tekmar 742 User Manual
742_D
Actuator Motor 742
Accessories
10/13
Replaces: 08/13
Installation & Operation Manual
Introduction
The Actuating Motor 742 uses a 0-10 or 2-10 V (dc) signal to adjust the position
of a mixing valve. It is compatible with tekmar brass mixing valves 710 to 724. It
provides 88 in•lbs (10 N•m) of torque over a 90° rotation. The rotation direction
is selected by a toggle switch.
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742_D - 10/13
It is the installer’s responsibility to ensure that this control is safely installed according
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to all applicable codes and standards. This electronic device is not intended for use as
a primary limit control. Other controls that are intended and certified as safety limits
must be placed into the control circuit. tekmar Control Systems is not responsible for
damages resulting from improper installation and/or maintenance.
Read this Manual BEFORE using this equipment.
Failure to read and follow all safety and use information can result in
personal injury, property damage, or damage to the equipment.
Keep this Manual for future reference.
Installation
Check the Contents
Check the contents of this package. If any of the contents listed are missing or
damaged, please refer to the Limited Warranty and Product Return Procedure on
the back of this b rochure and contact your wholesaler or tekmar sales representative
for assistance. Type 742 includes:
One Actuator Motor 742
•
One black coupler
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One white coupler
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One screw
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One handle
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One reversible scale plate
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One anti-rotation bolt
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One Installation and Operation Manual
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742_D
Preparation
Tools Required
tekmar or jeweller screwdriver
•
Phillips No.1 head screwdriver
•
Materials Required
2 conductor, 18 AWG LVT solid wire•
Installation Location
Choose the placement of the actuator motor early in the construction process to
enable proper wiring during rough-in.
Consider the following:
Keep dry. Avoid potential leakage onto the control.
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Relative Humidity less than 95%. Non-condensing environment.
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No exposure to extreme temperatures beyond 32-122°F (0-50°C).
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Away from equipment, appliances, or other sources of electrical interference.
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Easy access for wiring and viewing.
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Wire Stripper•
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© 2013 742_D - 10/13
Step 1 - Rough In Wiring
Pull two conductor 18 AWG LVT cable, up to 500 feet (150 m) for the following:
24 V (ac/dc) power supply
•
0-10 or 2-10 V (dc) control signal from control
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Strip wire to 3/8" (10 mm) for all terminal connections.
Step 2 - Mounting
Using a Phillips screwdriver, remove the two screws in the corners of the actuator
•
cover. Remove the cover.
Thread the anti-rotation bolt into one of the threaded holes on the mixing valve.
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Do not align the anti-rotation bolt with the actuator motor corner cavity.
Install coupler onto mixing valve stem, ensuring that it is pushed all the way on.
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Black coupler: for 3-way valves 710, 711, 712, 713, 714
•
White coupler: for 4-way valves 720, 721, 722, 723, 724
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Install actuator body onto the coupler.
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Screw
Handle
Scale Plate
Actuator Motor
Anti-Rotation Bolt
Mixing Valve
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1
8
.
6
.
4
.
0
2
.
Corner Cavity
Coupler
Mixing Valve Stem
© 2013 742_D - 10/13
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