[COLVERT]

Originally Posted by HarryM1BYT

Thanks, but I am still trying to get my head around its problems, I have just found another issue, with the Legionaire system program. It is supposed to ignore the set temperature for the HW cylinder, to heat the HW even hotter to kill any bacteria in the cylinder. It seems to be running the boiler flat out to do that, but above a certain temperature (of the cylinder I assume), it begins cycling the valve and passing boiler heat to the CH circuit when there is no demand. So I'm pretty sure it is not controlling the valve actuator quite as it should. Very confused..

Harry. That passing of the boiler heat to the CH circuit sounds like it might be the temperature sensor. The sensor could be sending an OVERHEAT signal to the circuit board. As a safety feature the board would open the diverter valve to get rid of what it thinks is excessive heat in the boiler.

It's not demand opening the valve, but maybe just a faulty sensor signal.

Could be why the temperature to kill the bacteria will never be achieved.



Colvert.