Honeywell ML6421 Automobile Parts User Manual
Contents
1. Bourget Honeywell Building 1140 Brussels 17 Changi Business Park Central 1 Belgium Singapore 486073 Printed in U S A on recycled amp paper containing at least 10 post consumer paper fibers Honeywell Europe S A Honeywell Latin American Region 480 Sawgrass Corporate Parkway Suite 200 Sunrise FL 33325 www honeywell com2. and control wires to the actuator Make sure that all wiring is correct 3 For the ML7421 only Check selector plugs for proper settings See Signal Input Failure section for details 4 When wiring is complete replace the actuator cover and control knob see Fig 9 5 Apply power and control signals to the actuator Fig 4 Connecting wiring to the actuator ML6421 ML7421 NON SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS ML6421A B L1 HOT A A POWER SUPPLY PROVIDE DISCONNET MEANS AND OVERLOAD PROTECTION AS REQUIRED A ALL WIRING BLOCKS HAVE THE SAME NUMBER OF TERMINALS 8 BUT THE ONLY TERMINALS THAT ARE ACTIVE ON THIS BLOCK ARE T1 W AND B THE R W B AND T Y G TERMINALS ARE A SIX TERMINAL WIRING BLOCK SEPARATE FROM THE i MAIN BLOCK THEY DO NOT APPEAR ON ALL r MODELS BECAUSE R W B ARE FOR A SINGLE FEEDBACK POTENTIOMETER AND T Y G ARE FOR A SECOND FEEDBACK POTENTIOMETER BOTH POTENTIOMETERS ARE 220 OHMS THE REQUIRED WIRING BLOCKS ARE PART OF THE A POTENTIOMETER ACCESSORY KITS M17433 Fig 5 ML6421 typical wiring diagram ML7421 POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED 0 TO 10 OR 2 TO 10 VDC CONTROL SIGNAL M17434A DEPENDING ON ACTUATOR MODEL Fig 6 ML7421 typical wiring diagram ML7421 TRANSFORMERS T775 WITH 2 TO 10 VDC OUTPUT A POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS RE
3. valves used in steam applications d Rating is for steam at maximum 100 psi Ratings for water applications are the same as for the V5011N1xxx 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 Home and Building Control Sales Office check white pages of your phone directory 2 Home and Building Control Customer Relations Honeywell 1885 Douglas Drive North Minneapolis Minnesota 55422 4386 In Canada Honeywell Limited Honeywell Limit e 35 Dynamic Drive Scarborough Ontario M1V 429 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 63 2515 4 2 ML6421 ML7421 NON SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS ML6421A ML7421A 7 178 X 7 178 14 1 4 360 MINIMUM CLEARANCE 2 7 8 22 239 K YOKE DIAMETER 1 3 8 35 ML6421B ML7421B 7 178 X7 178 gt I lt 2 1 2 64 16 7 8 430 MINIMUM CLEARANCE 326 iene 2 7 8 22 11 7 8 M17430 l xX YOKE DIAMETER 1 7 8 48 Fig 1 Approx
4. Draws stem upward 43191679 102 Single Auxiliary Potentiometer for ML6421B ML7421 0 to 10 Vdc or 2 to 10 Vdc 43191679 103 Dual Auxiliary Potentiometer for ML6421A 43191679 104 Dual Auxiliary Potentiometer for ML6421B 43191680 102 Dual Auxiliary Switch for 24 Vac use only 43196000 001 High Temperature Kit for actuators with 3 4 in stroke Increases maximum temperature to 428 F 220 C Stem Force 405 Ibf 1800N 43196000 102 High Temperature Kit for actuators with 1 1 2 in stroke Increases maximum temperature to 428 F 220 C Actuator Material Cover ABS plastic Yoke and Base Diecast aluminum Table 1 Close off Ratings for ML6421 ML7421 Electric Linear Valve Actuators and Honeywell Valves psi Type Valve 1 2 in 3 4 in 1 in 1 1 4 in 1 1 2 in 2 in 2 1 2 in 3 in 4 in 5 in 6 in Flange V5011A B C E 2 J Z I7 53 23 m8 M2 V5011B T Sg oe ee V3350 51 60 61 V3450 51 60 61 l fegt 45 250 4eb 446 NPT V5011F G 450 150 150 150 150 l150 100 6 amp 1 h V5011N1xxx V5011N3xxx 230 230 230 230 230 126 V5013N V5011N2xxx 1004 1009 100 1009 1009 1009 V5013F 150 150 150 150 150 150 a For use with ML6421B or ML7421B Actuators only b Represents maximum pressure difference between the outlet and either of the two inlets Do not exceed 100 psi with V5011G
5. Honeywell ML6421 ML7421 Non Spring Return Electric Linear Valve Actuators APPLICATION The ML6421A B Non Spring Return Electric Linear Valve Actuators are suitable for use with low voltage single pole double throw spdt Series 60 two position and floating controllers These actuators operate standard Honeywell valves in heating ventilating and air conditioning HVAC applications The ML7421A B Non Spring Return Electric Linear Valve Actuators are modulating control actuators used with controls that provide an analog output of 0 to 10 Vdc or 2 to 10 Vdc These actuators operate standard Honeywell valves in HVAC applications An internal selector plug can be used to reverse the direction of action U S Registered Trademark Copyright 2002 Honeywell All Rights Reserved PRODUCT DATA FEATURES e Quick and easy installation e No separate linkage required e 3 4 in 20 mm stroke on ML6421A and ML7421A e 1 1 2 in 38 mm stroke on ML6421B and ML7421B e No adjustments required e Accurate valve positioning e Low power consumption e Selectable 0 2 to 10 Vdc or 0 4 to 20 mA input signal with ML7421 e Position feedback with ML7421 e High close off ratings e Direct reverse acting with ML7421 e Force limiting end switches e Manual operator e Synchronous motor e Corrosion resistant design e Maintenance free e Conduit connector knockout Contents ApplicatiON sirisser easier ie a
