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06-05-2019, 11:44 AM
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#1
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Junior Member
Join Date: May 2019
Location: Portland
Posts: 20
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Detectors
I’m confused about my carbon monoxide and fire detectors. I’m told if my 12v battery goes low, it can set off the alarms. When I disconnect and remove my battery to store RV in winter, won’t that set off alarms?
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06-05-2019, 12:12 PM
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#2
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,235
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Your smoke alarm (fire) is most likely powered by a 9V battery inside it. You should replace it each spring.
The carbon monoxide/ propane detector is powered by the coach’s 12V system. If you disconnect the power, then the detector isn’t being powered and can’t go off. Some brands of propane detectors will beep at low voltage (11.3VDC).
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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06-05-2019, 12:16 PM
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#3
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Senior Member
Join Date: Oct 2017
Location: Brisbane Australia
Posts: 708
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As I understand it, the CO sensor works off the 12V system. The smoke detectors operate from an internal 9V battery and possibly the 120V AC. When I winterized my rig, I pulled the 9V battery from the smoke detector and I disconnected my 12V battery completely.
I do know that when the 12V battery goes flat, or after it has been disconnected, it takes a few minutes for the CO detector to come back online. But without power, neither of the sensors will trigger.
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06-05-2019, 05:36 PM
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#4
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Junior Member
Join Date: May 2019
Location: Portland
Posts: 20
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Thank you for clearing that up. I do have a battery disconnect but I’m hearing some people say, even if I use that, the carbon monoxide detector isn’t disconnected and will slowly drain the battery and then alert. Is that how you understand disconnects also?
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06-05-2019, 06:03 PM
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#5
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Site Team
Join Date: Mar 2011
Location: Gaylord
Posts: 26,841
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Quote:
Originally Posted by Hshorten1
Thank you for clearing that up. I do have a battery disconnect but I’m hearing some people say, even if I use that, the carbon monoxide detector isn’t disconnected and will slowly drain the battery and then alert. Is that how you understand disconnects also?
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The safety devices that are connected to the battery are NOT disconnected with the battery cutoff switch (as wired from the factory). Their purpose is to protect you, even in the event you attempt to bypass them. While we could "argue the virtues of that decision" all we'd do is waste our breath. The factory wires them to remain powered unless the battery is entirely removed from the circuit, so with the factory wiring, the only way to disconnect the LPG monitor and the CO monitor is to disconnect the battery terminals. Some owners have added a second battery cutoff switch or rewired the existing switch so it accomplishes the same thing, complete removal of the battery from the system.
__________________
John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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06-05-2019, 06:09 PM
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#6
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,235
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The alarm won’t “alert” as the battery goes dead, it will chirp until it runs out of power.
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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06-05-2019, 06:30 PM
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#7
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Senior Member
Join Date: Dec 2017
Location: Lisbon
Posts: 551
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You really need to look at your particular setup as far as the detectors go. I have a 2018 Cougar 22RBS trailer and the smoke detector and CO detector are both powered by their own 9 volt battery. The propane leak detector is powered by the 12 volt system and it does get disconnected by my battery disconnect switch.
__________________
2018 Keystone Cougar 22RBS
2020 Ford F-350 XLT SC SRW 6.7l Powerstroke.
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06-05-2019, 06:45 PM
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#8
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Junior Member
Join Date: May 2019
Location: Portland
Posts: 20
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Thank you all for the information.
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