Loss of draft buzzer

Loss of draft buzzer

PostBy: Carbon12 On: Sat Nov 23, 2013 5:51 pm

I took an old loss of vacuum detector for a radon abatement system and tinkered with it. The factory calibration was to alarm if vacuum dropped below 0.25 inches WC. WAY to high for loss of draft purposes. Removed a seal and found the calibration screw. Played with it quite a bit using my Dwyer as a reference. It kind of works. Setting the calibration screw for just the right amount of draft is tricky. I can't really get it set for .01-.02 but I could calibrate it for for 0 draft. I may temporarily mount it to see how many false alarms it produces. Who's got tinkeritis now??? :lol:
Last edited by Carbon12 on Sat Nov 23, 2013 6:14 pm, edited 1 time in total.
Carbon12
 
Stoker Coal Boiler: Keystoker KA-6
Coal Size/Type: Rice/Anthracite
Other Heating: Heat Pump/Forced Hot Air Oil Furnace

Re: Loss of draft buzzer

PostBy: waldo lemieux On: Sat Nov 23, 2013 5:58 pm

Who is Peter Pan, Alex...
waldo lemieux
 
Stove/Furnace Make: efm
Stove/Furnace Model: s-20

Re: Loss of draft buzzer

PostBy: Carbon12 On: Sat Nov 23, 2013 6:00 pm

That Pixie dust isn't as harmless as it seems,.......needed a shot to get over it :roll:
Carbon12
 
Stoker Coal Boiler: Keystoker KA-6
Coal Size/Type: Rice/Anthracite
Other Heating: Heat Pump/Forced Hot Air Oil Furnace


Re: Loss of draft buzzer

PostBy: Carbon12 On: Sun Nov 24, 2013 3:11 pm

Update: scrapping the idea. It's very windy here now. The alarm sounds whenever the stoker kicks on. The momentary rush of combustion air sets off the alarm. Also, occasionally when the wind gusts it alarms for a split second.
Carbon12
 
Stoker Coal Boiler: Keystoker KA-6
Coal Size/Type: Rice/Anthracite
Other Heating: Heat Pump/Forced Hot Air Oil Furnace

Re: Loss of draft buzzer

PostBy: Lightning On: Sun Nov 24, 2013 6:35 pm

I've considered a draft alarm too. One can be made with tube mounted vertically thats connected to the flue pipe with a thermal snap disc switch at the end of it. When a draft failure occurs, the flue gases will go up the tube and warm the snap disk. So, lets say at 120 degrees the snap disc closes and a train horn could be activated :lol:

This way would provide fewer false alarms from small temporary draft fluxuations since it would take a minute to warm the snap disc.
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut/Stove Size Mix

Re: Loss of draft buzzer

PostBy: Flyer5 On: Thu Nov 28, 2013 9:15 pm

Lightning wrote:I've considered a draft alarm too. One can be made with tube mounted vertically thats connected to the flue pipe with a thermal snap disc switch at the end of it. When a draft failure occurs, the flue gases will go up the tube and warm the snap disk. So, lets say at 120 degrees the snap disc closes and a train horn could be activated :lol:

This way would provide fewer false alarms from small temporary draft fluxuations since it would take a minute to warm the snap disc.



That would be a WMO switch
Flyer5
 
Stoker Coal Boiler: Leisure Line WL110
Hot Air Coal Stoker Stove: Leisure Line Pioneer

Re: Loss of draft buzzer

PostBy: Lightning On: Thu Nov 28, 2013 9:38 pm

Flyer5 wrote:That would be a WMO switch

Cool. Could you show me one?
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut/Stove Size Mix

Re: Loss of draft buzzer

PostBy: Flyer5 On: Thu Nov 28, 2013 9:46 pm

Flyer5
 
Stoker Coal Boiler: Leisure Line WL110
Hot Air Coal Stoker Stove: Leisure Line Pioneer

Re: Loss of draft buzzer

PostBy: Lightning On: Thu Nov 28, 2013 9:49 pm

Yeah that's cool.. Is there one that would turn on a draft inducer for a hand fed stove?
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut/Stove Size Mix

Re: Loss of draft buzzer

PostBy: Flyer5 On: Thu Nov 28, 2013 10:13 pm

Lightning wrote:Yeah that's cool.. Is there one that would turn on a draft inducer for a hand fed stove?



These open on rise in temp. You can use a NC relay.
Flyer5
 
Stoker Coal Boiler: Leisure Line WL110
Hot Air Coal Stoker Stove: Leisure Line Pioneer

Re: Loss of draft buzzer

PostBy: Lightning On: Fri Nov 29, 2013 8:01 am

I took a closer look at those. THe one that would apply to my use is triggered at 160 degrees. That's too high. My chimney looses draft at under 130 degrees on the pipe. And its shown mounted under the baro? Since when did heat sink? lol I don't get how that's gonna work :lol:
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut/Stove Size Mix

Re: Loss of draft buzzer

PostBy: Flyer5 On: Fri Nov 29, 2013 10:59 pm

Lightning wrote:I took a closer look at those. THe one that would apply to my use is triggered at 160 degrees. That's too high. My chimney looses draft at under 130 degrees on the pipe. And its shown mounted under the baro? Since when did heat sink? lol I don't get how that's gonna work :lol:




What happens is under draft you are pulling air from the sensor end into the tube and inside the stove or pipe. When you lose draft hot air escapes out the tube and triggers the thermal disk and opens the switch. Of course this is all a science experiment.
Flyer5
 
Stoker Coal Boiler: Leisure Line WL110
Hot Air Coal Stoker Stove: Leisure Line Pioneer

Re: Loss of draft buzzer

PostBy: Lightning On: Sat Nov 30, 2013 9:20 am

Oh ok that makes sense. Thanks for straightening me out on that. Which part of it is the science experiment? :?
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut/Stove Size Mix

Re: Loss of draft buzzer

PostBy: titleist1 On: Sat Nov 30, 2013 9:37 am

Lightning wrote:Which part of it is the science experiment?


the part that makes nobody except you legally liable if it doesn't work right in your installation!! :lol:
titleist1
 
Hot Air Coal Stoker Stove: Harman Mag Stoker (old style) one in basement, one in workshop
Hand Fed Coal Stove: Harman Mark III on standby for long power outages
Coal Size/Type: Rice/Anthracite; Nut/Anthracite

Re: Loss of draft buzzer

PostBy: Lightning On: Sat Nov 30, 2013 10:00 am

titleist1 wrote:
Lightning wrote:Which part of it is the science experiment?


the part that makes nobody except you legally liable if it doesn't work right in your installation!! :lol:


Geez sometimes I'm such a block head...... :lol:
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut/Stove Size Mix