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HYDRAULIC SYSTEMS
WARNING : Before starting the burner make sure that the return pipe-line is not clogged: any
obstruction 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 (2), (see Fig. 7).
D5374
H = Difference of level.
L = Max. length of the
suction 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.
2094
L meters
H
ø
i
meters
8 mm
10 mm
0
35
0.5
30
1
25
1.5
20
2
15
3
8
3.5
6
The suction plug 1)(Fig. 7) is made of plastic. Once removed, it
must not be used again.
In single-pipe installations, the plug in the return line 2) must be
WARNING
totally in steel.
L meters
H
ø
i
meters
8 mm
10 mm
0,5
10
1
20
1,5
40
2
60
The pump vacuum should not exceed a
maximum of 0.4 bar (30 cm Hg).
Beyond this limit gas is released from the
ø
i
oil.
Oil lines must be completely airtight.
100
The return line should terminate in the
100
oil tank at the same level as the suc-
100
tion line; in this case a non-return valve
90
70
is not required.
30
When the return line arrives over the fuel
20
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 priming.
Should lock-out occur prior to the arrival
of the fuel, await at least 20 seconds
before repeating the operation.
4
GB
Fig. 7
ø
i
20
1
40
80
100
2
D9623
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