C.I.B. UNIGAS
- M039213CB
39
The burner is now operating, meanwhile the actuator goes to the high flame position and, after some seconds, the two-stage ope-
ration begins; the burner is driven automatically to high flame or low flame, according to the plant requirements.
Operation in high or low flame is signalled by lamp
N
on the frontal panel.
Light oil operation
The fan motor starts and the pre-purge phase as well. Since the pre-purge phase must be carried out at the maximum air rate, the
control box drives the actuator opening and when the maximum opening position is reached, the pre-purge time counting starts.
At the end of the pre-purge time, the actuator is in the light oil ignition position: the ignition transformer is energised (lamp
L
on); the
light oil valves open. Few seconds after the valves opening, the transformer is de-energised and lamp
L
turns off.
The burner is now operating, meanwhile the actuator goes to the high flame position; after some seconds, the two-stage operation
begins; the burner is driven automatically to high flame or low flame, according to the plant requirements.
Operation in high or low flame is signalled by LED
N
on the burner control panel.
Fig. 31 - - Burner control panel
Keys
A
Main switch (0=Off, 1=GAS, 2=OIL)
B
CMF switch (0=stop, 1=low flame, 2=high flame, 3=automatic) - fully modulating burners only
C
Control box reset pushbutton
D
Gas proving system reset pushbutton (only for burners with Siemens LDU11 provided)
E
Gas proving system lockout signalling lamp
F
Gas valves EV1/EV2 operation signalling lamp
G
Gas pressure switch signal lamp
H
Oil valve EVG operation signalling lamp
I
Thermal cutout intervention signalling light CTV
L
Ignition transformer operation signalling lamp
M
Low flame operation signalling lamp
N
High flame operation signalling lamp
O
Burner lockout signalling lamp
P
Stand-by signalling lamp
Q
Siemens RWF40 Modulator (fully modulating burners only - see related attached manual)
C
D
A
B
E
F
G
H
I
L
M
N
O
P
Q
Summary of Contents for HR93A
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