User Guide

ManualsBrandsBarber Colman ManualsDampersSpring Return Valve Actuator for VB-7XXX Series

Application

TAC DuraDrive

Linear Actuators are designed to

mount directly onto two-way or three-way valves. They

provide linear travel to economically operate 1-1/4" to

2" VB-7xxx, 2-1/2” to 5" VB-8xxx, 2-1/2" to 4" VB-931x,

and discontinued 1-1/2” to 4” VB-9xxx valves in hot

water, chilled water, and steam applications up to

366°F (186°C) fluid temperature.

The linear spring return actuators provide either two

position, floating or proportional modulation control

(depending on model selection) of valves in HVAC

systems.

Features

• Two position models controlled by SPST controller

• Floating models controlled by SPDT floating

controllers

• Proportional models controlled by 2-10 Vdc, or 4-20

mAdc with the addition of a 500 ohm resistor.

Control function direct/reverse action is switch

selectable

• 220 lb force (979 newton) with 1/2” (13 mm) or

1" (25 mm) nominal linear stroke

• Automatically sets control signal input span to match

valve travel

• 24 Vac, 120 Vac, and 230 Vac models

• Rugged die-cast enclosures rated for NEMA 2, UL

Type 2/IP54

• Overload protection throughout stroke

• Compact size for application flexibility

• Manual override to allow positioning of valve and

preload

• Integral linkage for direct mount to valves

• Five year warranty

MAx1-720x Two Position Series

MFx1-7203 Floating Series

MSx1-7203 Proportional Series

TAC DuraDrive™ Linear Series

Spring Return Actuator

General Instructions

Mx51-720x

Mx61-720x

Summary of content (24 pages)

