Honeywell ML6874 Automobile Parts User Manual
Contents
1. desired setting At the end of the valve stroke the actuator will develop the necessary force for positive valve close off 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 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 connect 24 Vac between any signal input terminals 5 DO NOT electrically operate the ML6874 before assembly to the valve because damage not apparent to the installer may occur GENERAL NOTE 1 For correct valve operation the ML6874 must be field configured with the DIP switches which are located beside the terminal block see wiring diagrams for details Turn power off before setting the DIP switches 2 There is a short delay in actuator response upon every signal change It is to screen any unwanted incoming signals 3 For proper operation voltage on the T5 amp T6 must not be less than 22Vac or 24Vdc during running or force generating stages Honeywell Home and Building Control Home and Building Control Helping You Control Your World Honeywell Limited Limitee Honeywell Inc 155 Gordon Baker Road2. in any position it is preferable that the ML6874 is mounted above the valve body This will minimize the risk of damage to the ML6874 in the event of condensation or a valve gland leak 3 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 4 Slide the position indicator plastic disk or rubber O ring over the valve stem See inset Fig 3 Indicator will self align to the marking on the yoke after one complete operating cycle ey of ML6874 to the valve The drive shaft of the ML6874 has a threaded hole to link with the valve stem Slide the yoke over the valve bonnet Fig 4 2 Thread the ML6874 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 mid position 3 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 4 Orient the conduit hole to the most desirable direction then tighten the LOCKNUTS on the U bolt ML6874 INSTALLATION Position_Indicator Plastic Disk Remove Stem Button NOTE 00 NOT DAMAGE ANY PART OF THE STEM Assembly of the pos
3. to ML684A1025 160 Ibs in single actuator hook up drive open i e UP in the Direct Acting Mode except when replacing the old reverse acting models the Connecting W amp R will cause the actuator to drive closed signal input wires to the new devices are no longer i e DOWN in the Direct Acting Mode For floating needed to be reversed Just set the DIP switch as shown in control if R remains open the actuator will remain in the Fig 7 last position The DIP switches are scanned only on power 3 DO NOT replace the ML684A1009 80 lbs with this up and tell the microprocessor if Direct or Reverse mode new ML6874 on the V5045 valve is desired Changes in the DIP switch setting will only take effect if the power is off while the change is made oe see General amp Replacement Note Make sure the valve stem is completely screwed into the actuator drive shaft with no threads showing 2 Make sure the valve stem is locked in place with the set screw 3 Check DIP switches for proper setting for Direct or Reverse Acting mode 4 Connect R amp B Valves stem should move up in Direct AN CAUTION Acting mode 5 Connect R amp W Valves stem should move down in Direct Acting mode 6 For Floating operation open R connection Valve stem should remain in position 7 Operate the system valve actuator and controller for several cycles to ensure proper installation 8 When checkout is complete return the controller to the
4. 1985 Douglas Drive North North York ON Golden Valley MN 55422 Canada M2H 3N7 www honeywell com building components
5. GENERAL The ML6874 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 or Series 60 floating controllers PCY 02 98 Honeywell Ltd 1998 Printed in Canada Honeywell ML6874 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 Ibs Compact size for easy installation in confined area Field configurable DIP switches for Direct Reverse action 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 Contents Specifications issii 2 Order informMation cccccccccessseeeeee 2 InStallation ccccccesccseessesceeeessssteeeees 3 Wiring Schematics eeen 5 Operation and Checkout ccccccees 6 95C 10865 ML6874 SPECIFICATIONS ORDERING INFORMATION IMPORTANT The specifications given in this publication do not include normal manufacturing tolerances Therefore an individual unit may not exactly match the li
