Combustion Head Adjustment; Air Damper Adjustment; Burner Start-Up Cycle - Riello 40 G7 Installation, Use And Maintenance Instructions

8.4

Combustion head adjustment

This is done when fitting the nozzle, with the blast tube removed.
It depends on the output of the burner and is carried out by rotat-
ing the regulating rod, till the terminal plane of the blast tube is
level with the set-point, as indicated in the Tab. G on page 21.
Example:
The combustion head is set for an output of:
– 1.00 GPH at 12 bar (for gas oil)
– or 1.25 GPH at 8 bar (or kerosene).
The shutter is level with set-point 3 (Fig. 19), as required in
Tab. G on page 21.
Combustion head settings indicated in the Tab. G are valid for
most cases.
The setting of the fan output according to the installation should
normally be done only through the air damper.
8.5

Air damper adjustment

The regulation of the air-rate is made by adjusting the air
damper 1)(Fig. 20), after loosing the screws 2).
The settings indicated in the Tab. G on page 21 refer to the burn-
er with its metal cover fitted and the combustion chamber with
"zero" depression.
These regulations are purely indicative.
Each installation however, has its own unpredictable working
conditions: actual nozzle output; positive or negative pressure in
the combustion-chamber, the need of excess air, etc.
All these conditions may require a different air-damper setting.
It is important to take account of the fact that the
air output of the fan differs according to whether
the burner has its metal cover fitted or not.
WARNING
Therefore we recommended to proceed as follows:
 adjust the air damper as indicated in the Tab. G;
 mount the cover, simply by means of the upper screw;
 check smoke number;
 should it become necessary to modify the air output,
remove the cover by loosening the screw, adjust the air
damper, remount the cover and finally recheck the smoke
number.
8.6

Burner start-up cycle

Normal
Thermostat
Motor
Ignition transformer
Valve
Flame
Lock-out lamp
Every 2000 working hours, verify the wear of the
brushes and the motor manifold.
WARNING
20032189
Start-up, calibration and operation of the burner
~ 6s
D6106
2
Lock-out due to failure to light
~ 6s
22 GB
Terminal plane of the blast tube
Shutter
2
5 3 1
Regulating rod
Blast tube
D5514
~ 5s
Fig. 19
1
2
Fig. 20
D5229
Fig. 21