PAGE 1
MAx1-720x Two Position Series MFx1-7203 Floating Series MSx1-7203 Proportional Series TAC DuraDrive™ Linear Series Spring Return Actuator General Instructions Application TAC DuraDrive Linear Actuators are designed to mount directly onto two-way or three-way valves.
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Applicable Literature • TAC DuraDrive Linear Series Spring Return Actuator Submittal Sheet, F-27165 • Two-Way and Three-Way Globe Valve Assemblies with TAC DuraDrive Linear Series Spring Return Actuators Submittal Sheet, F-27167 • EN-205 Water System Guidelines, F-26080 • Vx-7xxx, Vx-9xxx Series Linked Globe Valves with TAC DuraDrive Linear Series Actuators Selection Guide, F-27252 • Vx-8xxx Valve Selection Guide, F-27199 • AM-731, AM-732, AM-733, AM-734, Kit General Instructions, F-27203 • VB-
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SPECIFICATIONS Actuator Inputs Control Signal: MAx1-720x—On-off spring return, SPST control contacts or Triacs (500mA rated). MFx1-7203—Floating point, SPDT control contacts or Triacs (500 mA rated) 24 Vac. MSx1-7203—Proportional, 2 to 10 Vdc or 4 to 20 mAdc with 500 Ω resistor. Power Input: MAx1-720x—24 Vac ± 20%, 22 to 30 Vdc, 120 Vac ± 10%, 230 Vac ± 10%, 50/60 Hz. All 24 Vac circuits are Class 2. All circuits 30 Vac and above are Class 1. MFx1-7203, MSx1-7203— 24 Vac ± 20%, Class 2, 22 to 30 Vdc.
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Table-1 Specifications. Part Number Control Action Voltage Approximate Stroke Timing in Output Force Actuator Power Input Seconds @ 70°F Rating (21°C) a Linear lb. (Newton) Running Holding Stroke Inches 50/60 Spring 50 Hz 60 Hz Powered Max. DC Hz Return Min. Stall Amps VA W VA W W Valve Size MA51-7203 24Vac ±20% 22-30 Vdc 9.8 7.5 9.7 7.5 .29 2.8 MA51-7200 120 Vac ±10% 11.7 8.8 10.0 8.4 N/A 3.6/5.0 230 Vac ±10% 15.5 9.5 10.6 8.5 N/A 4.6/3.3 MA61-7203 24 Vac ±20% 22-30 Vdc 9.
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Close-Off Pressure and Maximum Operating Pressure Differential For all valve assemblies, be sure to check that the anticipated maximum pressure drop across the valve in the closed position will not exceed the close-off pressure rating and that the pressure differential across the valve will not exceed the maximum operating pressure differential rating. For VB-7xxx and VB-9xxx valve applications, consult the Vx-7xxx & Vx-9xxx Selection Guide, F-27252.
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TYPICAL FLOATING CONTROL (wiring diagrams) Figure-2 through Figure-5 illustrate typical wiring diagrams for MFx1-7203 Series spring return floating actuators. See Table-1 for model selection. Caution: This product contains a half-wave rectifier power supply and must not be powered off transformers used to power other devices utilizing non-isolated full-wave rectifier power supplies. Refer to EN-206, Guidelines for Power Multiple Devices from a Common Transformer, F-26363 for detailed information.
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1 24 Vac Transformer or 22-30 Vdc Line Volts 1 Provide overload protection and disconnect as required. Common Black Common Red Hot (+DC) Blue Extend Yellow/Black Retract Hot MF51-7203 MF61-7203 2 3 2 Actuators may be wired in parallel. All actuator black wires are connected to the transformer common and all red wires are connected to the hot lead. Power consumption must be observed. 3 The Common connection from the actuator must be connected to the Hot connection of the controller.
PAGE 8
TYPICAL PROPORTIONAL CONTROL (wiring diagrams) Figure-6 illustrates typical wiring diagrams for MSx1-7203 Series proportional spring return actuators. See Table-1 for model selection. Caution: This product contains a half-wave rectifier power supply and must not be powered off transformers used to power other devices utilizing non-isolated full-wave rectifier power supplies. Refer to EN-206, Guidelines for Powering Multiple Devices from a Common Transformer, F-26363 for detailed information.
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Two Actuators Wired in Parallel 1 24 Vac Transformer or 22- 30 Vdc Gra Com Blk Red Yel/Blk Line Volts (-) (+) Control Signal 2 to 10 Vdc Com Hot (+DC) AI MSX1-7203 2 L R Blu 2 To reverse actuator control function (direct/reverse action), use the reversing switch, see Figure-9. AO Grn/Yel Gra 1 Provide overload protection and disconnect as required.
PAGE 10
Caution: • Avoid electrical noise interference. Do not install near large contactors, electrical machinery, or welding equipment. • Manual override to be used only when power is not applied to unit. • When operating manual override (observe position indicator, Figure-8), back off 5° (1/2 turn counter clockwise) from full extended mechanical stop to ensure proper release.
