Figure 5: Version 2: Simulation of a line rupture through pressure measurement on the
anti-siphon device
For this functional check it is necessary to comply
with the following steps:
Connect the pressure gauge.
1. Successfully complete leak testing with test
vacuum -300mbar.
2. In the event of the subsequent assembly of a
test connection in the oil line, the actual
hydrostatic pressure of the fuel oil column also
has to be calculated po,g at the height of ∆X+
instead of the height ∆X.
3. Refer to the table for the hydrostatic pressure
of fuel oil column p
4. Calculate the minimum permitted closing
pressure of the safety equipment against
siphoning p
= (p
o,
Comment 1:
The closing pressure of the diaphragm-controlled anti-siphon device must always be above the
value of the hydrostatic pressure of fuel oil column p
allowance selected for this purpose totals 5mbar acc. EN 12514.
26 / 60
.
o,g
+ 5) • (-1) [mbar].]
o,g
The function check is also possible
without removing the distiller hose line
by measuring the vacuum directly
after the diaphragm-controlled anti-
siphon device. Either you directly use
the factory-set test connection
you equip the suction line with a test
connection
.
A pressure gauge, e.g. a manometer
which is subject to test equipment
monitoring, is to be used for the
pressure measurement.
Hydrostatic pressure of the fuel oil
column depending on the height
Height ∆X
(∆X+)
in [mm]
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
2.75
3.00
3.25
3.50
3.75
4.00
and is set in the factory. The safety
o,g
or
p
in [mbar]
o,g
fuel oil EL
42
63
84
10
12
14
16
19
21
232
253
274
295
317
337
Artikel-Nr. 15 513 50 c