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#173167 01/04/08 06:40 AM
Joined: Jun 2004
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I am currently installing CO detection in MA in hotels and I am using one of the technical options of which I am using technical option F. I have been using a CM15a co detector manufactured by 3M and I was informed that this would not meet the requirement of the technical option F as the activating point is not 50 PPM. Does anyone know of a UL approved CO detector that is 24v wall mount with a NO/NC contact that will activate at 50 parts per million.

Joined: Nov 2007
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shortcircuit,
Have you looked into possible use of the 3M/Macurca CM-1B? May be able to latch at 35PPM/TWA.
If they are going to be installed in areas like boiler and laundry rooms to provide OSHA exposure time protection for workers, maybe they would work for you. Probably not adequate for public areas though. Seems that most everything else is 70PPM.

KJay #173180 01/04/08 12:33 PM
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Scratch that CM-1B. After closer review of the
spec sheet, it's clear that it won't be of any use in your installation.

KJay #173199 01/04/08 09:21 PM
Joined: Aug 2007
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What code are you looking at, in the NFPA, Mass, And local?

are these for occupant protection? or for equipment shuyt down?

Expand a little. I'm haveing trouble putting it all together.

Lee

leland #173201 01/04/08 09:28 PM
Joined: Aug 2001
Posts: 459
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Most of the TLV values for carbon monoxide are lower that 50 PPM.

You can see them here.
http://www.osha.gov/SLTC/healthguidelines/carbonmonoxide/recognition.html

Joined: Jun 2004
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Massachusetts Carbon Monoxide Rules...

527 CMR 31.00 section 31.05 f

The job is in Hotels


Joined: Aug 2007
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L
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Massachusetts Carbon Monoxide Rules...

527 CMR 31.00 section 31.05 f


For the others: This rule is for roof mounted fossil fuel burning equipment.
This state has gotten quite stringent with CO regulations.

Short, Ive not had to deal with this yet.You may need to go to the Alarm supplier as oposed to the elec house.

Keep us posted, and I'l keep my ears open.

Joined: Nov 2007
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shortcircuit,
I've posted your question to a couple of fire alarm forum sites.
Hopefully, someone there will have an answer. I have looked every where myself, but so far can't find anything in the U.S. that will latch at 50 PPM. Not even finding 4/20 transducer models that can be set that low. Seems to be some European stuff that will, but of no use to us here.
Since I also live in MA, I may run into this same situation, so it would be good if someone had an answer. Leave it MA to require something that may not even exist.
Please post back if you find something.
TKX

KJay #173230 01/05/08 07:36 PM
Joined: Aug 2007
Posts: 853
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Leave it MA to require something that may not even exist.--



Ya, Does battery back up heat detectors ring a bell?
(around '95)
Or the talking CO det with aux contacts for shut down? We had to use custom devices there for a while.

Required. But not in production at the time.

Last edited by leland; 01/05/08 07:37 PM.
leland #173605 01/14/08 03:05 PM
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Well, after ten days the only response I got from one of the alarm sites that I posted this question on was to "contact 3M/Macurca, because they do this kind of thing all the time."
So, I guess, if you haven’t already tried them, maybe they can help.

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