PAGE 11
Mounting • Mount the linear actuator directly on the valve in locations that clear the maximum dimensions of the actuator case (see Figures 19 and 20). • Ensure that the valve body is installed correctly. The arrow must point in the direction of flow. With three-way valves observe stem position (stem up) for proper flow characteristics. See Table-2. • The actuator must be mounted above the centerline of the valve body. This will minimize the risk of damage to the actuator in the event of condensation.
PAGE 12
Table-2 Valve Configuration Chart.
PAGE 13
Linear Actuator R Label (both sides) L 8 L Manual Override 5 7 Rack Lock Washer 3 6 Mounting Bracket Stem Extension 4 7 6 Jam Nut 1 2 7 Set Screw 9 Hex Mounting Nut* 4 Connecting Pin 7 Valve Stem* 2 3 6 *Not included with linear actuator. 6 Valve Body* Figure-11 Typical Assembly and Installation of Mx51 Series Actuator to 1-1/4" to 2" VB-7xxx Series Valve Bodies, Stem-Up Closed or Open, 2-Way and 3-Way Valves.
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Manual Override L Linear Actuator L R Label Rack Mounting Bracket Hex Mounting Nut* Lock Washer Connecting Pin Stem Extension Jam Nut Lock Washer Valve Stem* Valve Body* * Not included with linear actuator. Figure-12 Mx61-720x Series Actuator Exploded View. 14 © Copyright 2008 TAC All Rights Reserved.
PAGE 15
Linear Actuator Label (both sides) L 7 R L Manual Override 5 6 Rack Connecting Pin 6 3 Stem Extension 6 5 Mounting Bracket 5 Mounting Nut* Lock Washer 2 Jam Nut 1 2 3 6 5 Lock Washer 3 5 Valve Stem* 2 3 5 *Not included with linear actuator. 5 Valve Body* Figure-13 Typical Assembly and Installation. Installation: Mx61-720x Series Actuator to 2-1/2" to 4" VB-9xxx and 2-1/2" to 5" VB-8xxx Series Valve Bodies, Stem-Up Closed 2-Way and 3-Way A. Install the actuator onto the valve.
PAGE 16
Linear Actuator L 7 Label (both sides) R L Manual Override 5 6 Rack 3 Stem Extension 6 4 Mounting Bracket 2 Connecting Pin 6 Lock Washer 2 Jam Nut 1 3 6 3 4 Mounting Nut* 4 Lock Washer Valve Stem* 2 3 4 *Not included with linear actuator. 4 Valve Body* Figure-14 Typical Assembly and Installation. Installation: Mx61-720x Series Actuator to 2-1/2" to 4" VB-9xxx Series and 2-1/2" to 5" VB-8xxx Valve Bodies, 2-Way Stem-Up Open A. Install the actuator onto the valve.
PAGE 17
Valve Mounting The valve should be mounted in a weather-protected area, in a location that is within the ambient temperature limits of the actuator. The installation of the actuator assembly should provide clearance on all sides to allow for any maintenance that may be needed (see Figure-15 and Figure-17). Install the valve according to the instructions in the appropriate valve body General Instructions sheet (see Applicable Literature, page 2).
PAGE 18
0° 45° 45° 1 1 For steam applications the valve assembly must be mounted in piping at a 45° angle (either side). Figure-16 Typical Mounting Position for Steam Applications. 360° Rotation Range Figure-17 Actuator Positioned Anywhere Within 360 Degrees. 18 © Copyright 2008 TAC All Rights Reserved.
PAGE 19
MANUAL OVERRIDE OPERATION Rotation Indicator Triangle L 1 Insert the hex wrench fully into the manual override mechanism. R L LO CK 2 Unlock the manual override, using the hex wrench. To do this, turn, then release the hex wrench approximately 5° (1/2 turn) CW, to "jog" the mechanism and release the manual override preset. R L LOC 3 When finished, lock the manual override by turning the screwdriver CW (in the direction of the arrow).
PAGE 20
Wiring Requirements Control Leads See Table-3 for power wiring data. Refer to Figure-1 through Figure-7 for typical wiring. Table-3 Power Wiring. Actuator Voltage 24 Vac 22-30 Vdc Part Number Maximum Wire Run in ft.
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FIELD REPAIR Actuator: None. For replacement contact your TAC Representative and specify the desired model number from Table 1. Linkage parts: All are supplied with the actuator. Stem extension, jam nut, washer, and connecting pin may be purchased separately if lost. See ACCESSORIES, page 4. DIMENSIONAL DATA 10-9/16 (268) L R 2-33/64 (64) LO R CK 4 7 (178) (103) Dimensions shown are in inches (mm). 9-1/4 (235) Minimum clearance: 5" for actuator removal.
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Copyright 2008, TAC All brand names, trademarks and registered trademarks are the property of their respective owners. Information contained within this document is subject to change without notice. F-27120-5 TAC 1354 Clifford Avenue P.O. Box 2940 Loves Park, IL 61132-2940 www.tac.