Testing signals on a 4100ES system in a school following replacement of a 4009 NAC Panel as well as a few other modifications. Original system in the high school was a 4100+ recently outfitted with an ES upgrade kit following an expansion a few years ago.
Follow me on Twitter & Instagram!
TWITTER: / safetech0415
INSTAGRAM: / officialsafetech
Негізгі бет Ғылым және технология Fire Alarm Test #45
Пікірлер: 263