7
Oil burner
Installation and operating instructions
35
Daikin/ROTEX A2 F
Oil condensing boiler A2 F
008.1546499_01 – 03/2018 – EN
7
Oil burner
7.1
Design and brief description
Image 7-1 A2 F Oil burner – View from top
Image 7-2 A2 F Oil burner - Side view from left
Image 7-3 A2 F Oil burner - Side view from right
Item
Designation
Item
Designation
1
Oil combustion control-
ler
10
Burner flange with
gasket
2
Oil pump
11
Service screw
3
Heating oil suction line 12
Service Allen key
4
Heating oil return line
13
Holder for service pos-
ition
5
Burner blower
14
Setting gauge
6
Supply air connection
15
Oil pump control unit
7
Blower pressure
measurement spigot
16
Recirculation tube
8
Solenoid valve
17
Burner pipe
9
Ignition transformer
with flame monitoring
18
Nozzle fitting cover
Tab. 7-1
Legend for
The blue burner installed as standard is similar in design and func-
tion to EN 267. The burner is engaged on the burner flange with a
bayonet lock and secured with a service screw. The construction of
the burner head with internal flue gas recirculation makes high effi-
ciency, low nitrogen oxide combustion possible. The burner tube is
firmly mounted in the burner flange.
Oil preheating
The heating oil is preheated during the start phase. To do this, the
boiler controller first switches the nozzle rod heating on. As soon as
the oil preheating temperature is reached, the thermostat of the
nozzle bar heating triggers the programme sequence. The heating
time with a cold start is 2 – 3 minutes.
Sequence of firing programme
The firing program is monitored by the firing unit. It proceeds with the
following steps:
1
Oil preheating.
2
Electric motor starts up, preliminary ventilation.
3
Ignition switches on.
4
Solenoid valve opens.
5
Flame formation.
6
Ignition switches off.
7
Burner runs in start load (approx. 57 %).
8
Stabilisation time runs, then modulation to setpoints.
