ML6984 Direct Coupled Valve Actuator PRODUCT DATA FEATURES • Allows the use of one common transformer power supply for multiple actuators and controllers • Self-contained, motorized valve linkage • Linkage self-adjusts to valve stroke of up to 19mm (3/4") • Multipose mounting • Strong valve seat closing force 710 Newton (160 lbs.) • Compact size for easy installation in confined area • One device for either Vac or Vdc power supply application • Electronic current sensing provides internal protection and positive full closing force • Field-addable auxiliary switches available • Compatible with 3-wire or 5-wire control systems APPLICATION The ML6984 is a self-contained, self-adjusting, linear motorized linkage that mounts directly onto V5011 two-way or V5013 three-way valves and provides up to 19 mm (3/4") of linear travel (stem lift). For use with low voltage 3-wire SPDT Series 20 (on-off), Series 60 (floating) electromechanical (dry contacts) or electronic (triac) output controllers. Contents Application ........................................................................ Features ........................................................................... Specifications ................................................................... Ordering Information ........................................................ Operation and Checkout .................................................. 1 1 2 2 5 95C-10879-01 ML6984 DIRECT COUPLED VALVE ACTUATOR SPECIFICATIONS IMPORTANT The specifications given in this publication do not include normal manufacturing tolerances. Therefore, an individual unit may not exactly match the listed specifications. Also, this product is tested and calibrated under closely controlled conditions and some minor differences in performance can be expected if those conditions are changed. Shipping Weight: Approx. 1 kg (2.2 lbs) Ambient Rating: Operating Temperature: 0°C to 55°C (32°F to 131°F) Shipping Temperature: -40°C to +65°C (-40°F to 150°F) Relative Humidity: 15% to 95% at 40°C (104°F) Mechanical Ratings: Stroke—19mm (3/4") or less Stroke timing-—Approx. 63 seconds for 3/4" stroke Closing Force—710N (160 lbs.) Nominal* *Rating applies to both directions. Accessories/Parts: 43196000-001—High temperature kit 272630A—Auxiliary switch assembly (1-SPDT) 272630B—Auxiliary switch assembly (2-SPDT) 40003793-005—Mounting hardware bag assembly Acoustic Noise: 55 dBA max. Sound Pressure Level at 1 m (39") distance. Performance Specifications: Minimum Signal Input Duration: 200 milli-secondLife Expectancy—(at rated load and power conditions) 50,000 full stroke cycles plus 1,000,000 repositions at 10% stem travel or 10 years, whichever occurs first. Electrical Ratings: Power supply/consumption: 24V (Nominal), 50/60Hz or 24 to 28 Vdc 6VA(Running), 12VA(Valve seating) ORDERING INFORMATION When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the TRADELINE® Catalog or price sheets for complete ordering number. If you have additional questions, need further information, or would like to comment on our products or services, please write or phone: 1. Your local Honeywell Automation and Control Products Sales Office (check white pages of your phone directory). 2. Honeywell Customer Care 1885 Douglas Drive North Minneapolis, Minnesota 55422-4386 3. http://customer.honeywell.com or http://customer.honeywell.ca In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Toronto, Ontario M1V 4Z9. International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France, Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A. 95C-10879—01 2 ML6984 DIRECT COUPLED VALVE ACTUATOR CAUTION Minimum required control signal input duration is 200 milli-second. Short and rapid cycling/ repositioning will result in possible device lock-up or reduced service life. 7/8 (22) KNOCKOUT 4-1/64 (102) 1/4 – 20 NUT  4 (102) 2 (51) 1/4 – 28UNF 7-3/64 (179) 3-13/64 1-17/32 ( 8 2) (39) 4-9/16 (116) 3-1/16 ( 7 8) 51/64 (21) 4-1/16 (103) 2-3/32 17/64 (53) (7) 1-3/8 (35) MOUNTING DIA. 25/32 (20) 13/64 (6) 3/4 ( 1 9) NOMINAL STROKE 1-21/32 (42) 2-13/64 (56) 3-7/32 (82) 3-3/32 (78) 2-23/32 (69) YELLOW 2-53/64 (72) SILVER 25/64 (10) 3 / 1 6 ( 5 ) DIA. M32553 Fig. 1. Dimensions of Ml6984 valve actuator in mm (inches). Mounting 1. 