T.A.C. MA51-7203, MA51-7200, MA51-7201, MA61-7203, MA61-7200 User Guide

...

Page 1

TAC

1354 Clifford Avenue P. O. Box 2940 Loves Park, IL 61132-2940 www.tac.com

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.

MAx1-720x Two Position Series

MFx1-7203 Floating Series

MSx1-7203 Proportional Series

TAC DuraDrive™ Linear Series

Spring Return Actuator

General Instructions

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

Mx51-720x

• Integral linkage for direct mount to valves

• Five year warranty

Mx61-720x

Page 2

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-7213 Series 1/2" to 2" Screwed NPT, Stem Up Open, Two-Way Valves, General Instructions, F-26075

• VB-7214 Series 1/2" to 2" Union Sweat, Solder Joint Stem Up Open, Two-Way Valves, General Instructions, F-25675

• VB-7215 Series 15 mm to 50 mm Screwed Rp, Stem Up Open, Two-Way Valves, General Instructions, F-26077

• VB-7223 Series 1/2" to 2" Screwed NPT, Stem Up Closed, Two-Way Valves, General Instructions, F-26073

• VB-7224 Series 1/2" to 2" Union Sweat, Solder Joint Stem Up Closed, Two-Way Valves, General Instructions, F-24387

• VB-7225 Series 15 mm to 50 mm Screwed Rp, Stem Up Closed, Two-Way Valves, General Instructions, F-26079

• VB-7253 Series 1/2" to 2" Screwed NPT, Stainless Steel Trim with Teflon Disc, Stem Up Open, Two-Way Valves, General Instructions, F-24388

• VB-7263 Series 1/2" to 2" Screwed NPT, Stainless Steel Trim with Teflon Disc, Stem Up Closed, Two-Way Valves, General Instructions, F-24389

• VB-7273 Series 1/2" to 2" Screwed NPT, Stainless Steel Trim, Stem Up Open, Two-Way Valves, General Instructions, F-24390

• VB-7283 Series 1/2" to 2" Screwed NPT, Stainless Steel Trim, Stem Up Closed, Two-Way Valves, General Instructions, F-24391

• VB-7313 Series 1/2" to 2" S crewed NPT, Three-Way Mixing Valves, General Instructions, F-26074

• VB-7314 Series 1/2" to 2" Union Sweat, Solder Joint, Three-Way Mixing Valves, General Instructions, F-24394

• VB-7315 Series 15 mm to 50 mm Screwed Rp, Three-Way Mixing Valves, General Instructions, F-26078

• VB-7323 Series 1/2” to 2” Screwed NPT Three-way Diverting Valves, General Instruction, F-26076

• VB-8213 Series 2-1/2” to 6" Flanged, Stem Up Open, Two-Way Valves, General Instructions, F-27193

• VB-8223 Series 2-1/2” to 6" Flanged, Stem Up Closed Two-Way Valves, General Instructions, F-27194

• VB-8303 Series 2-1/2” to 6" Flanged, Three-Way Diverting/Mixing Valves, General Instructions, F-27197

• VB-9213 Series, 2-1/2” and 3” Screwed NPT, 2-1/2” to 6” 125 Lb. Flanged, Stem Down to Close Two-Way Valves, General Instructions, F-24382

• VB-9215 Series, 65 mm and 80 mm Screwed R

• VB-9223 Series, 2-1/2” and 3” Screwed NPT, 2-1/2” to 6” 125 Lb. Flanged, Stem Up to Close Two-Way Valves, General Instructions, F-24386

• VB-9225 Series, 65 mm and 80 mm Screwed R

• VB-9313 Series, 2-1/2” and 3” Screwed NPT, 2-1/2” to 6” 125 Lb. Flanged, Three-Way Mixing Valves, General Instructions, F-24393

• VB-9315 Series, 65 mm and 80 mm Screwed R

, Stem Down to Close Two-Way Valves, General Instructions, F-25672

, Stem Up to Close Two-Way Valves, General Instructions, F-25673

, Three-Way Mixing Valves, General Instructions, F-25674

Page 3

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. Connections: 3 ft (91 cm) appliance cables, 1/2 inch (13 mm) conduit connectors. For M20

Metric conduit, use AM-756 adaptor.

Actuator Outputs

Electrical:

Position Feedback Voltage (proportional only):

MSx1-7203—2 to 10 Vdc (max. 0.5 mA) output signal for position feedback or to

operate up to four additional slave actuators.

