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Question About Firex Smoke Alarm 120-538B
what causes all 120-538B alarms to sound off simul...

what causes all 120-538B alarms to sound off simultaniously? killing power at the circuit breaker box does not shut them off. removing one device from the circuit will silence all of the alarms.

Asked by Tom on 12/04/2011 0  Answer

ManualsOnline posted an answer 12 years, 12 months ago

The ManualsOnline team has found the manual for this product! We hope it helps solve your problem. Get the Manual Here

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