES” again. The LCD will
read “SAVE OPEN LIMIT OK?”
13. Select “YES” if the valve’s open position limit is correct. The open position limit is set.
14. Turn the open stop against the drive sleeve, then back off the open stop from the drive sleeve approximately 0.5
to 1.5 turns, ensuring the stop does not contact the drive sleeve.
15. Once the limits have been set, electronically cycle the valve open and closed. While at each respective limit of
travel and in the motionless condition, reconfirm that the stop does not contact the drive sleeve. To confirm,
rotate the stop freely back and forth, encountering only O-ring drag. If the drive sleeve has not been loaded
against the stop, secure the stop with screw to lock it in place. If the stop is loaded by the drive sleeve, the stop
must be backed away further from the drive sleeve. If stop was in contact with the drive sleeve repeat Step 15 from
the beginning.
There must be no load on the drive sleeve before adjusting stops.
16. When “SET CLOSE POSITION LIMIT?” and “SET OPEN POSITION LIMIT?” are both completed, set calibration if
desired.

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Figure 2.1 – Electrical operation
“NO ” operates
close direction
“YES” operates
open direction
Enter “SETUP ” mode
OPEN VALVE
RETURN TO STOPOPEN VALVE OK ? SAVE OPEN LIMIT OK?
SETUP?
CLOSE VALVE
RETURN TO STOPSAVE CLOSE LIMIT OK?
CLOSE VALVE
OK ? CLOSE VALVE OK ?
EXIT
SETUP?
100% OPEN
STATUS OK?
SET CLOSE
POSITION LIMIT?
YES
YES YES
YES
YES
YES YES YES
NO NO NO NO NO
NO
NO
NO
NO
STOP
STOP
STO
P
LOCAL
Switch to
LOCAL
Switch to
OPEN VALVE
OK ?
SET OPEN
POSITION LIMIT?
YES
NO
NO
SET POSITION
PRECISION? POSITION
XXX% OPEN?
YES
NO
NO
POSITION
XXX.X% OPEN?
NO
YES
YES
The position settings are now complete. The actuator will now function as ordered, and may be run electrically to
inspect for correct operation.
Once initial setup has been completed, the “SETUP?” message is displayed. Select “YES” to continue with additional
setup options or “NO” to exit the setup menu. Confirm exit setup with “NO” when “EXIT SETUP” message is displayed.
2.1.2 Handwheel Operation Feature
To set the position limits manually, from a virgin startup the “SET CLOSE POSITION LIMIT?” message will be displayed
once the setup language has been selected.
NOTE: Refer to Figure 2.2 – Handwheel operation as a guide during setup
a CAUTION: Do not adjust close stop while stop is loaded. It is highly recommended that the stops be turned until
they are almost removed from the housing before setting the limits. Once the limits have been set, then the
stops maybe tightened. Refer to Figure 2.3.

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Closed Position Limit
1. “SET CLOSE POSITION LIMIT?” is displayed on the LCD.
2. Select “YES.” The “CLOSE VALVE - OK?” is displayed.
3. Depress the declutch lever, and at the same time slowly rotate the handwheel until the clutch is fully engaged.
Release the lever; the clutch will be retained in the handwheel mode by spring-loaded latches.
4. Back out the close stop if needed. First loosen the screw securing the stop then move stop.
NOTE: Do not adjust open stop while stop is loaded.
5. Ensure the valve is fully closed, then move the valve in the open direction for one to two handwheel turns to allow
for coasting of the motor.
6. When the valve is in the desired position, select “YES”. The LCD will read “SAVE CLOSE LIMIT OK?”
7. Select “YES” if the valve’s close limit position is correct. The close position limit is set.
8. Turn the close stop against the drive sleeve, then back off the close stop from the drive sleeve approximately 0.5 to
1.5 turns, ensuring the stop does not contact the drive sleeve.
a CAUTION: Do not adjust close stop while stop is loaded. It is highly recommended that the stops be turned until
they are almost removed from the housing before setting the limits. Once the limits have been set, then the
stops maybe tightened. Refer to Figure 2.3.
Open Position Limit
9. “SET OPEN POSITION LIMIT?” is displayed on the LCD.
10. Select “YES.” The “OPEN VALVE - OK?” is displayed.
11. Depress the declutch lever, and at the same time slowly rotate the handwheel until the clutch is fully engaged.
Release the lever; the clutch will be retained in the handwheel mode by spring-loaded latches.
12. Back out the open stop if needed. First loosen the screw securing the stop then move stop.
NOTE: Do not adjust open stop while stop is loaded.
13. Ensure the valve is fully open, then move the valve in the close direction for one to two handwheel turns to allow for
coasting of the motor.
14. When the valve is in the desired position, select “YES” again. The LCD will read “SAVE OPEN LIMIT OK?”
15. Select “YES” if the valve’s open position limit is correct. The open position limit is set.
16. Turn the open stop against the drive sleeve, then back off the open stop from the drive sleeve approximately 0.5
to 1.5 turns, ensuring the stop does not contact the drive sleeve.
17. Once the limits have been set, electronically cycle the valve open and closed. While at each respective limit of
travel and in the stopped condition, reconfirm that the stop does not contact the drive sleeve. To confirm,
rotate the stop freely back and forth, encountering only O-ring drag. If the drive sleeve has not been loaded
against the stop, secure the stop with screw to lock it in place. If the stop is loaded by the drive sleeve, the
stop must be backed away further from the drive sleeve. The drive sleeve must be backed off the stop
before adjusting stops. There must be no load on the drive sleeve before adjusting stops. If stop was in contact
with the drive sleeve repeat Step 17 from the beginning.
18. When “SET CLOSE POSITION LIMIT?” and “SET OPEN POSITION LIMIT?” are both completed, set calibration if
desired.

