Installation Instructions Document No. 129-368 September 25, 2018 SKB/C62UA Series Electronic Valve Actuator with Advanced Features Item Number 129-368, Rev. CA Page 1 of 8 Product Description The SKB/C62UA valve actuators require a 24 Vac supply and receive a 0 to 10 Vdc or 4 to 20 mA control signal to proportionally control a valve. These actuators work with Flowrite™ 599 Series valves or other manufacturer's valves with the appropriate Universal Valve Linkage Kit. Product Numbers SKB62UA 3/4-inch (20 mm) stroke SKC62UA 1-1/2-inch (40 mm) stroke Warning/Caution Notations WARNING: Personal injury or loss of life may occur if you do not follow procedure as specified. CAUTION: Equipment damage or loss of data may occur if you do not follow a procedure as specified. Required Tools • 24 mm open-end wrench • 3/8-inch open-end wrench • No. 1 Phillips or flat-blade screwdriver • Small adjustable wrench Expected Installation Time 20 minutes for factory installed actuator 46 minutes for field replacement of actuator Prerequisites WARNING : 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. CAUTION: Do not damage or scratch the polished surface of the valve stem. Figure 1. Acceptable Mounting Positions. The vertical position is recommended for mounting and the only position for the NEMA Type 3R rating with the Weather Shield. Figure 2. SKB/C Weather Shield. Using the Weather Shield The SKB/C62UA actuator is UL listed to meet NEMA Type 3R requirements (a degree of protection against rain, sleet, and damage from external ice formation) when installed with the Weather Shield, product number 599-10065, and outdoor-rated conduit fittings. The SKB/C62UA must be in the vertical position. Complete instructions for the mounting of the Weather Shield are included with that product. See Figure 28 for Weather Shield dimensions. Document No.129-368 Installation Instructions September 25, 2018 Page 2 of 8 Siemens Industry, Inc. Installation If you are mounting an actuator on a new valve, begin with the instructions in Figure 7. Removing the Actuator from the Valve Figure 3. Figure 4. Figure 5. Figure 6. Preparation for Mounting an Actuator on a Valve. Figure 7. Preparing a New Valve. NOTE: Install the stem heating element (P/N ASZ6.6), if used, before proceeding to Figure 9. Figure 8. Document Number: 129-368 Installation Instructions September 25, 2018 Siemens Industry, Inc. Page 3 of 8 Preparation for Mounting an Actuator on a Valve, Continued Figure 9. NOTE: Place the narrow opening end of the nut over the valve stem first. Figure 10. NOTE: Be careful not to break the washer. Figure 11. Mounting an Actuator to a Valve NOTE: Install the stem heating element, (P/N ASZ6.6), if used, before proceeding. Figure 12. Figure 13. Figure 14. 4 5 6 Document No.129-368 Installation Instructions September 25, 2018 Page 4 of 8 Siemens Industry, Inc. Mounting an Actuator to a Valve, Continued Position the actuator to accommodate the wiring. Hold the actuator in place while tightening the retaining clamp. See Figure 15. Figure 15. Figure 16. Figure 17. Figure 18. Figure 19. Figure 20. Figure 21. 2 Document Number: 129-368 Installation Instructions September 25, 2018 Siemens Industry, Inc. Page 5 of 8 Wiring CAUTION: Use care when removing the knockout. Do not damage the circuit board. Use the top knockout position. Do not use autotransformers. Use earth ground isolating step-down Class 2 transformers. Determine supply transformer rating by summing the total VA of all actuators used. The maximum rating for a Class 2 step-down transformer is 100 VA. Actuator Power Consumption Actuators per Class 2 Supply Circuit * (80% of transformer VA) SKB62UA 17 VA 4 SKC62UA 28 VA 2 * Operating more actuators requires additional transformers or separate 100 VA power supplies. Figure 22. Wiring for SKB/C62UA is shown in Figure 23 and Figure 24. 