I have fitted Vaillant Ecotec plus 630 and Megaflow. I managed to get central heating to work normally but hot water cylinder only heats up when heating and hot water are both on at same time at programmer. Both 2-port valves are working. How do I wire it through Danfoss 16 terminal wiring block.
I cannot find any info on the net and two 30 minute phones call to Vaillant have also proved fruitless.
It must be simple.
I cannot find any info on the net and two 30 minute phones call to Vaillant have also proved fruitless.
It must be simple.