Flowrite EA 599 Series SKB/C/D 62UA Series Electronic Valve Actuator 24 Vac Proportional Control Advanced Features
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1 Flowrite EA 599 Series SKB/C/D 62UA Series Electronic Valve Actuator 24 Vac Proportional Control Advanced Features Technical Instructions Document No EA April 3, 24 EA228R EA379R SKB/C SKD Description The Flowrite EA 599 Series SKB/C/D62UA Electronic Valve Actuator requires a 24 Vac supply and receives a to Vdc or a 4 to 2 ma control signal to proportionally control a valve. This actuator is designed to work with Flowrite VF 599 Series valves and standard valves with a 3/4-inch (2 mm) stroke. Features Direct-coupled installation requires no special tools or adjustments Application Visual and electronic stroke indication Die-cast aluminum housing Manual override Spring return to fail-safe position Automatic stroke calibration Direct or reverse acting Adjustable start and span limit control Selectable operation direction (direct-acting/reverse acting) Choice of linear or equal-percentage flow characteristic Maintenance-free These electronic actuators are designed to be used with Flowrite VF 599 Series valves with either 3/4-inch (2 mm) stroke (SKB/D) or a -/2 inch (4 mm) stroke (SKC) in liquid service and steam service applications; or other manufacturer's valves with appropriate Universal Valve Linkage Kit. Product Numbers Table. Product Numbers Actuator 3/4-inch (2 mm) Order Number SKB62UA SKD62UA
2 Technical Instructions Document Number April 3, 24 -/2 inch (4 mm) SKC62UA Warning/Caution Notations WARNING: CAUTION: Personal injury/loss of life may occur if a procedure is not performed as specified. Equipment damage, or loss of data may occur if the user does not follow a procedure as specified. Specifications Power Supply Operating voltage (SELV,PELV) 24 Vac ± 2% Frequency 5 or 6 Hz Power consumption SKB62UA 7 VA/ 2W SKC62UA 28 VA/ 2W SKD62UA 7 VA/ 2W Operating Type of control (proportional) to Vdc; 4 to 2 ma; or to ohm Running time Opening: Closing: SKB62UA 2 sec 5 sec SKC62UA 2 sec 2 sec SKD62UA 3 sec 5 sec Spring-return time Nominal stroke Position force Closing: SKB62UA SKC62UA SKD62UA SKB62UA SKC62UA SKD62UA SKB/C 62UA SKD62UA 5 sec 2 sec 5 sec 3/4-inch (2 mm) -/2-inch (4 mm) 3/4-inch (2 mm) 28N N Signal Inputs Terminal Voltage to Vdc Input impendence K ohm Current 4 to 2 ma Input impedance 24 ohm Signal resolution <% Hysteresis <% Page 2
3 Terminal Z Resistance to ohm Technical Instructions Document Number April 3, 24 Override control functions Z not connected No function (priority at Terminal ) Z connected directly to G Maximum stroke % Z connected directly to G Minimum stroke % Z connected to M via to ohm Linear or equal percentage Signal Inputs, continued Terminal U Voltage to 9.8 Vdc ± 2% Load impedance >5 ohm Current 4 to 9.6 ma ± 2% Load impedance <5 ohms Ambient Conditions Maximum admissible temperature of medium in the connected valve: Ambient temperature Media temperature 284 F (4 C) 5 F to 3 F (-5 C to 55 C) 4 F to 3 F (- C to 5 C) Agency Certification Operation To IEC Environmental conditions Class 3K5 Temperature 5 F to 22 F (-5 C to 5 C) Humidity 5% to 95% rh Transport To IEC Environmental conditions Class 3K5 Temperature 22 F to 49 F (-5 C to 65 C) Humidity <95% rh Storage To IEC Environmental conditions Class K3 Temperature 5 F to 22 F (-5 C to 5 C) Humidity 5% to 95% rh Meet CE requirements: EMC Directive UL listed to UL873 C-UL certified to Canadian standard C22.2 No /336/EEC C-tick N474 Miscellaneous Protection standard IP54 to EN Protection Class III to EN 6 73 Materials Actuator housing and bracket Die-cast aluminum Housing box and manual adjustor Plastic Conduit opening /2-inch NPSM Dimensions See Figures 25 and 26 Weight SKB62UA 8.9 lbs (8,6 kg) SKC62UA 22.5 lbs (, kg) SKD62UA 8.5 lbs (3,85 kg) Housing NEMA Rating NEMA (Interior only) See Accessories Page 3
