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  • Honeywell M847D1012 Actuator, Spring Return Direct Mount Two Position 24 Vac
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Honeywell M847D1012 Actuator, Spring Return Direct Mount Two Position 24 Vac

66 customer reviews

List Price: $166.70
Price: $71.92 & FREE Shipping. Details
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  • Low voltage, spring-return damper actuator
  • Equipped with anti-rotation and drive shaft extensions for direct mounting to 7/16 inch diameter coupling style dampers
  • Adjustable range stops
  • Direct replacement for M847D1004
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Honeywell M847D1012 Actuator, Spring Return Direct Mount Two Position 24 Vac + Honeywell 802360JA Motor for V8043 V8044
Price for both: $99.35

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Product Description

Product Description

The M847D is a two position, 24 Vac spring return, direct mount actuator designed to operate ARD and ZD zone dampers. FEATURES:• Low voltage, spring-return damper actuator • Equipped with anti-rotation and drive shaft extensions for direct mounting to 7/16 inch diameter coupling style dampers. • Adjustable range stops. • Size (inch) - 3-1/2 inch high x 2-3/8 inch wide x 3-3/8 inch deep • Motor Mount - Direct connection to damper shaft • Motor Type - spring return (damper can be either spring open or spring closed)• Wires to Motor - 2 wires • Other Motor Information - Two Position, spst;60 in.-oz (423 mNm) at spring returned initial start position; 90 degrees rotation;Spring Return - 10 seconds de-energized, 30 seconds energized • Electrical Connections - 2 wires • Frequency - 60 Hz • Replaces - RDMH damper actuators; RDMZ damper actuators • Includes - Anti-rotation and drive shaft extensions bag assembly to be compatible with ZD and ARD dampers • Used With - ZD dampers; ARD dampers • Used in Trolatemp systems• REPLACES HONEYWELL M847D1004    

From the Manufacturer

The M847D is a two position, 24 Vac spring return actuator designed to operate ARD, EARD and ZD zone dampers.


Product Information

Technical Details
Part Number M847D1012
Item Weight1.2 pounds
Product Dimensions2.4 x 3.4 x 4.5 inches
OriginMexico
Item model numberM847D1012
Materialzinc plated steel, anodized aluminium
Item Package Quantity1
  
Additional Information
ASINB0019KFQ72
Best Sellers Rank #13,218 in Home Improvement (See top 100)
Shipping Weight1.2 pounds (View shipping rates and policies)
Domestic Shipping Item can be shipped within U.S.
International Shipping This item can be shipped to select countries outside of the U.S. Learn More
Date First AvailableMay 15, 2008
  
Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.
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Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

21 of 22 people found the following review helpful By SMartin on July 30, 2012
Verified Purchase
I have a three zone HVAC system and started to have problems with the dampers. The first time was a $90 technician call and all he did was "free" the damper. Started having some other problems and a closer inspection found that the damper was not working correctly. Purchased one of these and replaced one on my system. Works great. On closer inspection of the old unit, I noticed the nylon gears had worn badly and the motor gear was skipping on the drive gear creating a clicking noise.

While inspecting the replaced one, heard the tell-tale clicking from another damper. Replaced this one as well. The third one in my system in still working(8 years), but it is only a matter of time before it fails so I purchased a third one and I'm ready when it does. As another reviewer mentioned, the replacement is a piece of cake (one set screw and two wire nuts)and it sure beats paying the technician. There is no telling what he would charge for the part.

Like another reviewer, I'd like to have a better unit, but that may involve a different damper and different programming on my system, so this is the easy fix. Glad Amazon had these available at a good price and quick shipping.
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24 of 26 people found the following review helpful By John Loram on September 18, 2010
Verified Purchase
I have a six zone HVAC system in my home and this is the forth Honeywell zone damper actuator to fail in the six years of system operation. When you open it up and take a look at how it's design/constructed you'll understand why they don't last. Real garbage! I should have specified commercial level equipement. I would have saved money and agrevation in the long run.

Update: (2013) These Honeywell residential zone motors (actuators) have continued to to fail. At the 10th year I have replace 9 devices. My decision is to switch to Belimo LMB24-3-T commercial grade zone actuators which have a 5 year warrentee 24V on/off, floating 95 sec 24V on/off, floating 9. Oddly, they cost about the same as the Honeywell cheapo units. You should make sure that your zone controller supports three-wire actuators (Honeywell controllers do) and that you have three wires available in your installation. My installer wired everything with 7-wire cables, so I'm in fat-city!
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9 of 10 people found the following review helpful By nick t. on December 4, 2012
Verified Purchase
Low price on amazon, however, gave it a 3 rating because of the poor design. Also, found this great video on how to extend the life of these units. Took about 15 minutes to fix by rotating the gear to the other side that's not stripped. Still ordered the new one as a spare. URL blocked by amazon so search youtube for 'Honewell zone motor damper operator...fix it.' with Honeywell misspelled.
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5 of 5 people found the following review helpful By BizzTraveler26 on November 23, 2013
Verified Purchase
Just be aware, these specific M847D Honeywell Actuators have a built-in failure point: The larger gear (the driven gear) that is connected to the return spring is made from a plastic material, perhaps phenolic. This forms the gearset with the actuator motor, on which the pinion (driving gear) is mounted. The failure occurs when the plastic teeth on the larger gear finally break off and form a "dead" spot which prevents full rotation of the output shaft. When powered, the motor begins to rotate the driven gear, only to encounter the missing teeth. This produces a "clunking" or "clicking" sound which continues until the actuator is de-energized by the system control. The zone controlled by the actuator is left in the "normal" position, which might result in no airflow, or constant airflow, depending on whether it is "normally open" or "normally closed".
This is a glaring design flaw. This gear could easily be replaced with one constructed from powdered-metal or similar material. That would surely result in a longer life product. I have replaced the same actuator on my home HVAC system zone damper FOUR (4) ! times in the last 10 years. I started doing it myself after paying the HVAC guy $260 the first time! Wish there was a better device for this purpose, but I'm not an expert.
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4 of 4 people found the following review helpful By D. Richard Hipp on December 18, 2014
We have a 15-year-old 2-zone system. Recently it started making loud banging noises while moving dampers. Called the HVAC serve techs (the same company that installed the system originally) and they charged us $308.95 to replace this motor because the plastic gear was stripped out, plus a $90 diagnostic fee. The technician said they life expectancy on these things is about 10 years.

I didn't actually buy from Amazon this time - our replacement came from our HVAC contractor. But I watched the whole operation, and this unit seems really simple to install. If the other one goes out (we have one on each zone), I will definitely get a replacement here online and install it myself, and save $300+.

In our system, the dampers open via a spring and the motor drives the dampers closed. So with the power off, all dampers are open. The controller sends power to the motors continuously when it wants dampers to be closed. Once the damper reaches the end-of-travel, the motor simply binds and starts getting hot. This is how the unit is designed to work, I'm told. But the motor is only running in the infrequent case when air is requested in one zone but not the other.

I'm told there are more expensive damper motors with longer-lasting brass gears instead of nylon gears. But they are three-wire motors and are driven open and closed, both. That means the motor is running continuously - not just when closing. Our contractor uses the spring-actuated model (this one) because, while cheaper, the motor only runs infrequently, using much less power. Or so I am told by our HVAC technician.
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Honeywell M847D1012 Actuator, Spring Return Direct Mount Two Position 24 Vac
This item: Honeywell M847D1012 Actuator, Spring Return Direct Mount Two Position 24 Vac
Price: $71.92
Ships from and sold by Amazon.com

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