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AALBORG
INDUSTRIES
Language UK
COMMISSIONING'
_ . OM5560,,:97#A.2
is too far back, the combustion air velocity is too low and the combustion characteristics
become worse (02 content is too high).
The following commissioning steps imply that the lighting-up procedure
ofthe
boiler
is completed and that a sufficient load demand is present to carry out adjustments
at
100% load.
Step
A: ,Start the burner and check that it ignites when the ignition is on and the oil
valves are activated. It must also be checked that the burner remains ignited
when the ignition sequence step is completed. Adjust the oil/air ratio setting
in the control system, and/or the air velocity
if
necessary.
Step
B: Start the burner several times to ensure a reliable ignition
of
the burner.
Step
C:
Check that the flame is stable and does not pulsate when the burner operates
at ignition load. Carry out measurements
ofthe
soot spot No. and
02
content
and/or
C02
content. Adjust the oil/air ratio setting in the control system, and/
or the air velocity
if
necessary.
Step
D: The shape and colour
of
the flame must also be checked, adjust
if
necessary.
Note:
If
the
position
of
the
adjustment
ring
has
to
be
altered
in relation
to
the
diffuser disc,
the
air
velocity
and
quantity
in
the
combustion
head
will
change.
Check
the
combustion values
by
means
of
flue
gas
analysis
and,
if
necessary,
adjust
the
combustion
air
quantity
to
be
adequate.
Step
E:
Carry out the same measurements through the complete burner range in steps
of
10% (from minimum load to full load). Adjust the oil/air ratio settingin
the control system
if
necessary.
Step
F:
Operate the burner as described in the chapter "Manual operation".Carry out
measurements when the burner operates in ignition position. Adjust the oil/
air ratio setting in the control system
if
necessary.
2.3.3
Check
the
safety
interlock
shut
down for low
and
high oil
temperature
Step
A: Decrease the temperature gradually on the temperature controller located in
the control system until the set point for low shut down is reached. The
burner stops, and a shut down is indicated in the control system.
2.3.4
Check
the
safety interlock
shut
down for
the
pre-heater
limit
thermostat
Step
A: When the burner is in operation, check the high temperature limit thermostat
by dismantling one
ofthe
wires at the terminals. The burner stops, and a shut
down
is indicated in the control system.
Step
B: Connect the wire again and reset the shut down
2.3.5 Additional function checks
Step
A: Check/adjust additional safety interlock shut downs
if
provided. A number
of
shut downs might be included in the safety interlock circuit depending on
the specified function and/or the classification society.
21-55/60
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