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PRODUCT DATA

65-0239-2

® U.S. Registered Trademark
Copyright © 2003 Honeywell International Inc.
 All Rights Reserved 

ML7999A

Universal Parallel-Positioning Actuator

APPLICATION

ML7999A Universal Parallel-Positioning Actuator provides 

100 lb-in. torque, pulse-width-modulating (PWM) control of 

combustion air dampers, butterfly gas valves, oil modulation 

valves, and flue gas recirculation systems. The actuator 

includes a precision feedback potentiometer and integral 

power supply capable of direct line voltage connection. The  

ML7999A Actuator is part of the ControLinks™ Control 

System, and must be used with the R7999 ControLinks™ 

Controller.

FEATURES

• Universal power supply input.
• Password protected with an eight-digit hexadecimal 

identification signal.

• 100 lb-in. (11.3 Nm) torque.
• Includes integral position feedback potentiometer.
• Separate wiring compartment between line voltage 

power wiring and low voltage control.

• Direct coupling shaft interface mounting.
• Couples directly to a 1/2 in. (13 mm) shaft with no 

additional parts required.

• Couples directly to 5/16 in. (8 mm) and 3/8 in. (9 mm) 

shafts using available self-centering shaft reduction 

accessories.

• Shaft coupler assembly available for shafts larger than 

1/2 in.

• Bracket Accessory Kit available for mounting to 

Honeywell V51 Butterfly Gas Valves.

• Visual indication of actuator position.

Contents

Application ........................................................................

1

Features ...........................................................................

1

Specifications ...................................................................

2

Ordering Information  ........................................................

2

Installation ........................................................................

3

Wiring ...............................................................................

4

Operation ..........................................................................

5

Checkout And Troubleshooting  ........................................

5

Содержание ML7999A

Страница 1: ...FEATURES Universal power supply input Password protected with an eight digit hexadecimal identification signal 100 lb in 11 3 Nm torque Includes integral position feedback potentiometer Separate wiring compartment between line voltage power wiring and low voltage control Direct coupling shaft interface mounting Couples directly to a 1 2 in 13 mm shaft with no additional parts required Couples dire...

Страница 2: ...differential between DR1 DR2 Drive Counterclockwise Maximum 4 25 Vdc differential between DR1 DR2 NOTE Actuator does not respond until the 8 digit ID signal from the R7999 is passed via DR1 DR2 Actuator Stroke 95 nominal 3 mechanically limited Output Hub Position Accuracy 0 1 Torque Ratings at Rated Voltages Lift and Hold Minimum 100 lb in 11 3 Nm Breakaway Minimum 100 lb in 11 3 Nm Stall Minimum ...

Страница 3: ... and acid fumes can damage the actuator metal parts Install actuator in areas free of acid fumes and other deteriorating vapors Mounting ML7999 Actuator The actuator mounts on a 1 2 in round or square shaft For shafts smaller than 1 2 in self centering adapters are available for 5 16 in and 3 8 in shafts For shafts larger than 1 2 in adapters are available for 5 8 in 3 4 in and 9 16 in CAUTION Equ...

Страница 4: ... Ground Earth ground is required for proper operation of the ControLinks system Earth ground provides a connection between the subbase and the control panel of the equipment The earth ground must be capable of conducting enough current to blow the fuse or breaker in the event of an internal short 1 Use wide straps or brackets to provide minimum length maximum surface area ground conductors If a le...

Страница 5: ...r is low check the power supply 3 Ensure actuator stroke matches stroke of damper or valve a Remove the cover b Press the button labeled CW The actuator should drive the device clockwise c Press the button labeled CCW The actuator should drive the device counterclockwise 4 If the actuator operates properly check the controller for proper output signals 5 If the actuator does not drive remove power...

Страница 6: ... does not drive replace the actuator 9 If the actuator and device shaft turn freely remount the actuator to the device according to instructions in the Installation section Make sure the actuator does not bind and that the actuator and device are both at the same clockwise or counterclockwise end stop when assembled Hook up the wires and repeat the Checkout procedures Troubleshoot if necessary ...

Страница 7: ...7 65 0239 2 ...

Страница 8: ...well Europe S A Honeywell Latin American Honeywell International Inc Honeywell Limited Honeywell Limitée Control Products 3 Avenue du Bourget Region 1985 Douglas Drive North 35 Dynamic Drive Honeywell Building 1140 Brussels 480 Sawgrass Corporate Parkway Golden Valley MN 55422 Scarborough Ontario 17 Changi Business Park Central 1 Belgium Suite 200 M1V 4Z9 Singapore 486073 Sunrise FL 33325 ...

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