4 (102) FOR ACTUATORS WITH AUXILIARY SWITCHES 3 (76) 2. 3. 12 (305) 4. MINIMUM MOUNTING CLEARANCE Ensure that the valve body is installed correctly, that is, the arrow points in the direction of the flow. Although the actuator can be mounted in any position, it is preferable that the ML6984 is mounted above the valve body. This will minimize the risk of damage to the ML6984 in the event of condensation or a valve gland leak. Remove the stem button (Fig. 3) from the valve stem. Save the set screw inside the stem button for later installation. The button itself is not needed. Slide the position indicator (plastic disk or rubber Oring) over the valve stem. (See inset, Fig. 3) Indicator will selfalign to the marking on the yoke after one complete operating cycle. Assembly of ML6984 to the valve: 1. 2. M32558 Fig. 2. Minimum mounting clearance. CAUTION 3. Installer must be a trained service technician. DO NOT electrically operate the ML6984 before assembly to the valve because damage not apparent to the installer may occur. 4. 3 The drive shaft of the ML6984 has a threaded hole to link with the valve stem. Slide the yoke over the valve bonnet (Fig. 4) Thread the ML6984 drive shaft onto the valve stem all the way, until it is completely attached (with no threads showing), by turning the valve actuator in a clockwise direction, as viewed from above (depending on the valve models, use a pin or wrench to keep valve stem from turning). Note that the valve actuator is shipped with drive shaft in the midposition. Care should be exercised when using tools on the valve stem during tightening. (Fig. 4) DO NOT damage the threads or other parts of the stem. Orient the conduit hole to the most desirable direction, then tighten the LOCKNUTS on the U-bolt. 95C-10879—01 ML6984 DIRECT COUPLED VALVE ACTUATOR 5. POSITION INDICATOR (PLASTIC DISK) REMOVE STEM BUTTON 6. VALVE STEM Remove the plastic cover from the ML6984 by loosening the two screws located on the top (Note: These screws are captive. Rotate three complete revolutions to remove cover ). Drop either Slot Headed or Allen Hex type of set screw (both are included in the plastic bag ) into the top of the shaft, slotted/ Hexed side up. Or use the set screw from the valve stem button. Depending on which type of set screw was used, with a 5 mm (3/16") Slotted screwdriver or 1/8"x 6" Allen wrench (included in the plastic bag), tighten the set screw to lock valve stem in place (Fig. 6). CAUTION ASSEMBLY OF THE POSITION INDICATOR. For proper valve operation, valve stem must be threaded into the actuator all the way (with no threads showing) and locked in place with the set screw provided. NOTE: DO NOT DAMAGE ANY PART OF THE STEM M32559 Fig. 3. Preparation for valve assembly. M32561 Fig. 5. U-bolt assembly. 1 3/16 (5) SLOTTED SCREWDRIVER OR ALLEN WRENCH DO NOT ADJUST LINKAGE SET SCREW VALVE BONNET U-BOLT 2 YOKE VALVE STEM 1 THREAD ACTUATOR SHAFT TO VALVE STEM BY ROTATING IN A CLOCKWISE DIRECTION. 2 TIGHTEN U-BOLT NUTS TO SECURE LINKAGE TO VALVE BODY. M32560 M32562 Fig. 4. Assembly of Ml6984A to valve. Fig. 6. Locking Ml6984A drive shaft to valve stem. 95C-10879—01 4 ML6984 DIRECT COUPLED VALVE ACTUATOR 3-WIRE CONTROL SYSTEMS TYPICAL ELECTRONIC CONTROLLER 1 L1 H 24 VAC L2 ML6984 1 W 3 T6 R C TYPICAL ELECTRO-MECHANICAL CONTROLLER 1 L1 ML6984 W 24 VAC L2 T5 B 3 R T6 W R B T5 B SIGNAL SOURCE (VDC) 2 3 5-WIRE CONTROL SYSTEM 3 W W ML6984 1 T6 R L1 24 VAC L2 B B T5 OR 3 T6 ML6984 + 28 VDC W ! R B T5 T6 T5 - CAUTION: IN MULTIPLE ACTUATORS CONNECTION, POWER SUPPLY TO ALL ACTUATORS MUST BE CONNECTED IN A TRUE PARALLEL FASHION TO REDUCE EXCESSIVE VOLTAGE DROP. DO NOT “DAISY CHAIN” I.E. CONNECTED TO ONE ACTUATOR THEN BRANCHED TO ANOTHER. 