1
3
EN
420010331102
M ulticalor 45 ÷ 140 AB/AB
CONTROL BOXES LANDIS & STAEFA LGB21/LGB22
The Landis control box starts the fan and begins the pre-purging of the combustion chamber. The air pressure switch
controls the correct operation. At the end of the pre-purging phase, the ignition transformer cuts-in followed by the
opening of the gas valves. In case of missed ignition or accidental shutdown, the ionisation probe cuts-in and set the
burner in lockout mode within the safety time.
Description
1¡ STADIO GAS
VgS
Vg2
Vg1
VG2
VG1
VGS
1
2
3
4
5
6
10
9
8
7
2
°
STADIO GAS
VgS
Vg2
Vg1
VG2
VG1
VGS
1
2
3
4
5
6
10
9
8
7
GAS CIRCUIT
SUCTION
RETURN
SUCTION
RETURN
1 -
PUMP
2 -
SAFETY OIL VALVE
3 -
LOW FLAME OIL VALVE
4 -
HIGH FLAME OIL VALVE
5 -
LOW FLAME NOZZLE
6 -
HIGH FLAME NOZZLE
7 -
GAS PRESSURE SWITCH
8 -
SAFETY GAS VALVE
9 -
LOW FLAME GAS VALVE
10 -
HIGH FLAME GAS VALVE
To calculate the burner’s working output, in kW, proceed as follows:
- Check at the meter the quantity of supplied litres and the duration,
in seconds, of the reading, then calculate the burner’s output through
the following formula:
CALCULATION OF WORKING OUTPUT OF THE BURNER
e x f = kW
s
e
=
Litres of gas
s
=
Time in seconds
G20 = 34,02
G25 = 29,25
G30 = 116
G31 = 88
f