Riello G20D, Installation, Use And Maintenance Instructions

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21
2903397
GB
Start-up, calibration and operation of the burner
8.6 Pump pressure and air output
The burner is provided with an hydraulic device controlled by the
electronic start delaying device which reduces to approx. 70%
the max. output of fuel and air.
8.6.1 1
st
stage adjustment
Adjustment of air shutter
Place the small plug 9)(Fig. 21) of the electronic start delaying
device 10) into the position
I
(Item A, Fig. 22).
In this way the burner will remain permanently in the 1
st
stage.
Unloosen the nut 2)(Fig. 23), turn the screw 3) until the air
shutter 1) reaches the position desired.
Then lock the nut 2).
Pressure regulation
This is set at 7 bar at the factory.
Should such pressure be reset or changed, just turn the screw
4)(Fig. 21).
The pressure gauge must be mounted in place of cap 5).
8.6.2 2
nd
stage adjustment
Adjustment of air shutter
Place the small plug 9)(Fig. 21) of the electronic start delaying
device 10) into the position
II
(Item B, Fig. 22).
In this way the burner remains permanently in the 2
nd
stage.
Unloosen the nut 6)(Fig. 23), turn the screw 7) until the air
shutter 1) reaches the position desired.
Then lock the nut 6).
Pressure regulation
This is set at 10 bar at the factory.
Should such pressure be reset or changed, just turn the screw
8)(Fig. 21).
The pressure gauge must be mounted in place of cap 5).
8.7 Electrode setting
Before removing or assembling the nozzle, loosen the screw
A)(Fig. 24) and move the electrodes ahead.
Fig. 21
S7354
Fig. 22
II - I
II
I II - I
II
I
Item A Item B
9 9
Fig. 23
S7353
WARNING
The position of the electrodes cannot be regulat-
ed. In case of failure, check that the measure-
ments as shown on the figure are respected.
Fig. 24
4
±
0.3 mm
D5288
A
4.5
±
0.5 mm
Move the electrode holder
backwards to the end