Strange Fire Alarm Activity

Matthew Stanley · 2006-12-01T15:11:25+00:00

Hey!I have a customer that bought an old school building in southern Missouri. I went to look at the burglar alarm system they had as well as the fire alarm panel.The burglar alarm panel was a DSC 3000. I took everything out and installed a Caddx NX8 Version 2 Panel. All new wiring, Motions, and siren.Total zones in the school building 43. 3 Partitions. At first, when I took the smaller NX8 system out of his old building to install in the school building, everything worked. I kept getting false alarm on the nx8, so I replaced the board... The second time I replaced it, the system kept auto arming. Tech support couldnt give me a reason. They walked me through it all and could not find the problem. I had to replace the board a second time. Since then everything has worked fine...Now here is the problem with the fire alarm panel.When I got to the school building, they had an old edwards panel from the 50's.. It was not in service. they just left the panel. It looking like all it was were fuses and knife switches. Beside that, they had a silent knight 5204. The system included 10 pull stations and 10 horns. The Control Panel (5204) was broke because some kinds came in and took a bat and smashed in the box. I replaced it with a silent knight 5207. Since the upgrade The fire alarm keeps going off for no reason. I went back to check the wiring. It was all replaced back in 2004 with 16/2 fire wire for the zones and 14/2 for the horns. Nice services loops on the wire, no ground faults, checked the loop resistance and all comes out fine. The pull stations are old Faraday "Strike to Break Glass" type.Now the only zone that goes off is zone 4. Zone 4 is the zone that services the gym and the shower rooms in the basement (Under the gym)The only devices on this zone are 2 pull stations. The gym also has 1 fire horn. (They dont even have a horn in the basement for the shower rooms)so this is what I did. I replaced the 2 pulls with newer edwards pull staitons. Still goes off. I...

Dec 01, 2006 21 Replies

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Petem 19 years ago

could it be a RF problem?

MAybe there is a transmitter that do a "system check" at fix time during the night and this coud interfer with the fire panel

you could use some ferrite at the pull station and at the panel..

"Matthew Stanley" a écrit dans le message de news: zb1ch.202$ snipped-for-privacy@newsfe06.lga...

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Petem 19 years ago

the switching of zone 4 to 1 that the OP did clear that possibility since he told us that the trouble followed to zone 1 so if it would have been a "ghost transmitter" the alarm would have still come from zone 4

"Beau Skeen" a écrit dans le message de news: snipped-for-privacy@l12g2000cwl.googlegroups.com...

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