Mechanical: Motor Type: Brushless DC. Linear Stroke (Nominal): Mx51-720x—1/2" (13 mm). Mx61-720x—1” (25 mm).

Approx. Stroke Timing, 100 seconds for 1/2" stroke. 190 seconds for 1” stroke. Manual Override, Allows positioning of valve and preload using manual crank. Right/Left Switch, Permits reverse acting/direct acting linear motion (MSx1 only).

Environment:

Ambient Temperature Limits, Shipping & Storage, -40 to 160 °F (-40 to 71 °C). Operating, 0 to 140 °F (-18 to 60 °C). Temperature Restrictions,

Actuator

Mx51-720x

Mx61-720x 140 °F (60 °C)@ 300 °F (149 °C) 2-1/2" to 4" VB-931x

Mx61-720x 140 °F (60 °C)@ 281 °F (138 °C)

Discontinued

Max. Allowable Ambient

@ Max. Fluid Temperatures

Valve Body

140 °F (60 °C)@ 281 °F (138 °C) VB-721x, 722x

120 °F (49 °C)@ 300 °F (149 °C) VB-73xx

100 °F (38 °C)@ 340 °F (171 °C) VB-725x, 726x

90 °F (32 °C)@ 366 °F (186 °C) VB-727x, 728x

2-1/2” to 5” VB-8xx3,

2-1/2" to 4" VB-92xx

Humidity: 15 to 95% RH, non-condensing. Location:

NEMA1. NEMA 2, UL Type 2 (IEC IP54) with customer supplied watertight conduit connectors.

Agency Listings

UL 873: Underwriters Laboratories (File #E9429 Category Temperature-Indicating and

Regulating Equipment). CUL: UL Listed for use in Canada by Underwriters Laboratories. Canadian Standards C22.2 No. 24-93.

European Community: EMC Directive (89/336/EEC). Low Voltage Directive (72/23/EEC) Australia: This product meets requirements to bear the C-Tick Mark according to the terms

specified by the Communications Authority under the Radiocommunications Act 1992.

The specifications conform to acceptable industry standards. For applications at conditions beyond these specifications, consult your local TAC representative office. TAC shall not be liable for damages resulting from misapplication or misuse of its products.

Page 4

Table-1 Specifications.

Approximate Stroke Timing in Seconds @ 70°F

(21°C)

Powered

Spring Return

Part

Number

Control

Action

Voltage

Actuator Power Input

Running Holding

50 Hz 60 Hz

VA W VA W W

Amps

50/60

Linear Stroke Inches

24Vac

MA51-7203

±20%

9.8 7.5 9.7 7.5 .29 2.8

22-30 Vdc

MA51-7200

MA51-7201

MA61-7203

Position

120 Vac

±10%

230 Vac

±10%

24 Vac

±20%

11.7 8.8 10.0 8.4 N/A 3.6/5.0

15.5 9.5 10.6 8.5 N/A 4.6/3.3

9.8 7.5 9.7 7.5 .29 2.8

5/8 <100 <35

22-30 Vdc

MA61-7200

MA61-7201

120 Vac

±10%

230 Vac

±10%

11.7 8.8 10.0 8.4 N/A 3.6/5.0

15.5 9.5 10.6 8.5 N/A 4.6/3.3

1-1/16 <190 <40

24 Vac

MF51-7203

Floating

MF61-7203

±20%

22-30 Vdc

24 Vac

±20%

9.8 7.7 9.7 7.7 .30 3.3 5/8 <100 <35 1-1/4" to 2"

9.8 7.7 9.7 7.7 .30 3.3 1-1/16 <190 <40

22-30 Vdc

24 Vac

MS51-7203

Proportional

MS61-7203

±20%

22-30 Vdc

24 Vac

±20%

9.8 7.4 9.7 7.4 .28 2.9 5/8 <100 <35 1-1/4" to 2"

9.8 7.4 9.7 7.4 .28 2.9 1-1/16 <190 <40

22-30 Vdc

Timing was measured with no load applied to the actuator.

Current VB-7xxx series valves and discontinued 1-1/4” VB-9xxx series valves.

Current VB-931x Series valves (2-1/2" to 4"), current VB-8xx3 (2-1/2” to 5”) Series valves, and discontinued VB-9xxx (1-1/2" to 4") Series valves.

