pag.10
B
LB752
Minor 4.1/8.1/12.1 - R
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 by the same care. Note: Always check the position of electrodes after having
replaced the nozzle (see illustration). A wrong position could cause ignition troubles.
NOZZLE CLEANING AND REPLACEMENT
3 mm
5/6 mm
2
÷
3 mm
3
2
1
1
1 - HOSE
2 - OIL FILTER
3 - OIL COCK
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 consequent, 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 bur-
ner. 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
6
1
2
3
4
5
3
3
SUNTEC
AS 47 K
1 -
INLET
2 -
RETURN
3 -
BLEED AND PRESSURE GAUGE PORT
4 -
VACUUM GAUGE PORT
5 -
PRESSURE ADJUSTMENT
6 -
TO NOZZLE
7 - CARTRIDGE FILTER
2
1
4
5
6
P
-
+
V
P
3
7
DANFOSS BFP 21 R3
3
2
1
1
