1) Remove the cap A of the pres-
sure regulating valve TV.
2) Loosen the fixing nut B and
use an allen wrench on the screw
C to adjust the delivery oil pres-
sure. To increase the pressure
turn clockwise, to decrease the
pressure turn anticlockwise.
3) Tighten the nut B and pay
attention not to turn also the
adjusting screw.
4) Screw on the cap A, back to
its previous position.
pag.8
techniques for energy saving
LB1360
MULTICALOR 700.1÷1200.1 MD
SUNTEC T.......
PRIMING AND ADJUSTMENT OF OIL PUMP
1 - INLET
2 - RETURN
3 - BLEED AND PRESSURE GAUGE PORT
4 - VACUUM GAUGE PORT
5 -
6 - TO NOZZLE
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 pri-
ming. 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 bur-
ner 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: befo-
re starting the burner, check that the return pipe is open. An eventual obstruction could damage the pump
sealing device.
1
2
6
3
4
PRESSURE REGULATING VALVE ADJUSTMENT
A
B
C
B
A
