NOL 18-100 HL
Page 12
•
Smoke readings should not exceed No. 2 on
low flame and No.1 on high flame on the
Bacharach Scale under steady flow
conditions.
When a satisfactory setting has been achieved
tighten the lock nuts on the adjustment device.
Check the correct function of all saftey controls and
interlocks
If the burner control panel is inclusive of Low –
Excess low and High Water interlocks and alarms,
test that these function correctly. Ensure that the
boiler feed pump switchgear provided in the panel
is operating satisfactorily.
Allow the boiler to attain the correct working
pressure/temperature and adjust the controlling
instruments to the desired values.
Finally check all ancillary controls and equipment
such as damper interlocks etc.
R
OUTINE
M
AINTENANCE
OF
NOL
B
URNERS
General
It is vitally important that personnel responsible
for the day to day operation and maintenance of
the plant are instructed by the commissioning
engineer on the basic function of the burner as well
as the need for routine maintenance and daily
checking of burner operations.
Final adjustments, which will have been made
during the commissioning, must be recorded on
the
Commissioning Sheet
at the back of this manual
and in the appliance
logbook
. A copy of the
commissioning data
must
be sent to the appliance
manufacturer.
The burner should be kept clean inside and out. It
will be more reliable, and if an oil leak occurs it
will be spotted more readily.
Inspect the burner regularly to check if there is any
variation from the correct
operating sequence
.
Check the correct oil pump pressure.
Ignition and flame should be inspected and any
irregularities observed should be rectified i.e.
nozzles and/or electrodes cleaned and any
deposits removed from the inside of the flame tube
and diffuser.
Photoelectric Cell
Remove the photoelectric cell and clean with a
soft lint free cloth if necessary. Be careful not to
touch the glass bulb of the cell as this can lead to
premature failure of the unit.
Replenishing the Fuel Supply
It is usual practice to shut boiler(s) off whilst delivery
of fuel is being made and allow approximately 30
minutes for any sediment to settle before restarting
the burners.
Boiler Combustion Surface
Keep the boiler combustion surfaces and flueways
clean. Any accumulation of soot will decrease the
efficiency of the boiler and increase the flue gas
exit temperature. Always cover up the burner
during boiler cleaning operations.
If a burner becomes troublesome then the
assistance of a qualified commissioning engineer
should be obtained. To assist in his diagnosis, notes
should be made detailing the events leading up to
the lockout situation. The symbol appearing in the
lockout window should also be noted prior to
resetting the burner.
(Refer to the Sequence
Diagram and Timing Chart).
Summary of Contents for NOL100-38
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