Re: Strange Fire Alarm Activity

["jewellfish" <jewellfish@xxxxxxxxx>]

So, let me understand,

You laid wire on the floor, ran it into the gym, connected an EOLR and
the zone didn't trip.

You connect the same wire to pulls and the zone trips.  Only at night
(between midnight and 1 am).  Hmmm....

Did you try connecting just 1 of the pulls to isolate which pull might
be the prob?

I will assume you have been very thorough and are absolutley sure there
are no other devices connected on this loop, no T-tapping, ect...

A convential pull is nothing more than a N.O. switch, which is no more
than a piece of wire, so it shouldn't be affected by high freq energy
sources....

Try hooking up the pulls outside the wall ( on the floor?) and see what
happens.

Zone each pull seperatly, temporarily, to see which one trips?

If one of the pulls is in the basement or on a cold exterior wall, make
sure there is no moisture condensation dripping into the pull to cause
shorts.


Good luck


Jewellfish


Just Some Guy wrote:
> Since it is an old school, does it have a clock system?  Often the old
> clocks syncronize at some ungodly hour.  Perhaps the sync pulses are setting
> it off?  Perhaps the fire alarm wire is run in the same conduit, not unusual
> for the old systems where everything was 120 VAC.
>
>
> "Matthew Stanley" <armorsecsys@xxxxxxxxxxx> wrote in message
> news:hz3ch.67$V77.34@xxxxxxxxxxxxxxx
> > the only two devices are pull stations. I have replaced them with new
> > ones, I have ran a new 16/2 fire wire to the devices that ran from the
> > FACP  on the floors through the hallways to the gym... Still does it... Im
> > going to try going there when it happens at night time to see what
> > happens..
> >
> > This building was built in 1890 and its very old... The boiler they dont
> > use anymore, the system has new forced air heaters installed.. No A/C
> > units.....
> >
> > I will keep everyone on here posted on what happens... I hope I get this
> > taken care of cause its just making me go crazy...... (They say the
> > building is haunted but I dont buy that crap)
> >
> >
> > Matthew
> >
> >
> >
> >
> >
> > "Bob Worthy" <securinc@xxxxxxxxxxxxx> wrote in message
> > news:iJ1ch.21463$Q7.11624@xxxxxxxxxxxxxxxxxxxxxxxxx
> >>
> >> "Matthew Stanley" <armorsecsys@xxxxxxxxxxx> wrote in message
> >> news:zb1ch.202$PY.82@xxxxxxxxxxxxxxx
> >>> I think I forgot to mention.. This only happens 1 time between Midnight
> >> and
> >>> 1 am
> >>> each night
> >>>
> >>> Matthew
> >>>
> >> Have you made a visit to the site at that time? Is the wiring in conduit
> >> or
> >> is it free run. Something is happening at that time to effect the system
> >> and/or the resistance on the wire. Pumps turning on (surge), boiler pipes
> >> heating up, generator tests, etc. Something may become very obvious to
> >> you
> >> if you are there during these times. Set up a temporary wire to those
> >> devices at lets say 11.30 at night so that it doesn't effect JQ public.
> >> Let
> >> it go through those devices between the times you have narrowed it down
> >> to.
> >> That way the exiting wire is eliminated from the system. It seems you
> >> have
> >> eliminated the other obvious possibilities. Are there different makes and
> >> models of equipment on the same zone? It seems that you are right on the
> >> edge of the resistance tolerance and the slightest difference will put it
> >> over the top.
> >>
> >>
> >
> >