60
2. MAINTENANCE
SER
VICE
CENTRE
2.2.14. GAS CONVERSION
ATTENTION
Make sure that the gas adduction tube is
suitable for the new type of fuel with which the boiler
is supplied.
› loosen the two screws ‘1’ (fig.1) from the
fastening bush, and remove the air suction tube;
› unscrew the tube coupling that connects the
gas valve to venturi;
› unscrew the three fastening screws ‘2’ (fig.1) of
the venturi ‘V’ (fig.1) using a 10 key, as shown in
figure 2;
› remove the two screws ‘3’ (fig.3) and apply
pressure on the rear side of venturi ‘C’ (fig.3);
› replace the body venturi with the one suitable
for the type of supply gas (cod. 30-00225 for
Natural gas / cod. 30-00226 for Universal LPG)
and make sure the tooth ‘D’ (fig.3) is adjusted
downwards on the aluminium ring nut (see
fig.3);
› remount the components following the
demounting operations in reverse making sure
that gasket ‘G’ is re-assembled as shown in fig.1;
› set the boiler to operate with the new type of
gas, changing the value of the parameter P02
‘GAS TYPE SELECTION’ from the control panel
(see chapters ‘DIGITECH CS PARAMETERS
TABLE’ and ‘ACCESSING AND PROGRAMMING
THE PARAMETERS’);
› adjust the CO2 combustion value as indicated in
chapter ‘CO2 VALUE CHECK AND CALIBRATION’.
2
2
V
2
G
1
3
3
D
C
C
fig. 1
fig. 2
fig. 3
