This function is not default.
It can be activated, after setting value in installer mode.
Function to set whether or not to use a installed 3rd party boiler function.
If the mode of this function is set to “Auto”, you can set the activation temperature of the boiler and hysteresis, respectively.
As shown above, After every setting is completed in installer mode, 3rd party boiler option is activated in function list.
On/off mode of this option are opened by pushing "L" or "M" button simply and easily.