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7.3.3 Low temperature warning
If temperature of the system decreases to T≤4 °C, the boiler
continues to work normally, but measuring temperature
indicator starts to flash slowly (image 21). It is necessary to
increase temperature to T≥5 °C in order to stop automatic
flashing of warning indicator.
Image 21: Warning- Temperature near restricted low
temperature
WARNING! If heating system is out of function
the freezing can occur
It is mandatory to secure the system
Empty the entire installation
If temperature of the system decreases to T≤2 °C, all heaters
and pump will turn off (delays for 2 min), and temperature
measuring indicator will flash quickly (image 22). With this
temperature value there is danger of freezing and boiler
damage, so the work of this device will be blocked. To continue
with boiler work it is necessary to increase temperature up to
T≥5°C.
Image 22: Blocked work of the boiler foe to danger of
freezing
Present temperature displayed on the screen is possible for
values T≥-9°C. Temperature below -9°C is not possible to be
displayed on the screen so the code EL will appear on display
meaning the temperature is below -9°C, or temperature
sensor is in circuit break (image
WARNING: Material damage due to
freezing
Image 23: Temperature below -9 °C or sensor circuit break
Heating installation handling
23).
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