Hi,
I have an unusual setup with Zone valves controlling 3 CH circuits (gnd, 1st and 2nd floors, no HR92's at present), a DHW circuit and also a UFH circuit zone valve which further comprises of 4 sub UFH zones each controlled by BDR's controlling the manifold actuator. Boiler demand is wired so that any 1 of these zone valves triggers the boiler via the orange and grey end switch.
Strange, I know, but it has by and large worked for the last few years aside from an ongoing concern that it wasn't benefiting from any optimisation. I've since confirmed this by graphing temperatures and gas useage and I can see that the boiler only ever fires at the same time or shortly after 1 or more zones set point changes above the current zone temp. With optimum start you would expect the boiler to be firing in advance of any zones set point changes, in the case of UFH you would expect that a long time ahead of this. This never happens, boiler demand always coincides with set point demand. I have reset Evohome controller and rebound all devices at least once configuring Optimum Start and/or Optimum Stop on all zones.
I plan on introducing HR92's on a zone by zone basis and introducing a UFH HCC80 controller in due course, but in the meantime is there any fundamental reason why this setup would somehow prevent any form of optimisation? Any ideas on how to enable optimisation with this setup?
thanks
I have an unusual setup with Zone valves controlling 3 CH circuits (gnd, 1st and 2nd floors, no HR92's at present), a DHW circuit and also a UFH circuit zone valve which further comprises of 4 sub UFH zones each controlled by BDR's controlling the manifold actuator. Boiler demand is wired so that any 1 of these zone valves triggers the boiler via the orange and grey end switch.
Strange, I know, but it has by and large worked for the last few years aside from an ongoing concern that it wasn't benefiting from any optimisation. I've since confirmed this by graphing temperatures and gas useage and I can see that the boiler only ever fires at the same time or shortly after 1 or more zones set point changes above the current zone temp. With optimum start you would expect the boiler to be firing in advance of any zones set point changes, in the case of UFH you would expect that a long time ahead of this. This never happens, boiler demand always coincides with set point demand. I have reset Evohome controller and rebound all devices at least once configuring Optimum Start and/or Optimum Stop on all zones.
I plan on introducing HR92's on a zone by zone basis and introducing a UFH HCC80 controller in due course, but in the meantime is there any fundamental reason why this setup would somehow prevent any form of optimisation? Any ideas on how to enable optimisation with this setup?
thanks
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