Bracket Mounts to any Standard Wiring Junction Box
Replaces the now obsolete USI-7795 and CD-9795 Wired-In 120 Volt Combo Smoke & CO Alarm
Ideal for Homes, Apartments and Mobile Homes
Conforms to UL2034, UL217 and UL 1484 Standards
California State Fire Marshal Approved
7 Year Limited Warranty
The USI Electric MICN109 Hardwired Ionization, Carbon Monoxide and Natural Gas Alarm is a 3-in-1 device that provides triple the protection with a single installation. This alarm protects against (3) deadly household threats: fast-flaming fires, carbon monoxide and natural gas (or methane). Perfect for new or replacement installations, the 120-volt AC/DC hardwired alarm is suitable for houses, apartments and mobile homes. Advanced smoke recognition gives the MICN109 a faster response time to smoldering fires when compared to conventional smoke alarms. Auto sensitivity calibration provides superior nuisance alarm protection and creates consistency in alarm sensitivity.
This alarm has additional automatic features including a self-diagnostics check and a sensitivity adjustment for changes in temperature or humidity. The 9-volt alkaline battery (included) continues protection in the event of a power outage. This alarm features a front-loading battery drawer for replacement without removing the alarm from the bracket. Mount the bracket to any standard wiring junction box and use the large mounting base to cover imperfections in drywall. The plastic dust cover protects the alarm and (2) tamper-resistant locks prevent unwanted alarm or battery removal. For maximum protection, install an alarm inside every bedroom, outside every sleeping area and on all levels of the dwelling. The USI Electric MICN109 Hardwired Ionization, Carbon Monoxide and Natural Gas Alarm comes with a 7 year limited warranty.
This USI Alarm replaces the now obsolete USI-7795 and CD-9795 Wired-In 120 Volt Combo Smoke & CO Alarm (this model also utilizes the same mounting bracket and wiring.)
Warranty: 7 year Limited Warranty
Alarm Power Source: 120 volt hardwired & 9 volt battery backup
Q: WHY DOES MY SMOKE ALARM 'CHIRP' APPROXIMATELY ONCE EVERY MINUTE?
A: The smoke alarm chirps to indicate a "low battery" condition, meaning the battery needs to be replaced. Battery powered smoke alarms will chirp a minimum of 30 days before the battery completely loses power.
AC powered smoke alarms with battery backup will chirp indefinitely assuming AC power is present; if battery power is low, or battery is removed; until a fresh battery is installed. Approved replacement batteries are listed on the back of each smoke alarm and in the user's manual.
Certain model smoke alarms with a silence button (designed to silence the alarm during a nuisance alarm) may chirp to indicate the smoke alarm is in the silence mode. The chirp will stop after approximately 8 minutes and the smoke alarm will return to its normal operation.
Q: WHAT LEVELS (PPM) OF CARBON MONOXIDE CAUSE AN ALARM?
A: Carbon monoxide alarms are designed to alarm before the average healthy adult feels symptoms. Since you cannot see or smell CO, never assume it's not present. Underwriters Laboratories Inc. Standard UL2034 requires residential CO alarms to sound when exposure times and exposure levels of CO in the chart below. CO alarm levels are measured in parts per million (ppm) of CO over time (in minutes). The UL2034 Required Alarm Points are:
If the Alarm is exposed to 400 ppm of CO, it must alarm between 4 and 15 minutes.
If the Alarm is exposed to 150 ppm of CO, it must alarm between 10 and 50 minutes.
If the Alarm is exposed to 70 ppm of CO, it must alarm between 60 and 240 minutes.
Q: IS CARBON MONOXIDE HEAVIER THAN AIR?
A: Carbon monoxide is not heavier than air. A carbon monoxide alarm should be installed in a location where the alarm will stay clean, and out of the way of children or pets. Refer to the user's manual for specific installation requirements.
Q: WHAT DOES IT MEAN WHEN THE RED LIGHT ON THE ALARM FLASHES APPROXIMATELY ONCE EVERY MINUTE?
