sparkytim
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- Mar 14, 2010
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Just been caught out by this one, BE WARNED.
A new range of VALLIANT Combination boilers are now out that have a new wiring connection arrangement.
You know how it is, wired so many of the older range the same way did not even look at the book (DOOOH!)
Same looking PCB mounted connection terminals, L,N,E, now a small 3 pin mini plug, next to it 2 terminls like before that WERE Volt FREE two wire link to external controls, you use to take a link out and wire in your stat./ external programmer etc.
So last week pre-wires a boiler ready before Gas is on, checks continuity all ok up to these terminals, RF stat switches ok as it should.
Gets called back after system up and running a few days as user is unable to switch heating OFF, other then resetting Boiler stat to minimum.
Goes to check it out, all externals doing what they should, disconnect switching pair in boiler and it still runs constant.
Must be boiler fault or internal settings not correct.
Valliant send Engineer in, NOT WIRED CORRECTLY.
The new range now have a different link to remove or it stays on constant, + only ONE of the two terminals is now used as a SWITCHED LIVE and the external control needs a 230 Volt feed.
No warning of the change inside the boiler or installation info.
So lesson learnt, never take things for granted, always read the instructions. :Blushing
A new range of VALLIANT Combination boilers are now out that have a new wiring connection arrangement.
You know how it is, wired so many of the older range the same way did not even look at the book (DOOOH!)
Same looking PCB mounted connection terminals, L,N,E, now a small 3 pin mini plug, next to it 2 terminls like before that WERE Volt FREE two wire link to external controls, you use to take a link out and wire in your stat./ external programmer etc.
So last week pre-wires a boiler ready before Gas is on, checks continuity all ok up to these terminals, RF stat switches ok as it should.
Gets called back after system up and running a few days as user is unable to switch heating OFF, other then resetting Boiler stat to minimum.
Goes to check it out, all externals doing what they should, disconnect switching pair in boiler and it still runs constant.
Must be boiler fault or internal settings not correct.
Valliant send Engineer in, NOT WIRED CORRECTLY.
The new range now have a different link to remove or it stays on constant, + only ONE of the two terminals is now used as a SWITCHED LIVE and the external control needs a 230 Volt feed.
No warning of the change inside the boiler or installation info.
So lesson learnt, never take things for granted, always read the instructions. :Blushing
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