• Fill the trap (see cap. 2.7 "Condensate drain connection").
IF THE ABOVE INSTRUCTIONS ARE NOT OBSERVED
B
THERE MAY BE RISK OF SUFFOCATION OR POISO-
NING DUE TO GAS OR FUMES ESCAPING; DANGER
OF FIRE OR EXPLOSION. ALSO, THERE MAY BE A
RISK OF ELECTRIC SHOCK OR FLOODING THE
ROOM.
First boiler ignition
• Make sure there is no draw-off of hot water and room thermostat requests.
• Turn on the gas and check that the gas supply pressure ahead of the unit complies with the
technical data table or in any case the tolerance provided for by the regulations.
• Power the boiler electrically, the FW and software version number appear on the display. Then
the message "boiler start" appears with the timers indicating the progress of deaeration (see
cap. 1.3 "Connection to the power supply, switching on and off" on page 165).
• At the end of the FH cycle, the display will show the winter mode screen, make the temperature
adjustments: heating flow and DHW outlet (fig. 7 and fig. 6).
• Check if the flue parameter value ("Combustion Control Menu" on page 193) is suitable for the
length of flue installed.
• In case of gas change (G20 - G30 - G31), check if the relevant parameter is suitable for the
type of gas present in the supply system ("Combustion Control Menu" on page 193 and
cap. 3.1 "Adjustments" on page 185).
• Set the boiler to DHW or heating mode (see cap. 1.3 "Connection to the power supply,
switching on and off" on page 165).
• In heating mode, do a request: the current heating system temperature is shown on the display;
when the flashing flame symbol appears it means that the burner is on and the system is cali-
brating. Wait for the end of calibration, indicated by the steady flame symbol.
• DHW mode with hot water draw-off present: the current DHW temperature is shown on the di-
splay; when the flashing flame symbol appears it means that the burner is on and the system
is calibrating; wait for the end of the calibration which will be indicated with the steady flame
symbol.
• Carry out the fuel check as described in par. "Checking the combustion values" on page 187.
3.3 Maintenance
IMPORTANT
ALL MAINTENANCE WORK AND REPLACEMENTS
B
MUST BE CARRIED OUT BY SKILLED QUALIFIED
PERSONNEL.
Before carrying out any operation inside the boiler, di-
sconnect the power and close the gas cock upstream.
Otherwise there may be a danger of explosion,
electric shock, suffocation or poisoning.
196
cod. 3541V280 - Rev. 00 - 03/2021
RAGGIO C
EN