Technical Instructions Document No. 155-181P25 September 25, 2018 Flowrite™ 599 Series SKD Electronic Valve Actuator 24 Vac 3-Position (Floating) Control Description The Flowrite 599 Series SKD electronic valve actuator requires a 24 Vac supply to provide three-position control. This actuator is designed to work with Flowrite 599 Series with a 3/4-inch (20 mm) stroke.
Technical Instructions Document No. 155-181P25 September 25, 2018 SKD Electronic Valve Actuator 3-Position (Floating) Control Warning/Caution Notations Specifications Power supply Equipment Rating Function WARNING: Personal injury or loss of life may occur if you do not perform a procedure as specified. CAUTION: Equipment damage or loss of data may occur if you do not perform a procedure as specified. Operating voltage Frequency Power consumption SKD82.
SKD Electronic Valve Actuator 3-Position (Floating) Control Accessories, Continued NOTE: Technical Instructions Document No. 155-181P25 September 25, 2018 Installation instructions are included with each accessory. ASC9.3DU Double auxiliary switch. The switch has adjustable cams that can be set to give a signal at a desired position of the stroke. Includes NEC Class I compliant wiring compartment cover. Switching capacity Figure 2. Double Auxiliary Switch. max 250 Vac 6 A resistive, 2.
Technical Instructions Document No. 155-181P25 September 25, 2018 SKD Electronic Valve Actuator 3-Position (Floating) Control WARNING: This product contains a spring under high compression. Do not attempt to disassemble the actuator. Legend SKD Details 1. Pressure cylinder 2. Piston 3. Oscillating pump 4. Return spring 5. Bypass valve 6. Valve stem retainer 7. Manual override knob 8. Position indicator Figure 5. SKD Details.
SKD Electronic Valve Actuator 3-Position (Floating) Control Technical Instructions Document No. 155-181P25 September 25, 2018 Operation, Continued Figure 8. Valve Stem Travel Indication. Mounting and Installation Figure 9. Mounting Positions. Start-Up • The vertical position is the recommended position for mounting. Figure 9 shows the acceptable mounting positions. • Allow 4 inches (100 mm) around the sides and back of the actuator and 8 inches (200 mm) above and to the front of the actuator.
Technical Instructions Document No. 155-181P25 September 25, 2018 Start-Up, Continued SKD Electronic Valve Actuator 3-Position (Floating) Control Normally Open Valve Actuator pressure cylinder moves outward (0 to 1): Valve closes. Actuator pressure cylinder moves inward (1 to 0): Valve opens. Three-Way Valve Actuator pressure cylinder moves outward (0 to 1): Valve opens between ports NC and C. Actuator pressure cylinder moves inward (1 to 0): Valve opens between ports NO and C.
SKD Electronic Valve Actuator 3-Position (Floating) Control Technical Instructions Document No. 155-181P25 September 25, 2018 Wiring Diagrams Non-spring Return SKD82.50U Figure 11. Non-spring Return Wiring Diagrams. The diagram shows all possible connections. The application determines which connections are used. Connecting Terminals G System Potential 24 Vac (+) Y1 Outward movement of the valve stem retainer (0 to 1) Y2 Inward movement of the valve stem retainer (1 to 0) Cm1 C1 ASC9.
Technical Instructions Document No. 155-181P25 September 25, 2018 SKD Electronic Valve Actuator 3-Position (Floating) Control Wiring Diagrams, Continued Spring Return SKD82.51U Figure 12. Spring Return Wiring Diagrams. The diagram shows all possible connections. The application determines which connections are used.
SKD Electronic Valve Actuator 3-Position (Floating) Control Troubleshooting Dimensions Technical Instructions Document No. 155-181P25 September 25, 2018 • Check that the wires are connected correctly and attached securely. • Check for adequate power supply. • Check that the actuator is set for automatic operation. See the Start-up section. NOTE: The top knockout position should be used when installing the Weather Shield. See Figure 15.
Technical Instructions Document No. 155-181P25 September 25, 2018 SKD Electronic Valve Actuator 3-Position (Floating) Control Dimensions, Continued NOTE: The top knockout position should be used when installing the Weather Shield. Figure 15. Dimensions of SKD82.50U and SKD82.51U in Inches (Millimeters). Service Envelope Minimum access space recommended 4 inches (100 mm) 8 inches (200 mm) Information in this publication is based on current specifications.
