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My existing thermostat is the Danfoss FP715si thermostat and is 230VAC or 24VAC electronic manual (http://heating.danfoss.co.uk/PCMPDF/38161v01s7-06.pdf)
I want to retrofit this with the Ecobee 3 SMART wifi thermostat. After emailing Ecobee 3 tech support they stated that 'our thermostat run off a 24V system. This [Danfoss] thermostat looks to be running on 230V. This thermostat is also a communication type thermostat. It does not have the standard wire terminals that our thermostat requires'
The Ecobee 3 thermostat comes with a power extender kit for existing installations that do not have a C (common) wire. Do tech support mean this wire when they say 'standard wire terminals'? The wiring diagram on page 5 of the manual is not clear at all