Bentley F133 Revisited.

[lancepar]

Hi,

The management want me to start a new thread on this old system, but no help as to where to start it, so If in wrong place stick it where it should be.

Question.

System works as it did when I installed it around 1990 but the outside bell don't ring anymore.  I could replace the whole lot but why?

Before I have a look inside the bell box can anybody remember what was inside?

I'll leave it there at the moment and see what developes.

Cheers

 

 

[PeterJames]

Any external sounder will do, the Bentley is quite old so before replacing the external sounder I would check that its not a fault with the panel bell output 

[james.wilson]

as above it could be externl sounder. That age it probably isnt an SAB so could be sounder failure, cable failure, panel failure etc etc

[sixwheeledbeast]

Pretty sure they are SCB's on that age Bentley. Maybe even positive trigger?

I would be checking the panel and it's outputs respond correctly to an alarm activation with a meter before even considering the ladders.

[james.wilson]

possibly pos tamper return too i cant remeber

[lancepar]

All understood, thanks.

Will, check at the panel first.

Cheers

[PeterJames]

13 minutes ago, james.wilson said:

possibly pos tamper return too i cant remember

Agreed it was pos return, and pos trigger iirc

[lancepar]

I found the instructions, that will help.

 

(Unusable image removed to save server space)

 

Edited May 7, 2020 by datadiffusion
Remove image

[james.wilson]

i cant make out the connections on that im afraid

[lancepar]

2 minutes ago, james.wilson said:

i cant make out the connections on that im afraid

Is this any better?