6. ition indicator FIG 3 PREPARATION FOR VALVE ASSEMBLY 5 Remove the plastic cover from the ML6874 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 6 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 N WARNING g S FIG 5 U BOLT ASSEMBLY BLAA h Yy Valve Bonnet U bolt A Yoke A Thread Actuator shaft to valve stem by rotating in a clockwise direction A Tighten U bolt nuts to secure linkage to vaive body FIG 4 ASSEMBLY OF ML6874A TO VALVE 5 mm 3 16 in Slotted Screwdriver Yy OR Allen Wrench Linkage Set Screw Valve Stem FIG 6 LOCKING ML6874A DRIVE SHAFT TO VALVE STEM ML6874 WIRING A SPDT Controller ZN ML6874 L N Caution In multiple actuators connection power supply to all actuators must be connected in a TRUE parallel fashion ha giaa ae e e a 5 to reduce excessive voltage drop DO NOT daisy chain i e connected to one actutator then branched to another A Allow 0 5 amps maximum for each device Ac
7. ring number or specify 1 Model number 2 Valve body type and model number 3 Accessories if desired 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 Home and Building Control Sales office check white pages of your phone directory 2 Home and Building Control Customer Relations Honeywell Limited Honeywell Limit e 35 Dynamic Drive Scarborough Ontario MIV 429 In U S A Honeywell 1885 Douglas Drive North Minneapolis Minnesota 55422 4386 International Sales Offices in all principal cities of the world Manufacturing in Australia Canada Finland France Germany Japan Mexico Netherlands Spain United Kingdom U S A ary dris hrad TO wa 4 t Sji ML6874 SPECIFICATIONS INSTALLATION FIG 1 DIMENSIONS OF ML6874 VALVE ACTUATOR IN MM INCHES 10 cm 4 in_ for Actuators with auxiliary switches 8cm 3 in we tee neceye t Minimum Mounting Clearance FIG 2 MINIMUM MOUNTING CLEARANCE AN CAUTION 1 Installer must be a trained service technician 2 DO NOT electrically operate the ML6874 before assembly to the valve because damage not apparent to the installer may occur Installation ove Ensure that the valve body is installed correctly that is the arrow points in the direction of the flow 2 Although the actuator can be mounted
8. sted 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 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 Acoustic Noise 55 dBA max Sound Pressure Level at 1 m 39 distance Electrical Ratings Power supply consumption 24V Nominal 50 60Hz or 24 to 28 Vdc 6VA Running 12VA Valve seating Shipping Weight Approx kg 2 2 Ibs Specifications Accessories Parts 272630A Auxiliary switch assembly 1 SPDT 272630B Auxiliary switch assembly 2 SPDT 272775 _ Replacement motor brush kit 40003793 003 Mounting hardware bag assembly Mechanical Ratings Stroke 19mm 3 4 or less Stroke timing Approx 63 seconds for 3 4 stroke Closing Force 710N 160 Ibs Nominal Rating applies to both directions Performance Specifications Life 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 Note rapid cycling repositioning will result in reduced service life of the actuator Ordering Information When purchasing replacement and modernization products from your wholesaler or distributor refer to the price sheets for complete orde
9. tuators and controller can share same transformer providing the VA rating of the transformer is not exceeded and proper phasing is observed Use configuration DIP switches to select device functions Direct acting function actuator stem moves upwards J with R amp B closed or Reverse acting function actuator stem moves downwards with R amp B closed DO NOT reverse wiring LZ SPDT controller can be a low voltage Series 20 on off or Series 60 floating center off type Configuration FUNCTION DIP SWITCH CONFIGURATION DIP switches located adjacent Direct Acting Mode to the input terminal block Reverse Acting Mode NOTE Turn power off before setting the DIP switches Fig 7 Wiring for SPDT controller to ML6874 actuators ML6874 OPERATION AND CHECKOUT Operation and checkout Operation The recommended valve actuator power source is a class REPLACEMENT NOTE 2 24V transformer or 28Vdc across terminals T5 amp T6 Internal circuitry provides de power for the electronic 1 The old ML684 actuators cannot be used with new sensing and drive motor circuits ML6874 valve actuators in the same circuitry unless they are isolated by an isolation relay to prevent cross talking The motor is controlled by a microprocessor Connecting 2 The ML6874 is a direct replacement for the old B to R tells the microprocessor to cause the actuator
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