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HYDRAULIC SYSTEMS
WARNING : Before starting the burner make sure that the return pipe-line is not clogged: any ob-
struction would cause the pump seals to break.
Important : The pump is supplied for use with a two pipe system.
For use on a one pipe system, it is necessary to remove
the by-pass screw (A), (see figure).
D5374
H = Difference of level.
L = Max. length of the suc-
tion line.
I.D.= Internal diameter of the
oil pipes.
D5376
A metal bowl filter with replaceable micronic filter must be fitted in the oil supply pipe.
2095
H
meters
0,5
1
1,5
2
L meters
H
ø
ø
i
meters
8 mm
10 mm
0
35
100
0.5
30
100
1
25
100
1.5
20
90
2
15
70
3
8
30
3.5
6
20
4
GB
L meters
ø
ø
i
i
8 mm
10 mm
10
20
20
40
40
80
60
100
The pump vacuum should not exceed
i
a maximum of 0.4 bar (30 cm Hg).
Beyond this limit gas is released from
the oil.
Oil lines must be completely airtight.
The return line should terminate in
the oil tank at the same level as the
suction line; in this case a non-return
valve is not required.
When the return line arrives over the
fuel level, a non-return valve must be
used.
This solution however is less safe than
previous one, due to the possibility of
leakage of the valve.
PRIMING THE PUMP:
Start the burner and wait for the prim-
ing. Should lock-out occur prior to the
arrival of the fuel, await at least 20 sec-
onds before repeating the operation.
A
D5199
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