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Ion Smokes

PostPosted: Wed Jun 12, 2013 4:12
by ali_baby
Hiya!!
I seem to remember somewhere in the codes and/or standards that ion smokes in a system need to be replaced after 10 years but I can't find it. Does anyone know where that would be or if I'm just being silly? It makes sense to replace them after a bit since the radioactive material will be depleted but my client wants the reference

Re: Ion Smokes

PostPosted: Wed Jun 12, 2013 8:11
by FIRETEK
The reference to replacing detectors every ten (10) years applies to unsupervised smoke ALARMS only. Supervised smoke detectors (whether ionization or photo-electric), are not mandated to be replaced. The half-life of Americium (the isotope used in most ionization detectors) is about 432.2 years.

You must test the sensitivity of supervised smoke detectors on an annual basis. If the detector involved is no longer being produced (or was manufactured more than twenty years ago), the likelihood of being able to source the appropriate tester is extremely remote. In this instance, I would recommend replacing the detector with a more modern unit (one that has a "self-test" feature like the System Sensor C2W). Please ensure that what you're installing is ULC cross-listed to the common control!

Re: Ion Smokes

PostPosted: Thu Jun 13, 2013 5:00
by ali_baby
Awesome. Thanks!!

Though I doubt there's anything cross listed with this