Monitored smoke detectors

BrettS

Active Member
My house came with an alarm system (a DSC PC1616), but none of the smoke detectors were wired to the alarm panel. The house has something like 7 smoke detectors (one in each bedroom, one on each end of the upstairs hall by the bedrooms, and one on each of the other floors). The builder said that they were all wired together such that if one goes off then they will all go off, but he didn't seem to know how they were actually tied together.

Unfortunately, nothing was pre-wierd for the alarm system, so if I can't re-use whatever they used to connect the existing smokes together then I'll either need to go wireless or run the wire myself. The vast majority of the smoke detectors are installed on the third floor and the alarm panel is also on the third floor, so I think think it'll be too much trouble to run those wires in the attic. The first and second floor ones, however, will be much more difficult.

So, here are my questions - should I really replace all 7 smoke detectors with monitored ones? I keep going back and forth on this one... if the house does catch on fire, then it seems like all of the detectors will be sensing smoke pretty quickly and if I only put in a few monitored ones - maybe one on each floor - I should be able to detect anything. On the other hand, there must be a reason that they put in 7 detectors, and obviously it would be best to catch a fire as soon as possible, so maybe they should all be monitoried.

Does anyone know how the existing smoke detectors are wired together? Would I be able to reuse that cable at all?

Finally, does each wired smoke detector require it's own zone? My panel suppots a maximum of 16 zones and I was really hoping to put each door and window on it's own seperate zone... so that alone will use something like 12 or 13 zones. If I need a seperate zone for each smoke detector, then I'm probably going to need to upgrade the panel as well.

Thanks much,
Brett
 
Those detectors are all tied together with the A/C wiring. It's pretty much the basic common method for builders smokes. You can accomplish what you want by simply replacing 1 of them with a model that has a relay. Whenever any of the 7 alarm, then the relay should trip alerting the panel (on 1 zone). I'd have to search to find it, but the one I remember seeing is a GE model.
 
Those detectors are all tied together with the A/C wiring. It's pretty much the basic common method for builders smokes. You can accomplish what you want by simply replacing 1 of them with a model that has a relay. Whenever any of the 7 alarm, then the relay should trip alerting the panel (on 1 zone). I'd have to search to find it, but the one I remember seeing is a GE model.

Steve, is this the GE detector you were thinking of? http://www.homecontrols.com/cgi-bin/main/c...larm-with-Relay

Is the company I have monitoring my alarm going to have a problem with this, or is this an accepted way to do it? If this is all I need, then I should have a really easy time connecting this, as one of the existing smoke detectors is within about 10 or 15 feet of the alarm panel... I can just replace that one with one of these and use a short cable run to connect the relay to one of the zones in the panel.

Thanks,
Brett
 
Back
Top