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System-wide functions
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.
Function
Summer time/winter time changeover
7.2
Frost protection
Frost protection measures are taken when the outdoor temperature falls below the Frost protec-
tion 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. Nevertheless, 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 au-
tomatically. 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
Frost protection program I
Frost protection program II
NOTICE
Frost protection operation of a pump, a heating circuit or the DHW circuit is only active when
the frost protection icon
In the stand-by mode ( ) fixed set point control without outdoor temperature sensor does not in-
clude frost protection.
70
EB 5573 EN
WE
Configuration
1
CO5 -> F08 - 1
WE
Configuration
CO5 -> F09 - 0
3.0 °C
Frost protection limit / –15.0 to 3.0 °C
CO5 -> F09 - 1
3.0 °C
Frost protection limit / –15.0 to 3.0 °C
appears on the display.
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