Fire Alarm problem.

[trev]

Ok Stu, sort it out and what ever time is best I'll be there.

 

[pennychew]

Dont mind really, enjoy Newcastle we get a lot of work here for electronic hotel locks, and the guys are great to work with...plus we get free accom, food a beer.

What time you leaving tomorrow mate? The shopping centre won't let you test a fire alarm til it shuts at 17:30

 

[trev]

We shouldn't have to test it Stu, we can go back on Monday to do functionals after they close.

 

[trev]

I know that sounds terrible but you know what I mean.

 

[pennychew]

I know that sounds terrible but you know what I mean.

Haha, yeah I knew what you meant!

 

[tazz]

can always pull one with Best Western for an extra night, their pretty good to us.
So will see how it goes,

 

[tazz]

Trev just look at you photos again, and can see problem, relay should be connected to CFR and 0v.....this is your problem,

 

[pennychew]

Trev just look at you photos again, and can see problem, relay should be connected to CFR and 0v.....this is your problem,

Thats how it was before we moved them around... we had the aux cable connected to CFR and 0v if i remember right? this is when it seemed to work ok. there were two resistors and connector strip in the NO terminals

 

[tazz]

ok relay should then operate on fire condition, and pull off on reset
the resistors will be for signalling shopping centre fire and fault

 

[pennychew]

ok relay should then operate on fire condition, and pull off on reset

Actually i think we had it in CFT and 0v, the relay needs 24v to pull the A/C contactor in

 

[tazz]

ok CFT is fault relay output and is constant 24v, in fire it powers down.....CFR is fire relay output and has no power util fire condition.
if you had connected to ov and CFT this would course sounder fault, because it is ov switching. CRF is +24v switching

 

[pennychew]

I'm positive this is what the fault is but surely the alarm engineer that's just been out should have been able to terminate the cables in the right positions? Unless he didn't know the relay needed constant 24v but I would imagine they installed it like that in the first place

 

[tazz]

well this is were the problem is, as CFR is switch 24v so is not a constant supply....it not a problem as we can change the primary relay changeover contacts which control the contactors

 

[pennychew]

That would explain why we were reading 24v across Cfr and 0v but when we connected the relay up to these the voltage dropped out and it wouldn't pull the contactor in

 

[tazz]

Well tomorrow, we will test each section at a time, and work our way through it, should be a major problem.