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6.6 HEATING MODULATION FEATURE
The advanced control board on the boiler will automatically modulate the heating output to the demand required to save
energy.
This function works by the boiler 'learning' and anticipating the time taken to reach the temperature level demanded by the
external thermostatic control. The power output is automatically adjusted therefore reducing power consumption on
warmer days or when another heat source is present.
An external 'volt free' control must be fitted across the terminals marked 'TA' on the PCB and the 'bridge' removed for this
function to be activated.
This feature can be disabled using parameter P08. See "6.5 USER PARAMETERS".
6.7 AUTO HEATING REGULATION.
It is possible to regulate the temperature at which the boiler drives the water heating circuit depending on the outdoors
temperature. This method of regulation provides maximum comfort as it anticipates changes in the thermal needs of the
house. The room thermostat continues to regulate the temperature inside the house.
To activate this mode of heating, the installer will need to connect an external temperature sensor (not supplied) and
activate the P05 and P11 parameters.
There are four parameters that define this function.
TIMAX.
Maximum water flow temperature in AUTO heating mode.
In the above example TIMAX=80ºC.
TIMIN.
Minimum water flow temperature in AUTO heating mode.
In the above example TIMIN=20ºC.
TEMAX.
Outdoor temperature from which the water flow temperature will be TIMIN.
In the above example TEMAX=15ºC.
TEMIN.
Outdoor temperature below which the water flow temperature will be TIMAX.
In the above example TEMIN=2ºC.
On the coldest days, the water will be driven at higher temperatures and vice versa on the hottest days-less water will be
driven at a lower temperature. In the example we see how, if the outdoors temperature is of 5ºC the water flow
temperature heating circuit would be about 66 °C.
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