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AALBORG
INDUSTRIES
Language
UK
COMMISSIONING OM5560_97#A.2
2.2.1
Operation
of
the
burner
In automatic mode, the start/stop sequences
ofthe
burner are carried out by the control
system. A condition for the initiation
of
the start-up sequence
is
that no safety interlock
shut downs are present.
If
a safety interlock shut down
is
present, the cause must be
corrected.
The following check
of
the start-up sequence should be carefully monitored on site to
demonstrate the correct function
of
the
start~up
sequence locally.
Ste.p
A:
Start the fuel oil pump.
Step B: Start the burner froin the control system.
Step C: Check that the burner motor starts and that the servo motor opens the air
. dampers for purge
of
the boiler furnace. For visual check
of
the servomo-
torstemporarily dismount the covers.
Step D: Observe that the furnace is purged for a period
of
time (minimum 30 sec-
onds) before the servo motor closes the air damper to ignition position.
Step E: Observe that the pre-ignition time is initiated. This means the servo motor-
sare in ignition position and the ignition transformer is energised.
Step F: Check the ignItion spark between the electrodes. Use the inspection hole to
visually check the ignition spark. The ignition electrodes should be adjusted
if
necessary.
Step G: Check that the burner ignites when the solenoid valves are activated and that
it remains ignited when the power to the ignition electrodes is switched off.
If
the flame signal disappears after the end
of
the safety time the burner
is
immediately shut down.
Note: A
number
of
starts
may
be necessary before the
burner
ignites.
If
ignition
of
the
burner
fails despite
of
several attempts,
adjust
theoillair
ratio
set-
tings,
air
velocity,
and/or
oil pressure.
Step H: When firing diesel oil (DO) the oil must be atomised at a pressure
of
20 -
25
bar and on heavy fuel oil (HFO) at a pressure
of25
- 30 bar. .
Step I: The final pressure setting can be seen
in
the "Technical data" section.
Step
J:
Check that the burner is
in
ignition position after start-up.
Step K: Check that the flame does not pulsate. Adjust the oil/air ratio, and/or air
velocity
if
necessary.
Step L: Check the shape and colour
of
the flame. Measure the C02 and/or
02
content
and adjust the oil/air ratio
if
necessary.
Step M: Check the colour
of
the flue gas. Measure the soot spot No. it should not
exceed a soot spot No.
of
1-3
(Bacharach). Adjust the oil/air ratio ifneces-
sary.
Note:
The
final
adjustment
ofthe
combustion
parameters
should be
carried
out
when
the
burner
operates on heavy fuel oil as this
is
the
main
fuel.
21-51/60
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