Burner Start-Up Cycle; Maintenance - Riello GRG4S Manuel D'entretien

HIGH-FLAME SETTING, (see fig. 14, page 7)
AIR-DAMPER ADJUSTMENT
Loosen the nut (3), turn the screw (1), until the indicator (2) is in the required position.
Then, lock the nut (3).
PUMP-ADJUSTMENT
This is set at 12 bar at the factory.
The pressure gauge must be mounted in place of plug (4, fig. 8, page 4).
Should it be necessary to re-set or alter such pressure, this can be done, by adjusting screw (5, fig. 8, page 4).
When burner shuts down the air damper automatically closes till a max. chimney depressure of 0.5 mbar.

4.6 BURNER START-UP CYCLE

Normal
Thermostat
Motor
Ignition transformer
Valve
Low-flame
High-flame
Lock-out lamp
B
Lock out is indicated by a lamp on the control box (3, fig. 1, page 1).
5.

MAINTENANCE

Burner requires a periodic maintenance carried out by a qualified and authorized technicians.
Maintenance is essential for the reliability of the burner, avoiding the excessive consumption of fuel and
consequent pollution.
Before carrying out any cleaning or control always first switch off the electrical supply to the
burner acting on the main switch of the system.
THE BASIC CHECKS ARE:
Check that there are not obstructions or dents in the supply or return oil pipes.
Clean the filter in the oil suction line and in the pump.
Clean the
photoresistance,
Check for correct fuel consumption.
Replace the nozzle (see fig. 12, page 6) and check the correct position of electrodes (fig. 13, page 7).
Clean the combustion head in the fuel exit area, on the diffuser disc.
Leave the burner working without interruptions for 10 min. and set rightly all the components stated in
this manual. Then carry out a combustion check verifying:
Smoke temperature at the chimney;
Smoke value according to opacity smokes index according to Bacharach scale.
1916
~
12s 3 ÷ 9 s
(7, fig. 1, page 1).
Lock-out due to failure to light
~
Content of CO ( % );
2
8
GB
12s 5 s
Content of CO (ppm);
B
D5544