7 System-wide functions
7.1 Automatic summer time/winter time changeover
The clock is automatically adjusted on the last Sunday in March at 2.00h and on the last
Sunday in October at 3.00h.
Functions
WE Configuration
Summer time/winter time changeover 1 CO5 -> F08 - 1
7.2 Frost protection
Frost protection measures are taken when the outdoor temperature falls below the
Frost pro-
tection limit.
The switching differential to cancel the frost protection measures is always 1 °C.
4
Frost protection program I (restricted frost protection): frost protection measures are taken
only when all heating circuits in the system are in stand-by mode. The circulation pumps
are automatically switched on and their flow temperature set points are adjusted to
10 °C. The circulation pump in the DHW circuit is automatically switched on only when
the stand-by mode has been adjusted at the rotary switch in all heating circuits. Never-
theless, the storage tank is always recharged to 10 °C if the storage tank temperature
falls below 5 °C.
4
Frost protection program II: the heating circuit circulation pumps are always switched on
automatically. The flow temperature set points of all heating circuits currently in stand-by
mode are set to +10 °C. In the DHW circuit, the circulation pump is always activated. If
the storage tank temperature falls below +5 °C, the storage tank is recharged to +10 °C.
Functions
WE Configuration
Frost protection program I
3 °C
CO5 -> F09 - 0
Frost protection limit / –15 to 3 °C
Frost protection program II
3 °C
CO5 -> F09 - 1
Frost protection limit / –15 to 3 °C
Note: Frost protection operation of a pump, a heating circuit or the DHW circuit is only ac-
tive when the frost protection icon is indicated on the display.
Fixed set point control without outdoor temperature sensor does not include frost protection
monitoring in stand-by mode.
EB 5579 EN 95
System-wide functions
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