Steady State Operation; Firing Failure - Riello C9161400 Installation, Use And Maintenance Instructions

5.8.1

Steady state operation

At the end of the starting cycle, the servomotor control then passes
to load control for boiler pressure or temperature.
➤ If the temperature or pressure is low (and the load control is
consequently closed), the burner progressively increases out-
put up to MAX.
➤ If subsequently the temperature or pressure increases until
the load control opens, the burner progressively decreases
output down to MIN.
➤ The burner shuts off when demand for heat is less than the
heat supplied by the burner in the MIN output.
➤ The servomotor returns to the 0° angle. The air damper closes
completely to reduce thermal dispersion to a minimum.
Every time output is changed, the servomotor automatically modi-
fies oil delivery (pressure regulator) and air delivery (fan damper).
5.8.2

Firing failure

➤ If the burner does not fire, it goes into lock-out within 5 sec. of
the opening of the light oil valve.
➤ If the flame should go out for accidental reasons during opera-
tion, the burner will lock out in 1 s.
Start-up, calibration and operation of the burner
47 GB
20037168