SKD U Electronic Valve Actuator

Size: px

Start display at page:

Download "SKD U Electronic Valve Actuator"

Alyson Brooke Pearson
7 years ago
Views:

1 Document No April 22, 2 SKD U Electronic Valve Actuator Product Description The SKD U actuator requires a 24 Vac supply signal to control a Flowrite 599 Series valve with a /4-inch (2 mm) stroke. Product Numbers Non-Spring Return SKD6U SKD82.5U Spring Return SKD62U SKD82.5U Warning/Caution Notations WARNIN: CAUTION: Required Tools Personal injury or loss of life may occur if you do not follow a procedure as specified. Equipment damage or loss of data may occur if you do not follow a procedure as specified. 5 mm Allen wrench Small and medium flat-blade screwdrivers Expected Installation Time 2 minutes for factory installed actuator 45 minutes for field replacement of actuator Prerequisites WARNIN: If mounting the actuator to a valve already in line, either close the shut-off valves in the piping (upstream first, then downstream) or switch off the pump to allow the differential and static pressure in the valve to drop. Mounting Positions EA92R Not allowed with the Weather Shield Not allowed in any circumstance Figure. Acceptable Mounting Positions. Using the Weather Shield The SKD must be in the vertical position. Complete instructions for the mounting of the Weather Shield are included with that product. NOTE: Use the top knockout position when installing the Weather Shield. See Figure 6. EA857R VENTILATION OPENINS VENTILATION OPENINS Figure 2. Weather Shield Installation Position. Installation If you are mounting an actuator on a new valve, begin with the instructions in Figure. Item Number: , Rev. BA Page of 6

2 Document No April 22, 2 Removing the Actuator from the Valve. Remove the actuator cover. 2. Disconnect the wires and conduit, if installed.. Loosen the valve stem retainer using a 5 mm Allen wrench and lower the valve stem into the valve. 4. Loosen the yoke nuts using a 5 mm Allen wrench in the actuator yoke. 5. Remove the actuator from the valve, being careful not to damage the valve stem. Continue with Mounting an Actuator to a Valve. Figure 6. NOTE: Hold the stem retainer in place as you tighten it around the valve stem. See Figure 6. 5 Figure. Preparing a new Valve. EA8R2 5 mm 6 MAX. TORQUE 4 lb-in (4.5 Nm) 6 Mounting an Actuator to a Valve. Figure 7. NOTE: Install the packing heating element, (P/N ), if used, before proceeding. NOTE: Position the actuator to accommodate the wiring. Hold the actuator in place while tightening the yoke nuts. See Figure 7. 7 Figure 4. 2 Figure 8. NOTE: Make sure the yoke nuts are loose enough to allow the actuator to slip over the bonnet. See Figure 5. 4 Page 2 of 6 Figure 5. Siemens Industry, Inc.

3 AC 24 V Document Number: April 22, 2 Wiring B (SP) F CAUTION: Use care when removing the knockout. Do not damage the circuit board. B M B M N 2 Do not use autotransformers. Use earth ground isolating step-down Class 2 transformers. Determine supply transformer rating by summing total VA of all actuators used. The maximum rating for a Class 2 power supply circuit is VA. EA74R Y M Y M U Z Y (SN) B Sensor F Temperature Limiter N Controller Y Actuator Actuator Power Consumption Actuators Per Class 2 Supply Circuit* (8% of Transformer VA) SKD6 U 7 VA 4 SKD82.5U VA 8 SKD82.5U 8 VA 5 * Operating more actuators requires additional transformers or separate VA power supplies. Wiring Diagrams SKD6U/SKD62U Figures 9 and SKD82.5U/5U Figures through SKD6 U Figure. Connecting Terminals Y Z M U 24 Vac System Potential (SP) System Neutral (SN) Control Input: to Vdc or 4 to 2 ma (DIP switch selectable) Override Control (See Technical Instructions 55-8P25) Measuring Neutral Output for to Vdc or 4 to 2 ma measuring voltage. It will match the input signal type. Connection Terminals Calib. The position output signal U will switch from to Vdc to 4 to 2 ma when a 4 to 2 ma input signal is selected and used on the terminal Stroke Calibration Y M U Z AC 24V 5/6Hz... V mA Chm Status Calib. Status reen Red OK Calib. Error Valve Jam LED Status Indication DIP Switches Functions See Below EA68R Wiring for SKD82 U Y 2 DIP Switches 2 Figure 9. SKD6 U. Selection of Control Signal 2 Selection of Flow Characteristic ON 4 to 2 ma Modified* OFF (Factory Setting) to Vdc Default EA94R2 Figure. Location of Terminals. *Changing the default setting will modify an equal percentage valve to a linear flow characteristic. When set to default, the flow characteristic is determined by the valve body. Siemens Industry, Inc. Page of 6