Output Force

Rating

lb. (Newton)

Min.

220

(979)

Max. Stall

495

(2202)

Valve

Size

1-1/4" to 2"

2-1/2" to 4"

or 5”

2-1/2" to 4"

or 5”

2-1/2" to 4"

or 5”

ACCESSORIES

AM-763 1/8” Hex crank for manual override AM-756 Metric conduit adapter M20 x 1.5 to 1/2” NPT AM-731 Mounting kit - Mx51-720x (stem extension, lock washer, jam nut, and connecting

pin; included with actuator)

AM-732 Mounting kit - Mx61-720x (stem extension, lock washer, jam nut, and connecting

pin; included with actuator) AM-733 Retrofit kit - discontinued VB-9xxx 1-1/2 to 2" valves after 9404 date code AM-734 Retrofit kit - discontinued VB-9xxx -1/2 to 2" valves prior to 9404 date code

MSx1-7203

AM-703 Input rescaling module, adjust signals to 2-10 Vac, zero and span adjust AM-704 Interface, pulse width modulation (PWM) AM-705 Positioner (NE MA 4 housing) AM-706 Min and/or manual positioner for flush panel mount AM-708 500 Ω resistor for 4 to 20 mAdc control signal

Page 5

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. For VB-8xx3 valve applications, consult the Vx-8xxx Selection Guide, F-27199.

TYPICAL TWO POSITION CONTROL (wiring diagrams)

Figure-1 illustrates typical wiring diagrams for spring return MAx1-720x Series spring return two-position actuators. See Table-1 for model selection.

24 Vac Transformer

or 22-30 Vdc

Line

Volts

SPST Control Contact

Blk

Red

Com

Hot (+DC)

Grn/Yel

MA51-7203 MA61-7203

120 Vac or

230 Vac

Voltage Wire 1 Wire 2

120 Vac White Black

230 Vac Blue Brown

L1 N L2 H

Wire No. 1

Wire No. 2

Com

Hot

Grn/Yel

MA51-7200 MA51-7201 MA61-7200 MA61-7201

1 Provide overload protection and disconnect as required.

2 Actuators mounted on separate valves may be wired in

parallel. Power supply black wires are connected to the transformer common and power supply red wires are connected to the hot lead. Power consumption must be observed.

Figure-1 Typical Wiring Diagrams for Two Position Actuators.

Page 6

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.

24 Vac Transformer

or 22-30 Vdc

Line

Volts

Controller

24 Vac Transformer

or 22-30 Vdc

Line

Volts

Typical

Floating

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

Common Transformer, F-26363

Black

Red

Blue

Yellow/Black

Common

Hot (+DC)

Extend

Retract

Green/Yellow

EN-206, Guidelines for Power Multiple Devices from a

for detailed information.

MF51-7203 MF61-7203

1 Provide overload protection and

disconnect as required.

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.

Figure-2 Floating Point Control.

Hot

Controller

Common

Black

Red

Blue

Yellow/Black

Green/Yellow

Figure-3 Triac Source.

Common

Hot (+DC)

Extend

Retract

MF51-7203 MF61-7203

1 Provide overload protection

and disconnect as required.

2 If the controller uses a full-

wave power supply and does not provide isolated outputs, a separate transformer is required.

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.

Page 7

24 Vac Transformer

Line

Volts

or 22-30 Vdc

Common

Hot

Controller

Black

Red

Blue

Yellow/Black

Figure-4 Triac Sink.

Common

Hot (+DC)

Extend

Retract

Green/Yellow

MF51-7203 MF61-7203

1 Provide overload protection and

disconnect as required.

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. The actuator Hot must be connected to the controller Common.

4 If the controller uses a full-

wave power supply and does not provide isolated outputs, a separate transformer is required.

24 Vac Transformer

or 22-30 Vdc

Line

Volts

Hot

Controller

Common

24 Vac Transformer

or 22-30 Vdc

Line

Volts

Black

Red

Blue Extend

Yellow/Black

Common

Hot (+DC)

Retract

Green/Yellow

Figure-5 Triac Sink With Separate Transformers.

MF51-7203 MF61-7203

1 Provide overload protection

and disconnect as required.

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 actuator Hot must be

connected to the controller Common.

4 If the controller uses a full-

wave power supply and does not provide isolated outputs, a separate transformer is required.

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.

