Priming Pump - Riello BG6.1D Instrucciones De Instalación, Montaje Y Funcionamiento

The installer must ensure that the supply de-
pression never exceeds 0.4 bar (30cm Hg).
Above that level, gas leaks out from the fuel.
WARNING
The pipes must all be perfectly sealed.
In the systems in Fig. 13 and Fig. 14, the table shows the maxi-
mum approximate lengths for the supply line, depending on the
difference in level, length, and the diameter of the fuel conduit.
6.4.1

Priming pump

In the systems of Fig. 13 and Fig. 14, it is necessary to start up
the burner and wait for priming.
Should lockout occur prior to the arrival of the fuel, await at least
20 seconds before repeating the operation.
In two-pipe vacuum systems (Fig. 14), you are advised to bring
the return line to the same height as the suction line. In this case
a non-return valve is not required.
Should however the return line arrive over the fuel level, a non-
return valve is required.
This solution however is less safe than previous one, due to the
possibility of leakage of the valve.
Hydraulic system
15
GB
20015403