Clas ONE User Manual
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USER’S MANUAL
The boiler allows the ‘comfort’ level for the output of domestic
hot water to be increased through the “COMFORT” function. This
function keeps the secondary exchanger (or an external tank)
warm during the periods in which the boiler is inactive, thereby
bringing the initial thermal condition of the water drawn to a
higher temperature.
This function may be enabled by pressing the COMFORT button 4.
When the function is enabled the text COMFORT appears on the
display..
Auto button - Temperature adjustment activation
The AUTO function enables boiler operation to be adapted to
environmental conditions and to the type of system it is installed
on.
Comfortable temperature is reached inside the room in the
quickest way possible, without wasting money, energy or
eciency, while substantially reducing the amount of wear
experienced by the components.
Your installer will advise you on the devices connectable
to the boiler and will program it according to the system.
In normal boilers the water temperature inside the heating
elements is usually set to a high value (70-80°C), thereby ensuring
eective heating during the few really cold winter days. It then
becomes excessive on less cold days (of which there are many)
more typical of the autumn and winter seasons. This leads to
excessive room heating after the thermostat has been switched
o, resulting in energy waste and uncomfortable conditions
inside the room.
The AUTO function “takes control” of the boiler and selects
the best operating regime based on environmental conditions,
external devices connected to the boiler and the performance
required. It constantly decides at which power level to
operate based on the environmental conditions and the room
temperature required.