Line

Volts

Control Signal

2 to 10 Vdc

Feedback Signal

2 to 10 Vdc

Transformer

or 22- 30 Vdc

Line

Volts

Control Signal

4 to 20 mA

Feedback Signal

2 to 10 Vdc

Caution:

powered off transformers used to power other devices utilizing non-isolated full-wave rectifier power supplies. Refer to

Common Transformer, F-26363

2 to 10 Vdc Proportional Control

24 Vac

Transformer

or 22- 30 Vdc

Gra

Blk

Red

Yel/Blk

Blu AO

(-) (+)

4 to 20 mAdc Proportional Control

24 Vac

Com

Yel/Blk Blu

(-)

(+)

500 Ω

Gra

Blk

(-)

(+)

To Additional

Actuators

This product contains a half-wave rectifier power supply and must not be

EN-206, Guidelines for Powering Multiple Devices from a

for detailed information.

MSX1-7203

L R

MSX1-7203

L R

1 Provide overload protection and disconnect

as required.

2 With four actuators wired to one 500 ohm

resistor, a +2% shift of the control signal may be required. (Actuator input impedance is 80 k ohm.)

3 A field-supplied 500 ohm resistor (AM-708)

is required between the gray and yellow/black leads to convert the 4 to 20 mAdc control signal to 2 to 10 Vdc.

4 Only connect common to negative (-) leg of

control circuits.

5 To reverse actuator control function

(direct/reverse action), use the reversing switch, see Figure-9.

Com

Hot (+DC)

Grn/Yel

Hot (+DC)Red

Grn/Yel

Figure-6 Typical Wiring Diagrams for Proportional Control 24 Vac Basic Models.

Page 9

Line

Volts

Control Signal

2 to 10 Vdc

Two Actuators Wired in Parallel

24 Vac

Transformer

or 22- 30 Vdc

Gra

Blk

Red

Yel/Blk

Com

Hot (+DC)

(-) (+)

Blu

Grn/Yel

MSX1-7203

L R

1 Provide overload protection and disconnect

as required.

2 To reverse actuator control function

(direct/reverse action), use the reversing switch, see Figure-9.

Gra

Blk

Red

Yel/Blk

Figure-7 Typical Wiring Diagrams for Proportional Control 24 Vac Models Wired in Parallel.

Com

Hot (+DC)

Grn/Yel

MSX1-7203

L R

INSTALLATION

Inspection Inspect the package for damage. If damaged, notify the appropriate carrier immediately. If

undamaged, open the package and inspect the device for obvious damage. Return damaged products.

Requirements • Job wiring diagrams

• Appropriate accessories

• Pliers for removing and inserting connecting pin

• Installer must be a qualified, experienced technician

• Tool-37, 1-1/2" to 3" adjustable spanner wrench for valve mounting nut

• 5/16" (Tool-20-1) and 3/4" open-end wrench for stem jam nuts

• 1/8" Allen wrench

• Size 10 IP Torx Plus bit (Mx51 units only)

Precautions General

Warning:

• Electrical shock hazard! Disconnect the power supply (line power) before installation to

prevent electric shock and equipment damage.

• Make all connections in accordance with the job wiring diagram and in accordance with

national and local electrical codes.

• Floating and Proportional Models: These products contain a half-wave rectifier power

supply. They must not be powered with transformers that are used to power other devices utilizing non-isolated full-wave rectifier power supplies. Refer to EN-206, Guidelines For Powering Devices From A Common Transformer, F-26363 for detailed information.

Use copper conductors only.

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.

20 10 0

-5

Scale markings indicate degrees rotation of hub

-5

Figure-8 Position Indicator

• Do not drill holes in actuator body. Six pre-drilled holes are located on each side, under

crosshairs on the label, to accept #10-24 thread-forming screws for mounting accessories.

Federal Communications Commission (FCC)

Note:

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in residential installations. This equipment generates, uses, and can radiate radio frequency energy and may cause harmful interference if not installed and used in accordance with the instructions. Even when instructions are followed, there is no guarantee that interference will not occur in a particular setting—Which can be determined by turning the equipment off and on—the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment to an outlet on a circuit different from that to which the receiver

is connected.

• Consult the dealer or an experienced radio/television technician for help.

Canadian Department of Communications (DOC)

Note:

This Class B digital apparatus meets all requirements of the Canadian InterferenceCausing Equipment Regulations.

Cet appareil numerique de la classe B respecte toutes les exigences du Reglement sur le material broilleur du Canada.

