How do I remove an old ADE Optima Compact home alarm?

[Bunford]

I have just purchased a new home and just moved in. It has an ADE Optima Compact box in the hallway with a small square electrical fuse box above it.

There are sensors in the corners of various rooms, a couple of door sensors, as well as a red siren box on the front and rear of the house

I want to completely remove this as the previous occupiers did not use it as it was installed before their time, and therefore they have no idea what the codes are and so on.

How can I remove this alarm system, sensors, and sirens as easily, and ideally as noise free as possible?

This is the control unit in the hallway:

This is the CU:

 

[Wayners]

Cut a hole in the front of plastic box and cut siren wire.
Do the same with outside alarm box.
Do what you want then with no noise.

If it's working the proper way is to put the engineers code in. Can sometimes find that online.

If all else fails but ear defenders on and rip it out

 

[secureiam]

better to default it and reuse can find manuals online.

looks like its already isolated and ready to remove as is.

no leds at panel and the consumer unit switched off, I would take the fuse out of the spur also.

The issue here is the spur has a mains cable running back to the consumer unit, you can easily remove the spur from the fuse box to the panel but from the fused box to the consumer unit may be a little more involved.