My cousin is trying to connect an Ecobee 3 to his Carlin 60200 and Buderus boiler. The system does not have a C wire and he is not sure where to connect the power extender kit to on the system. What we believe to be the control panel on the Carlin is labeled T,T,F,F,A,A instead of the usual thermostat labeled wires (W, Y, G, Rc, R, C). Does anybody have any experience with this type of system and hooking up a smart thermostat? Or are there any other workarounds that are easy and will not damage the system?