CALCULATING THE BURNER CAPACITY
To calculate the burner's capacity in kW, proceed as follows: Check the gas flow rate (in liters)
on the counter and the time of the reading in seconds.
Proceed with the calculation using the following formula: x f = kW
e
sec
e
= Litres gas
sec = Time in second
G20 = 34,02
G30 = 116
G31 = 88
f
pag.4
techniques for energy saving
LB1374
MULTIFLAM 700.1÷1200.1 PR
LANDIS & STAEFA SQM 50.481A2 AIR DAMPER MOTOR
Remove cover to gain access to the adjusting cams.The cams are to be adjusted through the suitable key provided
for. Description:
I
- High flame operating opening position adjusting cam (Light-Oil /Gas)
II
- Limit switch for the air damper position at burner’s shut down
III
- Ignition flame opening position adjusting cam (Gas).
IV
- Ignition flame opening position adjusting cam(Light-Oil)
V
- Low flame operating opening position adjusting cam (Gas)
VI
- Low flame operating opening position adjusting cam (Light-Oil)
VII
- Not used cam
VIII
- Not used cam
Manual change
The control box starts the burner
fan, to carry out the prepurging of
the combustion chamber, and
cheks the vent air pressure throu-
gh the air pressure switch. At the
end of prepurging, the ignition
transformer cuts-in and generates
a spark between the electrodes. At
the same time the two gas valves
open (Vs safety valve and Vl working valve). The total safety, in case of missed ignition or casual burner's flame-out,
is granted by a ionisation probe which cuts-in and sets the burner shutdown within the safety time. In case of gas
lack or a major pressure drop, the minimum air pressure switch shuts down the burner.
LANDIS & STAEFA, Model LFL1.622-LFL1.333 OPERATING CYCLE
Ref. Description
t1
Duration Waiting time for confirmation
t2
of air pressure
t3
Preventilation time
t4
Safety time
t5
Pressurizing time
Time for enabling operation of the
main gas valve on minimum capacity
t6
Time for enabling operation of the
main gas valve on maximum capacity
Duration
8”
66”
2”
4”
10”
10”
Rivelazione
di fiamma
Spia di blocco
Valvola gas
Serranda aria
Serranda gas
Trasformatore
di accensione
Pressostato aria
Motore ventilatore
Pressostato gas
0
min
100%
t1
t2
t4
t3
t6
t5
Ciclo di funzionamento normale
Ciclo di funzionamento
in mancanza di fiamma all'accensione
t1
t2
t4
t3
Consenso
min./max. potenza
Gas manostat
Fan motor
Air Switch
Ignition transformer
Gas valve
Min/max capacity
enabling device
Air damper
Gas damper
Flame detector
Cut-out pilot lamp
Normal operating cycle
Operating cycle in the event of
ignition failureNormal operating cycle
