pag.23
LB972
MULTICALOR 300.1-400.1 PR/AB
B
VERIFY:
- That piping system is perfectly sealed;
- That the use of hoses is avoided whenever is possible (use copper pipes preferably);
- That depression is not greater than 0,45 bar, to avoid pump’s cavitation;
- That check valve is suitably designed for the duty;
The pump pressure is set at a value of 12 bar during the testing of burners. Before starting the burner, bleed the air in
the pump through the gauge port. Fill the piping with light-oil to facilitate the pump priming. Start the burner and
check the pump feeding pressure. In case the pump priming does not take place during the first prepurging, with a con-
sequent, subsequent lock-out of the burner, rearm the burner’s lock-out to restart, by pushing the button on the control
box. If, after a successful pump priming, the burner locks-out after the prepurging, due to a fuel pressure drop in the
pump, rearm the burner’s lock-out to restart the burner. Do never allow the pump working without oil for more than
three minutes. Note: before starting the burner, check that the return pipe is open. An eventual obstruction could
damage the pump sealing device.
PRIMING AND ADJUSTMENT OF OIL PUMP
1
2
5
6
3
4
1 - INLET
2 - RETURN
3 - BLEED AND PRESSURE GAUGE PORT
4 - VACUUM GAUGE PORT
5 - PRESSURE ADJUSTMENT
6 - TO NOZZLE
SUNTEC TA....C40105
POSITION OF IGNITION ELECTRODES
3 ÷ 4 mm
5 ÷ 6 mm
NOZZLE CLEANING AND REPLACEMENT
Use only the suitable box wrench provided for this operation to remove the nozzle, taking care to not damage
the electrodes. Fit the new nozzle with the same care.
Note: Always check the position of electrodes after having replaced the nozzle (see illustration). A wrong posi-
tion could cause ignition troubles.
