What a bitch trying to search for a commercial type CO detector. I need one
to replace a unit that is defective in a Condo Building we maintain. The two
that run the garage fans are made in Israel and con not locate any info on
them. Does anyone have any name brands that might come to mind?
a few years ago I had a job installing two such systems in an
underground parking garage. I used detectors made by these guys to
control the fans:
very easy to setup & calibrate....
Thanks go fish. I did locate that site, but will look into the model you
used. The other model I was looking at, seemed to use a controller board
with remote sensors. The two that are in the building now are 120v and are
in parallel to bring in a 120v contactor coil for the fans. The Macurco has
24v circuits. I guess the Assoc Board is going to have to dig deeper to get
the circuits rewired and isolated or change both. Guess we were just looking
for a replacement way out....but as life has it, it's no that simple anymore
my situation was that the existing 3 phase fans were controlled by a
fused disconnect, like a Square D 321 NRB. So they were on 24/7.
I installed a 12x12 j-box next to the disco and wired in a 208/24 xfmr
and 3 pole contactor which was controlled by the CO sensor. So yeah,
a few xtra bux but then again, they got a top shelf sensor.
This system has Gray Box with a 30 minute timer....so for 3 minutes each 1/2
hr the fans runs for 3 minutes and then if the CO goes above the set point
on the detectors the fans come and run until the detector gets below the
safe range. Fans ON....intakes also OPEN
One detector senses the north end of the garage and the other the south end
Looks like the unit needs 24 Vac or dc but will switch 5A on a dry
relay. More than enough for a contactor.
Use one of those "piggyback" 120 x 24 v transformers that'll mount to a
4x4 and you're good to go....
I'd talk them into using the alarm contacts too.
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