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Figure 2.2 – Handwheel operation
Declutch actuator;
Rotate handwheel to
“CLOSE” position limit
Rotate handwheel to
“OPEN” position limit
Enter “SETUP” mode
OPEN VALVE
OK ? SAVE OPEN
LIMIT OK?
SETUP?
SAVE CLOS E
LIMIT OK?
CLOSE VALVE
OK ?
SET CLOSE
POSITION LIMIT?
SET OPEN
POSITION LIMIT?
EXIT
SETUP? 100%
STATUS OK
YES
STO
P YES YES
YES
YES
YES
YES
YES
NO NO NO
NO NO NO
NO
NO
SET POSITION
PRECISION? POSITION
XXX% OPEN
YES
NO NO
The position settings are now complete. The actuator will now function as ordered, and may be run electrically to
inspect for correct operation.
Once initial setup has been completed, the “SETUP?” message is displayed. Select “YES” to continue with additional
setup options or “NO” to exit the setup menu. Confirm exit setup with “NO” when “EXIT SETUP” message is displayed.
Figure 2.3 – QX travel stops
STOP INDICATOR BANDS
GROUNDING LUG SLOT
FOR ANTI-ROTATION
QX STOP
2-PLACES
AS SHOWN

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2.1.3 Entering the Setup Mode
To access the Setup Mode after initial setup has been exited, use these steps:
1. Place the red selector knob in the “STOP” position.
2. Within 10 seconds, place the black control knob in the “YES” position, then the “NO” position, then again in the
“YES” position (in quick succession—approximately one to two seconds).
3. The message “SETUP?” will appear in the LCD display for 10 seconds. Select “YES”. If no setup action is taken
within 10 seconds, the unit will reset.
4. Use the black control knob to answer “YES” or “NO” to the questions appearing in the display.
2.2 DDC Option
The following instructions assume that all DDC option parameters are set with the exception of the address.
1. After setting position limits, remain in the “SETUP” mode. If not in the “SETUP” mode, enter the “SETUP” mode as
detailed in Section 2.1.3, Entering the Setup Mode.
2. When LCD reads “CHANGE SETTINGS?”, select “YES.”
3. The LCD will display the “CHANGE SETTINGS” mode menu items. Select “NO” until screen displays “CHANGE
DDC?” Select “YES.” LCD will display DDC menu items.
4. Select “YES” for each menu item until “DDC ADDRESS OK?” appears. Select “NO.”
5. Enter an address from 1 to 250 by toggling “NO” until the correct address is displayed. User may select to hold
the knob in the “NO” direction and the number will automatically increment by one until the preferred address is
reached.
NOTE: The DDC address does not have to be set to exit the setup.
a CAUTION: The network address must be entered in accordance with the user address assignment sheet. This
assignment sheet should correspond to the contract specifications. The same address must not be used
anywhere else in the same network. The DDC address does not have to be set to exit the setup.
2.3 Check the Settings
1. Operate the valve to the fully “CLOSE” position. Verify that the “CLOSE” (default GREEN) LED illuminates just as
the travel limit is reached, and the valve position is displayed as “0% OPEN.”
2. Operate the valve to the fully “OPEN” position. Verify that the “OPEN” (default RED) LED illuminates just as the
travel limit is reached, and the valve position is displayed as “100% OPEN.”

