pag.4
tecniche per il risparmio energetico
LB1292
MULTIFLAM 500.1 PR - 600.1 PR
techniques for energy saving
The control box starts the burner
fan, to carry out the prepurging of
the combustion chamber, and
cheks the vent air pressure through
the air pressure switch. At the end
of prepurging, the ignition tran-
sformer 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 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
ADJUSTING THE PRESSURE REGULATOR
The pressure regulator, complete with its incorporated filter, must be installed to avoid conta-
minants reaching the gas valve. It is important to ensure certain conditions: The pressure of the
gas must not exceed the established maximum pressure. To increase the pressure of the gas sup-
ply, tighten screw C; to reduce the pressure, loosen screw C. After making any adjustments, put
the cap back in place.
+
–
C
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
ADJUSTMENT OF GAS SOLENOID VALVES
The ignition flow rate is carefully adjusted. during test phase to 1/3 of the maximum flow rate (according to specifications).
Operations for eventual further adjustment must be carried out by skilled personnel authorized by ECOFLAM.
DUNGS DMV-DLE
To adjustment gas output, loosen the screw R and turn the knob P as required. To
reduce output, turn knob clockwise, to
increase it turn knob counterclockwise.
Tighten the screw R. For fast opening
adjustment, remove the cap T and
insert it in the pin Q with its groove
up. To reduce firing output screw it up,
to increase, unscrew it.
Q
R
+
–
P
R
Q
T
