Riello GI/EMME 1400, Manual

Page: 33 / 80

31 20162463 GB
Start-up, calibration and operation of the burner
6.8 Combustion air adjustment
The fuel/combustion synchronization is made by means of a
servomotor connected to two variable profile cams, which act on
the outlet air damper and gas damper and on the combustion
head by appropriate levers.
It is advisable, to reduce the loss and for a wide calibration field,
to adjust the servomotor to the maximum of the output used, the
nearest possible to the maximum opening (130°).
On the gas butterfly valve, fuel step according to the burner
output required, with servomotor completely open, is carried out
by the pressure stabiliser placed on the train. The values indicated in Tab. M and Tab. N can be a reference for
a good combustion calibration.
Tab. M
Tab. N
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

100
G 25 11.5 9.5 8.8

100
G 30 14.0 11.6 10.7

100
G 31 13.7 11.4 10.5

100
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

100