3209
3
HYDRAULIC SYSTEMS
WARNING
The pump is supplied for use with
a one pipe system. For use on a two pipe system, it
is ne cessary to screw the
by-pass screw (A)
sup -
plied as burner’s accessory. (See figure).
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 suction line
; in this case a non-return valve is not required.
Should however the ret urn line arrives over t he f uel level, t he non-
return valve is indispensable.
This solution however is less safe than previous one, due to the possi-
bility of leakage of the valve.
WARNING:
◆
Check periodically the flexible pipes conditions. Using kerosene, they have t o be replaced at
least
every 2 years.
◆
A metal bowl filter with replaceable micronic filter must be fitted in the oil supply pipe.
PRIMING 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.
Warning:
before starting the burner make sure that the return pipe-line is not clogged: any obstruc-
tion would cause the pump seals to break.
H
meters
L meters
I. D.
8 mm
I.D.
10 mm
0.5
1
1.5
2
10
20
40
60
20
40
80
100
PRIMING PUMP
Loosen the plu g of the vacuum
gauge (8, fig. 1) and wait until the
fuel flows out.
A
H
meters
L meters
I. D.
8 mm
I.D.
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
m
ax
. 4
m
H
H
max.
4
m
min.
0
.1
m
D5299
D5300
D5199
H
=
Difference of level.
L
= Max.
length of t he suc-
tion line.
I.D.
=
Internal diameter of t he
oil pipes.
