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1.18 Weather Compensation Operation
The Weather Compensation operates on the central heating system when the Outdoor Sensor
has been connected by the installer.
Depending on the outdoor temperature, the CH flow temperature is automatically reduced
below the user CH setpoint.
The amount of reduction depends on the Weather Compensation Coefficient (Parameter ‘u 00’).
A lower value of Parameter ‘u 00’ results in a greater reduction of the CH flow temperature at a
given outdoor temperature.
A higher value of Parameter ‘u 00’ results in a smaller reduction of the CH flow temperature at a
given outdoor temperature.
Parameter ‘u 00’ is adjustable from 0 to 30.
The maximum setting value of 30 means that weather compensation is not active when the
outdoor temperature is less than 5°C, however the CH setpoint will be reduced the higher the
outdoor temperature rises above 5°C.
A value of 20 means that weather compensation is not active when the outdoor temperature is
less than -6°C, however the CH setpoint will be reduced the higher the outdoor temperature
rises above -6°C.
Care should be taken if using a value below 20 as these values produce very aggressive
reductions in the CH setpoint.
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