• The start time of switch PROG is , which cannot be
changed, only its temperature can be adjusted. So under the
factory default settings, the thermostat performs only one
switch (PROG ) every day, which is in effect from until
the next day.
Note: Setting just one switch for a day (factory default setting) is
reasonable only if a constant temperature is needed all day. (For
example, if for every weekday a constant 16°C, and for every weekend
a constant 22°C is needed.) Otherwise, from both a comfort and an
energy-efciency point of view, it is recommended to activate more
than one switch for each day. Furthermore, it is advised that a comfort
temperature is used only those times, when the room or building is in
use, since every 1°C decrease of temperature saves approximately
6% energy during a heating season. As opposed to common belief,
keeping a at warm requires more energy than heating it up. (When
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