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3 Installation and Operation
3.1 Preparing the Stem Nut
The QX has two (2) basic base designs:
• Torque-only (90º) operation
• Multi-turn operation (up to 20 multi-turn rotations - 7200º total)
3.1.1 Torque Applications
Standard B4/B4E Base
The standard QX actuator base is the stem nut for torque-only. It includes a mounting plate and steel torque nut, which
may be machined to fit a valve or gearbox. A B4E torque nut can be provided and may be installed to allow for extended
stem acceptance.
Table 3.1 – Available QX Flanges
QX-1 QX-2 QX-3 QX-4 QX-5
Flange 1 ISO 5210 F05/F07 F07 F10 N/A N/A
MSS SP-102 FA05/07 FA07 FA10 N/A N/A
Flange 2
ISO 5210 F10 F10 F12 (OPT)
F14 (STD)
F12 (OPT)
F14 (STD)
F14
MSS SP-102 FA10 (STD) FA10 (STD) FA12 (OPT)
FA14 (STD)
FA12 (OPT)
FA14 (STD)
FA14 (STD)
Disassembly – Flange 1
1. Remove base plate mounting screws and small base plate.
2. Remove the two torque nut mounting screws and remove the torque nut.
3. Machine the torque nut to suit the valve stem or gearbox input shaft. Ensure sufficient clearance for a smooth,
sliding fit.

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Disassembly – Flange 2
1. Remove the two torque nut mounting screws and remove the torque nut.
2. Machine the torque nut to suit the valve stem or gearbox input shaft. Ensure sufficient clearance for a smooth,
sliding fit.
Figure 3.1 - Top view - Stem nut with standard keyway position
Reassembly
1. Clean the torque nut thoroughly and lightly grease.
2. Replace the torque nut in the drive sleeve. Ensure the torque nut meshes with the drive lugs.
3. Reinstall the torque nut mounting screws.
Figure 3.2 – Exploded view of QX bases
45°
TOP VIEW - STEM NUT
W/ STD KEYWAY POS.
DRIVE SLEEVE LUGS
STRADDLE C
L
STANDARD KEYWAY
POSITION 45°OFF LUGS
(SEE NOTE 1)
STAND
ARD
BASEPLAT
E
TORQUE NUT
TORQUE NUT
MOUNTING SCREWS
STANDARD
BASE PLATE
TORQUE NUT
TORQUE NUT
MOUNTING SCREWS
SMALL BASE PLATE
SMALL BASE PLATE
MOUNTING SCREWS
QX-1 F/FA05 & F/FA07, QX-2 F/FA07 Base,
QX-3 F/FA10 Base
QX-1, -2 F/FA10 Base
QX-3, -4, -5 F/FA12 & 14 Base

Limitorque QX Electronic Actuator FCD LMENIM3306-06 – 07/14
18
3.2 Mechanical Installation onto Valve or Gearbox
Before installing the actuator onto a valve or gearbox, check the following to ease installation:
• Verify that mounting flange is suited dimensionally to mate with the actuator base. Ensure that it is perpendicular to
the valve stem.
• Ensure the stem nut mates with the valve stem or input shaft. Keyed or splined shafts should exhibit a smooth,
sliding fit with the key installed.
• Ensure there is adequate engagement of the stem nut with the valve stem or input shaft when mounted. Generally, the
minimum length of engagement is 1.5 times the diameter of the stem.
• Ensure that the valve stem is not too long such that it bottoms out on the QX drive sleeve.
• Verify that mounting studs or bolts are the correct length to suit the thickness of the mounting plate.
• Verify hardware specifications for English style:
• Socket head cap screw per ASTM A 574 and ANSI 18.3.
• Hex head cap screw per SAE J429 Grade 5.
• Verify hardware specifications for metric style: hex and socket head cap screws per Property Class 12.9.
• Clean and lubricate the valve stem or input shaft.
• Ensure adequate lifting facilities and slings are available at the installation site.
NOTE: Do not use the handwheel to lift the actuator.
3.3 Electrical Connections
Verify that the supply voltage details on the nameplate are correct for this installation. Setup is non-intrusive; therefore,
remove only the terminal cover to make electrical connections and to commission the actuator.
c WARNING: The removal of any other covers without Limitorque’s approval will void the warranty. Limitorque
will not accept responsibility for any damage or deterioration that may occur as a result of cover removal.
3.3.1 Removing Terminal Cover
Remove the terminal cover as follows:
1. Remove the four cover screws using a 6 mm hexagonal wrench.
2. Remove the cover. XP units have long-spigoted covers and two tapped holes 180° apart. If the XP cover is difficult
to remove, fit two of the cover screws into the tapped holes in the cover flange and jack out the cover. Take care to
turn the screws by equal increments. Do not lever the cover off with a screwdriver, or similar object, since this may
damage the flamepath on an explosionproof unit or the O-ring seal and seating face.
3.3.2 Terminal Compartment Documents
The OEM and user installation kits, wiring diagram, and test report are contained in the terminal compartment or with
the actuator. Do not place them in the terminal compartment when the electrical connections have been completed.
NOTE: This instruction does not apply to valve manufacturers or similar installers of the actuator onto a valve prior to
shipping to site. It is important that these items are available at the final destination site.

