The Efficient Home Forum

Truth is that my assumption was that 29% reported for the valve was related to the position of the valve. I will check this of course. It is related to the position of the valve but it is not a 1:1 relationship, the relationship is as I've shown in the graph, and is based on actual measurements of ...

I had my lounge which has 2 rads and hence 2 heads change temperature to 23C from 20C on 17th November 2017 at 14:20 in the afternoon while I wasn’t there. The schedule screen reported that it was caused by override, but there is only me in the house and there was no iPhone logo to indicate the cau...

Thank you for confirming the way for operation. I still convinced that there is no reason to not open valves completely and regulate zone temperature by controlling water temperature if that zone is the only one requesting heat (or even opened 100% for the zone requesting most heat, if more zones r...

Hate to disagree but this is not what I was told by the Honeywell team when I was part of the installer trials before evohome was launched. The sensor will read the same information back to the evohome Controller irrespective of the offset on the HR92. It may well have done something when it was a ...

I was told first hand by the guys at Honeywell who invented the HR92's that this is a visual offset. You can show this by adjusting this to different offset settings and then putting them all on the table together. They are just showing the offset temp visually. More likely the system has settled d...

First post! Purchased my Honeywell Evohome through a local Honeysell installer before Christmas. Honeywell seems to be struggling with my little problem, so I thought that I would look here. On one heating zone - one radiator (HR92) - my Controller shows a Temporary Override on three mornings of th...

No, evohome will always frost protect at 5 degrees C otherwise things have a habit of freezing and bursting. Not quite true. :twisted: You can't disable frost protection of a heating zone from the controller or schedule, however if you set an HR92 manually to OFF using the built in dial, it DOES di...

Put simply the Evohome calls for heat or HW; this opens either a heating 2-port valve or a HW 2-port valve. Once open, the action of opening the valves triggers a switched live cable to the boiler. This switched live, first turns on the pump and, after a period of time, the boiler fires. When the s...

To test the Hot Water function, I started with a cool cylinder of water 30 Celsius. The system had been installed 48 hours earlier so everything was at equilibrium temperatures. The boiler is set to operate at 65 Celsius. The hot water temperature for this test was set at 50 Celsius. It took the bo...

With TPI, as the document posted above explains, cycling the boiler on and off frequently (10 minute cycles by default) when there is only a small but non zero demand is by design. The proportion of time that it is on for each 10 minute cycle controls the total amount of heat put out by the boiler. ...