VE VXG Series Electronic Three-way Valves

Transcription

1 VE VXG Series Electronic Three-way s Technical Instructions Document No P25 VE VXG-1 Description The VE VXG electronic three-way valve controls the flow of water or glycol solutions. The electronic actuator requires a 24 Vac supply and receives a 0 to 10 Vdc control signal to control the 7/32-inch (5.5 mm) nominal stroke valve. Features Maintenance free actuator with reversible motor Application Selector plug on actuator permits selection of linear or equal percentage flow characteristics Reduced seat diameter produces reduced Cv (Kvs) in 1/2-inch valve bodies 0 to 10 Vdc or 0 to 1000 ohms signal input Position output signal 0 to 10 Vdc Available with union or sweat end connections (1/2 and 3/4-inch) Double O-ring packing with Teflon wiper Manual override knob with indication of stroke allows for repositioning of the valve in power-off conditions (SQS65U only) Spring return closes flow port in power-off condition (SQS65.5U only) The VE VXG valve can be used as a control and shutoff valve in small to medium HVAC installations for hot water and chilled water applications. Use only as a mixing valve. Use in closed circuits only. NOTE: This valve is not designed for steam applications. See body specifications for details. Product Numbers and Ordering Information Order the valve and actuator separately. See Table 1 for product information.

2 Technical Instructions VE VXG Electronic Three-way s Nominal Size Inches (mm) Cv (Kvs) Body only with External Threads Product Number Union Table 1. Product Information. Sweat Actuator Product Number Non- Spring Return Spring Return 0.5 (15) 0.47 (0.40) VXG VXG U VXG S SQS65U SQS65.5U (15) 0.74 (0.63) VXG VXG U VXG S SQS65U SQS65.5U (15) 1.17 (1.0) VXG VXG U VXG S SQS65U SQS65.5U (15) 1.87 (1.6) VXG VXG U VXG S SQS65U SQS65.5U (15) 2.92 (2.5) VXG VXG U VXG S SQS65U SQS65.5U (15) 4.68 (4) VXG VXG U VXG S SQS65U SQS65.5U (20) 7.37 (6.3) VXG VXG U VXG S SQS65U SQS65.5U (25) 11.7 (10) VXG VXG U SQS65U SQS65.5U (32) 18.7 (16) VXG VXG U SQS65U SQS65.5U (40) 29 (25) VXG VXG U SQS65U SQS65.5U 100 Max P * = Maximum recommended differential pressure for modulating service. Specifications Actuator Power Requirements Functional Operation Control Characteristics Spring and Non-Spring Return Range- Ability Operating Voltage 60 Hz 24 Vac, +20%, -15% 50 Hz 24 Vac, ±20% Power Consumption SQS65U 4.5 VA SQS65.5U 7 VA Running Time At 60 Hz 30 seconds At 50 Hz 35 seconds Close-Off psig (kpa) 43.5 (300) 29 (200) 14.5 (100) Spring Return (SQS65.5U only) 8 seconds Nominal Stroke 7/32-inch (5.5 mm) Nominal Force 67 lb (300 N) Control Signal (Y) Voltage 0 to 10 Vdc Current 0.1 ma Input Impedance 100K ohms Control Signal (R) Resistance 0 to 1000 ohms Position Output (U) Voltage 0 to 10 Vdc Current 0.5 ma maximum Flow Characteristic Linear or equal percentage Max P * psig (kpa) 43.5 (300) 29 (200) 14.5 (100) Page 2

3 VE VXG Electronic Three-way s Specifications, Continued Technical Instructions Environmental Ambient Temperature Operating 5 to 122 F (-15 to 50 C) Conditions Transport and storage -13 to 149 F (-25 to 65 C) Agency Approvals UL UL873 C-UL Certified to Canadian Standards CSA C22.2 No Physical Characteristics Weight SQS65U SQS65.5U 1.1 lb (0.5 kg) 1.3 lb (0.6 kg) Dimensions See Figure 8 Composition Body Style Globe Body Bronze Connections Union with brass nut, composite gasket, forged bronze tail piece with internal NPT or Sweat end for use in 7/8-inch O.D. copper tubing Trim Upper Seat 1/2-inch and 3/4-inch Stainless Steel 1-inch to 1-1/2 inch Bronze Lower Seat Bronze Packing Double O-ring Body Rating ANSI 125 (PN 16) Operating Conditions Physical Characteristics Line Size/Capacity See Tables 1 and 2 Medium Water, glycol to 50% Rangeability See Table 1 Flow Characteristics II to I and III to I Field selectable. See Start-up section. Leakage Rate 0.02% of Cv Medium Temperature 36 to 248 F (2 to 120 C) Maximum Inlet Pressure 232 psig (1600 kpa) Maximum Pressure Differential for Modulating Service See Table 1 Close-Off Pressure See Table 1 Weight See Figure 8 Dimensions See Figure 8 Page 3

4 Technical Instructions VE VXG Electronic Three-way s Table 2. Maximum Water Capacity US Gallons per Minute. Pressure Differential (psi) 1 Kvs Cv 1/2 (15) 0.47 (0.40) /2 (15) 0.74 (0.63) /2 (15) 1.17 (1.0) /2 (15) 1.87 (1.6) /2 (15) 2.92 (2.5) /2 (15) 4.68 (4.0) /4 (20) 7.37 (6.3) (25) 11.7 (10) /4 (32) 18.7 (16) /2 (40) 29 (25) Warning/Caution Notations WARNING: CAUTION: Personal injury/loss of life may occur if you do perform a procedure as specified. Equipment damage may occur if you do not perform a procedure as specified. Operation The arrow on the valve indicates the direction of flow. As a mixing valve, the direction of flow is always from II (A) to I (AB). See Figure 1. Figure 1. VXG Direction of Flow. With the valve stem down, the valve opens from II (A) to I (AB) and closes III (B) to I (AB). With the valve stem up, the valve closes from II (A) to I (AB) and opens III (B) to I (AB). An electronic motor actuator positions the valve. A continuous 0 to 10 Vdc signal controls the actuator. The valve provides a linear flow characteristic. A selector plug on the SQS actuator allows selection of linear or equal percentage flow characteristic. The valve stroke is proportional to the control signal with linear flow selected. See Figure 6. Page 4