4 Document No April 22, 2 CONTROLLER NEUT Y 24 Vac EARTH ROUND ISOLATIN CLASS 2 TRANSFORMER FOR 24 Vac POWER EA745R CONTROLLER NEUT 2 Y 24 Vac EARTH ROUND ISOLATIN CLASS 2 TRANSFORMER FOR 24 Vac POWER 2 Vac EA746R 2 Vac 2 Y % % a b c % % EA448R2 Y % % Cm c 4 5 c2 4 5 ASC9.DU a b c ASZ7. % % Figure 2. Non-Spring Return SKD82.5U. Connecting Terminals System Potential 24 Vac (+) Y Outward movement of coupling piece ( to ) Inward movement of coupling piece ( to ) Cm Limit switch for % stroke c ASC9.DU double auxiliary switch c2 ASC9.DU double auxiliary switch Ω ASZ7. potentiometer The diagram shows all possible connections. How many and which are used depend on the application. EA447R2 N.O. Cm c c ASC9.DU ASZ7. Figure. Spring Return SKD82.5U. Connecting Terminals System Potential 24 Vac (+) 2 System Neutral (SN) Y Outward movement of coupling piece ( to ) Inward movement of coupling piece ( to ) Cm Limit switch for % stroke c ASC9.DU double auxiliary switch c2 ASC9.DU double auxiliary switch Ω ASZ7. potentiometer The diagram shows all possible connections. How many and which are used depend on the application. Start-Up Check the wiring for proper connections. Consult Technical Instructions 55-8P25 for detailed commissioning information. Normally Closed Valve Actuator pressure cylinder moves: Outward ( to ): Valve opens. Inward ( to ): Valve closes. Normally Open Valve Actuator pressure cylinder moves: Outward ( to ): Valve closes. Inward ( to ): Valve opens. Three-Way Valve Actuator pressure cylinder moves: Outward: Valve opens between port NC and C. Inward: Valve opens between ports NO and C. Page 4 of 6 NOTE: The valve body assembly determines the complete assembly action. Siemens Industry, Inc.

5 Document Number: April 22, 2 Manual Operation >x6 << AUTO >> Dimensions -/4 (285) EA8R << MAN >> << AUTO >> Figure 4. Manual Override in Manual and Automatic Position. Each complete revolution (6 ) is equal to /2-inch (2.5 mm) stroke. 8-/6 (224) Reference Technical Instruction Document Number 4-/6 (22) 4-/6 (22) 2-9/6 (65) Flowrite EA599 Series SKD Electronic Valve Actuator Proportional Control 55-8P25 Flowrite EA599 Series SKD Electronic Valve Actuator -position(floating) Control 55-8P25 2-7/8 (27) 9-/8 (22) 4-/2 (4) /4 (9) -5/6 (49) EA854R 5 (26) Figure 6. Dimensions of the Weather Shield in inches (mm). Figure 5. Valve Stem Travel Indication. Siemens Industry, Inc. Page 5 of 6

6 Document No April 22, 2 Dimensions, Continued CAUTION: Be careful when removing the knockout. Do not damage the circuit board. NOTE: Use the top knockout position when installing the Weather Shield. SERVICE ENVELOPE MINIMUM ACCESS SPACE RECOMMENDED 4 inch ( mm) 8 inch (2 mm) Figure 7. SKD U Dimensions in Inches (mm). Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as design improvements are introduced. Flowrite is a trademark of Siemens Industry, Inc. Other product or company names mentioned herein may be the trademarks of their respective owners. 2 Siemens Industry, Inc. Siemens Industry, Inc. Building Technologies Division Deerfield Parkway Buffalo rove, IL USA Tel Your feedback is important to us. If you have comments about this document, please send them to sbt_technical.editor.us.sbt@siemens.com Document No Printed in the USA Page 6 of 6

SKP Series SKP15U.. Gas Valve Actuator with Safety Shutoff Function

SKP Series SKP15U.. Gas Valve Actuator with Safety Shutoff Function Document No. 155-751 SKP15U.. Description Only when assembled to Series VGU Gas valves SKP15 electro-hydraulic actuators combine with