European Standard EN 55022

Warning:

environment this product may cause radio interference in which case the user may be required to take adequate measures.

Location

Caution:

explosive vapors are present.

This is a Class B digital (European Classification) product. In a domestic

Avoid locations where excessive moisture, corrosive fumes, vibration, or

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. Refer to Figure-15, Figure-16, and Figure-17.

Actuator Selection

Mx51 series actuators are used on 1-1/4" to 2" VB-7xxx valves. Mx61 series actuators are used on 2-1/2" to 4" VB-931x, 2-1/2" to 5" VB-8xxx, and discontinued 1-1/2” to 4” VB-9xxx valves (with AM-733 or AM-734kit purchased separately).

Changing Control Function (proportional units only)

These actuators are equipped with a switch to control the function of the signal as received. See Figure-9.

Rack

Switch on R

Switch on L

Caution:

moves the actuator against the -5° positive stop. Example: Viewing the actuator from the left side with the switch set to “R” and an increasing signal. The actuator will attempt to rotate beyond the -5° stop and will stall.

Rack extends on increasing signal

Rack retracts on increasing signal

These are spring return actuators. It is possible to switch to a direction that

• Install all two-way valves so that they close against the flow. An arrow on the valve body

or a tag indicates the proper flow direction.

• Always install three-way mixing valves with two inlets and one outlet.

• Install three-way diverting valves with one inlet and two outlets. When piped for mixing,

Cv’s may differ slightly.

Viewed from "R" side:

LOCK

Viewed from "L" side:

LOCK

Switch on L

Switch on R

Rack

Rack extends on increasing signal

Rack retracts on increasing signal

Figure-9 Rotation Switch Settings for MSx1-7203 Proportional Actuators.

Page 12

Table-2 Valve Configuration Chart.

Valve Body Valve Body Action

VB-721x VB-7253 VB-7273 VB-821x

VB-921x

Two-Way Stem Up Open Up Open Port A to AB flow decreases as actuator extends

VB-722x VB-7263 VB-7283 VB-822x

VB-922x

VB-731x VB-931x

Two-Way Stem Up Closed Up Closed Port A to AB flow increases as actuator extends

Three-Way Mixing Up B to AB

VB-732x Three-Way Diverting Up B to AB

VB-8303 Three-Way Piped as Mixing

VB-8303 Three-Way Piped as Diverting

Discontinued.

Universal diverting/mixing valve, may be piped as either mixing or diverting.

Normal Position

Valve Stem Flow

Up AB to B

Up B to AB

Action

Port A to AB flow increases as actuator extends

Port B to AB flow decreases as actuator extends

Port B to A flow increases as actuator extends

Port B to AB flow decreases as actuator extends

Port A to B flow increases as actuator extends

Port AB to B flow decreases as actuator extends

Port B to A flow increases as actuator extends

Port B to AB flow decreases as actuator extends

Linear Actuator

Mounting Bracket

Stem Extension

Hex Mounting Nut*

Valve Body*

Label

Rack

Manual Override

Set Screw

Connecting Pin

Lock Washer

Jam Nut

Valve Stem*

* Not included with linear actuator.

Figure-10 Mx51-720x Series Actuator Exploded View.

Page 13

Mounting Bracket

Hex Mounting Nut*

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.

Linear Actuator

Label

(both sides)

Rack

Stem Extension

Valve Body*

Installation: Mx51-720x Series Actuator to 1-1/4" to 2" VB-7xxx Series Valve Bodies, Stem-Up Closed or Open, 2-Way and 3-Way

A. Install the actuator onto the valve. Set up the assembly according to the numbered steps

B. Apply power to the actuator and check the system operation for heating or cooling output

Manual Override

Lock Washer

Jam Nut

Set Screw

Connecting Pin

Valve Stem*

*Not included with linear actuator.

in Figure-11.

1. Locate the jam nut that came packaged with the actuator.

2. Screw the jam nut onto the valve stem all the way as far as it will go. You may need to use a 5/16" (Tool-20-1) open-end wrench. At least 1/2" of the valve stem threads should extend above the nut.

3. Place lock washer over valve stem.

4. Thread the stem extension onto the valve stem, making contact with the lock washer and jam nut.

5. Ensure 15° or 1-1/2 turns of manual override for actuator preload. See Figure-18.

6. Orient the actuator mounting bracket on the valve and tighten the mounting nut securely against the bracket using Tool-37. Raise the valve stem to the full up position.