5 VE VXG Electronic Three-way s Operation, Continued Technical Instructions A zero voltage control signal returns the valve to its 0 position. In the event of a power failure, the SQS65U holds its last position, and the SQS65.5U returns the valve to its fail-safe position. The position output 0 to 10 Vdc signal U produces position feedback to the field panel. An additive control input at R for 0 to 1000 ohms allows control by either a low temperature detector or a remote setting unit. Installation The valve assembly can be installed in the supply or return line. NOTE: For hot water installations, it is recommended to place the valve in the return line because the temperature is lower. Match the direction of flow with the symbol cast on the valve body. See Figure 1. Allow 8 inches (200 mm) of clearance for installation and service. Mount the assembly in any position except with the actuator beneath the valve. See Figure 2 for allowable mounting positions. CAUTION: Dirt in the piping system can cause valve problems. Before starting-up and troubleshooting the valve, make certain that the piping system is free of dirt and foreign particles. Figure 2. Mounting Positions. Before installing the actuator, use a protective plastic cap (Figure 1) to manually position the valve. The plastic cap opens up to 80% flow from II (A) to I (AB) and closes down to 20% flow from III (B) to I (AB). Port III (B) can not be completely closed using the plastic cap. NOTE: Do not discard the plastic cap. It may be needed during troubleshooting or for emergency valve operation. Page 5

6 Technical Instructions Wiring WARNING: VE VXG Electronic Three-way s On valve actuator wiring code, G is 24 Vac HOT, not ground. Figure 3. Terminal Connections in Actuator. G, G0 24 Vac operating voltage G = System potential G0 = System neutral Y 0 to 10 Vdc control signal R M U Input for 0 to 1000 ohms remote setting unit or low temperature detection unit Measuring neutral Output for 0 to 10 Vdc position indication Figures 4 and 5 show wiring diagrams for the APOGEE field panels. All units that connect to terminals Y and U, together with the SQS65U, must connect to the same G0. When wiring the position output to AI terminations, connect terminal U to SIG and terminal G0 to COM. The factory-fitted link across terminals R and M can be removed only if a unit connects between these terminals. Figure 4. Field Panel Series Wiring. Figure 5. Field Panel Parallel Wiring. Page 6

7 VE VXG Electronic Three-way s Technical Instructions Start-Up Remove the actuator cover and verify the selector plug is set for the desired flow characteristic. See Figure 6. Position A-C C-B Flow Characteristics Equal Percentage (Factory Setting) Linear Equal Percentage Linear O O A C B A C B V = Volumetric flow 1 to 100% YU = 0 to 10 Vdc control signal YR = 0 to 1000 ohm resistance signal Figure 6. Selector Plug Setting for Flow Characteristic. Troubleshooting Check wiring for appropriate connections (Figures 4 and 5). Check selector plug for proper flow characteristic. Check valve operation. Thread plastic valve cap (Figure 1) onto top of valve. Turn it to adjust valve position. Stem Packing Figure 7. VXG Construction. Service If either valve or actuator is inoperative, replace that unit. WARNING: To avoid personal injury, do not attempt to repair the valve. Page 7

8 Technical Instructions VE VXG Electronic Three-way s Dimensions Nominal Size 1/2 (15) 3/4 20) 1 (25) A AA B BB 3-15/16 (100) 3-15/16 (100) 4-5/32 (105) 1-1/4 (32) 4-5/32 (105) 1-1/2 (40) 5-1/8 (130) 5-13/16 (148) 5-29/32 (150) 6-5/16 (160) 6-11/16 (170) 7-13/16 (198) 1-31/32 (50) 1-31/32 (50) 2-1/16 (52.5) 2-1/16 (52.5) 2-9/16 (65) 2-29/32 (74) 2-15/16 (75) 3-5/32 (80) 3-3/8 (85) 3-29/32 (99) C Metric Thread G 1" 11/32 (8.5) G 1-1/4" 3/8 (9) G 1-1/2" 3/8 (9) G 2" 7/16 (11) G2-1/2" 1/4 D H J M N 7/16 (11) 2-1/2 (63) 3-1/16 (78) 3-3/16 (81) 3-7/16 (87.5) 3-9/16 (90.5) 2-3/32 (53) 2-11/16 (68) 2-25/32 (71) 3-1/16 (77.5) 3-3/16 (80.5) 1 (25) 1-1/4 (32) 1-1/2 (38) 1-7/8 (47) 2-3/32 (53) 1-5/8 (41) 1-31/32 (50) 2-5/32 (55) 2-3/4 (70) 2-31/32 (75) Figure 8. Dimensions for SQS65U Actuator and VXG 44. P NPT for Union S Solder Cup for Sweat Weight of lbs. (kg) 1/2" 7/8" 1.1 (0.50) 3/4" 7/8" 1.9 (0.85) 1" (1.20) 1-1/4" (1.60) 1-1/2" 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. APOGEE is a registered trademark of Other product or company names mentioned herein may be the trademarks of their respective owners Building Technologies Division 1000 Deerfield Parkway Buffalo Grove, IL 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 P25 Printed in the USA Page 8