2
Introduction
You have purchased a Thermostat EFIT 540/550, which 
forms an integrated part of a Danfoss system.
Danfoss has developed the Thermostat EFIT 540/550 to 
make your fl oor heating an even more environmentally 
correct way of heating your home.
Thermostat EFIT 540/550 will work dynamically with both 
the room  and fl oor temperature in order to give you the 
highest possible comfort in the most economical way.
Thermostat EFIT 550 ONLY:
Furthermore, Thermostat EFIT 550 will take a few days to 
optimise the use of the heating system, but it does not stop 
there. The Thermostat EFIT 550 will continue to learn from 
the room and thus constantly improve its performance and 
consequently your comfort and economy.
We wish you many years of comfort with your new Danfoss 
system.