Hi,
Have a Honeywell burglar alarm unit thats been running fine for 6 months since installation( by me).
Now for some as yet unkonwn reason one input zone is being triggered by the central heating, though only once every other day or so. ( proven after some timed tests )
Assume some contact on some part of the central heating is causing the fault but it may take some time to isolate exactly what.
Annoyingly, switching the heating on and off manually via its controller many times does not replicate the fault
Until I find the root cause, was looking at tackling the problem is two ways, fitting suppressors to the stats etc and possibly an input filter to the alarm zone input.
Typically on the thermostats contacts a RC main voltage suppressor would be use, but wondered if using and/or a 250v MOV would be better ?
On the alarm zone, which is direct wired to 3 magnetic contacts at 13v dc wondered which would be best, the cable around a ferrite or again a small RC eg 1 M ohm /220nf or even a zener diode ?
thanks
Have a Honeywell burglar alarm unit thats been running fine for 6 months since installation( by me).
Now for some as yet unkonwn reason one input zone is being triggered by the central heating, though only once every other day or so. ( proven after some timed tests )
Assume some contact on some part of the central heating is causing the fault but it may take some time to isolate exactly what.
Annoyingly, switching the heating on and off manually via its controller many times does not replicate the fault
Until I find the root cause, was looking at tackling the problem is two ways, fitting suppressors to the stats etc and possibly an input filter to the alarm zone input.
Typically on the thermostats contacts a RC main voltage suppressor would be use, but wondered if using and/or a 250v MOV would be better ?
On the alarm zone, which is direct wired to 3 magnetic contacts at 13v dc wondered which would be best, the cable around a ferrite or again a small RC eg 1 M ohm /220nf or even a zener diode ?
thanks