6. QUIRED M17435A Fig 7 ML7421 wiring using voltage input control and separate transformers ML7421 SINGLE TRANSFORMER 40 VA 24 VAC T775 WITH 2 TO 10 VDC OUTPUT POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED M17436A Fig 8 ML7421 wiring using voltage input control and a common transformer M17464 Fig 9 Replacing actuator cover Auxiliary Potentiometers The 43191679 Auxiliary Potentiometers can be used as feed back potentiometers and to provide remote indication of the valve position See the Accessories section for part numbers See Installation Instructions packed with the potentiometers for details Auxiliary Switches The 43191680 Dual Auxiliary Switch can be used on both the ML6421 and ML7421 Electric Linear Valve Actuators Switching points are adjustable over the full actuator stroke For example the switch can be used to switch pumps or to provide remote indication of any stroke position See the Installation Instructions packed with the auxiliary switch for details IMPORTANT Use the 43191680 Dual Auxiliary Switch only with 24 Vac applications 63 2515 4 ML6421 ML7421 NON SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS OPERATION General The drive of the actuator synchronous motor is converted into the linear motion of the actuator stem by using a worm gear transmission A button retainer clip connects the actuator stem to the valve stem T
7. g output signal 2 to 10 Vdc that represents the actual actuator stem position is available at Terminal F It can be used for remote indication of the stem position With the actuator stem fully down the output signal is 10 Vdc The output of the signal does not change when the actuator action reverses using W3 or W4 see Signal Input Failure section and Fig 11 w3 Wi 10V 20mA 0 50 100 C v 4 10V 20mA 2 10V 0 10V 4 20mA 0 20mA AN SN M17437 Fig 11 Location of selector plugs ML6421 ML7421 NON SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS Actuator Override To override the control signal for freeze protection or similar applications connect the 24 Vac common T2 to either terminal O1 or O2 Connecting to terminal O1 fully extends the actuator stem Connecting to O2 fully retracts the actuator FEEDBACK stem ML7421 The control signal is ignored when the override signal is applied to terminal O1 or O2 This override can be achieved with a switch or a relay See Fig 12 Direction of Action The direction of action can be changed by repositioning the selector plug W3 POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED 2 10 Vde FEEDBACK SIGNAL SEE OUTPUT SIGNAL FEEDBACK SECTION 0 10Vde OR 2 10 Vdc CONTROL SIGNAL SEE SIGNAL INPUT SECTION SEE OVERRIDE SECTION FOR DETAILS ON OVERRIDE OPERATION M17438 Fig 12 Connections for overriding contr
8. he internal force sensor using installed microswitches turns off the actuator when the specified stem force is reached Manual Operation The ML6421 and ML7421 are equipped with a manual operator knob see Fig 10 to open or close the valve in the event of power failure 1 Turn off or disconnect the power supply before manually operating the actuator 2 Push down on the manual operator knob and turn the knob a Counterclockwise to drive the stem downward b Clockwise to draw the stem upward IMPORTANT Manual operation allows very high closing force that can jam the actuator spindle exceed the force switch ratings and stop the motor After a manual valve close off operation release the spindle one turn by turning the manual operator knob This will ensure automatic disengagement of the manual operator upon power resumption NOTE Ifthe manual operator knob is not pushed in while turned it will rotate only a short distance before disengaging without power resumption Fig 10 Manual operator knob 63 2515 4 6 ML7421 Signal Input Failure Using selector plug W1 the actuator can be set to run to one of three positions in event of a signal failure 0 Actuator position corresponds with 0 or 2 Vdc signal 50 Actuator stem in mid position e 100 Actuator position according to 10 Vdc signal NOTE If W4 is set to the mA position the actuator always runs to 0 percent Output Signal Feedback F An analo
