In order to get the best possible result when using the 
Thermostat EFIT 540/550, the thermostat should be 
installed in the wall, following a few basic rules:
•  Installation height, typically between 80-150 cm.
•  On a wall NOT facing the outside
•  On a wall where it will NOT be subjected to direct sunlight
•  Away from windows/doors that will open occasionally
•  It must not be covered by curtains, towels etc.
The Thermostat EFIT 540/550 should not be installed in 
small rooms with insuffi cient ventilation, such as bathrooms. 
In these instances, place the thermostat just outside the 
room (only use the fl oor sensor - FS). 
The thermostat must not be placed close to areas with a 
high risk of water stains, e.g. close to running water, toilets 
etc.  
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