2701
6
GB
PRIMING PUMP
On the system in fig. 8
it is sufficient to loosen the suction gauge connection (6, fig. 7 pag. 4) and wait un-
til oil flows out.
On the systems in fig. 9 and 10
start the burner and wait for the priming. Should lock-out occur prior to
the arrival of the fuel, await at least 20 seconds before repeating the operation.
The pump suction should not exceed a maximum of 0.4 bar (30 cm Hg).
Beyond this limit gas is released from the oil. Oil pipes must be completely tight.
In the vacuum systems (fig. 10) the return line should terminate within the oil tank at the same level 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.
D5395
H
Fig. 8
m
ax 4
m
H
meters
L meters
ø
i
8 mm
ø
i
10 mm
0.5
1
1.5
2
10
20
40
60
20
40
80
100
H
meters
L meters
ø
i
8 mm
ø
i
10 mm
0
0.5
1
1.5
2
3
3.5
35
30
25
20
15
8
6
100
100
100
90
70
30
20
H
H
H
max 4
m
ma
x 4
m
H
Fig. 9
Fig. 10
D6148
D6147
H
= Difference of level
L
= Max. length of the suction line
øi
= Internal diameter of the oil pipes
