47
commissioning
First ignition
1. Make sure that:
- The gas valve is closed;
- The electrical connection has been properly
carried out. Make sure that, in any case, the
green/yellow earthing wire is connected to
an effi
cient earthing system;
- Use a screwdriver to lift the cap on the
automatic air relief valve;
- the system pressure reading is greater than
1 bar on the pressure gauge;
- Press the
button; the green LED
2
will light up. Turn the heating knob
4
between the min. and max. positions.
The boiler pump will start up and attempt
to ignite the burner. After 7 seconds the
electronics will shut off the appliance as the
gas supply has been interrupted; the LED
8
-
red
-
will light up.
- let the pump run until all the air has escaped
from the system;
- bleed the air from the radiators;
- check the system pressure and, if it has
decreased, fi ll the system with water until a
pressure of 1 bar is restored.
2. The exhaust duct for combustion products
should be suitable and free from any
obstructions;
3. Any necessary ventilation inlets in the room
should be open (type B installation).
4. Open the gas valve and check the connection
seals, including the boiler connection seals,
making sure that the meter does not detect
any passage of gas. Eliminate any leaks.
5. Reset the boiler by pressing the Reset
button
7
.
The burner ignites: if this does not happen
at the fi rst attempt, repeat the procedure
until ignition occurs.
Combustion Analysis
The fl
ue connector has two apertures,
readings can be taken for the temperature
of the combustion by-products and of the
combustion air, as well as of the concentrations
of O2 and CO2, etc.
To access these intakes it is necessary to
unscrew the front screw and remove the metal
plate with sealing gasket.
The optimal test conditions at maximum
heating power are achieved when the chimney
sweep function is enabled (press the Reset
button for 5 seconds; the green LED
2
will
begin to fl ash). The boiler will automatically
revert to normal operating conditions after 10
minutes, or if you switch the boiler OFF and ON
again.When you have fi nished, reposition the
metal plate correctly and make sure the seal
fi ts perfectly.
Product of Combustion
Discharge Monitoring
In the boiler, it is possible to monitor the
correct operation of the fl ue exhaust/air
intake, checking for a loss of general pressure
in the system. Through the use of a diff erential
manometer connected to the test points of the
combustion chamber, it is possible to detect
the ΔP of operation of the air pressure switch.
The value detected should not be less than 0.47
mbar (24 kW) under conditions of maximum
thermal power in order for the boiler to function
properly and without interruption.