Riello DB 12 LSM C13 Installation, Use And Maintenance Instructions page 61

5.13.2 Priming pump (example)
Before starting the burner, make sure that the tank
return line is not clogged.
Obstructions in the line could cause the sealing
WARNING
organ located on the pump shaft to break.
➤ In order for self-priming to take place, the screw 4) on the
pump (Fig. 22) must be loosened to bleed off the air con-
tained in the suction line.
➤ Start the burner by closing the remote controls. As soon as
the burner starts, check the direction of rotation of the fan
blade.
➤ The pump can be considered to be primed when the light oil
starts coming out of the screw 4).
➤ Close the burner and undo the screws 4).
The time required for this operation depends upon the diameter
and length of the suction tubing.
If the pump fails to prime at first start-up and the burner locks out,
wait approx. 15 seconds, reset the burner, and then repeat the
start-up operation. And so on.
After 5 or 6 starting operations allow 2 or 3 minutes for the trans-
former to cool.
Do not light up the photocell or the burner will lock out; the burner
should lock out anyway about 10 seconds after it starts.
The above-mentioned operation is possible be-
cause the pump is already full of fuel when it
leaves the factory.
WARNING
If the pump has been drained, fill it with fuel
through the
3)(Fig. 22) prior to starting; otherwise, the pump
will seize.
Whenever the length of the suction piping ex-
ceeds 20-30 meters, the supply line must be filled
using a separate pump.
opening on the vacuometer
Installation
D11321
Key (Fig. 22)
1 Gas oil suction line
2 Return line
3 Vacuometer connection
4 Manometer connection
5 Pressure adjuster
21 GB
Fig. 22
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