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CowboyAndy 02-19-2008 06:53 AM

Interconnected smokes
 
We currently have a fully interconnected smoke system with a total of 6 detectors total. I would like to change 2 of them to combo Co2 units. Are all hard wired smokes and Co2 interchangable? If not, how do I know if they are?

ElectricianJeff 02-19-2008 07:03 AM

Quote:

Originally Posted by CowboyAndy (Post 99286)
We currently have a fully interconnected smoke system with a total of 6 detectors total. I would like to change 2 of them to combo Co2 units. Are all hard wired smokes and Co2 interchangable? If not, how do I know if they are?

If the smokes are near 10 years or older than your best to replace them all. Smokes and Combo's are interchangeable but you need to stay with the same brand, lot#, etc.

Jeff

CowboyAndy 02-19-2008 07:13 AM

Well, they were kind of added as we remodeled, but I would say the oldest is only 2 years old or so, the newest about 6 months old. I would rather not replace all of them, but I guess worst case scenerio is I can't fint a combo unit from the same manufactorer and replace them all. I believe they are Kiddie brand from HD.

ElectricianJeff 02-19-2008 07:53 AM

Quote:

Originally Posted by CowboyAndy (Post 99290)
Well, they were kind of added as we remodeled, but I would say the oldest is only 2 years old or so, the newest about 6 months old. I would rather not replace all of them, but I guess worst case scenerio is I can't fint a combo unit from the same manufactorer and replace them all. I believe they are Kiddie brand from HD.

Kidde makes a combo unit, try a couple of them and you will probably be good to go.

Jeff

CowboyAndy 02-20-2008 09:20 AM

Is there a way to know for sure they are interchangable before buying them? Is this something they should say on the package?

radon 02-20-2008 12:00 PM

I don't know about lot numbers, but I just wired my rehab project with brand K smoke and combo detectors. I have two CO/smoke detectors mixed in with about 6 smoke detectors. They communicate nicely. They're wired together like 3-way switches... with 12-3 wire. You've got two for power and one for signal. I don't know exactly how the detectors use that signal wire, but I would think it would be fairly generic. Over a certain voltage means a unit has detected a fire! Alarm!

Anyway, it's something you could easily try. If the unit you buy doesn't communicate with the others, return it... try again. I think if you hold down the test button long enough it will set off the others, right? If not, fog one of them with enough lysol to set it off :)

CowboyAndy 02-20-2008 12:03 PM

Quote:

Originally Posted by radon (Post 99716)
I don't know about lot numbers, but I just wired my rehab project with brand K smoke and combo detectors. I have two CO/smoke detectors mixed in with about 6 smoke detectors. They communicate nicely. They're wired together like 3-way switches... with 12-3 wire. You've got two for power and one for signal. I don't know exactly how the detectors use that signal wire, but I would think it would be fairly generic. Over a certain voltage means a unit has detected a fire! Alarm!

Anyway, it's something you could easily try. If the unit you buy doesn't communicate with the others, return it... try again. I think if you hold down the test button long enough it will set off the others, right? If not, fog one of them with enough lysol to set it off :)


Okay, I think I will pick up just one this weekend when I go to Lowes, and if it works then I will pick up more next time I am out there.

Thanks.


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