Ok here you can see the drilled hole, at that stage i was shitting my pants hoping that everything went fine, i have used 2 drill bits one small one and then a bigger one. As you can see the boiler is nicely clamped, last thing you want is the boiler to move around when you drill!
Oh, make sure you descale your boiler before you drill, you cant really see but the spiral and brass element is much cleaner ... the white shit on the walls i scrubbed with an old toothbrush later on. On this picture you are looking straight through the threaded boiler ... haha once again at that stage i was thinking to myself "what if it doesn’t work" - Be sure to was all the brass shavings out of it
Ok this is the length of the probe that went into the boiler ... its fair long as there is hold water at the bottom of the boiler and the hot water on the top ... so u want the best of two world!!! The response time to the PID is really good, so no worries there. The probe was custom made for my purpose!
There is the side look to it ... as you can see on the PID there is the Set temperature (in green) and the actual temp (in red) ... the PID pulses the boiler when its in range, like i said the response time is pretty good .. so when temperature starts to drop it knows to turn on before it hits the minimum value.. there is still some temperature loss through out the extraction but the PID brings it back pretty quick!
Sorry for the crappy quality photos used my phone to snap the photos ... if you want to use these somwhere else please refference back to this page ... better still send me an email and ask for permission.
If you missed the discussion find it here
(c) 2005, Kiril