CO and stove

MIKE6

Tested a stove and found the stove was fine.BUT the pots pans griddles etc used on the top burners at times produced over 1000 ppm.It seemed the larger the cooking unit the more co it produced

ed wallace

CO and stove

was wondering can a testo be used to test CO on a stove if not whats the best way to test a stove for CO

Mark Hunt

Yes they can


but the Testo units are slower to respond than the Bacharac units due to the small air sampling rate. You will not be able to see spikes, but for steady state the Testo is fine.

Mark H

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ed wallace

CO and stoves

thank you mark

Mark Hunt

Impinging the flame


will cause extreme CO.

Happens every time.

Good catch though!! At least you are testing!

Mark H

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Steamhead

Ed, the first thing I did

when I got my 325-1 was test my stove. The oven was over 1100 PPM! Corrected the impingement problem and it went down below 20 PPM. Top burners were a bit high when I tested them with pans of cold water to duplicate actual use, again due to impingement. I got them down too.

So yes, Testos do fine on stoves- even late-1960s ones like my Norge.

Mike, you may need to open the air shutters or adjust the input rates on those burners to stop the impingement. I've even seen some brand-new ones that were way off.

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Dale

Good for you

Yes, test the stoves. On the older ones or whenever possible take a look at the air inlet at the oven burner. Sure sometimes your pants stick to the floor but you'll find lots of stuff that can go to the shop vac. Then fire the oven burner and look at the flame and how it hit the flame spreader. Ovens are MADE to impinge and always start cold so don't expect to see low reads on startup. Look in the oven cavity for alum. foil covering the air holes on the oven bottom edge. Then let it warm up for at least 5 minutes and take a read at the vent, it should be less than 100ppm with a testo. A pan of cold water with the high input burner ( they're not the same) on high will show some CO on start, just like a new water heater with cold water in it. Test about a foot over the burners. On new stoves the air isn't adjustable but on some the burner covers can be mixed small to big and cause CO. Always test on propane conversions, I see alot of ovens that are never coverted to LP. Don't forget the little lp/nat switch behind the oven stat.