Flowrite EA 599 Series SQX Electronic Valve Actuator 24 Vac, 3-Position Control Technical Instructions EA 599-7 Description The Flowrite EA 599 Series SQX electronic valve actuator requires a 24 Vac supply and receives a 3-position control signal to proportionally control a valve. This actuator is designed to work with Flowrite VF 599 valves with 3/4-inch (20 mm) stroke. Features Direct-coupled installation requires no special tools or adjustments Visual stroke indication Application Product Numbers Die-cast aluminum lower housing and yoke Manual override Self-lubricating bearing and gear train Electro-mechanical switches protect components from overload and stall conditions Maintenance-free These electronic actuators are designed to be used with Flowrite VF 599 Series valves with 3/4-inch (20 mm) stroke in liquid service and steam service applications. They are particularly recommended for installations requiring quick response and good rangeability. Product Number Run time Actuator Prefix Code SQX82.00U 120 seconds at 60 Hz 272 SQX82.03U 30 seconds at 60 Hz 273
Technical Instructions Flowrite EA 599 Series SQX Electronic Valve Actuator 24 Vac 3-position (Floating) Control Warning/Caution Notations WARNING CAUTION: Personal injury/loss of life may occur if you do not perform a procedure as specified. Equipment damage or loss of data may occur if you do not perform a procedure as specified. Specifications Power supply Control signal Operating voltage 24 Vac ±20% Frequency 50/60 Hz Power consumption 6.5 VA 3-position (floating) Function Nominal stroke 3/4-inch (20 mm) Run time @ 60 Hz @ 50 Hz Agency certification Ambient conditions SQX82.00U 120 seconds 150 seconds SQX82.03U 30 seconds 35 seconds Nominal force Ambient temperature Operation Transport and storage Ambient humidity 150 lb (700N) UL listed to UL873 C-UL certified to Canadian standard C22.2 No. 24-93 5 F to 131 F (-15 C to 55 C) -22 F to 149 F (-30 F to 65 F) 0 to 90% rh (non-condensing) Housing NEMA Rating NEMA 1 (interior only) See Accessories. Miscellaneous Media temperature to 285 F (140 C) Conduit opening 1/2-inch NPSM Dimensions See Figure 11. Weight 3.5 lb (1.6 kg) Accessories NOTE: Installation instructions are included with each accessory. Figure 1. Packing Heating Element. 599-00417 Packing heating element. The packing heating element allows the stem to move freely in valves which control fluids at temperatures below 32 F (0 C). It reduces ice crystal formation on the stem that may damage the packing. Operating Voltage 24 Vac Heating Output 20 W Page 2
Flowrite EA 599 Series SQX Electronic Valve Actuator Technical Instructions 24 Vac 3-position (Floating) Control 155-186P25 Accessories, continued ASC9.4U Double auxiliary switch. The double auxiliary switch has adjustable cams that can be set to give a signal at a desired position of the stroke. Figure 2. Double Auxiliary Switch. Switching capacity max 250 Vac 10 A resistive, 3 A inductive Lowest recommended current 10 ma 599-10071 Weather Shield See Service Kits for replacement UV resistant cable ties. Service Kits Figure 3. Weather Shield. Circuit board replacement 4 668 5641 8 Plastic wiring compartment cover 4 104 5575 8 Ultraviolet (UV) resistant cable ties (pkg. of 10) 538-996 SQX Details Figure 4. SQX Details. Page 3
Technical Instructions Flowrite EA 599 Series SQX Electronic Valve Actuator 24 Vac 3-position (Floating) Control Operation A 24 Vac control signal to Y1 causes the actuator s stem retainer to move toward the valve. A 24 Vac control signal to Y2 causes the actuator s stem retainer to move toward the actuator. See Figure 5. The stroke travel is proportional to the length of time the signal is applied. When power is turned off or in the event of a power failure, the actuator maintains its position. Figure 5. Valve Stem Travel. Mounting and Installation Figure 6. Acceptable Mounting Positions. The vertical position is the recommended position for mounting. Figure 6 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. This service envelope is the minimum space required to access and service the actuator. See Figure 13 for actuator dimensions and the recommended service envelope. Detailed installation instructions for field mounting are shipped with the actuator. Page 4
Flowrite EA 599 Series SQX Electronic Valve Actuator Technical Instructions 24 Vac 3-position (Floating) Control 155-186P25 Start-Up Manual operation Check the wiring for proper connections. NOTE: The valve body assembly determines the complete assembly action. Normally Closed Valve Stem retainer moves outward (0 to 1): Valve opens. Stem retainer moves inward (1 to 0): Valve closes. Normally Open Valve Stem retainer moves outward (0 to 1): Valve closes. Stem retainer moves inward (1 to 0): Valve opens. Three-Way Valve Stem retainer moves outward (0 to 1): Valve opens between port NC and C. Stem retainer moves inward (1 to 0): Valve opens between ports NO and C. Figure 7. The Manual Override Knob. Press and turn the manual override knob for manual operation. Clockwise moves the stem retainer toward 0; counterclockwise moves the stem retainer towards 1. NOTE: Keep the knob depressed as you turn. Each complete revolution (360 ) is equal to 1/4-inch (7 mm) stroke. If a signal is sent to the actuator while the manual override knob is depressed, the stem retainer will not move. Automatic Operation Wiring The actuator will return to automatic operation when the manual override knob is released. Do not use auto transformers. Use earth ground isolating step-down Class 2 power supplies. Determine supply transformer rating by summing total VA of all actuators used. The maximum rating for Class 2 step-down transformer is 100 VA. It is recommended that no more than 10 actuators are powered by one transformer. Page 5
Technical Instructions Flowrite EA 599 Series SQX Electronic Valve Actuator 24 Vac 3-position (Floating) Control Wiring Diagrams Figure 8. Figure 9. Wiring Designations. The diagram shows all possible connections. The application determines which connections are used. Connecting Terminals G System potential 24 Vac (+) Y1 Inward movement of the stem retainer (0 to 1) Y2 Outward movement of the stem retainer (1 to 0) Cm1 Limit switch Cm2 Limit switch c1 ASC9.4U dual auxiliary switch, Class 2 c2 ASC9.4U dual auxiliary switch, Class 2 Page 6
Flowrite EA 599 Series SQX Electronic Valve Actuator Technical Instructions 24 Vac 3-position (Floating) Control 155-186P25 Accessories Figure 10. ASC9.4U. Figure 11. Packing Heating Element 599-00417. Troubleshooting Check that the wires are connected correctly and attached securely. Check for adequate power supply. Dimensions Figure 12. 599-10071 Weather Shield dimensions in inches (millimeters). NOTE: The top knockout position should be used when installing the Weather Shield. Page 7
Technical Instructions Flowrite EA 599 Series SQX Electronic Valve Actuator 24 Vac 3-position (Floating) Control Dimensions, Continued Figure 13. Dimensions of SQX in inches (millimeters). Service envelope Minimum access space recommended 4 inch (100 mm) 8 inch (200 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 registered trademark of Product or company names mentioned herein may be the trademarks of their respective owners. 2005 Building Technologies Division 1000 Deerfield Parkway Buffalo Grove, IL 60089 + 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 Printed in the USA Page 8