Once having installed the burner, check the following items:
- The burner power feeding and the main line protection fuses
- The correct length of pipes and that the same are sealed.
- The type of fuel, which must be suitable for burner.
- The connection of boiler's thermostats and all the safeties.
When all the above mentioned conditions are checked and accomplished, it is possible to go on with burner's
tests. Power the burner. The control box feeds the ignition transformer and the burner's motor at the same
time, which will run a prepurging of the combustion chamber for about 20 sec.
At the end of prepurging, the control box opens the fuel pump and the 1st stage (Low flame) solenoid valves,
the ignition transformer produces a spark and the burner ignites. After a safety interval of 5÷10 seconds and a
correct ignition, the control box turns off the ignition transformer and, 10 seconds later, sets the air damper
to its maximum opening and opens the 2nd stage solenoid valve (High flame). In case of faulty ignition, the
control box switches the burner into safety condition. In order to obtain an optimal combustion, it is neces-
sary adjust the LOW - HIGH flame air flow, according to the instruction given further on. The fuel pump
feeding pressure, must remain around 12 bar.
LANDIS LMO 44 CONTROL INFORMATION SYSTEM
In case of burner lockout, it is possible to read which cause originated it. Proceed as follows: with the burner in lockout
mode (red LED switched on) keep pressed the lockout button for more than 3 sec. then release it. The red LED will
blink according to the following error code list:
Connection diagram and internal diagram LMO44...
µC-Steuerung
µC1
EK1
LED
K2
K1
K4
8
3
1
2
10
kbr
SB
8
3
R
OW
W
OH
AL
N
Si
L
N
7130a04/1105
AL
Alarm device
BV... Fuel valve
EK1
Lockout reset button
EK2
Remote lockout reset button
FS
Flame signal
FSV
Flame signal amplifier
K...
Contacts of control relay
kbr Cable link (required only
when no oil preheater is used)
LED
3-color signal lamp
M
Burner motor
OW
Release contact of oil preheater
OH
Oil preheater
BURNER START-UP AND ADJUSMENT
µC2
FSV
K3
4
6
7
5
9
11
12
QRB
EK2
BV2
QRC
1
bl
sw
M
Z
BV1
br
QRB... Photoresistive flame detector
QRC... Blue-flame detector
bl = blue, br = brown, sw = black
R
Control thermostat or
pressurestat
SB
Safety limit thermostat
Si
External primary fuse
W
Limit thermostat or pressure
switch
Z
Ignition transformer
TSA
Ignition safety time
tw
Waiting time
Control sequence LMO44...
A´
A
B
R
W
SB
tw
OH
OW
t1´
M
t1
BV1
BV2
t3
Z
FS
t1
t1´
t3
t3n
t4
A´
A
B
C
D
15
420010334402 Max P 35 / 45 AB
C
D
1
8
3
3
4
t4
5
t3n
6
TSA
11
7130d05/1105
12
Prepurge time
Purge time
Preignition time
Postignition time
Interval from flame signal to
release of «BV2»
Start of startup sequence with
burners using an «OH»
Start of startup sequence with
burners using no «OH»
Time of flame establishment
Operating position
Controlled shutdown by «R»
EN