7
x
Oil burner
FA ROTEX A1 BOe - 02/2014
37
7.6 Automatic firing connections
The function mode of the automatic firing is described in
section 7.1.
n.a.
Not assigned
Tab. 7-2 Assignment and colours of the connection cable on the
automatic firing CM165-R1
7.7 Ignition transformer with flame monitor
The ignition transformer with flame detection is a high-frequency
ignition device with a vibration frequency of approx. 15 - 20 kHz.
The flame of fuel-air mixture is detected by the ignition electrode
via a special switching.
With a flame present, a stream of ions is set up between the ig-
nition electrode and earth. The signal is evaluated in the ignition
device. This signals the automatic firing whether there is a flame
or not.
The ignition can be operated in parallel with the flame monitor,
without influencing it.
A LED indicates the operating status:
Ɣ
5 seconds after burner request a flashing LED (flashing
frequency 1 - 2 Hz) signals readiness (power supply present,
but no flame).
Ɣ
If a flame is detected, the LED switches from flashing to
continuous within one second.
Ɣ
If the flame goes out the LED is switched off for approx. 5
secs. After the 5 seconds the LED starts to flash again and
thus indicates the readiness for flame monitoring.
7.8 Oil burner pump and oil filter
The oil burner pump is a self-suctioning gear pump which is con-
nected as a two-strand pump through a venting oil filter. Suction
filters and oil pressure controllers are integrated in the pump.
Fig. 7-14 Automatic firing CM165-R1
Connect
or
Pin
Cable colour
Function
X1
L1
brown
Mains connection,
switched by boiler control-
ler (connection J10)
PE
green/yellow
N
blue
X2
DI
brown
Oil preheater
L1
black
PE
green/yellow
N
blue
X13
L1
brown
Oil valve
VV
n.a.
V1
blue
PE
green/yellow
X4
1
brown
return flow temperature
sensor
3
blue
2
brown
Flow temperature sensor
4
blue
X5
BUS -
brown
Communication with
boiler controller
BUS +
blue
X6
N
blue
ignition
PE
n.a.
L
brown
X7
N
blue
Flame monitor
(N + FL: Switching output)
(L1: continuous power
supply)
FL
black
L1
brown
X8
N
blue
Oil pump + blower
PE
green/yellow
L1
brown
X9
HALL
n.a.
none
PWM
n.a.
GND
n.a.
1
Ignition cable connections
(2x 7.5 kV)
2
Status display (LED)
3
Connection flame monitor
4
Earth connection
5
Ignition connection (input)
Fig. 7-15 Ignition transformer with integrated flame monitor
If the LED flickers during burner operation inadequate
earthing of the burner is probable.
Ɣ
Check protection earthing.
To protect the oil pump, either insert the enclosed
micro-replacement filter insert
MC-7
, (
15 60 13
) for
short filter cups or the
MC-18
, (
15 60 14
) for long
filter cups in the ventilation oil filter. Only use paper fil-
ters of maximum 25
μ
m.
