The Efficient Home Forum

I saw this after recently adding DHW control to our already existing CH Evohome system. As per other threads I've done an imperfect retrofit to our S-Plan system, taking the system demand / boiler control BDR to the CH 2-port valve and the new hot water BDR to the DHW 2-port. This means that when ...

Any idea which bit isn't working? You probably need to unpair the old BRD91, pair the OT bridge, ensure OT bridge is talking to boiler, that boiler knows it now has an OT module, etc. The "System Summary" in the "hidden" config menu might help you understand what Evohome thinks it has to control ...

Hi I find myself in the same situation as Ash having purchased a HRE80 with no external antenna, is there any other way of controlling this temporarily ? If you need to get them going urgently or with certainty by a particular date then this may help: https://ensupport.getconnected.honeywellhome ...

Is there a lost comms message in the central controller?

It's the first time I've seen that risk mentioned. Who else with 8 years of evohome experience that you have asked before? Operating a zone valve 6 times an hour, will cause excess wear and tear on the synchron motor and mechanism. At the end of the day, evohome wasn't designed to operate like your ...

Latching open works fine, but C is highly not recommended, because treating a zone valve like a boiler demand will lead to premature failure of the zone valve. Either remove it or electrically disconnected and latch it open. It's the first time I've seen that risk mentioned. In a pre-Evohome system ...

The EVOHOME Shop wrote:There will be more information on the Automated Home Forum than there will here.

Thanks - I'll try and feedback any key findings.

So just really two points to clarify. We don't have S Plan systems and HR91/HR92's. As per page 46 of the latest evohome installation guide you will see that when HR91/HR92 are fitted to all radiators, there is no motorised zone valve for the radiator circuit. This is critical in how the evohome ...

Called Resido and they pushed 17.03 without any apparent dramas. Minor surprise at how old the firmware was, but no sign of caution!

May need to call again if 19.33 doesn't appear on its own soon...

Thanks

It does indeed appear to work that way. I've now replaced separate controllers for UFH and DHW with Evohome components, including relay to 2-port valve. When either of them needs heat relevant relay plus the CH one light up, and everything works as expected due to the HR82s being closed.