C.I.B. UNIGAS - M039119CE
29
OPERATION
z
Set to ON position the mains switch
A
on the burner electrical board front panel.
z
Check the control box (see
Appendix
) is not in the lockout position (LED
B
on), if necessary reset it by means of the pushbutton
C
(reset), pushing for less than 3 seconds (otherwise the control box will switch to the “Diagnostics” mode).
z
Check that the control thermostats or pressure switches start the burner up.
z
Check the gas supply pressure is sufficient (LED
D
on).
Only burners provided with gas proving system:
the gas proving system check cycle starts; when the check is accomplished it is
signalled by the light of the
LC
LED on the device. When the valves check is finished, the start up cycle of the burner begins. In the
case of a leak in a valve, the gas proving system locks and its red
LB
LED lights.
To reset the device press its reset pushbutton (See “Gas Proving System VPS504 (Option)” on page 16.)
All burners
z
When the startup cycle begins, the actuator drives the air damper to the maximum opening position, the fan motor starts and the
pre-purge phase begins.
z
During the pre-purge phase, the complete opening of the air damper is signalled by the LED
E
on the frontal panel of the electrical
board.
z
At the end of the pre-purge phase, the air damper goes to the ignition position, the ignition transformer comes on (signalled by the
LED
H
) and few seconds later the solenoid valves
EV1
and
EV2
are energized (LEDs
L
and
I
on the front panel).
z
The flame must light up in the safety time (few seconds after the gas valve opening), totherwise the gas proving system locks out.
Few seconds after the opening of the valves, the ignition transformer and the lamp
H
turn off. The burner is now on.
z
Some seconds after the gas valve opening, the burner starts the automatic operation: it drives to the high flame or low flame stage
according to the plant request (only for progressive burners - PR) or drives to the position reqired from the modulator (only fullt-
modulating burners - MD).
Single stage burners:
the burner is on at the maximum power; the LEDs
E
and
G
are on;
z
High-low flame burners:
the burner is on in low flame (LED
G
is on); some seconds later the high flame operation begins and the
burner switches automatically to high flame (LED
E
is on) or remains in low flame operation, depending on the plant needs.
z
Modulating burners:
they are provided with the Siemens RWF40 modulator , placed on the burner side. As for the modulator ope-
rationm see the related manual.
.BEFORE STARTING UP THE BURNER, BE SURE THAT THE MAIN SWITCH IS ON AND THE MANUAL SHUTOFF
VALVES ARE OPEN. READ CAREFULLY THE “WARNINGS” NOTES ON THIS MANUAL.
VPS504
LC
LB