A: The flashing red light gives a visual indication that the smoke detector is functioning properly. It also indicates a working battery is connected to the smoke alarm.
Q: WHERE SHOULD I INSTALL MY CARBON MONOXIDE ALARMS?
A: It is very important to install a carbon monoxide alarm outside each separate sleeping area, and for maximum protection, install one in every bedroom. Many states now require installation of a carbon monoxide alarm inside each bedroom. For added protection, placement of an additional carbon monoxide alarm at least 15-20 feet away from the furnace or fuel burning heat sources is recommended. Install carbon monoxide alarms a minimum of 10 feet from sources of humidity like bathrooms and showers. In multiple-story dwellings, install one carbon monoxide alarm on every level. If you have a basement, install a carbon monoxide alarm at the top of the basement stairs, and in each separate sleeping area.
Q: WHAT AREAS SHOULD I AVOID INSTALLATION OF A CARBON MONOXIDE ALARM?
A: Do not install carbon monoxide alarms in garages, kitchens, furnace rooms, or in any extremely dusty, dirty, humid, or greasy areas. Do not install alarms in direct sunlight, or areas subjected to temperature extremes. These areas include unconditioned crawl spaces, unfinished attics, un-insulated or poorly insulated ceilings, and porches. Carbon monoxide alarms should not be installed in outlets covered by curtains, heavy furniture or other obstructions. Do not install in turbulent air-near ceiling fans, heat vents, air conditioners, fresh air returns, or open windows. Blowing air may prevent carbon monoxide from reaching the CO sensors.
Q: WHAT DOES THE CONTINUOUS GREEN LIGHT ON MY SMOKE ALARM INDICATE?
A: When a green light is present on your smoke detector, it means that AC power is currently operating the alarm.
Q: THE GREEN LIGHT ON MY SMOKE ALARM HAS GONE OUT, WHAT DOES THIS MEAN?
A: If the green light on your smoke detector is not on, it means the AC power has been interrupted to the alarm. Check the circuit breaker and AC wiring to make sure power is still reaching the smoke alarm.
Q: HOW CAN I TELL WHICH SMOKE ALARM IN A MULTI-STATION SYSTEM INITIATED THE ALARM?
A: When interconnected alarms are alarming, the smoke alarm which initiated the alarm, either by test button or sensing smoke, will flash the red LED light approximately once per second. The red LED light on the other non-initiated interconnected smoke detectors will not be lit but will sound the alarm.
Q: HOW MANY SMOKE ALARMS OR DEVICES CAN BE INTERCONNECT AT ONE TIME?
A: The NFPA 72 standard states the interconnect limit is 12 smoke alarms and up to 6 other alarms (heat alarms or carbon monoxide detectors) for a total of 18 total alarms. With 18 alarms interconnected, up to an additional 6 relay modules may be interconnected (for a maximum of 24 devices).
If battery backup alarms and non-battery backup alarms and accessories are mixed in an interconnect system, all devices without battery backup WILL NOT operate during an AC power failure.
CAUTION: USI alarms and accessories should only be interconnected with other USI alarms and accessories. Connecting devices from another manufacturer to USI devices may result in nuisance alarms, failure to alarm, or damage to one or all of the devices in the interconnect system. All interconnected USI alarms should be powered by the same fuse or circuit breaker. Smoke alarms shall not receive their power from a circuit that is protected by a ground fault circuit interrupter. Improper connection will result in damage to the alarm, failure to operate, or a shock hazard.
USI Electric Hardwired 3-in-1 Smoke, CO and Natural Gas Alarm (MICN109) Video
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USI Electric Hardwired 3-in-1 Smoke, CO and Natural Gas Alarm (MICN109) Reviews
Reviewed: 02/12/2018 by Edward Stout
Awesome company got my items needed in a expedient fashion!
Reviewed: 02/02/2018 by Richard Gwizdala
Good product great service
Reviewed: 01/17/2018 by James Rushing
On time and works. All you can ask for.
