Electrodes Setting; Fuel Heating; Operation Programme - Riello RDB1R GRANT MILTON 20 kW Installation, Use And Maintenance Instructions

7.6

Electrodes setting

Before removing or assembling the nozzle, loosen the screw B)
(Fig. 19) and move the electrodes ahead.
7.7

Fuel heating

In order to obtain smooth starting and operation across its output
range the burner is fitted with an electric resistance, which heats
up the light oil in the nozzle line.
This resistance is energized when the thermostat calls for heat
and after a delay of approximately two minutes depending on
room temperature, the motor will start.
7.8

Operation programme

Normal
Thermostat
Resistance
Motor
Ignition transformer
Valve
Flame
Lock-out lamp
Lock out is indicated by a lamp on the control box
5) Fig. 1 to page 6
WARNING
4 ±
0.3 mm
D5230
0 - 150s ~12s
Operation
The measures in Fig. 19 must be respected.
WARNING
B
2 - 2.5 mm
The resistance remains energised during working and cuts out
when burner shuts-down.
Lock-out due to failure to light
0 - 150s
17 GB
~12s
~5s
Fig. 19
D5329
Fig. 20
20166849