Dental lab smoke detectors

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mjf

mjf

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The incredible, yet very expensive, Hudson Valley,
One of my customers, (dental lab,- makes caps and crowns and false teeth, etc.) called yesterday about his smokes setting off in his casting room, (1600degree kilns, etc), from either heat or smoke that is created from the normal processes that he performs at least daily.

My first thought is to install a fan or exhaust fan to dissipate the heat/smoke.

Will be going there tomorrow to survey the situation.

Any thoughts, ideas, experience with this would be greatly appreciated.
 
mjf said:
One of my customers, (dental lab,- makes caps and crowns and false teeth, etc.) called yesterday about his smokes setting off in his casting room, (1600degree kilns, etc), from either heat or smoke that is created from the normal processes that he performs at least daily.

My first thought is to install a fan or exhaust fan to dissipate the heat/smoke.

Will be going there tomorrow to survey the situation.

Any thoughts, ideas, experience with this would be greatly appreciated.
Click to expand...


Yes- an Advanced Multi-Criteria Fire Detector.

www.systemsensor.com/pdf/A05-0428.pdf

It uses smoke, CO, IR and and heat to determine if there is a fire, not just % obscuration of light.

Of course you would have to talk it over with the FD, but I am sure they would be amiable to reducing false alarms.

Oh they are $$$ price it out . If you have a conventional panel and you have an alarm verification feature, turn it on for that zone.

Oh go replace it with a 135 fixed temp.

Or a flame detector. Although that is a bit more complicated to implement and $$$$$$.

EDIT: The fan would not really be a good idea, IMO. Also remember the ambient temp of smokes (heats too I believe) cannot be above 100F (UL std) All kiln rooms I have ever done get a 194 F fixed temp heat, never had a AHJ balk at that. Although multi criteria is the way to go, depending on the ambient temp. If the ambient temp is to high at the ceiling level I would go with a flame detector. I have found that, if the building is sprinkled, the AHJ will allow high temp sprinkler heads in the area, without detection, due to the false alarm problem. Of course, the alarm verification for that area would drastically reduce the chances of that.
 
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good info

good info

thanks for the info.

The system is hard wired, interconnected, but not tied into the phone lines or fire dept. There is no sprinkler system.
Won't actually look at the unit until tomorrow. I believe they are just standard photoelectric smoke detectors.
Another conversation with the owner.. the problem is that it alarms when he opens the 1600 degree kiln door. Kiln is about 3 feet from the acoustical drop ceiling and the sensor is almost directly above the kiln.
 
mjf said:
thanks for the info.

The system is hard wired, interconnected, but not tied into the phone lines or fire dept. There is no sprinkler system.
Won't actually look at the unit until tomorrow. I believe they are just standard photoelectric smoke detectors.
Another conversation with the owner.. the problem is that it alarms when he opens the 1600 degree kiln door. Kiln is about 3 feet from the acoustical drop ceiling and the sensor is almost directly above the kiln.
Click to expand...

Most brands have heat detectors that will be compatible with the smoke alarms. I'd probably move that puppy towards the other side of the room too.
 
mjf said:
sensor was actually in the center of the room and was the ionic type, changed it to a photoelectric, vacuum and new batteries in all the other units.....and away we go!


Thanks for the replies
Click to expand...

I'm not sure if the ion vs. photo in this case has anything to do with it. With the kiln being that close the device could haven been fatigued by the long term effects of the heat. It was probably just ready to be replaced.

When they open the kiln is there dust or something else emitted, besides heat?


How old was that smoke anyway?
 
good so far

good so far

the detector was, and is, actually about 10 feet away from the kiln, not directly above it as I previously posted.

to answer your questions...

Some areas of the shop do create a decent amount of dust (even with the filtration system), but the kiln does not....it does emit a bit of smoke as he takes his product out and puts a torch to it for a moment or 2.

the existing units are all about 6 years old....supposed to be good for 10.

it's been a few weeks and all has been well.

thanks again for the replies
 
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