Nu-Way NOL100-38, Installation & Maintenance Manual

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.