Hi, I have a Thorn Carbon monoxide fire detector, and I am trying to find
out how to wire the unit up. It has terminals R, L, L1 and L2 on the base.
It was the fire detector on an ADT intruder alarm, so it was fed 12 volts
and I presume when it detects CO it opens the zone loop and triggers the
alarm panel?

Many thaks to anyone who maybe able to help me, I have tried for a long
while nowonline to find it - with no joy.

Thank you

Alistair