Fire-Out Control for Stokers?

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CoalisCoolxWarm
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Joined: Wed. Jan. 19, 2011 11:41 am
Location: Western PA
Stoker Coal Boiler: Keystoker KA-6
Hand Fed Coal Furnace: old Sears rebuilt, bituminous- offline as of winter 2014
Coal Size/Type: Anthracite Buckwheat
Other Heating: Oil Boiler

Post by CoalisCoolxWarm » Sun. Jan. 18, 2015 3:58 pm

Anyone know of a sensor being used to detect a fire-out condition in a stoker?

Looking to add this feature to my Keystoker KA-6 so it won't feed an entire hopper of coal in the event of an out fire such as an extended power outage or some malfunction.

I'm good with the relays and such, just need a reliable sensor- unless there is an industry ready made part that I haven't been able to find.

Thanks!

 
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WNY
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Location: Cuba, NY
Hot Air Coal Stoker Stove: Keystoker 90K, Leisure Line Hyfire I
Coal Size/Type: Rice
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Post by WNY » Sun. Jan. 18, 2015 4:42 pm

We've discussed this a few times, the easiest is a Temp. switch (Snap switch, or probe switch, etc..) in your exhaust wired in series with your stoker motor, set it kinda low (maybe variable). if the exhaust goes below a certain temp. Like 80-100, it will stop the stoker, if it reignites and starts burning and the exhaust gets hot enough, the stoker will start back up. if it doesn't, the stoker will remain off.

Here's some discussion.
What FIRE IS OUT Control to Use???

Another thread
Flue Temperature Sensor Interlock Device


 
User avatar
CoalisCoolxWarm
Member
Posts: 2323
Joined: Wed. Jan. 19, 2011 11:41 am
Location: Western PA
Stoker Coal Boiler: Keystoker KA-6
Hand Fed Coal Furnace: old Sears rebuilt, bituminous- offline as of winter 2014
Coal Size/Type: Anthracite Buckwheat
Other Heating: Oil Boiler

Post by CoalisCoolxWarm » Sun. Jan. 18, 2015 4:55 pm

WNY wrote:We've discussed this a few times, the easiest is a Temp. switch (Snap switch, or probe switch, etc..) in your exhaust wired in series with your stoker motor, set it kinda low (maybe variable). if the exhaust goes below a certain temp. Like 80-100, it will stop the stoker, if it reignites and starts burning and the exhaust gets hot enough, the stoker will start back up. if it doesn't, the stoker will remain off.

Here's some discussion.
What FIRE IS OUT Control to Use???

Another thread
Flue Temperature Sensor Interlock Device
Thank you!

Must've been searching with the wrong terms :oops:

I really like the idea of a timer switch to hold the stoker, too, instead of rotating the spring loaded stoker arm.

 
bobok
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Location: Richfiled Springs, ny
Stoker Coal Boiler: efm700 stoker, Pacific 350K boiler
Hand Fed Coal Boiler: D&S Machine hand fed
Coal Size/Type: stove / buck
Other Heating: Bethleham Dynatherm Oil boiler

Post by bobok » Sun. Jan. 18, 2015 5:02 pm

An Ra116 or 117, or RA817 stack switch works fine. It needs three wires: hot and common and hot returnto the stoker. found two on Ebay, one was 35 the other 25. Sid harvey sells remanned units. Just use terminal 1,2& 3, jumper TT and ignore the ignition term #4. BoboK :)

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