Burner Start-Up Cycle - Riello PRESS 450 T/N Installation, Use And Maintenance Instructions

4.7

BURNER START-UP CYCLE

Thermostat
Motor
Ignition transformer
Pre-purge
st
1 flame valve
nd
2 flame valve
rd
3 flame valve
Lock-out lamp
(t ) Factory setting: 20 s.
x
This time determines the heavy oil tempera-
ture at ignition. It can be adjusted, accord-
ing to the fuel's viscosity, by the timer 21)
(Fig. 1).
The adjacent diagram shows the suggest-
ed settings.
t max = 60 s
x
Motor lock-out
It is caused by the over load relay when overload
occurs or no current supply.
NB.: Periodically clean the filter of the pre-heater
tank.
4.8 THREE STAGE OPERATION
rd
3 stage max.
nd
2 stage
st
1 stage
0
5845
Normal Lock-out because no ignition
12 GB
D2848
D3211
Viscosity at 50°C (°E)
D2749