I have an Evohome with HW and CH systems in a S-plan configuration. It works except for this one issue that I hope someone has solved.
The HW works fine.
The CH triggers when the Kitchen demands heat, but all the other rooms do not independently trigger the boiler, i.e. only get heat IF the Kitchen also needs heat.
The Kitchen is set up without any HR92 (just a standard TRV) and gets its temperature sensor from the Evohome controller unit (in the kitchen).
All other rooms are set up with an HR92. All binding and signal strengths are fine.
Zone configurations:
Kitchen: Heating type = Zone valve; sensor = Evotouch sensor
Other Rooms: Heating type = Radiator valve; sensor = remote sensor (i.e. HR92)
The system summary shows that the demand % for the boiler control is the maximum of any zone (e.g. 100% if living room is 100% even if kitchen says 0%), but despite this the boiler/pump only goes on if the kitchen also demands the heat.
Advice is requested on how to set up the configuration so that any room can demand heating when needed, independent of the kitchen. Is this even possible?
I have a BD91 wireless relay for HW and a BD91 for the CH. These were wired into the legacy boiler system exactly as per the previous “non-smart” timer.
The CH system has a single motor controlled zone valve.
At the moment my workaround is to set the target temperature in the kitchen higher than the kitchen radiator/TRV setting can achieve so that the boiler/pump is never “off” during the set period, so if the HR92s in other rooms need heat then they can get it, but this means the kitchen is sometimes unnecessarily warm. Also sometimes if the oven is on / sun coming in etc. then the kitchen ‘overheats’ and switches off the boiler as it doesn’t need heat, which switches off all the other rooms.
Thanks for any advice.
The HW works fine.
The CH triggers when the Kitchen demands heat, but all the other rooms do not independently trigger the boiler, i.e. only get heat IF the Kitchen also needs heat.
The Kitchen is set up without any HR92 (just a standard TRV) and gets its temperature sensor from the Evohome controller unit (in the kitchen).
All other rooms are set up with an HR92. All binding and signal strengths are fine.
Zone configurations:
Kitchen: Heating type = Zone valve; sensor = Evotouch sensor
Other Rooms: Heating type = Radiator valve; sensor = remote sensor (i.e. HR92)
The system summary shows that the demand % for the boiler control is the maximum of any zone (e.g. 100% if living room is 100% even if kitchen says 0%), but despite this the boiler/pump only goes on if the kitchen also demands the heat.
Advice is requested on how to set up the configuration so that any room can demand heating when needed, independent of the kitchen. Is this even possible?
I have a BD91 wireless relay for HW and a BD91 for the CH. These were wired into the legacy boiler system exactly as per the previous “non-smart” timer.
The CH system has a single motor controlled zone valve.
At the moment my workaround is to set the target temperature in the kitchen higher than the kitchen radiator/TRV setting can achieve so that the boiler/pump is never “off” during the set period, so if the HR92s in other rooms need heat then they can get it, but this means the kitchen is sometimes unnecessarily warm. Also sometimes if the oven is on / sun coming in etc. then the kitchen ‘overheats’ and switches off the boiler as it doesn’t need heat, which switches off all the other rooms.
Thanks for any advice.
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