5906
4
SUPPLY LINE
NOTICE
Before placing the burner in operation, ensure that the return line is open.
Any obstruction may damage the pump seal.
Pump priming: Fill the pump with the light oil from the vacuometer plug (5) (fig. 1), put the burner in operation, purge
the air from the manometer plug (4) (fig. 1) and wait for the pump priming. If lock-out occurs repeat the procedure.
H
= Difference in the pipes height
L
= Total length of the suction tube
øi
= Internal diameter of the tube. Copper tubes ø 14 and 16 mm could be replaced by steel tubes G 1/2” and G 3/4”.
Pump priming: Loose the tap from the vacuometer
plug 5 (fig. 1) and wait for the flow of the fuel.
Pay attention to do not overcome the max. depression of 0.45 bar (35 cm Hg), over this
value the fuel may turn into gas.
Check the pipes are perfectly sealed.
When the fuel tank is under the burner level we suggest to let the return line arrive where
the suction line starts.
In this case the foot valve is not necessary.
Should the return line arrive over the fuel level, the foot valve is indispensable. Notice that
this solution is less safe than the previous one, because it is possible the valve has not a
good sealing.
H
meters
L meters
I.D. 14 mm
I.D. 16 mm
0
0
5
0,5
5
10
1
10
20
1,5
20
40
2
30
50
H
meters
L meters
I.D. 14 mm
I.D. 16 mm
0
50
100
0.5
40
80
1
30
60
1.5
20
40
2
10
20
3
5
10
