Johntheo5
I have checked SL ( with a DMM and digital scope) and its stable at 240v when it should be
but i take your point of adding an additional load to verify. thanks
I take your point re the s plan although there are 100k's (or more) of y plan systems operating perfectly ( apart from the slight issue of the valve motor continually using power under certain conditions)
I note that you did not mention the pump so i assumne you do not believe that would...
double checked (infact about quadzillion checked !!) wiring in JBox for connections to mid pos, valves and room and tank stats, to boiler. all as per spec.
It seems to come back to flow when just CH selected, even though pump is powered and running aven though allm rads getting hot ?
nd system...
Hi again, sorry for delay in posting, away
dilalio
with 3 port manually opened (to mid point presumably) and just CH selected, boilere beahves as above. That is c on boiler and SL at 240v and pump at 240v and running. blue burner light on for a few secs and then off..
(de selectmanual overide...
I have not tried that combination. I will do that later on today and repost.
Special thanks to dilalio and madrab for all their useful and knowleable input so far
But all rads are getting hot, suggesting that circ pump is ok, and spindle spins freely. Not sure on pump age
the boiler is shutting down within couple of secs. Not even ideal can get a boiler to raise temp that quickly !
existing system, new build from 12 years ago. As per original installation.
There is no mag filter
madrab - I totally agree something not right. I cannot get my head around there being a call ( c ) on boiler display whether on HW only or CH, and the boiler somehow differentiating c for CH only...