Riello RG3 Installation, Use And Maintenance Instructions page 45

4.3 ELECTRODES ADJUSTMENTS,
ATTENTION
Lean the diffuser disc-holder assembly (1) on the nozzle-holder (2) and lock it by screw (3).
For prospective adjustments loosen screw (4) and move the electrodes assembly (5).
To have access to the electrodes
carry out operation as described in
chapter "4.2 RECOMMENDED
NOZZLES" (page 6).
4.4 PUMP PRESSURE
The pump leaves the factory set at 12 bar.
To change it act on pump pressure adjust screw (4, fig. 6, page 4).
4.5 COMBUSTION HEAD SETTING,
It depends on the output of the burner and is carried out by rotating clockwise or counterclockwise the setting
screw (5) until the set-point marked on the regulating rod (9) is level with the outside plane of the nozzle-holder
assembly (1).
➤ In the sketch the combustion head is set for an output of 2.25 GPH at 12 bar.
The set-point 3 of the regulating rod (9) is at the same level with the outside plane of the nozzle-holder assem-
bly (1) as shown in the schedule.
4.6 AIR DAMPER ADJUSTMENT,
➤ To vary the setting adjust the screw (7) after loosing the nut (8).
When burner shuts down the air damper automatically closes till a max. chimney depressure of 0.5 mbar.
➤
4.7 BURNER START-UP CYCLE
Normal
Thermostat
Motor
Ignition transformer
Valve
Flame
Lock-out lamp
C
Lock out is indicated by a lamp on the control box (3, fig. 1, page 1).
(see fig. 12)
Fig. 12
(see fig. 11, page 6)
(see fig. 11, page 6)
~
12s
WARNING
MEASURES MUST BE
RESPECTED
0
4.5
– 0.5 mm
4
5
3
Lock-out due to failure to light
~
12s
7 GB
–
6 7
mm
2 1
5 s
D5085
C
D5029
1915