WTF is this or I don’t recognise this unit

[HandyMann]

Hi folks, some identification help required.
Customer has helpfully lost the alarm but has retained the base plate.
She thinks this was interlinked with some Kidde Firex smoke and heat alarms still in situ elsewhere in the house.
I’ve not got wander lead out yet to see if the interlink exists.
Anyone recognise the baseplate/ connector? Or have an idea why there are two neutrals (maybe)?
Any help much appreciated.

 

[Deleted member 9648]

They are old alarms,an Aico older design possibly. Replace.

 

[suffolkspark]

Definately Aico, im pretty sure that range was discontinued though so just fit new aico and new base

 

[westward10]

Ei150 series now obsolete.

 

[HandyMann]

Thanks guys. What’s the two neutrals all about?

 

[westward10]

If you remove those two screws you will see the mains terminal block where the cables connect. I cannot remember how those four wires connect to it.

 

[Toneyz]

If you remove those two screws you will see the mains terminal block where the cables connect. I cannot remember how those four wires connect to it.

Terminal block inside the surface pattress the two blue cables are joined together.

 

[HandyMann]

Cheers all.

 

[freddo]

The 2 neutral wires connect the internal battery when the plug is connected.