7
20013749
GB
ELECTRODE SETTING
START-UP CYCLE
ADJUSTMENTS, TO AVOID FLAME - DETACHMENT, AT BURNER IGNITION
This inconvenience can occur, when the temperature of the light oil decreases below + 8 °C.
1) CORRECT POSITIONING OF THE ELECTRODES,
(see fig. 8).
2) NOZZLE: ATOMIZING CONE
Choose empt ies or semi-empt ies cones.
For exemple: Delavan type A - E; Steinen type H; Danfoss type H.
3) PUMP - SETTING
The pump is factory set, at a pressure of 12 bar.
When the temperature of the gas-oil decreases below + 8 °C, increase the pressure to 14 bar.
4) COMBUSTION-HEAD SETTING
Regulate the combustion-head one set-point further ahead than indicated in the instructions.
Example: the instructions require to set the combustion-head on set-point 2.
Instead, the setting is made on set-point 3.
5) FAN - AIR DAMPER ADJUSTMENT
Adjust the damper, reducing the excess air until the Bacharach number is not near 1.
(i.e. a combustion with the lowest possible excess-air).
IMPORTANT:
THESE DIMENSIONS MUST BE
OBSERVED
Attention:
Before assembling or removing the
nozzle, loosen the screw (A) and
move the electrodes ahead
2 – 2.5
mm
4 ±
0.3 mm
D5230
A
Fig. 8
Normal
Lock-out, due to light-failure
Thermostat
Motor
Ignition transformer
Valve
Flame
Lock-out lamp
~
12 s
D5229
~
12 s
~
5s
