ecobee thermostats require a C (popular) wire to energy on. When your current thermoregulator utilizes just two cables (R and W, or T and T), you will find a few installation choices available, based on the application.
Before starting out, take note the annotated following:
You simply will not manage to install the Power Extender Kit (PEK) with heat-only 2-wire systems. The PEK can simply be properly used on furnace or temperature pump systems that do not have a C cable вЂ” it is because the PEK calls for R (energy), G (fan), and Y (compressor) cables to use, and these 2-wire heat-only systems do n’t have these G and Y cables
To find out compatibility, you shall want to access both the wiring at your thermoregulator along with the wiring at your heating system where in fact the thermoregulator wiring finishes. Read More