Oh - and I forgot say - it is undesirable for the water to boil because the steam causes condensation which wets the insulation, and excessive boiling will discharge water through the overflow pipe, loosing with it the precious inhibitor additive.
Since even the best stoker may misestimate, we have added a feature whereby, when the 95 degC thermostat trips, a one-hour timer is started during which both main-house heating circuits are energised regardless of the room-thermostat. Thus excess heat is dumped to the house to bring the water temperature down.
If I redesign TB4 Monitor then it would be very simple to built this feature in, rather than having to use a separate 95 degC thermostat and one-hour timer with its relays to energise the heating circuits.
Turboburn Monitor part 1
Turboburn Monitor part 2
Turboburn Monitor Plus
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