Tekmar 741 Installation & Operation Manual

Installation & Operation Manual
Actuating Motor 741
The Actuating Motor 741 is designed to operate any of the tekmar 3-way and 4-way brass mixing valves from type 710
through to type 724. The 741 provides 6 N•m (53 in•lbs) of torque over a 90° rotation. The actuating motor rotates its output
shaft whenever 24 V (ac) is applied between either the counter clockwise (
terminal. The motor is compatible with any control having a 24 V (ac) floating output.
Installation
STEP ONE -------------- -------------- GETTING READY ----------------------------------------------------------------------------------------------------
Check the contents of the package. If any of the items listed below are missing or damaged, please refer to the Limited Warranty
and Product Return Procedure on the back of this brochure and contact your wholesaler or local tekmar representative.
Type 741 includes:
STEP TWO ------------- ------------- MOUNTING -----------------------------------------------------------
• • Remove the manual valve handle from the mixing valve.
• • Thread the two anti-rotation bolts to the two top holes on the valve body.
• • Use the following chart to select the proper coupler:
Type
710, 711, 712, 713, 714
720, 721, 722, 723, 724
• • The arrow on the coupler points towards the valve body. Place the coupler onto the
valve shaft.
• • Set the actuating motor's automatic / manual selector to the manual setting.
• • Place the actuating motor onto the coupler. Ensure that the actuating motor's rotation
range matches that of the mixing valve. Manually rotate the valve using the actuator
hand wheel.
• • Ensure the actuating motor's hand wheel position indicator (clear plastic film with
red stripe) indicates the proper direction to open the valve. If required, the clear
position indicator can be reversed.
• • Remove the hand wheel and fasten the actuating motor to the mixing valve using
the screw under the hand wheel. Replace the hand wheel when finished.
• • Set the actuating motor's automatic / manual selector to the automatic setting.
STEP THREE ---------- ---------- WIRING ----------------------------------------------------------------
• • Use a Phillips screwdriver to remove the two screws on the top of the actuating motor to remove the wiring cover.
• • All electric wiring enters the actuating motor through the 1/2" (12 mm) conduit hole on the bottom. Standard 18 AWG solid
wire is recommended for all connections to the motor terminals.
The actuating motor is not suitable for use with rigid conduit.
• • The diagram below shows wiring for clockwise to open. Reverse the Open and Close wires for counter clockwise to open.
• • Use the Test button on the mixing control to verify that the mixing valve fully opens and closes.
• • The protection provided by the equipment may be impaired if not installed in a manner specified by these instructions.
Clockwise
R R
to Open
C Opn Cls
Mixing Control
Powered Output
----------------------------------------------------------------------------------------------------
• One Actuating Motor 741, One coupler with white arrow, One coupler with red arrow, One
hand wheel with red indicator stripe, Two anti-rotation bolts & One Manual 741_D.
-----------------------------------------------------------
Coupler Arrow Color
White
Red
----------------------------------------------------------------
C
1 2 3
Actuating Motor 741
) or clockwise (
C C R R
R Opn Cls
Class 2
Mix
Transformer
Mixing Control
24 V (ac)
Unpowered Output
1 of 2
741_D
03/14
Accessories Replaces: 12/08
) terminals and the Com
Hand Wheel
Actuating
Motor
Coupler
Anti-Rotation
Bolts
Valve
Clockwise
C
to Open
1 2 3
Actuating Motor 741
© 2014 741_D - 03/14