On Sun, 25 Feb 2007 01:34:23 +0000, Adrian C wrote:

If I were an enterprising soul, I would be putting together a crack team
of gas boiler experts, electronic and software engineers and setting out
building a replacement PCB. It might not need to be reverse engineered
from the originals, such would be the expertise of the engineers to
design something from the ground up that does something useful with the
rest of Potterton's hardware. It would, of course, be submitted to
whatever regulatory body exists to certify it's use as part of a safe
gas appliance.

As I'm neither an enterprising soul nor a competent electronics design
techie I can only speculate. I deal with a number of woodburning devices
that are PIC controlled and they are off the shelf components with
firmware blown onto a rom. I have on two occasions needed to upgrade the
firmware, once to a boiler pic and once to an associated feed line.

The lower volume manufacturer of the feedline has used a mitsubishi alpha
controller and this looks like it could handle input functions from limit
switches sensing flue gas, O2, flame sensing and modulate fan speeds etc.
All easily reconfigured from the free gui programming software.

I had considerer trying to run a dishwasher with a sticky timer off one
but the cost benefit wasn't there.

AJH