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Caution
This function causes energy to be lost via the collector! It is normally not activated
for solar systems with antifreeze.
Observe the operating instructions for the other system components!
If the seizing protection is activated, then the controller switches the relay in question and the
connected consumer on every day at 12:00 and on Sundays at 12:00 for 5 seconds in order to
prevent the pump and/or the valve from sticking after an extended stationary period.
A two-stage frost protection function can be activated. In stage 1 the controller switches the
pump on for 1 minute every hour if the collector temperature drops below the set value “Frost
stage 1”. If the collector temperature drops further to the set value “Frost stage 2” the controller
switches the pump on continuously. If the collector temperature then exceeds the value “Frost
stage 2” by 2 °C, then the pump switches off again.
5.4. - Frost protection
Protective functions
Protective functions
In hydraulic systems with solar when the recooling function is activated excess energy from
the storage tank is fed back into the collector. This only takes place if the temperature in the
storage tank is higher than the value “Recool Tsetpoint” and the collector is at least 20 °C cooler
than the storage tank and before the storage tank temperature has dropped below the value
“Recool Tsetpoint”. In systems with two storage tanks the setting applies to both storage
tanks.
Caution
Energy is lost via the collector when Recooling is active! Recooling
should only be active in periods with very little demand for heat e.g. dur-
ing longer absence / holidays.
5.5. - Seizing protection
If this temperature is exceeded at the collector sensor when the solar pump is on a
warning or error message is triggered. A warning message is shown in the display.
5.3. - Recooling
5.6. - Col.- Alarm