1 2 3 4 Figure 23. SKB/C62UA. DIP Switches (From Left to Right) 1 Select Direction of Operation 2 Sequence Control or Stroke Limit Control 3 Selection of Control Signal 4 Selection of Flow Characteristic ON Reverse-acting Sequence control 4 to 20 mA Modified* OFF (Factory Settings) Direct-acting Stroke limit control 0 to 10 Vdc Default *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.Document No.129-368 Installation Instructions September 25, 2018 Page 6 of 8 Siemens Industry, Inc. Wiring Figure 24. Wiring Diagram. Connecting Terminals 24 Vac G System Potential (SP) G0 System Neutral (SN) Y Control Input: 0 to 10 Vdc or 4 to 20 mA (DIP switch selectable) Z Override Input (See Technical Instructions 155-717) M Measuring Neutral U Position Indicator: 0 to 10 Vdc or 4 to 20 mA The position output signal U will switch from 0 to 10 Vdc to 4 to 20 mA when a 4 to 20 mA input signal is selected and used on the terminal. Start-Up • Check the wiring for proper connections. • Consult the Flowrite 599 Series SKB/C/D 62UA Series Electronic Valve Actuator 24 Vac Proportional Control Advanced FeaturesTechnical Instructions 155-717 for detailed commissioning instructions. Stroke Calibration To determine the stroke positions 0 and 100% in the valve, calibration is required when the valve/actuator are commissioned for the first time. The actuator must be mechanically connected to a valve and must have a supply voltage of 24 Vac. The calibration procedure can be repeated as often as necessary. To initiate the calibration procedure, short circuit the contacts inside the slot located on the printed circuit board (with a screwdriver). Automatic calibration proceeds as follows: • Actuator runs to the 0 stroke position (1) the green LED flashes . • Actuator then runs to the 100% stroke position (2) the green LED flashes. • Measured values are stored in the EPROM. • The actuator now moves to the position defined by control signal Y or Z (3), and the green LED now glows steady (normal operation) • Throughout this procedure, output U is inactive, meaning the values only represent actual positions when the green LED stops flashing and remains on continually. Table 1. LED Status. LED Display Function Action Green ON Normal Operation Automatic operation Flashing Stroke calibration In Progress Wait for calibration to be completed (LED stops flashing) Red ON Faulty stroke calibration Internal Error - Check mounting - Restart stroke calibration (by short- circuiting calibration slot) - Replace electronics Flashing Inner valve jammed Check the valve OFF • No power supply • Faulty electronics -Check mains -Replace electronics CAUTION: Before starting calibration, be sure that the manual adjuster is set to Automatic to register the actuator values. Document Number: 129-368 Installation Instructions September 25, 2018 Siemens Industry, Inc. Page 7 of 8 Stroke Calibration, continued Normally Closed Valve Actuator pressure cylinder moves: • Outward (0 to 1): Valve opens. • Inward (1 to 0): Valve closes. Normally Open Valve Actuator pressure cylinder moves: • Outward (0 to 1): Valve closes. • Inward (1 to 0): 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. NOTE: The valve body assembly determines the complete assembly action. Reference Technical Instructions Document Number Flowrite™ EA599 Series SKB/C/D 62U Series Electronic Valve Actuators 24 Vac Proportional Control Advanced Features 155-717 Manual Operation Figure 25. Manual Operation. Figure 26. Return to Automatic Operation. Figure 27. Valve Stem Travel Indication. Document No.129-368 Installation Instructions September 25, 2018 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 registered trademark of Siemens Industry, Inc. Product or company names mentioned herein may be the trademarks of their respective owners. © 2018 Siemens Industry, Inc. Siemens Industry, Inc. Building Technologies Division 1000 Deerfield Parkway Buffalo Grove, IL 60089 USA + 1 847-215-1000 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. 129-368 Printed in the USA Page 8 of 8 Dimensions Figure 28. SKB/C Weather Shield, 599-10065 Dimensions in Inches (Millimeters). Figure 29. SKB/C62UA Dimensions in Inches (Millimeters). CAUTION: Be careful when removing the knockout. Do not damage the circuit board. Use the top knockout position. Next >