EB 5573 EN
87
System-wide functions
8
System-wide functions
8.1
Automatic summer/standard time switchover
The time is automatically changed on the last Sunday in March at 2.00 h and on the last
Sunday in October at 3.00 h.
Functions
WE
Configuration
Summer time
1
CO5 > F08 - 1
8.2
Frost protection
Frost protection measures are taken when the outdoor temperature falls below 'Frost protec-
tion limit'. The switching differential to cancel the frost protection measures is always 1 °C.
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 heat-
ing circuits. Nevertheless, the storage tank is always recharged to 10 °C if the storage tank
temperature falls below 5 °C.
Frost protection program II:
The heating circuit circulation pumps are always switched on automatically. The flow tem-
perature 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
3.0 °C
CO5 > F09 - 0
Frost protection limit: –15 to +3.0 °C
Frost protection program II
3.0 °C
CO5 > F09 - 1
Frost protection limit: –15 to +3.0 °C