pag.24
B
LB 1377
MULTICALOR 170.1 -200.1 PR / MD
ASPIRAZIONE
RITORNO
VgS
Vg
1
2
3
4
VG
VGS
7
6
5
LIGHT-OIL CIRCUIT
A - HOSE
B - OIL FILTER
C - OIL COCK
1 - PUMP
2 - SAFETY OIL VALVE
3 - OIL VALVE
4 - NOZZLE
5 - GAS PRESSURE SWITCH
6 - SAFETY GAS VALVE
7 - GAS VALVE
A
A
B
C
SUCTION
RETURN
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 22-25 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 fee-
ding 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
1 - INLET
2 - RETURN
3 - BLEED AND PRESSURE GAUGE PORT
4 - VACUUM GAUGE PORT
5 - PRESSURE ADJUSTMENT
6 - TO NOZZLE
6
5
3
2
SUNTEC
1
4
SUNTEC J7
