Installation manual

Coopra Advanced Heating Technologies Installation manual 40 EN
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6.12. Flue sensor
Switching the supply voltage on makes the flue sensor active.
If the flue sensor measures a temperature below –25°C, the
regulation locks with the message flue sensor interruption (‘4’).
Low load:
If the flue gas temperature goes above 80°C, the burner is
limited to low load.
If the flue gas temperature goes below 70°C, the blocking
actions will be automatically removed.
The display shows continuous ‘A’:
If the flue gas temperature goes above 90°C, the regulation
blocks with continuous ‘A’.
If the flue gas temperature goes below 70°C, the blocking
actions will be automatically removed.
The display shows flashing ‘A’:
If the flue gas temperature goes above 95°C, the regulation runs
into lock-out with flashing ‘A’.
6.13. Frost protection
If the flow sensor temperature is below 8 °C ( and if there is no
heat demand) the pump runs into the heating mode and the
display shows ‘o’.
If the flow temperature goes below 3 °C, the regulation starts the
burner to low load.
When the return sensor temperature is above 15 °C, the frost
protection is finished.
When an external sensor is connected and the outside
temperature is below –4 °C, the pump runs into the heating
mode. This situation is removed at an outside temperature of –2
°C.
6.14. Glow plug protection
The glow plug protection counter is incremented at each ignition.
This counter is decremented per minute.
If this counter is too high, to protect the glow plug for overheating
by to many start attempts repeatedly, the boiler start is delayed.