Hi Motoz,
You are completly right concerning "old software" and "old controllers"
I was not clear enough in my answer, so I will update my post
Anyway all v6 control boxes from v6.50 and onward have the functionallity I describe.
Older controllers have different behavior, some regulate the blower some regulate the pellets feed and some doesn't work
Do not worry about the two I-controllers working "together", it works
The main regulation is the blower regulation which is straigth on, while the pellets feed regulation is kind of looking on what the blower regulation does and rgulates according to that.
Means, if the blower regulation has positive output (sum of P and I) then the pellets feed are reduced a bit (correction factor is manipulated) with a percentage of the output from blower regulation.
Reverse goes on if blower regulation has negative output.
The correction factor is manipulated for the range of actual power, Low, Mid and High, and the regulation is very slow.
Best regards
Michael
The older V6 boxes actually had 'PD' regulation of blower speed and 'I' regulation of pellet feed, even if it's called 'PI' in the menus (I can back that up by having actually measured and logged blower speed response in different scenarios with my V6.33, http://www.stokerforum.dk/index.php?topic=4831.0). I understand that in V7/10 the blower speed regulation is now actually P+I, but it seems strange to me how two 'I' regulators can work in parallel. If the blower speed 'I' component is faster than the pellet feeder 'I' component then the blower speed will rise or fall until the oxygen error is zero and then the pellet feed 'I' component does not have anything to act on anymore, stable state reached. Or alternatively if the pellet feed 'I' is faster then that will 'win'. I suppose it works if there are limits on the blower speed 'I' component, so that when it has reached the floor/roof it stops there and the slower feeder 'I' continues to wind down or up.
Btw, I vaguely remember having read somewhere that even older versions acted only on pellet feed. Blower regulation was apparently added later, possibly later than V4.12?
