Hydraulic Systems; Priming The Pump - Riello 40 Series Installation, Use And Maintenance Instructions

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.
WARNING
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).
A filter must be installed on the suction fuel line.
D5219
H = Difference of level.
L = Max. length of the
suction line.
I.D.= Internal diameter of the
oil pipes.
D5220
2903360
H
meters
0.5
1
1.5
2

PRIMING THE PUMP

Loosen the plug of the vacuum gauge (9, fig. 1) and
wait until the fuel flows out.
L meters
H
I. D. I.D.
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
I. D. I.D.
8 mm 10 mm
10 20
20 40
40 80
60 100
The pump vacuum should not exceed 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 suc-
tion 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 priming.
Should lock-out occur prior to the arrival
of the fuel, await at least 20 seconds
before repeating the operation.
A
D5199