My brand new hardwired kidde is sounding fire when I turn the circuit breaker on and doesn’t stop when I puts the middle button

Wires are crossed check all 6.

Mike

been there had that this should help!
https://www.kidde.com/home-safety/en/us/support/help-center/browse-articles/articles/what_to_do_if_you_have_a_nuisance_or_false_alarm.aspx
hope this helps you did me.

get the electrician back as there is a problem in the wiring and installation

I think it could be one of three things.
The electrician may not have installed the back-up batteries.
The electrician may not have turned the primary power to the detector circuit on when he completed the work and now the battery is depleted.
The electrician may have tied the the detectors into a switched circuit which does not apply constant primary voltage.

Hopefully you can contact the installer to troubleshoot his work.

Make sure to only use a brand name alkaline 9 volt battery. Don't use a used battery or a dollar store battery (bargain store). Then press the test button for 10 seconds to reset this unit and any more down the line.

You can do it yourself.
Anybody that knows 'hardwired' and observed timer is making humming sound can wire up a timer.
If M88T timer dial is not rotating, but power pack is making humming sound, then that says timer is receiving power but clock motor has gone bad.
There are no replacement clock motors for power packs.
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

To wire a new timer:
Click circuit breakers until the humming sound turns off.
Turn breaker back on to confirm that humming sound is associated with that breaker.
Buy a tester at local hardware and ask them how to use it.
Tester will give you assurance that power is off when connecting new timer.

Outdoors: put down dry boards to stand on, never stand on bare soil or wet/damp surface, don't touch anything metal and don't hold metal screwdriver in mouth while working on electric circuit. Wear gloves if you want. And don't sweat.
With 120volt circuit, as long as you are not grounded, which means that you are not touching soil, or anything that grounds back to soil, then you will not get electrocuted. You can get shocked only if power is still turned on at circuit breaker, and it will be surprising, but it won't kill you as long as you're not grounded. All electricity goes back into the earth to complete circuit.

Open the box where timer is hardwired.
Use tester on black wire. To confirm power is off.
Typical 120volt circuit: Black wire is Hot and carries voltage. White wire is neutral and completes the circuit back to ground. Bare copper wire is ground and serves as redundant safety.

Old 88T timer will be wired black-to-black, white-to-white, and green-to-bare copper.
Take photo of wiring to avoid confusion. Post photo on flickr and add a comment with link to photo for another pair of eyes on situation.
Cut off end of new timer wire, strip insulation with knife and attach wires same way previous timer was connected.
http://waterheatertimer.org/How-to-twist-electric-wire.html

To install ordinary 120Volt outlet so timer can plug in: Buy outlet from hardware: Black hot wire connects to brass-colored screw, white neutral wire connects to silver-colored screw, bare ground wire connects to green-colored screw.

Open following link to see basic circuits:
http://waterheatertimer.org/B220C.html
http://waterheatertimer.org/See-inside-main-breaker-box.html

Don't know for sure, but if your smoke detector is more than 5 years old, than you have to purchase new one (that's their average lifetime). Take a look on amazon: Amazon com smoke alarm . I hope I have helped. Cheers

smoke detectors work by smelling the air across a radioactive anode which upsets the electronics and sets off the alarm
it can be set off not only by smoke but by heat and gasses in the air
the new and better product is a photo electric detector which alerts earlier and can be installed connected to each room and into the house power or they come with a 10 years lithium battery
It could be a faulty unit so take it back for a warranty exchange unit

Replaced another battery,brand new battery a must,press the test button,by letting it goes off like 30 or 40 sec. so it will detecting the new power of the battery.The chirping,will stop.

The 3 beeps, known as temporal pulse, is indicative of an alarm condition. If it stops without a battery, then the unit either does not have power or is otherwise defective.