7
x
Oil burner
FA ROTEX A1 BOe - 02/2014
33
7.3.3 Check vacuum in the oil pump and set the oil
pump pressure
Setting oil pressure
The oil pressure on the pump can be varied within the range of
10 - 18 bar. Increasing the oil pressure leads to higher boiler
output, while reducing the oil pressure leads to lower boiler
output.
Tools required
: Allen key SW 4 mm; Pressure gauge 1/8",
0 - 20 bar.
Ɣ
To increase pressure: Adjusting screw (fig. 7-4, pos. 2) for oil
pressure to be turned to the
right
.
Ɣ
To reduce the pressure: Adjusting screw (fig. 7-4, pos. 2) for
oil pressure to be turned to the
left
.
Ɣ
To check the oil pressure, connect the pressure gauge to the
pressure gauge connection (fig. 7-4, pos. 5) of the oil pump.
Check vacuum
For a long and fault-free operation, the oil supply system must be
adjusted such that the vacuum does not exceed 0.2 bar.
Tools required: Vacuum meter R 1/8"; Allen key SW 4 mm;
Ɣ
Connect vacuum meter to the V connection (fig. 7-4, pos. 1)
and measure vacuum with active burner.
7.3.4 Set air quantity
The combustion air quantity is set using the adjusting screw for
the air throttle (fig. 7-5, pos. 1). The
CO
2
content in the flue gas
must be regulated to
12.5 - 13.0 %
or the
O
2
content to
3.3 -
4.0 %
.
Tools required
: Flue gas analysis device to determine the
CO
2
/O
2
content of the flue gas.
Ɣ
Connect up the flue gas analysis unit.
Ɣ
To reduce air quantity: Turn air throttle adjusting screw to the
left (lower scale value)
Î
O
2
È
, CO
2
Ç
Ɣ
To increase air quantity: Turn air throttle adjusting screw to
the right (higher scale value)
Î
O
2
Ç
, CO
2
È
1
Vacuum meter connection
2
Adjusting screw for oil pres-
sure
3
Solenoid valves
4
Pump cover
5
Manometer connection
6
Flow connection
7
Return connection
8
Oil pump filter
Fig. 7-4
Oil pump
CAUTION!
If the vacuum at the oil pump is too high, it causes
greater wear to the pump and can destroy it.
If the vacuum is greater than 0.4 bar, the heating oil
can degasify. There will be whistling noises in the
pump, the pump can be destroyed. Vacuum greater
than 0.2 bar causes greater pump wear.
Ɣ
Reduce the vacuum, check oil supply if necessary.
The ROTEX A1 BO is generally designed to be op-
erated independently of the ambient air and is equipped
with a concentric flue gas / supply air connection
DN 80/125. If it is operated depending on the ambient
air and it is only connected to a single wall flue gas pipe,
the settings can differ considerably from the values
given in tab. 7-1.
1
Adjusting screw for air
throttle
2
Scale air throttle
Fig. 7-5
Setting the air throttle
You can make a rough pilot adjustment to the air quan-
tity by using the values from tab. 7-1. But the rough
adjustment cannot replace the fine adjustment with
CO
2
/O
2
measurement in any case.