F47/Hc1HeatCurve

Hc1HeatCurve is a message often encountered on Vaillant weather compensators. It usually belongs to "f47" circuit.

It represents the relationship between outside temperature and boiler's heating flow temperature. This number has a direct effect on energy efficiency of the boiler - the lower Hc1HeatCurve is, the more energy efficient the boiler should become. On the downside, the time boilers needs to respond to temperature changes gets longer when lowering Hc1HeatingCurve.

Setting Hc1HeatingCurve to value lower than 1.5 is not recommended.