7. Rotate stem extension until the through hole lines up with the through hole of actuator rack. Insert connecting pin to secure stem extension and tighten jam nut against stem extension using 5/16" (Tool-20-1) open end wrench.

8. Affix open/closed label to the indicator in the appropriate position.

9. Insert set screw (packaged with actuator) into the most accessible side. Tighten with size 10 IP Torx Plus bit to 20 - 25 lb-in (2.3 to 2.8 N-m).

in response to the control signal.

Page 14

Linear Actuator

Mounting Bracket

Hex Mounting Nut*

Lock Washer

Rack

Label

Manual Override

Lock Washer

Valve Body*

Stem Extension

Figure-12 Mx61-720x Series Actuator Exploded View.

Connecting Pin

Jam Nut

Valve Stem*

* Not included with linear actuator.

Page 15

Linear Actuator

(both sides)

Rack

Label

Manual Override

Mounting Bracket

Mounting Nut*

Lock Washer

Valve Body*

Stem Extension

Connecting Pin

Lock Washer Jam Nut

Valve Stem*

*Not included with linear actuator.

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. Set up the assembly according to the numbered steps

in Figure-13.

1. Locate the jam nut that came packaged with the actuator.

2. Screw the jam nut onto the valve stem all the way as far as it will go (you may need to use a 3/4" open-end wrench). At least 1/2" of the valve stem threads should extend above the nut. Place the lock washer over the valve stem.

3. Thread the stem extension onto the valve stem, making contact with the lock washer and jam nut.

4. Ensure 15° or 1-1/2 turns of manual override actuator preload. See Figure-18.

5. Orient the actuator mounting bracket on the valve, place lock washer over valve stem and tighten the mounting nut securely against the bracket using spanner wrench. Raise the valve stem to the full up position.

6. Rotate stem extension until the through hole lines up with the through hole of actuator rack. Insert connecting pin to secure stem extension and tighten jam nut against stem extension using 3/4" open end wrench.

7. Affix open/closed label to the indicator in the appropriate position.

B. Apply power to the actuator and check the system operation for heating or cooling output

in response to the control signal.

Page 16

Linear Actuator

(both sides)

Rack

Label

Manual Override

Mounting Bracket

Mounting Nut*

Valve Body*

Stem Extension

Lock Washer

Connecting Pin

Lock Washer

Jam Nut

Valve Stem*

*Not included with linear actuator.

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. Set up the assembly according to the numbered steps

in Figure-14.

1. Locate the jam nut that came packaged with the actuator.

2. Screw the jam nut onto the valve stem all the way as far as it will go (you may need to use a 3/4" open-end wrench). At least 1/2" of the valve stem threads should extend above the nut. Place the lock washer over the valve stem.

3. Thread the stem extension onto the valve stem, making contact with the lock washer and jam nut.

4. Orient the actuator mounting bracket on the valve. Place lock washer over valve stem and tighten the mounting nut securely against the bracket using spanner wrench. Ensure the valve stem is completely pushed down.

5. Insert the hex wrench into manual override and crank to extend the actuator rack to its fully extended position, back off 1-1/2 turn, and lock (see Figure-18). Remove hex wrench to prevent accidental spring return of the actuator.

6. Rotate stem extension until the through hole lines up with the through hole of actuator rack. Insert connecting pin to secure the assembly. Tighten jam nut against stem extension using 3/4" open end wrench.

7. Affix open/closed label to the indicator in the appropriate position.

B. Apply power to the actuator and check the system operation for heating or cooling output

in response to the control signal.

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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).

Caution:

Linear actuators are designed to effectively support its own weight. No load or weight should be resting on the actuator as long term damage may occur to the actuator, the mounting connection, or the valve.

• Do not insulate the actuator/linkage. Doing so will result in excess heat buildup within

the actuator.

• On non-steam applications the globe valve assembly must be mounted so that the

actuator is at least 5° above the horizontal (Figure-15) to ensure that any condensate that forms will not travel into the mounting bracket or actuator.

• On steam applications, the globe valve assembly must be mounted at 45° from

vertical. (Figure-16).

Mounting Angle Range for Non-steam Applications (either side)

0°

85°

Figure-15 Typical Mounting Position.

Page 18

0°

45°

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.

45°

360° Rotation Range

Figure-17 Actuator Positioned Anywhere Within 360 Degrees.

