Re: Macurco CO detectors

["ABLE1" <royboynospam@xxxxxxxxxxxxx>]

<chasbo@xxxxxxxxx> wrote in message
news:26dd16ds5c3rotbfr644d4k31igb7dl0tj@xxxxxxxxxx
> Local distributor says Macurco no longer manufacturing CM-15A.  New
> unit is CM-E1.  I breezed through the manual at the distributor's
> counter looking for a reference to the snap-in battery on the PC
> board, found nothing about why it was there, its life span, voltage,
> or part number. Counter person was no help.
>
> What purpose does the battery serve, despite a reference to connecting
> it to a UL listed alarm panel, which would already have a battery
> backup?
>
> Does the battery get charged from the alarm panel's12-VDC?
>
> The unit is to be ceiling mounted or wall mounted according to the
> fine-print instructions, hence high up on the wall.
>
> I've always wall-mounted the CM-15A about 5' 10" above the floor, the
> height at which many of our noses are busy taking in air.
>
> In one house I used the 5' 10" height in hallways and other locations
> where there was "awake" activity, near all sleeping areas, and at a
> lower level INSIDE all the bedrooms adjacent to the bed, wall mounted
> between the bed and the bedroom door, in effect bringing the unit
> closer to their noses.  Though Massachusetts Building Code does not
> require the detectors to be placed within the bedrooms, this
> particular customer wanted one in each of six bedrooms.
>
> My understanding of CO is that when produced, it is from a hot source,
> thereby rising upwards, but as it cools it begins to drop, and mix
> further with the ambient air, and then can flow anywhere within the
> house predicated on the normal air flow patterns of the house. It
> therefore seems reasonable that the best height to mount is at the
> height of the air that we are about to breathe.
>
> To exaggerate, it would seem that the best place to mount a CO
> detector is on my nose, or as close as possible!


Macurco now owned by 3M in case you were wondering.