Ionization Current - Ecoflam Multicalor 500.1 PR/PR Manual Del Usuario

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 mini-
mum 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 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 bur-
ner 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
pressure 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.
fondo scala 1000 µA
Fotocellula UV CELL
the earthing of the burner. The ionization current is normally > 20 µA.
Once having installed the burner, check the following items:
- The burner power feeding and the main line protection fuses
- The correct length of pipes and that the same are sealed.
- The type of fuel, which must be suitable for burner.
- The connection of boiler's thermostats and all the safeties.
- The motor rotation direction.
- The correct calibration of the motor's thermal protection.
When all the above mentioned conditions are checked and accomplished, it is possible to go on with burner's tests.
Power the burner. The control box feeds the ignition transformer and the burner's motor at the same time, which will
run a prepurging of the combustion chamber for about 20 sec.

IONIZATION CURRENT

Microamperometer
Microamperometro
full scale 1000 µA
min 70
µA
REMOVING THE FIRING HEAD
OPERATION OF BURNER WITH LIGHT-OIL FUEL
LB1661 MULTICALOR 500.1-600.1 PR/PR
The ionization current is checked by inserting a microam-
LANDIS
meter with an end of scale of 50 µA (d.c.) in series with
LFL 1.622
the ionization probe.
22 23
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 failure. In this case, check
the position of the electrode, its electric connection and
pag.15
Gas pressure
switch
N
M
I
L
Air pressure
switch
D
C
A
G
B
1
0 - STOP
Light oil
1 - GASOLIO
0
2 - GAS
B
H
E
F
2