Hi. I'm looking for some advice on setting up my Vaillant system. I have an Ecotec Plus 618 boiler, controlled by a VRC 630 panel. There are 3 circuits -the hot water, the underfloor heating (which is a mixer circuit), and the upstairs radiators (which is a direct circuit).
My problem is that whenever the hot water is on, the radiators don't work - even if the cylinder's up to temperature. The underfloor (mixing circuit) works fine in tandem with the hot water, but never the rads (direct circuit).
I have 'parallel charging' enabled, which should allow heating circuits to operate at the same time as the hot water.
Can anyone shed any light please? V grateful for any help.
My problem is that whenever the hot water is on, the radiators don't work - even if the cylinder's up to temperature. The underfloor (mixing circuit) works fine in tandem with the hot water, but never the rads (direct circuit).
I have 'parallel charging' enabled, which should allow heating circuits to operate at the same time as the hot water.
Can anyone shed any light please? V grateful for any help.