My old elementary school had a Simplex System set to 20bpm like the third coding option in the video. It was a 2001-8001 that was changed out to a 4002, then a Simplex 4020.
The NACs must be pulling down the power inside the panel, causing the filter capacitor to drain to a level where it’s not regulating the rectifier very well.
Older building, older regulations. There is a few buildings around like this in my area. They can't really be forced to upgrade unless AHJ wants it done
its a regular speaker and for music. Most apartments have or had a speaker in front of the elevator playing music, most I see now a days are disconnected
My middle school had a Simplex 4002 in the office. The horns were 9838s on 4903-9101 strobe plates, all mounted on those simplex back boxes. The coding was set to the fourth one in this video, they always used the drill button.
@@MircomFan code 3 has a 2 second pause in between rounds. The “3-3” coding from simple coding is the panel sounding out zone 33. Now 4002s only go up to 32 zones so the 33rd zone is technically manual evac