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MANUAL OVERRIDE OPERATION

Insert the hex wrench fully

into the manual override mechanism.

Rotation Indicator Triangle

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.

When necessary, the manual override mechanism may be used to reposition the actuator at any point between -5° and 85°. This mechanism is accessible on both sides of the actuator and can be used to ensure tight close-offs for valves.

LOCK

When finished, lock the manual override by turning the screwdriver CW (in the direction of the arrow).

Figure-18 Manual Override.

Unlock

LOCK

When using the manual override mechanism:

Manual Override Locking Mechanism

• Fully engage the hex wrench in the manual

override before cranking.

• When operating the manual override, ensure

proper release by backing off 5° from the full extended mechanical stop.

Caution:

• Only use manual override when the actuator drive motor is not powered.

• Engaging the manual override when the actuator is powered will cause damage to the

gears.

• Using power tools to adjust the override will cause damage to the gears.

• Avoid manually repositioning the actuator beyond its adjustable travel limit setting.

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

CHECKOUT

After the entire system has been installed and the actuator has been powered up, the following check can be made for proper system operation. Check for correct operation of the valve while actuator is being stroked.

1. Apply power to the actuator. Actuator and valve should be driven to their powered position as determined by the control signal.

2. Remove power from the actuator. Actuator and valve should return to the spring return position.

Note:

Check that the transformer(s) are sized properly. (24 Vac)

• If a common transformer is used with multiple actuators, make sure that polarity is

observed on the secondary. This means connecting all black wires to one leg of the transformer and all red wires to the other leg of the transformer.

• If multiple transformers are used with one control signal, make sure all black wires are

tied together and tied to control signal negative (-).

• If the controller uses a full-wave power supply and does not provide isolated outputs, a

separate transformer is required.

Part Number

MAx1-7203 —

MFx1-7203

MSx1-7203

12 AWG14 AWG16 AWG18 AWG20 AWG22 AWG

500

(152)

600

(183)

Maximum Wire Run in ft. (m)

330

(101)

300 (91)

380

(116)

200

(61)

200

(61)

240

(73)

130

(40)

130 (40)

150 (46)

——

(24)

(27)

(15)

(18)

THEORY OF OPERATION

MAINTENANCE

The MA, MF and MS series actuators are directly mounted onto the valve without the use of separate linkage. They are equipped with true mechanical spring return operation for reliable, positive actuator operation in the unpowered condition.

Linear series actuators use a brushless DC motor which is controlled by a microprocessor. The microprocessor supplies the intelligence to provide a constant motion rate and to know the actuator’s exact normal position and to match actuator mechanical stroke to the control input signal range on proportional (MS) models. The microprocessor monitors and controls the brushless DC motor’s rotation and provides a digital rotation sensing function to prevent damage to the actuator in a stall condition. The actuator may be stalled anywhere in its normal rotation without the need of mechanical switches.

When power is applied to two-position (MA) models, the actuator moves to its full stroke position, at the same time tensing the spring return mechanism. When power is removed, the spring returns the actuator to its normal position.

When power is applied to floating (MF) and proportional (MS) models, the actuator first moves to its zero position, then moves to the position dictated by the control input signal. For proportional (MS) models, when the actuator encounters a stall condition (end of valve stroke), it recalibrates itself if necessary so that its mechanical stroke matches the control signal input span. The feedback signal range is also matched to the mechanical stroke. If power is lost, the actuator spring returns to its normal position.

Regular maintenance of the total system is recommended to assure sustained optimum performance. The Linear series actuators are maintenance free.

Page 21

FIELD REPAIR

DIMENSIONAL DATA

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.

10-9/16 (268)

2-33/64

(64)

(178)

(103)

LOCK

9-1/4 (235)

Minimum clearance: 5" for actuator removal.

Figure-19 Mx51-720x Spring Return Valve Actuator Dimensions.

9/16 (14)

(103)

10-9/16 (268)

LOCK

Dimensions shown are in inches (mm).

2-33/64

(64)

9-1/2

(241)

Dimensions shown

are in inches (mm).

9-1/4 (235)

Minimum clearance: 5" for actuator removal.

Figure-20 Mx61-720x Spring Return Valve Actuator Dimensions.

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F-27120-4

TAC

1354 Clifford Avenue P.O. Box 2940 Loves Park, IL 61132-2940

www.tac.com