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When the collector temperature exceeds the adjust-
able Antifreeze switch-off temperature, the function
is switched off.
Heat will be extracted from the stores according to
the adjusted order. When all stores have reached their
minimum temperature of 5 °C, the function becomes
inactive.
If the function is active, the pump runs at its maximum
relative speed.
In systems with east- / west collectors 2 separate
menus will be displayed.
Antifreeze function
Adjustment channel
Description
Adjustment range / selection
Factory setting
Frost on
Antifreeze switch-on temperature
-40 … +15 °C
+4 °C
Frost off
Antifreeze switch-off temperature
-39 … +16 °C
+6 °C
Collector
Collector fi eld
system dependent
system dependent
Store (1,2)
Store succession order
system dependent
system dependent
Funct.
Activation / Deactivation
Activ. / Deactivated
Activated
Solar / opt. functions / Add new function / Antifreeze
The afterheating suppression can directly control the
"boiler blocking" input of a heat generator. If Arrange-
ment / Opt. functions / AH suppress. has been activated,
the afterheating suppression can also directly control
the afterheating (= heating demand) of the controller.
In order to do so, select the virtual relay "Demand" in
the Arrangement / Opt. functions / AH suppress. / Relay
channel. The afterheating will then only demand heat
from the boiler when the store temperature falls be-
low the switch-on temperature and the store is not
being loaded by solar loading.
When the Stset option is activated and the store tem-
perature falls below the value adjusted for Stset in the
Solar / Basic settings / Store menu, the AH suppress.
relay will be deactivated. Thus, the parameter Stset
forms the lower comfort limit.
Afterheating suppression
Adjustment channel
Description
Adjustment range / selection
Factory setting
Relay
Reference relay
system dependent
system dependent
Store
Store selection
system dependent
system dependent
Stset
Set temperature
Yes, No
No
Funct.
Activation / Deactivation
Activ. / Deactivated
Activated
Solar / opt. functions / Add new function / AH suppress.
The Antifreeze function activates the system when
the collector temperature falls below the adjusted
Antifreeze switch-on temperature. This will protect
the fl uid against freezing or coagulating.
The Afterheating suppression blocks the conventional
afterheating of a store that is currently in solar load-
ing.
This function is activated if a previously selected
Store
is being loaded by solar heat.
Solar loading means that store loading is only carried
out for energy supply and not for cooling purposes
etc.
