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5. System description
a) General information
The wireless thermostat system (composed, for example, of the ‘FS20 STR’ wireless thermo-
stat and one or more ‘FS20 ST-2’ wireless switch sockets or other FS20 wireless control
components) has many advantages over traditional thermostats that are built into electrical
radiators or air conditioners:
• The control functions in the integrated thermostat of an electrical heating, cooling or
ventilating appliance are impaired by immediate proximity to the appliance.
For example, it may be warm near the electrical radiator, but cold in a more distant part of
the room.
The ‘FS 20STR’ wireless thermostat can, by contrast, be mounted or installed independ-
ently of the heating, cooling or ventilating appliance.
This means the temperature is measured at the desired location and the ‘FS20 ST-2’
wireless switch socket is turned on or off in such a way as to control the heating, cooling
or ventilating appliance.
• If multiple FS20 switching units (for example, the ‘FS20 ST-2’ wireless switch socket) are
in use, the ‘FS20 STR’ can also control multiple heating, cooling or ventilating appliances.
• The time program option makes it possible to adapt the system to the lifestyle of its users,
so that the room is always comfortably warm when it is used. At other times energy can be
saved by reducing the temperature. It is no longer necessary to constantly manually set and
reset your thermostats.
• The separate control device (‘FS20 STR’ wireless thermostat) and FS20 switching unit (for
example, the ‘FS20 ST-2’ switch socket) mean the heating, cooling or ventilating appli-
ances can be positioned almost anywhere you like.
• Thanks to the ‘FS20 STR’s radio transmission and battery operation, there is no need to
lay cables.