4 Technical Instructions Document Number April 3, 24 Advanced Features Direction of Operation Direct acting / reverse acting Limit Control Range of lower limit Range of upper limit to Vdc; to Vdc 4 2 ma; 2 to 4 ma to ohm / to ohm % to 45% adjustable % to 55% adjustable Accessories Sequence Control Starting Point of Sequence (Start) Operating Range of Sequence (Span) EA7R Figure. Auxiliary Switch. to 5V adjustable 3 to 5V adjustable ASC.6 Auxiliary switch Sends a signal to indicate that the valve is in the % stroke position. The switching point is fixed at the % stroke position. Switching capacity Lowest recommended current 24 Vac 4A resistive, 2A inductive ma Packing heating element for SKD Packing heating element for SKB/C EA393R Figure 2. Packing Heating Element. 4 6 This heater allows the stem to move freely in valves that control fluids at temperatures below 32 F ( C). It reduces ice crystal formation on the stem which may damage the packing. Operating Voltage 24 Vac Heating Output FZA2. Remote setting unit. 2 W EA87R 2 8 % Figure 3. Remote Setting Unit. Potentiometer is used for manual control or remote setting of minimum positions of controlled devices. Suitable for flush panel mounting only. Control Input to ohms EA729R Figure 4. SKB/C Weather Shield The SKB/C 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 this weather shield and outdoor-rated conduit fittings in the vertical position. See Service Kits for replacement Ultraviolet resistant cable ties. Page 4
5 Accessories, continued Service Kits EA853R Figure 5. SKD Weather Shield. VF3R Set Screw Opening Stem Adapter Bonnet Adapter Bonnet Adapter Insert Figure 6. Valve Retrofit Kit. Technical Instructions Document Number April 3, The SKD actuator is UL listed to meet NEMA TPE 3R requirements (a degree of protection against rain, sleet, and damage from external ice formation) when installed with this weather shield and outdoor-rated conduit fittings in the vertical position. See Service Kits for replacement UV resistant cable ties. Universal Retrofit Kit Kit contains the parts needed to adapt a valve to the following Siemens 599 Series Flowrite actuators: SKB, SKC, SKD, SQX. Selected valves from the following manufacturers can also be accommodated: Honeywell, Johnson Controls and Siebe. See your local Siemens representative for details. Circuit board replacement Manual override kit Plastic wiring compartment cover Stem retainer kit Contains one stem nut (Figure 7, Item 6) and one stem retainer clip. 2-/2 and 3-inch valves , 5, and 6-inch valves Retainer clamp kit Ultraviolet (UV) resistant cable ties (pkg. of 8) WARNING: This product contains a spring under high compression. Do not attempt to disassemble the actuator. Valve Details Figure 7. SKB/C Valve Parts.. Manual Adjuster 2. Pressure Cylinder 3. Piston 4. Reservoir 5. Pressure Chamber 6. Pump 7. Return Spring 8. Bypass Valve 9. Coupling. Valve Stem. Inner Valve 2. Position Indicator ( to ) Page 5
6 Technical Instructions Document Number April 3, 24 Valve Details, continued ;EA389R ;Figure 8. SKD Valve Parts.. Pressure cylinder 2. Piston 3. Oscillating pump 4. Return spring 5. Bypass valve 6. Valve stem retainer 7. Manual override knob 8. Position indicator Standard Operation SKB SKC ACTUATOR PRESSURE CLINDER 3/4" 2mm /2" 4mm EA55R Figure 9. SKB\C Valve Stem Travel Indication. Direct Acting Vdc 4 2 ma STROKE 3/4 in. (2mm) EA439R EA387R Figure. SKD Valve Stem Travel Indication. The actuator accepts a to Vdc or a 4 to 2 ma control signal. The actuator mounted on a valve produces a stroke proportional to the input signal. When power is turned off or in the event of a power failure, the actuator spring returns the valve to its normal position. Page 6
7 Technical Instructions Document Number April 3, 24 Mounting and Installation The vertical position is the recommended position for mounting and the only position for NEMA Type 3R rating with the Weather Shield. Acceptable mounting positions are shown in Figure. Not allowed with the Weather Shield Not allowed in any circumstance EA33R2 Figure. Acceptable Mounting Positions. Allow four inches ( mm) around the sides and back of the actuator and eight inches (2 mm) above and to the front of the actuator. See dimensions in Figure 25and Figure 26. Detailed installation instructions for field mounting are shipped with the actuator. CAUTION: When removing the knockout do not damage the circuit board. Use the top knockout position, if possible. Start-up Spring Return Function Check the wiring for proper connections. NOTE: The valve body assembly determines the complete assembly action. All SKB/C/D62UA actuators are factory-fitted with a spring-return function. If the control signal or power supply fails, the actuator will return to the % stroke position (stem fully retracted). Page 7
