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Hi All, I am curious to hear if anyone knows if the Vaillant VR33 Module that can be used to convert Vaillant Boilers to support OpenTherm also works together with the Vaillant AroTherm ASHP range? As far as I can understand Vaillant uses a very old protocol (eBus) for communications between...

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...

Hi! I have a VRC700 coupled with VR71 at the moment, but all schemas I can find contain mixing circuits, but all circuits i have are just straight radiators. Is there a way to change them in VRC700 settings, or do I have to use different schema? Do you know where i could get a complete list of...

Hi All I have had a search through previous posts and google, but everything I find seems to get me more confused. I have just had a new Vaillant boiler fitted, an ecoTEC plus 838 combi. It is just the boiler at present, operated by the controls on the front only. My plumber is offering to...

Hiya Following on from an earlier thread. I have a glow-worm Ultimate2 35c combi gas boiler, and have recently (black friday woo!) got a Tado 'smart' thermostat. I have currently installed this in a like-for-like situation using the wiring the old mechanical thermostat was on (some 1.5mm t&e)...