C.I.B. UNIGAS - M039132CD
37
OPERATION
Key -
Fig. 49
A
Mains switch ON - OFF
B
Lockout signaling lamp
C
Reset button for flame control device (optional)
D
Minimum gas pressure switch consent signaling lamp
E
High flame operation signaling lamp (or air damper opening during pre-purge stage)
G
Low flame operation signaling lamp
H
Ignition transformer in operation signaling light
I
EV2 opening signaling lamp
L
EV1 opening signaling lamp
M
Fuse
z
Set to ON position the mains switch A on the burner electrical board front panel.
z
Check the flame control device is not in the lockout position (LED B on), if necessary reset it by means of the pushbutton C (reset),
pushing for more than 0.5 seconds but less than 3 seconds;
z
Verify that the control thermostats or pressure switches give the consent to operate to the burner.
z
Check the gas supply pressure is sufficient (LED D on).
Only burners provided with gas proving system:
the check cycle of the leakage control device starts; the completion of this check is
signalled by the light of the lamp 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 leakage control device locks and its red lamp lights.
To reset the device operate on the device pushbutton.
All burners
z
When the startup cycle begins, the servocontrol drives the air damper to the maximum opening position, the fan motor starts and the
pre-purgue phase begins.
During the pre-purgue 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-purgue phase, the air damper goes to the ignition position, the ignition transformer comes on (signalled by the
LED H) and 3 seconds later the solenoid valves EV1 and EV2 are energized (LEDs L and I on the front panel).
z
3 seconds after the opening of the valves, the ignition transformer comes off and the lamp H turns off; subsequently:
Single stage burners:
the burner is on at the maximum power; the LEDs E and G are on;
High-low flame burners:
the burner is on in low flame (LED G is on); 8 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.
Modulating burners:
they are provided with the Siemens RWF40 modulator , placed on the burner side. As for the modulator opera-
tionm see the related manual.
Fig. 49 - Burner’s control panel
Fig. 50 - Burner modulator
M
C
I
L
D
B
H
G
E
A
V1
V2
Summary of Contents for IDEA NG280
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