8 Technical Instructions Document Number April 3, 24 Start-up continued Override Control The override control input (Z) has three modes of operation: EA64R No Function G G M U Z % Hmin Hmax Z-Contact not Wired Valve Follows Control Signal Actuator Fully Extended G G M U Z % % Vmax Z-Contact Connected Directly to G -Input has No Effect Override with... G G M U Z R % % 5 9 R [] Z-Contact Connected to M Via Resistor R Linear or Equal-Percentage Characteristic Starting Position at 5 / End Position at 9 -Input has No Effect Actuator Fully Retracted G G M U Z % % Vmax Z-Contact Connected Directly to G -Input has No Effect NOTE: The Z-modes have a "direct acting" factory setting. Calibration To determine the stroke positions % and % 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 CAUTION: Before starting calibration, be sure that the manual adjuster is set to Automatic for the actual values to register. There is a slot on the printed circuit boards for the actuators. To initiate the calibration procedure, the contacts inside this slot must be short-circuited (possibly with a screwdriver). See Figure 2. EA65R Automatic calibration proceeds as follows (See Figure 3): Figure 2. Actuator runs to the % stroke position (), the green LED flashes. Page 8 Actuator then runs to the % 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 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 continuously. EA66R % % Figure 3. Automatic Calibration. 2 3 y
9 Start-up continued Table 2. LED Status. Technical Instructions Document Number April 3, 24 LED Display Function Action ON Normal Operation Automatic operation Green calibration In Wait for calibration to be Flashing Progress completed (LED stops flashing) Faulty stroke calibration - Check mounting ON - Restart stroke calibration (by short-circuiting calibration slot) Red Internal Error - Replace electronics Flashing Valve plug jammed Check the valve OFF No power supply - Check mains Faulty electronics - Replace electronics Advanced Features Connection Terminals Calib. Calibration G G M U Z AC 24V G 5/6Hz... V G mA Chm Status Green OK Calib. Rotary Switches LO and UP Calib. Status Red Error Valve Jam LED Status Indication EA77R Figure 4. DIP Switches. DIP Switches (From Left to Right) Select Direction of Operation 2 Sequence Control or Limit Control 3 Selection of Control Signal 4 Selection of Flow Characteristic ON Reverse-acting Sequence control 4 to 2 ma Modified* OFF (Factory Settings) Direct-acting limit control to 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. Page 9
10 Technical Instructions Document Number April 3, 24 Start-Up, continued Selecting the Direction of Operation With normally-closed valves, "direct-acting" means that with a Vdc signal input, the valve is closed. With Normally-open valves, "direct-acting" means that with a Vdc signal input, the valve is open. EA7R Direct-Acting % % (V) Reverse-Acting (V) % % % % Reverse-Acting Direct Input: to Vdc Input to Vdc Vdc Vdc 4 to 2 ma 2 to 4 ma 4 ma 2 ma to ohm to ohm ohm ohm Figure 5. Direction of Operation. Sequence Control or Limit Control Check the wiring for proper connections. NOTE: The valve body assembly determines the complete assembly action. Table 3. Table 4. Setting the Limit Control The rotary switches LO and UP can be used to apply an upper and lower limit to the stroke in increments of 3% up to a maximum of 45%. Setting the Sequence Control The rotary switches LO and UP can be used to determine the starting point (Start) or the operating range of a sequence (Span). % to 55% UP % 3 to 5V UP EA7R LO to 45% y EA72R LO to 5V y Page Position of LO Lower Limit Position of UP Upper Limit Position of LO Starting Point for Sequence Control Position of UP Operating Range of Sequence Control % % V V 3% 97% V V* 2 6% 2 94% 2 2V 2 V* 3 9% 3 9% 3 3V 3 3V* 4 2% 4 88% 4 4V 4 4V 5 5% 5 85% 5 5V 5 5V 6 8% 6 82% 6 6V 6 6V 7 2% 7 79% 7 7V 7 7V 8 24% 8 76% 8 8V 8 8V 9 27% 9 73% 9 9V 9 9V A 3% A 7% A V A V B 33% B 67% B V B V C 36% C 64% C 2V C 2V D 39% D 6% D 3V D 3V E 42% E 58% E 4V E 4V F 45% F 55% F 5V F 5V *The smallest adjustment is 3 Vdc; Control with to 3 Vdc is possible only via.
