1) Remove the cap A of the pressure
regulating valve TV.
2) Loosen the fixing nut B and use
an allen wrench on the screw C to
adjust the delivery oil pressure. To
increase the pressure turn clockwise,
to decrease the pressure turn anti-
clockwise.
3) Tighten the nut B and pay atten-
tion not to turn also the adjusting
screw.
4) Screw on the cap A, back to its
previous position.
PRESSURE REGULATING VALVE ADJUSTMENT
PRIMING AND ADJUSTMENT OF OIL PUMP
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 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.
1
4
3
6
5
2
SUNTEC T.......
1 - INLET
2 - RETURN
3 - BLEED AND PRESSURE GAUGE PORT
4 - VACUUM GAUGE PORT
5 - REGULATING VALVE TV
6 - TO NOZZLE
WARNING: For a correct working of the pump, verify what follows:
Pump :
SUNTEC T...C105
Oil temperature at the pump:
Max. 140 °C
Maximum allowable pressures:
Max. 5 bar on inlet
10
420010263301
GHO - TRON 7.15000 / 7.17000 R
EN
A
A
B
C
B
1
2
3
4
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