Reviewed: 01/10/2018 by David McCrary
The customer service person that helped me was so kind as to help me find the replacement product that I needed and when I received it, it was correct and it already had batteries inserted. This is usually not the norm.
Thank you for the great service on a simple order.
Reviewed: 01/09/2018 by Robert Peterson
Replaced oem. Works well
Just What was Needed
Reviewed: 12/13/2017 by Nancy Miller
Our old smoke alarm kept chirping, even after multiple fresh batteries. Ordered a replacement easy to install. No more birdies!
Reviewed: 12/13/2017 by Betty Holland
They are very easy to install. We have a small home but it is very important to us. We have four regular fire alarms that are connected for safety.
We appreciate your help and speedy shipping of these items.
Easy to install
Reviewed: 09/19/2017 by Courtney Sheffert
Was easy to install replacing our old unit that was no longer working.
Reviewed: 08/30/2017 by Emily Dickens
Happy it worked although it was a little difficult to get it to fit in.
Exactly what we needed!
Reviewed: 08/28/2017 by barbara smith
We had a smoke detector go bad, found this online, and got it delivered immediately, a perfect match!
USI Electric Hardwired 3-in-1 Smoke, Carbon Monoxide and Natural Gas Alarm
Reviewed: 06/16/2017 by ronnie taborn
Quick turn around
Reviewed: 05/31/2017 by Don Rahaim
My multi-sensor device had failed. I went online and ordered the replacement and received it within a week. The device replacement was easy and a great deal more economical than what my security monitoring service quoted me. Great product and even greater service.
Reviewed: 05/15/2017 by Carl
Replaced two smoke detectors with these units to make our home CA compliant for CO and CO2 detection . Items were shipped quickly and function perfectly.
Reviewed: 04/03/2017 by Leslie Blake
Delivered in a timely manner and was easy to install.
Reviewed: 02/12/2017 by Achenkunju Chandy
Very good. I am happy
works as expected
Reviewed: 01/14/2017 by Helmuth Ludwig
Product arrived as promised and works as expected
Reviewed: 01/12/2017 by Elizabeth Haydon
Super product and fast shipping and delivery.
Good service and product
Reviewed: 01/02/2017 by abrahams
Perfect match to the old model that I replaced. The service is excellent.
Reviewed: 12/02/2016 by Linda SCOVILLE
easy to install-working well so far
Reviewed: 11/07/2016 by Ilaina Edison
Excellent product, easy to install and reasonably priced.
Fast installation, spent more time dealing with the ladder
Reviewed: 10/14/2016 by James Capelle
This was a replacement for a very old model that lasted over 10 years. Just had to change out the mounting plate and the wiring connection matched the older model and this was installed in 15 minutes. Add another 6 minutes to installation, I had to go get and later return the ladder.
Reviewed: 09/29/2016 by Walfred Pelto
I have ordered and used these 3 in one smoke, carbon monoxide and natural gas detectors for several months now. They have replaced the need for 2 other detectors. Plus added protection with detecting natural gas. It's a win win. Thank you they are easy to mount you just plug them into your old smoke detector and you are finished.
Reviewed: 09/13/2016 by John Komer
Hoping this new model will work longer than the previous model. So far so good.
Reviewed: 08/10/2016 by Raymond Allen
The unit came and was able to replace the one that went bad.
Reviewed: 07/17/2016 by Robert Fritz
the product was ordered one day and arrived the very next day. Easy replacement for earlier models which had stopped working. My concern was the earlier models had a life of 5 - 7 years and they stopped working before the fourth year was over. I will call to discuss.
Reviewed: 07/16/2016 by Raymond Quesnel
Items arrived quickly, were extremely easy for me a veritable disaster as a handyman to install actually replace so no need for wiring. My experience is such I would have no problem recommending this company!
Reviewed: 07/07/2016 by Tracy Bishop
This model is a replacement for a previous model. The base that attaches to the ceiling is the same and was easy to pop the new detector in place.
