If the water temperature is lower than 7°C, the pump switches on.
If the water temperature is lower than 4°C, the boiler switches on.
If the water temperature is higher than 10℃, the boiler shuts down and
the pump continues to run for a short time.
To prevent the system and radiators freezing in frost-sensitive areas (e.g.
a garage), a frost thermostat or, if feasible, an outside sensor can be
connected to the boiler.
8 Operation
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