M039150CF
36
OPERATION
z
Choose the typer of fuel by turning the
A
switch, on the burner control panel.
CAUTION:
if the fuel chosen is light oil, be sure the cutoff valves on the feed and return pipes are open.
z
Check the control box is not locked (signalling light
O
, on); if so, reset it by means of the pushbutton
C
.
z
Check the series of thermostats and pressure switches turn the burner to on.
1
Select the fuel by means of the
A
switch on the burner’s control panel.
NOTE: if the fuel chosen is light oil, be sure the cutoff valves on the feed and return pipes are open.
2
Check the control box is not in block condition (signalling light
B
must be off), eventually release it by means of the pushbutton
I
on
the burner’s front panel (reset).
3
Check the series of thermostats (or pressure switches) gives the signal to operation to the burner.
z
Gas operation
1
Set the
A
switch to 1 (GAS - gas operation).
2
Check the gas supply pressure is sufficient (lamp
L
on).
Burners fitted with gas proving system:
the check of the gas proving system begins; the when the check is performed
the lamp on the gas proving system, is on. At the end of the check, the startup cycle of the burner begins. In case of leakage
in a valve, the gas proving system stops the burner and the lamp B turns to on. Reset it, by means of the reset pushbutton
on the gas proving system.
3
At the beginning of start-up, the servocontrol drives the air damper to the maximum opening position, the fan’s motor starts up and
the pre-purgue phase begins. During this phase, the air damper’s complete opening is signalled by the lamp
G
on the front panel.
4
At the end of the pre-purgue phase, the air damper goes to the ignition position, the ignition transformer is energised (lamp
M
on)
and, 3 seconds later, the two gas valves
EV1
and
EV2
are energised (Lamps
F
and
E
respectively on the graphic panel) .
5
3 seconds after the gas valves opening, the transformer is turned off and the lamp M as well.
6
The burner is now in low-operation (LED
H
on),
7
8 seconds later the double-stage operation begins and the burner switches automatically to high flame (LED
G
on) or remains in
low flame operation, according to the temperature detected by the thermostats or the pressure detected by the pressure switches
(according to the boiler model).
z
Light-oil operation
1
Set the A switch to 2 (OIL - light oil operation).
2
The fan and the pump’s motors start up: the pre-purgue phase begins.
3
At the end of the pre-purgue phase, the ignition transformer is energised (lamp
H
on) and the light oil valve EVG1 is supplied (lamp
C
on).
4
Some seconds later, if the TAB thermostat is closed to high flame stage, the burner drives to high flame enablig the light oil valve
EVG2
(lamp
D
on).
5
ATTENTION:
before starting the burner up, be sure that the manual cutoff valves are open and check that the pres-
sure upstream the gas train complies the value quoted on paragraph “Technical specifications”.
