The Efficient Home Forum

What valves do you use? I've had a similar problem with soma Italian valves that did not open as quickly as Evohome expects. So the boiler runs but no flow through the radiator. My solution was to set the HR92 to full stroke. They're all HR92s. Travel setting doesn't change anything and wouldn't ...

Well, another day's testing reveals more on Opentherm behaviour. I have run more tests on both zones with single HR92s and those with 2 HR92s. I have essentially reset the entire system and re-bound everything, including valve calibrations. None of that has made an ounce of difference. I also ...

The plot thickens... I recalibrated all HR92s which made no difference. It appears this phenomenon only occurs in the 2 zones that have 2 HR92s in them (as there are 2 radiators in these zones). If the actual temperature of the zone is equal to target temperature the boiler fires and then reverts ...

Apologies, that was a bit of a bad explanation. It happens when the room temperature and set point are equal. I.e. Room temp shows 19deg with a set point of 19deg. If it's 0.5deg or 1deg lower the HR92 will open and demand shows in the evohome with heat going to where it needs to be. Similarly, if ...

This is an annoying trait. Honeywell's new firmware allows you to monitor each zone. My Intergas HRE 24 OV will switch on the CH pump, fire up, burn some gas, switch off (code 1). The pump will run for anything up to an hour with zero call for heat from any zone. Periodically it will switch off and ...