pag.6
techniques for energy saving
LB1360
MULTICALOR 700.1÷1200.1 MD
The ionization current is checked by inserting a microam-
meter with an end of scale of 50 µA (d.c.) in series with
the ionization probe. A faulty position of the electrode
can lead to a reduction in the ionization current and cause
a safety cut-out of the burner due to a flame detection fai-
lure. In this case, check the position of the electrode, its
electric connection and the earthing of the burner. The
ionization current is normally > 20 µA.
REMOVING THE FIRING HEAD
IONIZATION CURRENT
ADJUSTMENT OF GAS MINIMUM PRESSURE SWITCH
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
ADJUSTMENT OF THE AIR PRESSURE SWITCH
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 cor-
rect. 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 pressure
port E, until reaching a pressure drop of 1 mbar (10 mm of W.G.). - Slowly increase 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.
Note: The pressure measured at pressure port E must be within the limits of the pressu-
re switch working range. If not, loose the locking nut of screw F and gradually turn the
same: clockwise to reduce the pressure; counterclockwise to increase. At the end tighten the
locking nut.
2,5
5
10
15
50
2
5
35
30
40
45
20
0,4
0,6
0,9
3,0
1
,5
2,1
1,8
2,4
2,7
1,2
I
L
M
N
A
B
C
D
E
F
G
H
gas pressure
switch
air pressure switch
22 23
LANDIS
LFL 1.622
Fotocellula
min 70
µ
A
Microamperometro
fondo scala 1000
µ
A
PHOTORESISTOR
Microamperometer
full scale 1000 µA
