modulation

Hi All, I have a Vaillant ecoTEC 637 plus, likely fitted ~2017 mounted as a system boiler, single zone, with a separate water tank for DHW. The thermostat is a Salus RT500 wired via the 230v RT connection. There is also a Drayton scheduler. (Small parenthesis: It is also a classic case of...

Hi All New house, new boiler! The set-up is: - Vaillant Ecotec Plus 637, system boiler single plan - Tank elson zircon 250zi, no immersion - Programmer Drayton LP722 (dual channel, heating and hot water) - A Salus controller, not too sure what does is used for. As you can see from the PCB...

Range rating a boiler means adjusting its output to more closely match the heat requirements of a property, while on the other hand boiler modulation also reduces the output of the boiler to match the heat requirement of the property, as it gets close to its desired temperature. Range rating...

Hi, I've joined because I have a lot of trouble with trying to make my new boiler work with the Opentherm interface and thought someone with more experience than me could help. Equipment: Drayton Wiser - Single Channel Programmer with Opentherm module. Baxi 836 Combi boiler with Opentherm...

My old system boiler (16yo) is setup in S-Plan configuration. I want to get a new Worcester system and Easy Control (finer control with modulation/condensing.) I understand DHW has to be heated to over 65deg but I would like my heating flow temperature to be much lower particularly in the...

Ive opened a can of worms by researching the heating system for our refurbishment. We are having a central heating system installed. The proposed boiler is a Vaillant ecoFIT pure (think 618 but not definite). The heating will have 3 underfloor heating circuits for two zones. Builder intends...

I have a Vaillant ecofit 425 heat only boiler on a Y plan system. Controls are all Vaillant, a VRC 700f, VRC 920 gateway, 16 radiators with 15 Ambisense TRVs, the one remaining radiator TRV free as a bypass. So far so good. I'm broadly happy with the system though the Vaillant app is unreliable...

Hello everyone, first post and I can't find anything on the search function. I have just had a new WB Greenstar 8700 system boiler installed. It is controlled by an Easycontrol wireless thermostat. The plumber has been useless - installed it, switched it on and said let it run for a few days...