pag.10
B
LB1215
BLU 7000.1 - 12000.1 PR / MD
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 opening position adjusting cam (Air)
II
- Limit switch for the air damper position at burner’s shut down
III
- Min. flame opening position adjusting cam (Air).
IV
- Low flame opening position adjusting cam (Air)
V
- Not used cam
VI
- Not used cam
VII
- Not used cam
VIII
- Not used cam
Cam VIII
is never used
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 Low flame 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 LFL1.622-1.333 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
Farfalla 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
Содержание BLU 10000.1 PR
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