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3.3 Domestic Hot Water Operation
• Turn the DHW control knob to ON ( ) position. Sign “ ” will
appear and number on the screen will indicate set temperature of
sanitary water.
• When there is a call for hot water as a hot water tap is opened; the
boiler senses the flow to the taps and, if it is in stand-by, automatically
starts the ignition sequence.
“ ” sign will appear on the screen.
• The 3WV valve shuts down the heating system and the full boiler
power becomes available to meet the hot water demand.
• The domestic hot water sensor controls the heat input to maintain
the hot water at the temperature level selected by the user via the
domestic hot water control knob.
• A temperature range between 35°C and 60°C can be set.
3.4 Central Heating Operation
• Turn the DHW control knob to ON ( ) position. The LCD screen
will turn on with its blue light.
• Turn the central heating control knob ON position ( ). The system
pump will now run and the boiler control algorithm will start the auto-
matic ignition sequence. Set the heating temperature control to the
desired level. A temperature adjustment is possible between 30°C
and 80°C.
The boiler control algorithm will now maintain the set temperature,
modulating the heat input to match the heating load. When the de-
sired water temperature is reached and read by the sensor, the boiler
will shut down. The system pump will continue to run to dissipate the
heat from the boiler.
In Summer:
When there is no call for heating but only for hot water, e.g., in summer,
turn the CH control knob to the OFF position, but leave the DHW control
knob in the ON ( ) position.
