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.
Gas pressure swi ch
Mo or
Air pressure swi ch
Transformer
Gas valve
High flame ON/OFF
Flame de ec ion
Lock ou
lamp
CALCU LATI O N O F W O RKI N G O U TPU T O F TH E BU RN ER
To c al c ul at e t he bur ner ' s wor ki ng out put , i n kW , pr oc eed as f ol l ows :
- 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:
1 - PUMP
2 - SAFETY OIL VALVE
3 - OIL VALVE
4 - RETURN OIL VALVE
5 - NOZZLE
6 - GAS PRESSURE SWITCH
7 - SAFETY GAS VALVE
8 - GAS VALVE
AD J U STM EN T O F G AS M I N I M U M PRESSU RE SW I TCH
Unscrew off and remove cover M. - Set regulator N to a value equal to 60% of gas
nominal feed pressure (i.e. for nat. gas nom. pressure = 20 mbar, set regulator to a value
of 12 mbar; for L.P.G. nom. pressure of G30/G31- 30/37 mbar, set regulator to a value
of 18 mbar).Screw up cover M
AD J U STM EN T O F TH E AI R PRESSU RE SW I TCH
Unscrew screws A and B and remove cover C.- Set the pressure switch to the minimum
by turning regulator D to position 1.
- Start the burner and keep in low flame running, while checking that combustion is
correct. Through a small cardboard, progressively obstruct the air intake until to obtain
a CO2 increase of 0,5÷0,8% or else, if a pressure gauge is available, connected to pres-
sure port E, until reaching a pressure drop of 1mbar (10 mm of W.G.). - Slowly increa-
se the adjustment value of the air pressure switch until to have the burner lockout.
Remove the obstruction from the air intake, screw on the cover C and start the burner
by pressing the control box rearm button.
N ot e: The pr es s ur e m eas ur ed at pr es s ur e por t E m us t be wi t hi n t he l i m i t s of t he pr es -
s ur e s wi t c h wor ki ng r ange. I f not , l oos e t he l oc ki ng nut of s c r ew F and gr adual l y t ur n
t he s am e: c l oc kwi s e t o r educ e t he pr es s ur e; c ount er c l oc kwi s e t o i nc r eas e. At t he end t i ght en t he l oc ki ng nut .
CO N TRO L BO XES LAN D I S & STAEFA LG B22
2
3
1
5
6
G AS CI RCU I T
420010239601 M ul t i c al or 45 ÷ 140 PR/ PR
4
Description
1
pressure swi ch con rol ime-ou
2
ime-ou for air pressure confirma ion
3
prewashing ime
4
safe y ime
5
preigni ion ime
6
ime-ou
o enable fuel 2nd valve
e x f = kW
s
VGS
6
7
VgS
1
2
Suction
A
Return
R
VgR
4
13
9"
3"
30"
3"
3"
8"
e =
Litres of gas
s =
Time in seconds
G20 = 34,02
G25 = 29,25
f
G30 = 116
G31 = 88
VG
8
Vg
3
5
N
M
I
L
D
C
A
G
B
F
EN
H
E