9. imate dimensions of ML6421 ML7421 Electric Linear Valve Actuators in in mm INSTALLATION men Installing this Product Read instructions carefully Failure to follow them could damage the product or cause a hazardous condition 2 Check ratings and description given in the specifications to make sure the product is suitable for your application 3 Installer must be a trained experienced service technician 4 After installation is complete check out product operation as provided in these instructions CAUTION Electrical Shock or Equipment Damage Hazard Can shock individuals or short equipment circuitry Disconnect power supply before installation Location Install the actuator in a location that allows enough clearance for mounting accessories and for servicing CAUTION Equipment Damage Hazard Can damage actuator due to condensation or a valve gland leak Install the actuator in a position above horizontal 63 2515 4 ML6421 ML7421 NON SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS Mounting 1 Place the actuator on the valve with the U bolt around the valve collar See Fig 2 IMPORTANT When tightening the set screws first tighten the right set screw See Fig 2 Place the U bolt against the valve collar and secure the actuator to the valve by turning each U bolt nut clock wise NOTE To assure even pressure on the collar first tighten the nuts finger tight and then alternate tu
10. ol signal to drive actuator to a specific position CHECKOUT The actuator can be checked out either directly or using a controller Direct Checkout Controller Checkout 1 Mount the actuator for the required application 1 Adjust the setpoint of the controller to call for opening or 2 Check the valve position and make sure that 24 Vac is closing the valve Observe the actuator correctly applied to the actuator 2 If the valve is closed it should begin to open 3 Apply the control signal to the appropriate leadwires to 3 If the valve remains closed move the setpoint further move the valve in the required direction toward the open setting 4 Ifthe actuator does not move make sure the actuator is 4 Ifthe valve does not move check for 24 Vac in the properly installed actuator power input 5 Ifthe actuator is correctly installed and does not run 5 If 24 Vac is present and the actuator does not operate replace the actuator reverse the controller leadwires to determine if the device is incorrectly wired 6 If wiring is correct 24 Vac is present on the power input terminals and the actuator does not run replace the actuator 7 63 2515 4 Honeywell Automation and Control Solutions Honeywell 1985 Douglas Drive North Golden Valley MN 55422 Honeywell Limited Honeywell Limit e 35 Dynamic Drive Scarborough Ontario MIV 4Z9 63 2515 4 B B Rev 1 03 Honeywell International Control Products 3 Avenue du
11. rning each U bolt nut until both are snug Push aside the stem button retaining clip and hold See Fig 2 Lift the valve stem until the head of the valve stem button is inside the large slot of the stem button retaining clip on the actuator Release the stem button retaining clip to secure the stem button Check to make certain the stem button is secured by the retaining clip Pull off the manual operation knob Remove the cover from the actuator using a Phillips or crosspoint screwdriver See Fig 3 TIGHTEN RIGHT SET SCREW FIRST M17432 Fig 3 Removing actuator cover 63 2515 4 4 Wiring CAUTION Electrical Shock or Equipment Damage Hazard Can shock individuals or short equipment circuitry Disconnect power supply before installation IMPORTANT 1 All wiring must comply with local electrical codes ordinances and regulations 2 Voltage and frequency of the transformer used with the actuator must correspond with the characteristics of the power supply and those of the actuator NOTE See Fig 5 through 8 for typical wiring hookups 1 Feed power and control wires through the conduit connector located on the bottom of the actuator case CAUTION Equipment Damage Hazard Conduit connection or removal can break an unsupported connector When removing or attaching conduit use a wrench to support the motor connector 2 Using the appropriate wiring diagram see Fig 5 through 8 connect power
12. ti e eae ds 1 Features is cdsscctesssagcccscgstngsagenednidenssnats taeassseenegitaessiaignaansanel 1 SPCCIICALIONS pansioni onosi ea a aE EENS 2 Ordering Information 0 0 eee eeeeeeeeneeeeeneeeeeeeeeeeeneeeeees 2 Installation osiensa uted cies eitea Eiaa EA 3 OPEratOM eerden naia paa riae tee eaei sesedeeds eleseddatsteategaceedaac 6 CRECKOUL E EE 7 Fs cE MANNA ML6421 ML7421 NON SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS Models Close off Pressure Ratings See Table 1 Stroke in Run Time in Cable Entry Two knockout holes for 1 2 in conduit standard Model in mm sec at 60 Hz Description on actuator case ML6421A 3 4 20 95 Electric Linear Ambient Ratings Valve Actuator Temperature METAI Ambient Range 14 F to 122 F 10 C to 50 C ML6421B 1 1 2 38 175 Storage Range 40 F to 158 F 40 C to 70 C ML7421B Humidity Range 5 to 95 percent relative humidity noncondensing Dimensions See Fig 1 Approvals Weight 5 1 Ib 2 3 kg Canadian Standards Association Listed Underwriter s Laboratories Inc UL94 5V Flame Retardant file E181716 Meets CE requirements Protection Standard IP54 Electrical Ratings Power Input 24 Vac 10 15 60 Hz Power Consumption 11 VA maximum at 24 Vac Signal Inputs ML6421 Accessories 24 Vac across T1 and W Drives stem downward 43191679 101 Single Auxiliary Potentiometer for ML6421A 24 Vac across T2 and B
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