7
Oil burner
Installation and operating instructions
37
Daikin/ROTEX A2 F
Oil condensing boiler A2 F
008.1546499_02 – 04/2018 – EN
Device type
Fan speed
Fan pressure
Oil pressure
Recircula-
tion gap
Air nozzle/
oil nozzle
dis-
tance
(7)
P1
P2
P3
P1
P2
P3
P1
P2
P3
%
rpm
%
rpm
%
rpm
mbar
mbar
mbar
mbar
mbar
mbar
mm
mm
A2 F 18H
38
3238
62
5282
90
7753
13.0
21.1
31.0
5
11
28
1
2
A2 F 24H
38
3238
62
5282
90
7753
13.0
21.1
31.0
5
11
28
2
2
A2 F 32H
38
3238
62
5282
90
7753
13.0
21.1
31.0
5
11
27
2
2
Tab. 7-3
Setpoint values of the A2 F - Part 2
Pre-ventilation
time
Pre-ignition
time
Safety time
Flame stabilisa-
tion time
Post-ventilation
time
Maximum
speed
Pre-ventilation
speed
Post-ventilation
speed
t
prp
t
pri
T
S
t
fs
t
pop
n
max
n
prp
n
pop
5 s
10 s
10 s
30 s
120 s
8520 rpm
75 %
75 %
Tab. 7-4
Factory parameters
7.3.2
Establishing access to the burner
1
Remove the boiler cladding (see
Chap. 4.10
).
7.3.3
Checking and setting the burner
The oil burner is factory-set to a certain power range in which it can
modulate.
Oil nozzles
Use Danfoss oil nozzles type 80° H to maintain minimum emission
values.
7.3.4
Check the vacuum at the oil pump
Fig. 7-4
Oil pump
Item
Designation
1
Vacuum meter connection
2
Type plate
3
Solenoid valve
4
Pump cover
5
Manometer connection
6
Connection for suction line
7
Connection for return flow line
8
Oil pump filter
Tab. 7-5
Legend for
Fig. 7-4
Checking the oil pressure
The oil pressure on the pump can be varied within the range of 5 -
28 bar. Increasing the oil pressure leads to higher boiler output,
while reducing the oil pressure leads to lower boiler output.
The oil pressure is monitored by the oil pump control unit. For this
purpose, fixed values (that cannot be changed) are stored in the
control unit.
Required tools: Allen key SW 4 mm; pressure gauge 1/8", 0 -
≤ 28 bar.
1
To check the oil pressure, connect the manometer to the mano-
meter connection (
Fig. 7-4
, item 5) of the oil pump.
Check vacuum
For long and fault-free operation, the oil supply system must be ad-
justed so that the vacuum does not exceed 0.2 bar.
Required tools: Vacuum gauge R 1/8 "; Allen key SW 4 mm.
WARNING
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.
▪ Reduce the vacuum, check the oil supply if necessary.
1
Connect vacuum meter to the V connection (
Fig. 7-4
, Pos. 1)
and measure vacuum with active burner.
7.3.5
Adjusting the flue gas quality
INFORMATION
The A2 F is generally designed to be operated independ-
ently of the ambient air and is equipped with a concentric
flue gas / supply air connection DN 80/125. If its operation
is ambient air-dependent and it is only connected to a
single wall flue gas pipe, the settings can differ from the
values given in Tab. 22.
The combustion air volume is set on the RoCon BF controller. The
CO
2
content in the flue gas must be regulated by adjusting the air
volume to 13.0 - 13.5 % or the O
2
content to 2.6 - 3.3 %.
Tool required: Flue gas analysis device to determine the CO
2
/O
2
content in the flue gas.
(7)
Dimension Y, see
Fig. 7-7
