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Found 2 results

  1. Barnacles
    Hi All, We have recently bought a newly built "dolly house" which is equipped with an Ideal Combi ESP1 35 boiler with 2 zones (upstairs and downstairs) managed by Honeywell T6R wireless thermostats. I have been looking into heating controls for friend and got around to the learning a bit about OpenTherm and weather compensation. Then it dawned on me to check my own CH system and I was not entirely surprised to find that although both my boiler and thermostats support OpenTherm it wasn't being used! Clearly the plumbers weren't ready to embrace the new technology. I then learned that my boiler also has the option of weather comp too and this got me thinking. As it would cost very little and take minimal effort to modify my system to use either OpenTherm or weather comp would one have any significant benefits over the other? If it were your house which would you choose? The Honeywell control box is right next to the boiler so running a cable for OpenTherm would be a doddle and I can easily run a cable from the boiler to a north-facing wall for a temperature sensor for weather comp so either way would take no more than 30 minutes work.
  2. Jeremy Harris
    Currently I have have a standard (22mmm thread?) 230 VAC thermal actuator that turns on or off the return from the UFH manifold, as a part of the heating /cooling comtrol system. This actuator is a NC one, that opens when 230 VAC is applied. We have a minor problem in that when there is a call for heating or cooling there is a delay before this valve opens. This doesn't matter in heating mode, as the ASHP can unload into the buffer tank, but in cooling mode the only load is the UFH, and because the UFH valve takes 8 minutes to open, it means that the pressure bypass valve opens, and the ASHP shuts down for a few minutes. What I'm looking for is a faster Thermal actuator, that will be a direct replacement for the 230 VAC NC unit, but that will open a lot faster. The temptation is to drain the system and install a fast acting 12V motorised ball valve, as is fitted to the buffer tank, but that means draining and refilling the system.
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