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Tired of replacing spring return damper motors that get hot and burn out?


The Belimo to Ztech and Buetler damper retrofit kit LMB24-Kit2 gets the the premier commercial grade Belimo LMB damper motor and adapter kit. This kit will also work on virtually any Ztech, Buetler or other damper that has a round or flat shaft under 3/8 of an inch diameter. Simply remove the long pin synchron or Cramer motor, the spring, and black collar assembly and discard, and them mount the custom shaft adapter to the original damper shaft.


Included in the kit is the Belimo LMB24-3-T motor, shaft adapter with socket screws, anti rotation bracket and two self tapping sheet metal screws.


*Retrofits the industry leading LMB24-3-T motor onto Ztech and Buetler dampers recessed into duct-board plenums as shown in pictures.

*Gets rid of spring return motors for better reliability and energy savings.

*Works with any brand of standard 24vac zone control system.

*Saves energy, extends motor life, far more powerful motor with 5 year warranty.

*Requires three wires to motor and the mounting of the anti-rotation bracket with two self tapping screws, included.

*24vac 2 va damper motor


These Synchron numbers will cross over to this kit:

37944L 38572R


Spring return damper motors pull 8 to 10 va of continuous power since they must overcome the return spring. Besides wasting energy, the spring return motors get very hot, contributing to their often premature failure. The Belimo LMB24-3-T retrofit kit motor uses just 2va for 90 seconds, and never even gets warm to the touch! A five year warranty is best in the business, so stop replacing those overpriced spring return motors! 


Your current damper has just two wires to the motor, will this 3 wire motor work? Yes, and for Ztech and Buetler zone control panels, illustrated instructions show you how to add a third wire from the Ztech zone panel to the new Belimo damper motor, and you will be through with energy wasting spring return motors. You will need a third wire from the zone control panel or thermostat to allow this 3 wire motor to work-very often, standard 4 wire thermostat wire will have been used so check the cable for extra wires. Other brands of zone control panels support three wire motors, including all Honeywell panels, check your zone control board damper outputs for an unused terminal, if your damper outputs are labeled M1,M4, and M6, OR Power Open PO. Power Close PC and Common C, you have all the outputs you need and are good to go. 


Even if your zone panel has just two damper outputs, you can still use this kit since the Belimo LMB motor will accept an alternative wiring procedure that places full time 24vac power on terminals 1 and 2, and then uses the current zone board output for terminal 3. Full illustrated instructions are included.


Two-wire kits available with 24 or 120 volt motors. Please see our TFB Kit2.