I Need a Actuator

hotblast1357 · Post by **hotblast1357** » Sun. Jul. 27, 2014 10:14 am

I am looking for a electronic actuator that I can run off from a thermostat to pull a chain to open my primary air for my hand fire furnace, it has to be spring return also so that if power fails it will shut, I have looked around but have not had much luck, I found a " 24v 2 Position Damper Actuator w/ arm linkage" from Honeywell which would work perfect, but it says its run times is only max of 20 seconds? Which that wont work, and its 80 bucks lol

Post by **coaledsweat** » Sun. Jul. 27, 2014 10:19 am

Call your local HVAC supply house, they should have a bunch to chose from.

hotblast1357 · Post by **hotblast1357** » Sun. Jul. 27, 2014 10:26 am

Thanks, I was more less seeing if anyone had any extras hanging around something, seems like I'm gonna be paying top dollar for a new, but in the end if I have to I have to lol

lsayre · Post by **lsayre** » Sun. Jul. 27, 2014 10:58 am

Would a 24VAC push or pull 'linear' type solenoid work? They come in all sorts of stroke lengths. Should be able to buy one as surplus.

hotblast1357 · Post by **hotblast1357** » Sun. Jul. 27, 2014 11:16 am

Um I would think so, I just need to be able to mount it to something, and it has to pull a small chain to lift a small light flap, and close when power is taken away, preferably by spring for over fire safety

Post by **Lightning** » Sun. Jul. 27, 2014 11:39 am

For over fire safety you could mount a snap switch that would cut power to it when the furnace reached a particular temperature, say like 350 degrees on the flue pipe. You don't wanna wait for the thermostat to turn it back down, it could over fire in the meantime.

McGiever · Post by **McGiever** » Sun. Jul. 27, 2014 11:45 am

That 20 seconds is how long it takes to wind/load the spring...it can be powered indefinatly.

I posted a Honeywell part no. some time ago for what you describe, price was still $80.
Google "Honeywell M847"

hotblast1357 · Post by **hotblast1357** » Sun. Jul. 27, 2014 11:53 am

Well I'm only gonna let it open enough to slightly boost the fire, I mean for if the power goes out then my plenum fan will quit so I want it to shut back down

McGiever · Post by **McGiever** » Sun. Jul. 27, 2014 12:09 pm

Electrically the actuator is either all or nothing...linkage at all open is how you limit the max open.

20 seconds to charge spring to fully actuated/open w/ near instant closure by the charged spring at power removal.

hotblast1357 · Post by **hotblast1357** » Sun. Jul. 27, 2014 12:16 pm

Which is what I'm looking for

hotblast1357 · Post by **hotblast1357** » Sun. Jul. 27, 2014 12:27 pm

I found some dormeyer solenoids that I think might work, they are used for outdoor boilers, I just can't find any info or reviews on them

crazy4coal · Post by **crazy4coal** » Sun. Jul. 27, 2014 12:49 pm

You could use a Honeywell zone valve motor 24v powered open spring close. You would have to make your own mount. Also if you get a whole zone valve take the 4 screws off the valve body , remove the ball from the arm hook the chain on. If that will work, keep you eyes open for someone putting in a new boiler, sometimes they will throw out all the valves and you can get them for next to nothing or free. Never hurts to have spares.

hotblast1357 · Post by **hotblast1357** » Sun. Jul. 27, 2014 1:18 pm

I'm not familiar with boilers that much, do all boilers have zone valve motors?

hotblast1357 · Post by **hotblast1357** » Sun. Jul. 27, 2014 1:46 pm

Disregard my last post I just looked them up, one of my buddies is putting in a new yorker and I bet he has some, I think they will work

hotblast1357 · Post by **hotblast1357** » Sun. Jul. 27, 2014 3:01 pm

crazy4coal wrote:You could use a Honeywell zone valve motor 24v powered open spring close. You would have to make your own mount. Also if you get a whole zone valve take the 4 screws off the valve body , remove the ball from the arm hook the chain on. If that will work, keep you eyes open for someone putting in a new boiler, sometimes they will throw out all the valves and you can get them for next to nothing or free. Never hurts to have spares.

Could you tell me what I would need to hook this up to a mechanic thermostat? I have one sitting in the basement that I don't use