System Sensor 2W-B

It is an excellent smoke detector.

Jim Rojas

I hope so, I use a lot of them.

Me too...when I can't get Hochikis

Its a very good unit. You are better off with a two wire smoke. With a four wire you need to install a power supervision relay module to do it right. RW

Like others have said, good unit.

Remember though: Only one zone can be used for 2-wire smokes (Z1) so plan your wiring accordingly.

If he home runs 4c to each smoke, he can take care of the planning in the panel. In/out, In/out, etc. Service advantages, too.

If you are going to be using these in a residential setting I recommend that you go with the 2WTA-B.

The 2W-B does not have a sounder in it. In a residential fire you want as much noise as you can get.

I like the 2WTA-W (thermostat and sounder).

"alarman" wrote in news:Fmutl.83906$RJ7.82256 @newsfe18.iad:

I do too. if it's not a wireless install, chances are that it will be a 2wb or 4wb.

I use the thermos too...have a buddy that swears by the sounder option too...I've only used the sounder ones where I've needed them though.

I use them with a reversing relay (# RRS-MOD I think.) It triggers sounders on all smokes if any one trips.

dat be's code to have sounders in bedrooms, eh?

The 2W-B (2 wire) does not show up on the compatibility list for the Vista 20. You'll have to use the 4W and an EOL supervision relay. Only the following 2-wire smokes are compatible (see page 18 of your Vista 20 installation manual):

System Sensor 2300TB, 2400, 2400TH, 2451 w/ B401B Base, 2451TH w/ B401B Base, 1400, 1451 w B401B Base, 2451 w/ DH400 Base, 1451 w/ DH400 Base,

Use only UL approved compatible devices for connection to a listed panel. And the pro's here should really check their facts before opening their big yaps! :-)

thought they did that automajickly?

Indeed. dat be's.

Donno, never tried it without the relay. The smokes are designed to sound off if the polarity is reversed.