Riello 1311 T2, Modulating Operation, Page: 38 / 60

20040170
36
GB
Maintenance
Nozzles
It is advisable to replace nozzles once a year during periodical
maintenance.
Do not clean the nozzle openings;
Hoses
Check that these are in good conditions.
Fuel tank
Approximately every 5 years, suck any water on the bottom of the
tank using a separate pump.
Combustion
If the combustion values found at the start of the intervention do
not satisfy current standards or anyway indicate a poor state of
combustion (consult the table below), contact the Technical As-
sistance Service for the necessary adjustments.
Tab. N
Gas leaks
Make sure that there are no gas leaks on the pipework between
the gas meter and the burner.
Gas filter
Change the gas filter when it is dirty.
Combustion
If the combustion values found at the start of the intervention do
not satisfy current standards or anyway indicate a poor state of
combustion (consult the table below), contact the Technical As-
sistance Service for the necessary adjustments.
Tab. O
EN 267
Air excess
CO
Max. output
 
1.2
Min. output
 
1.3
Theoretical max. CO
2
0 % O
2
CO
2
% Calibration
mg/kWh
 = 1.2  = 1.3
15.2 12.6 11.5

1000
1
2
Fig. 38
D11319
GAS OPERATION
EN 676
Air excess
CO
Max. output
  1.2
Max. output
  1.3
GAS
Theoretical
max. CO
2
0 % O
2
CO
2
% Calibration
mg/kWh
 = 1.2
 = 1.3
G 20 11.7 9.7 9

1000
G 25 11.5 9.5 8.8

1000
G 30 14.0 11.6 10.7

1000
G 31 13.7 11.4 10.5

1000