I've got a problem with the hotwater on a install and was wondering if anyone else has had the same issue? I haven't had it occur on mine or a few other systems just this one.
The hot water randomly seems to overshoot by 10 to 15oc, but only once every week. The set point is 50oc with a 10oc drop and 0 min overrun time. It overshoots to around 63oc which I think at that point the actual Cylinder/High Limit stat is cutting off the motorised valve. I've tested the signal strength which is fine, and the Hot Water relay isn't opening with any other zones/calls for heat so that eliminates that. There is no boiler relay just BDR91s set up as heating & hot water valves.
Rung Honeywell support which were less than helpful but have said to replace the Hot Water kit and to see if it sorts the issue.
So has anyone else come across the issue? And also if you delete the hot water kit from the EvoHome can you just repair it without having to reset up your zones?
The hot water randomly seems to overshoot by 10 to 15oc, but only once every week. The set point is 50oc with a 10oc drop and 0 min overrun time. It overshoots to around 63oc which I think at that point the actual Cylinder/High Limit stat is cutting off the motorised valve. I've tested the signal strength which is fine, and the Hot Water relay isn't opening with any other zones/calls for heat so that eliminates that. There is no boiler relay just BDR91s set up as heating & hot water valves.
Rung Honeywell support which were less than helpful but have said to replace the Hot Water kit and to see if it sorts the issue.
So has anyone else come across the issue? And also if you delete the hot water kit from the EvoHome can you just repair it without having to reset up your zones?
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