OpenTherm can work in some very clever ways, but Evohome does not transmit compensation data to alter the water temperature, so this was not used here. By default, with my boiler, the Max is 90C despite the maximum CH temperature being set to 60C at the boiler front panel. A temperature offset is thus an error correction of the existing temperature conditions in a room at. Basically, the Evohome OpenTherm bridge calculates the Control setpoint temperature from the aggregated peak percentage demand from all zones, and this is ranged within any received Max CH water setpoint.
Our customer had Evohome zoning, and this does have an optional relay module that communicates to boilers with OpenTherm. This can be compensated for with a temperature offset. In contrast, oil boilers in the UK are all still predominantly made from mild steel like they have been since the 1950s – so would be damaged by internal corrosion if water was returned below their parameters for the non ferrous part. This is not a new phenomenon, and is particularly suited to gas condensing boilers because most of them have no minimum return water temperature. to install and set up however the weather compensation is not the best. It is untroubled by low heating water temperatures, such as those produced by underfloor heating and low temperature radiator systems.ĭuring the installation of this particular LCB700, we wanted to see if we could add weather compensation to the radiator system. Honeywell Evohome is the best solution for a whole house heating & hot water. Unlike all other UK domestic oil boilers, this unit is a single stainless steel design, built as a Blue Flame unit, rather than a converted existing orange flame model. The Navien LCB700 external model is a green cased highly insulated kerosene boiler (also able to run on diesel) using Blue Flame burner technology.
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