W-B 24i RSF problem with mechanical timer

[scotchgambit]

Hi. Problem with mechanical timer on W-B 24i RSF boiler. It has 3 settings - o(off), Auto and I(perm on). The timer will only turn when in the perm position. I have looked at the timer and the contacts and mechanism looked fine. Then had brainwave. I set the timer on Auto and then put it in a position where the heating should be on ie where some of the little pegs where in a down position and lo and behold the timer turned round until it got to the position where it turned the heating off and then stopped turning. Conclusion - it's not the timer but the electrical conns to it. There are 2 wires - a blue and a grey (and also the brown live feed).

At present blue is conn to timer motor and grey for signal to boiler to start heating- little diags on back of timer.

Is it possible somebody has connected blue and grey wrong way round?

I have just bought the house and the heating was already installed.

Has anybody got wiring diag for the timer and/ or boiler or suggest where I can obtain this.

All help gratefully received.

Dave

 

[bengasman]

Never heard of a problem like this, sounds like clock is dead

 

[jossper]

I think you are on the right track here with swapped wires but not the blue and grey. Sounds more like the brown and grey are swapped so the timer motor only gets power when the boiler is on.

Installatio instructions for boiler might help:

http://www.worcester-bosch.co.uk/index.php?fuseaction=literature.detail&con_id=5404&from_id=5029

Check carefully before swapping any wires

Paul