Riello RLS 300/E MX, Installation, Use And Maintenance Instructions

Page: 34 / 60

20009654
32 GB
Start-up, calibration and operation of the burner
6.5 Fuel change
There are three possible options for changing fuel:
1
with AZL device;
2 using selector 3) (Fig. 34);
3 using a remote selector connected to the main terminal
board.
The AZL device determines the priority fuel. The fuel selected is
shown on the display.
By setting selector 3) (Fig. 34) to EXT, you activate the remote
fuel selection facility.
In this position, if no remote selector is fitted, the display shows
the priority fuel.
6.6 Combustion air adjustment
Fuel/combustion air must be synchronized with the relevant ser-
vomotors (air and gas) by storing a setting curve by means of the
electronic cam.
To reduce pressure loss and to have a wider adjustment range,
it is best to set the servomotors to the maximum output used, as
near to maximum opening (90°) as possible.
On the gas butterfly valve, the fuel’s partial setting adjustment
based on required output, with the servomotor fully open, is made
by using the pressure stabilizer on the gas train.
6.6.1 Air adjustment for maximum output
Set the servomotor to maximum opening (near 90°) so that the air
butterfly valves are fully open.
Loosen screw 2) (Fig. 35) under the burner’s intake and close
grille 1) (Fig. 35) progressively until you achieve the required out-
put.
The only time reducing intake to a partial setting is not necessary
is when the burner is working at the top of the operating range
given on pag. 10.
The value reported in the table can be a reference for a good
combustion setting.
WARNING
We recommend you achieve the maximum output
required manually, and adjust intake to the partial
setting, define gas pressure and adjust the com-
bustion head before completing the setting.
Fig. 35
D3094
EN 676
Excess air
Max output
 
1.2
Min output
 
1.3
GAS
Theoretical max.
CO
2
0 % O
2
Calibration CO
2
%
CO
mg/kWh

= 1.2

= 1.3
G 20 11.7 9.7 9.0

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
Excess air
Max output
 
1.2
Min output
 
1.3
Theoretical max. CO
2
0 % O
2
Calibration CO
2
%
CO
mg/kWh

= 1.2

= 1.3
15.2 12.6 11.5

100