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B
LB752 Minor 4.1/8.1/12.1 - R
SUNTEC
AS 47 K
3
6
3
1
2
- 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.
1
1
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.
2 ÷ 3 mm
PRIMING AND ADJUSTMENT OF OIL PUMP
DANFOSS BFP 21 R3
4
7
5
5
P
-
+
3
2
2
3
NOZZLE CLEANING AND REPLACEMENT
3 mm
5/6 mm
1 -
2 -
3 -
4 -
5 -
6 -
6
7 - CARTRIDGE FILTER
P
3
VERIFY:
4
V
- 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
1
bar, to avoid pump's cavitation;
1 - HOSE
2 - OIL FILTER
3 - OIL COCK
1
2
1
pag.10
INLET
RETURN
BLEED AND PRESSURE GAUGE PORT
VACUUM GAUGE PORT
PRESSURE ADJUSTMENT
TO NOZZLE
3
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