1 ALLOW 0.5 AMPS MAXIMUM FOR EACH DEVICE. ACTUATORS AND CONTROLLER CAN SHARE SAME TRANSFORMER PROVIDING THE VA RATING OF THE TRANSFORMER IS NOT EXCEEDED AND PROPER PHASING IS OBSERVED. 2 SPDT CONTROLLER CAN BE A LOW VOLTAGE SERIES 20 "ON-OFF " OR SERIES 60 "FLOATING" (CENTER-OFF) TYPE. 3 FOR MULTIPLE ACTUATORS CONTROLLED BY A COMMON CONTROLLER IN PARALLEL, THESE ACTUATORS MUST BE WIRED SO THAT THEY ALL TRAVEL IN THE SAME DIRECTION. M32590 Fig. 7. Wiring for ML6984 actuators. The motor is controlled by a microprocessor. Connecting B to R tells the microprocessor to cause the actuator to drive open. Connecting W & R will cause the actuator to drive closed. For "floating" control, if R remains open, the actuator will remain in the last position. CAUTION In multiple actuators connection, power supply to all actuators must be connected in a TRUE parallel fashion to reduce excessive voltage drop. DO NOT "daisy chain" i.e. connected to one actuator then branched to another. At the end of the valve stroke, the actuator will develop the necessary force for positive valve closeoff. As forces are developed, the current to the motor increases. The microprocessor stops the actuator automatically when the motor current, and forces reach the predetermined level. OPERATION AND CHECKOUT The recommended valve actuator power source is a class 2, 24V transformer or 28Vdc across terminals T5 &T6. Internal circuitry provides dc power for the electronic sensing and drive motor circuits. 5 95C-10879—01 ML6984 DIRECT COUPLED VALVE ACTUATOR To replace ML6874: CAUTION 1. 2. 1. Disconnect power supply before beginning installation to prevent electrical shock and equipment damage. 2. All wiring must comply with applicable local electrical codes, ordinances and regulations. 3. Make certain that the voltage and frequency of the power supply correspond to the rating of the device. 4. DO NOT electrically operate the ML6984 before assembly to the valve because damage not apparent to the installer may occur. Checkout: 1. 2. 3. NOTE: For proper operation, voltage on the T5 & T6 must not be less than 22Vac or 24Vdc during running or force generating stages. 4. 5. 6. Replacement Note: 7. 8. To replace ML684: 1. 2. 9. The new ML6984 is a direct replacement for the old ML684A in single actuator or parallel multiple actuators hook-up. The old and new actuators can be mixed in the same electrical circuit. For multiple actuators controlled by a common controller in parallel, these actuators must be wired so that they all travel in the same direction. When replacing the ML684A1009 (80 lbs ) with this new ML6984 on the V5045 valve. The already installed valve adaptor (part # 272629A) on the valve stem and actuator assembly is still needed. 95C-10879—01 The new ML6984 is a direct replacement for the old ML6874 in single actuator hook-up. For parallel multiple old ML6874 actuators applications, an isolation relay must be used (isolation relay contacts should be placed in the new ML6984 actuator signal input "W" and "B" circuit). 6 Make sure the valve stem is completely screwed into the actuator drive shaft with no threads showing. Make sure the valve stem is locked in place with the set screw. With 24 Vac or 28Vdc power supply connected to T5 & T6. Jumper R & B. The valve stem should move up. Jumper R & W. The valve stem should move down. For Floating operation, open R connection. Valve stem should remain in position. Re-connect all control wiring. Operate the system (valve, actuator and controller) for several cycles to ensure proper installation. When checkout is complete, return the controller to the desired setting. ML6984 DIRECT COUPLED VALVE ACTUATOR 7 95C-10879—01 ML6984 DIRECT COUPLED VALVE ACTUATOR Automation and Control Solutions Honeywell International Inc. 1985 Douglas Drive North Golden Valley, MN 55422 customer.honeywell.com ® U.S. Registered Trademark © 2011 Honeywell International Inc. 95C-10879—01 M.S. Rev. 07-11 Printed in U.S.A.
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