Ferroli SUN G20 Mode D'emploi, Installation Et Entretien page 33

SUN G20
To perform a preliminary adjustment of head and air damper during installation (before commissioning
and consequently calibrating the appliance using instruments), use the graph below:
Adjusting pump pressure
- The recommended setting for 1st stage operation is from 8 to 10 bars.
- The recommended setting for 2nd stage operation is from 14 to 22 bars.
3.2 Commissioning
Checks to be performed on first ignition, and after all maintenance operations that involve the discon-
nection of the appliance from systems or intervention on the safety devices or parts of the burner:
Before igniting the burner
• Check that the burner is correctly fastened to the boiler, and the preliminary adjustments described
previously have been performed.
• Make sure that boiler and the system have been filled with water or diathermic oil, that the valves in
the water circuit are open and that the flue gas exhaust pipe is free and correctly sized.
• Check that the boiler door is closed, so that the flame only propagates inside the combustion cham-
ber.
• Fit the pressure gauge and the vacuometer to the pump (removed before operation).
• Open the gate valves in the oil pipes, making sure that there is fuel in the tank and that the return
pipe is not blocked.
Attention: Blockages may cause the pump seal device to break.
Cod. 35442633 - 01/2007 (Rev. 00)
33