We have Evohome working with a Y-plan system, with an old vented hot water cylinder and an old boiler on an open vented heating system. There are two BDR91's in the airing cupboard, one that calls for hot water, and one that calls for heat. There are HR92 radiator controllers, and there is an automatic bypass valve. The cable to the boiler is wired to allow for pump overrun.
We are planning to get an Intergas HRE OV boiler and the Evohome OpenTherm Bridge.
Am I right in thinking that the above set up remains the same with the new boiler (including the cable to the boiler to power on the boiler, and in turn allow the boiler to power the pump) - the only difference is adding the OpenTherm Bridge to the new boiler?
I've read that there are ways of altering the wiring to allow for Priority Domestic Hot Water - but I presume that the new Evohome firmware will now do this with software?
Replacing the vented hot water cylinder with a new rapid recovery vented hot water cylinder will allow faster recovery of the hot water cylinder (while heating is temporarily suspended).
Assuming I've understood all of the above correctly - will Evohome via OpenTherm automatically adjust boiler temperature when calling for heating vs hot water? ie. the OpenTherm Bridge operates in parallel to the existing wiring to simply adjust boiler temperatures?
I realise I may have completely misunderstood how the OpenTherm Bridge is to be installed - the documentation seems to be severely lacking (hence why I'm making the assumptions above, otherwise I would expect separate wiring diagrams for when OpenTherm is being used).
PS. I'm not planning to install the boiler myself, I'm hoping to find someone that knows what they're doing - I simply want to understand it myself to make sure the installer is doing it correctly! (I did install the current wiring myself, so I do understand the current set up!).
PPS. I've been suggested getting the eco RF instead without connecting it to hot water, so using heat only function - but am I right in thinking this would mean converting to an pressurised sealed system (eliminating the expansion tank in the loft?).
We are planning to get an Intergas HRE OV boiler and the Evohome OpenTherm Bridge.
Am I right in thinking that the above set up remains the same with the new boiler (including the cable to the boiler to power on the boiler, and in turn allow the boiler to power the pump) - the only difference is adding the OpenTherm Bridge to the new boiler?
I've read that there are ways of altering the wiring to allow for Priority Domestic Hot Water - but I presume that the new Evohome firmware will now do this with software?
Replacing the vented hot water cylinder with a new rapid recovery vented hot water cylinder will allow faster recovery of the hot water cylinder (while heating is temporarily suspended).
Assuming I've understood all of the above correctly - will Evohome via OpenTherm automatically adjust boiler temperature when calling for heating vs hot water? ie. the OpenTherm Bridge operates in parallel to the existing wiring to simply adjust boiler temperatures?
I realise I may have completely misunderstood how the OpenTherm Bridge is to be installed - the documentation seems to be severely lacking (hence why I'm making the assumptions above, otherwise I would expect separate wiring diagrams for when OpenTherm is being used).
PS. I'm not planning to install the boiler myself, I'm hoping to find someone that knows what they're doing - I simply want to understand it myself to make sure the installer is doing it correctly! (I did install the current wiring myself, so I do understand the current set up!).
PPS. I've been suggested getting the eco RF instead without connecting it to hot water, so using heat only function - but am I right in thinking this would mean converting to an pressurised sealed system (eliminating the expansion tank in the loft?).
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