Discuss Honeywell D90T Thermostat in the Central Heating Systems area at ElectriciansForums.net

johntheo

DIY
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How is the above (wired type) installed in a normal? S plan where the room stat(s) are fed from the programmer so a switched live, does the Honeywell have batteries as I think I've read somewhere that it needs a permanent live. Two wire stat presently installed with supply (switched) from the programmer.
 

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