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120V AC/DC Wire-in Smoke Alarm
Battery Backup
Part Number 21006378
– Ionization Sensing Technology
– One button design (operates Smart Hush™ and test)
– Large mounting base
– 9V Battery Backup (included)
– Tamper resist feature
– Alarm memory
– Pre-stripped wiring harness with tinned strands
Description
The Kidde i12040 is an AC/DC powered, ionization
smoke alarm that operates on a 120V power source
with 9V battery backup.
This alarm uses ionization sensing technology. Ionization
sensing alarms may detect invisible fire particles
(associated with flaming fires) sooner than photoelectric
alarms. Photoelectric sensing alarms may detect visible
particles (associated with smoldering fires) sooner than
ionization alarms.
Kidde strongly recommends that both ionization
and photoelectric smoke alarms be installed to help
insure maximum detection of the various types of
fire that can occur within the home.
This smoke alarm is available in a 6-piece cut case with
tray for easy display as well as a 6-piece bulk pack for
contractors and property owners. This unit is a UL Listed
product with a 10-year limited warranty.
Model i12040
Install Confidence
Easy Installation
• Front battery pull tab allows battery activation without
removing alarm from mounting bracket.
• Large mounting base makes mounting easier, protects
surface paint from dirt and covers imperfections.
• Pre-stripped wiring harness with easy off cap does not
require stripper tool. Tinned strands increase
conductivity and wire nut grip.
Fewer Callbacks
• One button design for easy operation and less
confusion. Operates Smart Hush™ and alarm test
• Battery run down protection will shut down alarm
memory when AC power is not present, reducing
low battery chirp.
• Dust cover protects sensor from contaminates during
construction reducing nuisance alarms
User-Friendly Features
• Tamper resist locking feature deters alarm theft
• Alarm memory flashes red LED indicating which unit
was the initiating alarm in interconnected system.
SIGNALING
• Interconnectable with up to 24 devices (of which 18
U L
can be initiating) including smoke, CO and heat alarms.
See user's guide for complete instructions.
LISTED
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Related Manuals for Kidde I12040
Summary of Contents for Kidde I12040
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Page 1: Battery Backup
– Tamper resist feature – Alarm memory – Pre-stripped wiring harness with tinned strands Description The Kidde i12040 is an AC/DC powered, ionization smoke alarm that operates on a 120V power source with 9V battery backup. This alarm uses ionization sensing technology. Ionization... -
Page 2: Part Number
120V AC/DC Wire-in Smoke Alarm Battery Backup Architectural and Engineering Specifications The smoke alarm shall be Kidde model i12040 or approved equal. It shall be powered by a 120VAC, 60Hz source along with a 9V battery backup. The unit shall incorporate an ionization sensor with nominal sensitivity of .50 to .98%ft. The temperature operation range shall be between 40˚F and 100˚F (4˚C and 38˚C) and the humidity operating range shall be 5% - 95% relative humidity.
Need help?
Do you have a question about the I12040 and is the answer not in the manual?
Questions and answers
Can not get wires to disconnect from pod. How do I remove wires from pod to open battery door?
To remove the wires from the pod of a Kidde i12040 smoke alarm, squeeze the locking arms on the sides of the Quick Connector while pulling the connector away from the bottom of the alarm. After disconnecting the AC power harness, remove the alarm from the trim ring by rotating it in the direction of the "OFF" arrow. Once removed, you can open the battery door to install or replace the battery.
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Why does my 120v with battery back up keeps sounding Fire Fire when i loose electricity to the house
The Kidde i12040 smoke alarm does not sound an alarm during a power outage unless smoke is detected. It has a 9V battery backup to ensure continuous operation when AC power is not available. However, the alarm memory feature shuts down when AC power is lost to reduce low battery chirping.
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If i **** replacing a 1235 alarm with the newer model i2040A do I need a Ka-F wire adapter so that i don't have to reconnect wires
how many watts does a 120 volt smoke alarm use in standby mode. close is good enough. need to know for backup power calculation.
The Kidde i12040 smoke alarm operates on a 120V power source and consumes 80mA. To calculate the power consumption in watts:
Power (W) = Voltage (V) × Current (A)
Power = 120V × 0.080A = 9.6W
So, the Kidde i12040 smoke alarm uses 9.6 watts in standby mode.
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We have changed the battery in 2 alarms, yet they continue chirping. Light is green. Red does not flash. We hate reset it, changed the battery. It stopped for 2 days & started again. When we reset it stops & 2 hours later it starts chirping again. What is the issue??
The Kidde I12040 alarm may continue to chirp after changing the battery and resetting it due to several possible issues:
1. Battery Reminder Finger Not Held Down – If the battery is not correctly installed and does not press down the battery reminder finger, the battery door will not close properly, the AC quick connector will not attach, and the alarm will not function correctly.
2. Low Battery or Wrong Battery Type – The alarm requires a 9V battery, and only specific types (Carbon-zinc: EVEREADY 1222, GOLD PEAK 1604P or 1604S; Alkaline) should be used. If an incompatible or low battery is installed, the alarm may continue to chirp.
3. Residual Charge or Memory Issue – If the alarm continues to chirp, it may need a full reset. Try removing the battery and AC power, holding the test button for 15-30 seconds to discharge any residual charge, then reinstalling the battery and reconnecting power.
4. Dirty or Faulty Sensor – If dust or debris is inside the alarm, it may cause false chirping. Clean the alarm by wiping the exterior with a damp cloth and ensuring the air openings are clear.
5. End of Life – If the alarm is old, it may be at the end of its life cycle and require replacement.
If these steps do not resolve the issue, replacing the alarm may be necessary.
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