User Guide
Table Of Contents
- Application
- Features
- . Two position models controlled by SPST controller
- . Floating models controlled by SPDT floating controllers
- . Proportional models controlled by 0-3 Vdc, 6-9 Vdc, 0-10 Vdc, 0-20 mAdc, 2-10 Vdc, or 4-20 mAdc. Control function direct/reverse action is jumper selectable
- . 105 lb force (467 newton) with 1/2" (13 mm) nominal linear stroke
- . 24 Vac, 120 Vac, and 230 Vac models
- . Rugged polymer housings rated for up to NEMA 2/IP54
- . Overload protection throughout stroke
- . Automatically sets input span to match valve travel
- . Compact size to allow installation in limited space
- . Manual override to allow positioning of valve and preload
- . Spring return operation
- . Direct mount to valves without separate linkage
- . Polymer housing rated for plenum use
- . Five year warranty
- Applicable Literature
- SPECIFICATIONS
- TYPICAL TWO POSITION CONTROL (wiring diagrams)
- Figure-1 Typical Wiring Diagrams for Two Position Actuators
- TYPICAL FLOATING CONTROL (wiring diagrams)
- TYPICAL PROPORTIONAL CONTROL (wiring diagrams)
- INSTALLATION
- Figure-8 Wire Diagram Notes Guide
- Inspection
- Requirements
- Precautions
- Location
- Mounting
- Changing Control Function (proportional units only)
- Installation: Mx51-710x Series Actuator to 1/2" to 2" VB-7xxx Series Valve Bodies, 2-Way Stem-Up Closed and 3-Way Mixing or Diverting Applications
- A. Preload the valve to insure proper close-off according to the numbered steps in Figure-10 and the text below. (Remove power before proceeding.)
- 1. Locate the steel jam nut that came packaged with the actuator. (Do not re-use the brass jam nut present on an existing valve.)
- 2. Screw the nut onto the valve stem all the way as far as it will go (you may need to use a TOOL-20-1 or a 5/16” open-end wrench). At least 1/2” of the valve stem should extend above the nut.
- 3. Thread the stem extension onto the valve stem, making contact with the jam nut. Raise the valve stem to the full up position.
- 4. Orient the actuator mounting bracket on the valve and tighten the hex mounting nut securely against the bracket using TOOL-37.
- 5. Insert the crank provided in the actuator cover. Wind the crank two turns counterclockwise. Press in the turn crank 1/8 turn counterclockwise to lock in position.
- 6. Rotate the stem extension until the through holes in the stem extension and rack line up. Insert connecting pin to secure stem extension and tighten jam nut against stem extension using TOOL-20-1 or a 5I16” open end wrench.
- B. Apply power to the actuator and check the system operation for heating or cooling output in response to the control signal.
- Installation: Mx51-710x Series Actuator to 1/2" to 2" VB-7xxx Series Valve Bodies, 2-Way Stem-Up Open
- A. Preload the valve to insure proper close-off according to the numbered steps to 10 and the text below. (Remove power before proceeding.)
- 1. Locate the steel jam nut that came packaged with the actuator. (Do not re-use the brass jam nut present on an existing valve.)
- 2. Screw the nut onto the valve stem all the way as far as it will go (you may need to use a TOOL-20-1 or a 5/16” open-end wrench). At least 1/2” of the valve stem should extend above the nut.
- 3. Thread the stem extension onto the valve stem, making contact with the jam nut. Push the valve stem to the full down position.
- 4. Orient the actuator mounting bracket on the valve and tighten the hex mounting nut securely against the bracket using TOOL-37.
- 5. Insert the crank provided in the actuator cover. Wind the crank counterclockwise until the actuator fully extends, then unwind 2 turns and press in and turn crank 1/8 turn counterclockwise to lock in position.
- 6. Rotate the stem extension until the through holes in the stem extension and rack lineup. Insert connecting pin to secure stem extension and tighten jam nut against stem extension using TOOL-20-1 or a 5I16” open end wrench.
- B. Apply power to the actuator and check the system operation for heating or cooling output in response to the control signal.
- Valve Mounting
- 1. Following general piping practices is recommended.
- 2. Apply pipe sealant sparingly to all but the last two threads of a properly threaded, reamed, and cleaned pipe. Make sure the ...
- 3. Start the joint hand-threading the pipe into the valve. If the thread alignment feels normal, continue to turn the pipe by hand as far as it will go.
- 4. Use a pipe wrench to fully tighten the pipe to the valve.
- 5. Insulate only the valve body and associated piping, not the actuator.
- 6. In chilled or cold water systems where the environment is humid, use a drip pan under the valve to catch condensate.
- Figure-11 Acceptable Mounting Orientations for Non-Steam Applications
- Figure-12 Acceptable Mounting Orientation for Steam Applications
- 1. Following general piping practices is recommended.
- MANUAL OVERRIDE OPERATION
- Figure-13 Unacceptable Mounting Orientation
- 1. Disconnect power from the actuator. The actuator will fully retract.
- 2. Without pushing down on the crank, crank the manual override counterclockwise until the actuator extends to the desired position. Push in until the mechanism locks in position. (The manual override lock will release the next time power is applied.)
- 3. If you desire to reposition the actuator manually from a locked position, turn the crank 1/8 turn counterclockwise and pull out to release. Adjust position as desired.
- Wiring Requirements
- Table-2 Power Wiring
- CHECKOUT
- THEORY OF OPERATION
- MAINTENANCE
- FIELD REPAIR
F-27169-5 © Copyright 2007 TAC All Rights Reserved. 7
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 5/8” open end wrench for valve mounting nut
• 5/16” and 7/16” open-end wrench for stem jam nuts and stem extension
• #8 Torx screwdriver (not provided)
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. Use copper conductors only.
• 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.
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), back off 5° from full
extended mechanical stop to ensure proper release.
• Use with fluid temperatures above 100°C requires insulation on the pipe and control
valve.
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
1 Provide overload protection and disconnect as
required.
2 Actuators may be wired (120V mA does not have red
wire and 230V mA does not have red or black wires)
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.
5 A field-supplied 500 ohm resistor (AM-708) is
required for this application.
6 On MS51-7103-X60 (4-20 mAdc) models a 500
ohm resister is incorporated in the product. Do
not use an external resistor.
7 If using multiple MS51-7103-040's with TAC
System 8000 controller requiring 20 Vdc
power; tape off red +20 Vdc power supply
leads on all but one actuator.
8 Cable on some models contains more wires
than are used in applications. Only those
wires actually used are shown.
Figure-8 Wire Diagram Notes Guide