Nu-Way NOL100-38, Installation & Maintenance Manual

Page: 11 / 24

Page 11
NOL 18-100 HL
•
Establish that the operation of plant other
than that being commissioned will not have
an adverse effect on the operation of the
plant to be commissioned and similarly, that
the operation of the plant to be
commissioned will not have and adverse
effect on other plant.
Confirm that the operation of adjacent plant
and machinery will not constitute a hazard
to the personnel involved in commissioning.
Pre-firing Checks
With the oil and power switched off, carry out the
following checks.
•
Check the nozzle size and position relative
to the diffuser plate. (The burner head
dimensional details are given on page 17).
•
Check that the electrode positions and H.T.
leads are correct.
•
Check the fan motor overload settings.
•
If the appliance is a boiler, check that the
water level is correct, the controlling valves
are open and that the water pumps are in
working order.
•
If a flue damper is fitted, check that it is
correctly interlocked to the burner or fixed
in the fully open position.
•
Ensure that there is a good oil supply to the
burner pump. Bleed one or two gallons from
the flexible to eliminate any pipe scale and
air from the system.
•
Check that the oil supply is of the
recommended temperature and pressure.
•
For single pipe systems bleed the burner
pump manually by opening a pressure port
until air-free oil flows. With two pipe
operation bleeding is automatic.
•
Switch on the electricity supply to the burner.
•
Switch on the burner at the control panel.
The hydraulic ram will remain in the low fire
position during the pre-purge period.
•
Allow the fan motor to run up to speed,
switch off the burner and check the fan
rotation (Anticlockwise as viewed from the
motor side) as the fan slows down.
•
Remove and cover the photoelectric cell with
a clean lint free cloth, switch on the burner,
and allow it to run through to lockout.
During this run check that the ignition spark
is occurring, and note oil pressures at the
moment of ignition. Reset the sequence
control and repeat the run if necessary to
check these functions. If necessary, adjust the
pump to the required pressure and recheck.
•
Replace the photoelectric cell.
THE BURNER IS NOW READY TO BE
COMMISSIONED.
Commissioning the Burner
•
Open the low flame hold switch (LFC) or
temporarily disconnect the live feed to the
H/L thermostat from its connection in the
burner terminal block.
•
Switch on the burner, the hydraulic ram will
remain in the low fire position during the pre-
purge period (approx. 30 Seconds).
•
The burner should light in the low fire
position. If ignition is not achieved refer to
the fault finding section at the rear of the
handbook
•
Check the flame visually. If the flame is dirty,
adjust the low fire stop until the flame
becomes clean.
•
Allow the burner to run until the system is at
normal operating temperature. Turn off the
burner, the flame should go out immediately
and the pressure gauge drop to, or just
above, zero.
•
Switch off the electricity supply and close the
low flame hold switch. Restart the burner and
allow the burner to change to high flame.
Adjust the high flame stop until the damper
is sufficiently open to give clean combustion.
•
Check the oil consumption. If this is not
correct for the full burner rating then further
adjustments to the fuel pressure and the high
flame stop will be required.
•
Switch the burner back to the low flame
position. The oil consumption rate should
now be up to 50% of the rated maximum.
•
The burner can now be switched between
the high and low position whilst measuring
the flue gas composition. Adjust the
combustion air volume as necessary to give
a high flame CO
2
should be within 11% and
12% and the low flame about 1% lower than
these figures.