11 Technical Instructions Document Number April 3, 24 Start-up, continued Normally Closed Valve Normally Open Valve Three Way Valve Manual operation When actuator pressure cylinder: Moves outward ( to ): Valve opens. Moves inward ( to ): Valve closes. When actuator pressure cylinder: Moves outward ( to ): Valve closes. Moves inward ( to ): Valve opens. When actuator pressure cylinder: Moves outward ( to ): Valve opens between port NC and C. Moves inward ( to ): Valve opens between ports NO and C. The measuring voltage at terminal U provides valve stem position feedback to an indicating instrument or building automation system. 8 EA6R x 36 = 2mm EA386R MAN MANUAL INDICATOR AUTO Figure 7. SKD Manual Operation. EA62R Figure 6. SKB/C Manual Operation. Turn the manual setting knob clockwise for manual operation. As you begin to turn, a red indicator becomes visible. Each complete revolution (36 ) is equal to 3/32-inch (2.5 mm) stroke. NOTE: If a signal is sent to the actuator while it is in manual operation, the actuator will move, but the control will not be accurate. The valve cannot be commanded to its % position while in manual operation. Page
12 Technical Instructions Document Number April 3, 24 Start-up continued Automatic Operation SKB/C When returning to automatic control, you must turn the crank arm of the manual setting knob counterclockwise until the red numbers disappear. It is essential that the window is clear and the crank arm is snapped into position. See Figure 8. x 36 = 2mm 2 Figure 8. SKB/C Automatic Operation. SKD For automatic operation, the manual override knob must be in the fully closed position. Turn the manual override knob counterclockwise until the red indicator disappears. EA73R EA6R EA63R Figure 9. Fully Retracted Coupling Fully Extended Coupling = % = % CAUTION: The manual adjuster must be rotated counterclockwise to the end stop until the red indicator marked MAN is no longer visible. Page 2
13 AC 24 V Wiring Technical Instructions Document Number April 3, 24 Do not use auto-transformers. Use earth ground isolating step-down Class II power supplies. Determine supply transformer rating by summing total VA of all actuators used. Determine the rating for Class 2 step-down transformer is VA and consider the following requirements: SKB62A = 7 VA SKC62UA = 28 VA SKD62UA = 7 VA; A maximum of four actuators can be powered by one transformer (8% of transformer VA). Operating more than four SK series actuators requires additional transformers or separate VA power supplies. 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. Wiring Diagrams B F G (SP) B M 2 3 G B M N G M G M U Z EA74R G G (SN) B Sensor F Temperature Limiter N Controller Actuator Figure 2. Terminal Connections. 24 Vac G System potential (SP) G System neutral (SN) Control input signal to (3) Vdc or 4 to 2 ma M Measuring neutral U Position indication to Vdc or 4 to 2 ma (see Table ) Z Override input. 3 EA76R c 4 5 Figure 2. Auxiliary Switches. Table. Actuator Output Signal U. Actuator input signal Receiving Impedance low (<5 ohm) high (>K ohm) to Vdc to 2 ma to Vdc 4 to 2 ma 4 to 2 ma 2 to Vdc Page 3
14 Technical Instructions Document Number April 3, 24 Wiring Diagrams, continued EA85R 3 4 C 5 G (SP) 24V~ 2W GO (SN) 2 EA84R EA83R2 Z M Figure 22. Auxiliary Switch ASC.6. Figure 23. Packing Heating Element Figure 24. Remote Setting Unit FZA2.. Dimensions 9" (228) 4" (335) 6" (52) 6" (52) 3-5/6" (99) 5" (27) 6-/2" (42) 2-3/6" (55) EA8R Figure 25. Dimensions of SKB\C Weather Shield in Inches (Millimeters). Page 4
15 Technical Instructions Document Number April 3, 24 Dimensions, continued -/4 (285) 8-3/6 (224) 4-3/6 (22) 4-3/6 (22) 2-9/6 (65) 2-7/8 (327) 9-3/8 (232) 4-/2 (4) 3/4 (9) -5/6 (49) EA854R 5 (26) Figure 26. Dimensions of SKD Weather Shield in Inches (Millimeters). 5 (27) 3 /2 (89) 5 /2 (4) 3 /2 (89) 5 3 /32 (37) Ø 7 (78) Ø 9 /4 (235) EA77R KNOCKOUTS FOR STANDARD /2" CONDUIT CONNECTOR 4 3 /4 (375) 24mm Ø or 4mm MINIMUM ACCESS SPACE REQUIRED SKB/SKC 4 () 8 (2) 3 (76) Ø /4 (44) Figure 27. SKB/C Weather Shield, in Inches (Millimeters). Page 5
16 Technical Instructions Document Number April 3, 24 Dimensions, continued 4-3/4 (2) 2-/2 (64) 4-/8 (5) KNOCKOUT FOR STANDARD /2" CONDUIT CONNECTOR Ø5 (27) 5-5/8 (43) -3/6 (3) 4-7/8 (23) EA385R 2-5/8 (66) Ø-3/4 (44) Ø2-9/6 (65) Figure 28. Dimensions of SKD Actuator in Inches (Millimeters). 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 Other product or company names mentioned herein may be the trademarks of their respective owners. 24 Deerfield Parkway Buffalo Grove, IL U.S.A. our feedback is important to us. If you have comments about this document, please send them to technical.editor@siemens.com Document No Printed in the U.S.A. Page 6
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