– English –
Mounting and commissioning
FloCo-Top-2
29
6
Mounting and commissioning
FloCo-Top-2 is installed upstream of the burner. The fitting may be
installed above or below the tank level.
6.1
Determining the cross section of the suction line
When dual-pipe systems are converted to single-pipe operation, the
flow rate of the oil in the suction line is reduced.
In order to avoid air cushions in higher pipe sections and pipes
with gradients (shutdowns due to error conditions), check and
size the cross section of the suction line according to DIN 4755-
2 (flow rate 0.2 - 0.5 m/s).
a
Nozzle consumption burner Brenner
[l/h]
b
Inside diameter (nominal diameter) of
the suction line [mm]
c
Flow rate of the fuel oil [m/s]
d
< Ø 4 not advisable
e
Recommended range as per DIN 4755-
2
Fig. 28: Nomograph
Example:
Volume = 20 l/h, flow rate = Ø ~ 0.23 m/s. A pipe with a pipe diame-
ter of 8 x 1 mm (nominal diameter 6) is required.
6.2
Determination of suction line length
For the determination of the maximum possible suction line length,
the table assumes that the maximum suction vacuum is not sup-
posed to exceed -0.4 bar (cavitation limit). An additional pressure
loss of 50 mbar is considered for the resulting filter pollution.
The maximum density of fuel of EL of 860 kg/m³ and a kinematic vis-
cosity of 6 mm²/s as per DIN 51603 is used for the pressure loss due
to the friction in the pipe.