19
Limitorque QX Electronic Actuator FCD LMENIM3306-06 – 07/14
flowserve.com
3.3.3 Sealing Cable/Conduit Entries
The sealing of cables and conduit entries should be done in accordance with National Standards or the Regulatory
Authorities that have certified the actuators. This is particularly true for units that are certified for use in hazardous areas
where the method of sealing must be to an approved standard and cable glands, reducers, plugs, and adapters must be
approved and separately certified. All conduit entries should be sealed against the climatic conditions prevailing on-site,
especially if temporary submersion is possible. All unused conduit entries should be sealed with threaded metal plugs.
Plastic plugs are installed by Limitorque for shipping only and must not be used as permanent seals.
3.3.4 Recommended Terminal Connections
Power Terminals
Ring tongue connectors used on the power terminals should comply with the dimensions shown in Figure 3.3. For
Additional information, consult terminal manufacturer.
Table 3.2 details the allowable voltage and current parameters for the terminal block power terminals. Preload the M5
screws to 1.6-3.2 N m (1.2-2.33 ft-lb).
Control Terminals
Ring tongue connectors used on the control terminals should comply with the dimensions shown in Figure 3.5. For
additional information, consult terminal manufacturer. Preload the M3 screws to 0.33-0.66 N m (0.25-0.50 ft-lb).
NOTE: Alternative manufacturers may be substituted only if dimensions are in accordance with Figure 3.5.
NOTE: The use of spade terminals is not recommended for secure electrical connections.
Figure 3.3 – Power terminal connector size limitations - all dimensions are in mm
NOT TO
EXCEED 15
NOT TO
EXCEED 6.5
NOT TO
EXCEED 9.8
TO BE SIZED
FOR M5 SCREW
SPADE AND SNAP
TERMINALS
MAX. THICKNESS = 1.6 mm
TO BE SIZED
FOR M5 SCREW
NOT TO
EXCEED 9.6
NOT TO
EXCEED 15
RING TERMINAL
NOT TO
EXCEED 3.5
FLANGED
SPADE TERMINAL

Limitorque QX Electronic Actuator FCD LMENIM3306-06 – 07/14
20
Table 3.2 lists the maximum allowable voltage and current parameters for the terminal block control terminals.
Table 3.2 – Terminal block rating; power terminals
Description L1 L2 L3
STD Rating
30 AMP 20 AMP 15 AMP
8 Awg/10 mm210 Awg/6 mm214 Awg/2.5 mm2
600 VAC RMS 150 VDC
Increased
Safety Rating
27 AMP 18 AMP 13.5 AMP
8 Awg/10 mm210 Awg/6 mm214 Awg/2.5 mm2
500 VAC RMS 150 VDC
Figure 3.4 - Terminal Block
Figure 3.5– Control terminal connector size limitations - all dimensions are in mm
NOT TO
EXCEED 4.0
NOT TO
EXCEED 7.6
NOT TO
EXCEED 5
TO BE SIZED
FOR M3 SCREW
SPADE AND SNAP
TERMINAL
MAX. THICKNESS = 1.0 mm
NOT TO
EXCEED 5
TO BE SIZED
FOR M3 SCREW
RING TERMINAL
NOT TO
EXCEED 8.2
NOTE: Limitorque recommends the use of the following connector for optimum results: Thomas and Betts #RZ22-6.
NOTE: Alternative manufacturers may be substituted only if the dimensions are in accordance with Figure 3.5.
3X M5 SCREW
3X M5 SPRING
WASHER 54X M3 SPRING
WASHER
54X M3 SCREW
THE USE OF THE SPRING WASHERS ARE REQUIRED
ON INCREASED SAFETY APPLICATIONS.