Additional information
Wiring diagram
Legend
A’
Start of oil pre−heat time
A’
Start−up
B
Timing of flame
being established
C
Operating position
D
Controlled switch−off
fA
Burner plug on the
control unit
F
1.1
Fuse in the control unit
F
6
High limit safety cut−out
F
7
Thermostat
S
1
Mains electrical switch
S
2
Test button
K
1
Burner relay
1
qW
Plug−in terminals on the
oil burner control unit
Colour coding conforming to
DIN/IEC
757
BK
black
BN
brown
BU
blue
1)
Connection of assembly modules and
accessories via system plug−in
connector
fA
(e.g. KNL, extension lead,
etc.)
2)
Connection of external safety
equipment via system plug−in
connector
aBÖ
3)
Connection of external control
off−switch via system plug−in
connector
aBÖ
4)
Connection for external burner ON
Please note:
This wiring diagram only applies in
conjunction with Viessmann
products.
5692452 GB
25/26
Control unit
components
Oil burner control unit
On−site
supply
Ext. fault
lamp
Op. lamp
plug−in panel
Oil pre−heater
Solenoid valve for
ext. connection via
separate adaptor
Burner
motor
Flame
monitor
Ignition
transformer
Operating lamp
or hours run counter
ext. (control unit)
Solenoid valve
on the oil pump
Function sequence on start−up
Flame monitor
Solenoid valve
transformer
Ignition
Burner motor
Oil pre−heater
Control program LOA X4 . . . .
Control program LMO 14 .113
t0
Oil pre−heat time 2)
up to 2min
t1
Pre−flush time
approx.
13s
t2
Safety time
max.
10s
t3
Pre−ignition time
approx.
13s
t3n Post−ignition time
approx.
15s
if the flame is established
t0
Oil pre−heat time 2)
up to 2min
t1
Pre−flush time
approx.
16s
t2
Safety time
max.
10s
t3
Pre−ignition time
approx.
15s
t3n Post−ignition time
approx.
3s
if the flame is established
2) Depending on the temperature of the
fuel oil supplied
15 to 40 kW