Reviewed: 07/05/2016 by Roger Rigby
Reviewed: 07/04/2016 by rebecca wright
Reviewed: 06/22/2016 by CHARLES WALKER
thank you for your help and keeping up what you say
Reviewed: 06/22/2016 by Michael Marler
Works great so far with no false warnings. Easy to install.
Reviewed: 06/07/2016 by Sharleen Bailey
We needed a replacement for an older model and this was the recommended model. Fit the brackets perfectly, no need to have to replace everything, which was great for me!
Reviewed: 05/19/2016 by Robert Peterson
This is the second one I have purchased. Product works great. Great value!
Reviewed: 04/27/2016 by jonathan estabillo
VERY FAST SHIPPING. I ORDERED 2 AND LIKE IT VERY MUCH.
Right product for right application
Reviewed: 04/15/2016 by Glen Teason
We've used USI 3 in 1 alarms in our home for many years now. They actually came with our new home. They have never let us down and never fail to alarm if there is a valid reason to do so. We trust them and will keep buying them.
Right product for right application
Reviewed: 04/12/2016 by Glen Teason
We replaced our aging, older smoke and fire alarms with this new one, to ensure we had the latest technology and safety. Works perfect in our home system. Fully compatible.
Reviewed: 04/07/2016 by Shirley Deleon
Reviewed: 03/30/2016 by jonathan estabillo
working good and properly. Buying another one after this review.
great product and service
Reviewed: 03/28/2016 by Fahad Anees
Arrived on time and great service by them
Reviewed: 03/15/2016 by Madison Galbraith
My order came quickly and it works perfectly and it replaced my old one easily. Thanks
Smoke, Carbon Monoxide NG Alarm.
Reviewed: 02/17/2016 by John Lenski Jr
Very helpful customer service and quick delivery of the smoke alarms. Everything is setup and functioning as advertised.
Smoke, Carbon, gas alarm
Reviewed: 01/20/2016 by Jerome Karwoski
Great product and easy to install.
Reviewed: 01/19/2016 by Richard Abrams
Perfect fit for a replacement.
Reviewed: 01/04/2016 by phillip slimak
I wanted a plug and play replacement. This was ready out of the box and had CO and natural gas warning as well, something the old alarm did not offer. I am glad I brought an extra.
Reviewed: 12/30/2015 by Albert Scappaticci
Just remove old unit plug in new one!
Reviewed: 12/30/2015 by Cindy Armstrong
I was delighted that the new version fit my older versions mounting brackets with no adjustment at all. I now have a houseful of new detectors.
Replaced existing unit
Reviewed: 12/04/2015 by James P
I had an older version of this model which stopped working and would randomly chip.
Ordering the replacement was a breeze, and it was shipped on time. The unit was pretty much plug and play with no issues whatsoever. Recommend and would buy again hopefully not very soon.
Happy with service.
Reviewed: 12/04/2015 by Rodney Heining
Easy to install and it fit perfectly.
It Works Great
Reviewed: 11/30/2015 by John Uphues
Had no problems to replace a previous model with this updated version. Everything working as advertised.
USI Electric Hardwired 3-in-1
Reviewed: 11/20/2015 by Carlos Smith
Purchased a hardwired 3in1 alarm. Easy install works great so far. Seems to be a quality device.
Simple Install - Feel Protected
Reviewed: 11/19/2015 by Gary Gregory
Easy process for installation and now I feel like my family is better protected in our home. Everything works like a champ.
Reviewed: 10/21/2015 by Roger Long
Time to replace the 5-year-old alarms. These were perfect, brand-for-brand, with the added convenience of fitting the existing brackets!
Reviewed: 07/02/2015 by Cecilia Retirado
This product gives me peace of mind. I don't have to worry for any expired/old batteries.
Reviewed: 02/18/2015 by Elaine Twyman
works great!!! At first was concerned couldn't find one, but it worked great.