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i wander
old thermostats have 2 bimetal switches in the control line
1 in serie say 32 degree NC wich contact opens if it gets above 32 overtemp protection
1 in parallel NO 7 degrees wich closes making contct when it gets below 7 degrees frost protection
no such protection with opentherm i think
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Arduino opentherm thermostat
i wander
old thermostats have 2 bimetal switches in the control line
1 in serie say 32 degree NC wich contact opens if it gets above 32 overtemp protection
1 in parallel NO 7 degrees wich closes making contct when it gets below 7 degrees frost protection
no such protection with opentherm i think
https://youtu.be/nkKxdKuNrw0
http://ihormelnyk.com/opentherm_thermostat
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