Nu-Way PO160, Installation & Maintenance Manual

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Page D.5 P Series Commissioning
7. Reset the sequence controller and allow the
burner to start pump. Immediately the burner
starts, switch the ‘hand/auto’” selector to the
‘hand’ position and hold the low flame until
the appliance is ready to accept high flame.
During this period check and adjust the low
flame oil throughput.
8. Check flame visually. If flame is not clean,
adjust the air cam. When a satisfactory flame
is achieved, again check line and spill
pressures. The oil consumption rate should
now be between 40 and 50% of the rated
maximum.
9. Measure flue gas composition and adjust air
as necessary.
10. Use the ‘inching’ switch to modulate to high
flame and adjust the air cam to give a
reasonable flame.
11. Check the oil consumption. If this is not
correct for the full burner rating the oil cam
must be adjusted as follows:-
12. ‘Inch’ burner to low flame, and carefully note
spill pressure. To increase the minimum rate
adjust as shown in the diagram. Adjust to
give more eccentricity for more oil at high
flame, and vice versa.
13. Return to minimum setting and compensate
for any changes.
14. ‘Inch’ the burner to high flame and again
check oil flow.
15. Continue to repeat the above procedure until
the high flame oil rate is correct.
16. ‘Inch’ the burner to two or three intermediate
positions between low and high flame, and
adjust the air cam at each position to give
the desired flue gas analysis.
17. Check burner performance through the
range, adjust air can as necessary and secure
the thumbscrews by means of the grub
screws.
Checking The Flame Signal
1. Check that electrical power is off.
2. Open the ‘Terminal/Ignitor Box Unit’ panel
and disconnect the wire from terminal 20.
3. Connect a DC micro-ammeter between
terminal 20 and the wire that has been taken
from terminal 20.
4. Establish the electrical supply and switch on
the burner. Allow the burner to light and
operate normally.
5. Observe the reading on the micro-ammeter
at all firing levels. A steady reading in excess
of 7 microamps is satisfactory. Lower readings
may cause intermittent burner lock-out and
indicate a need for adjustment of the burner
settings - refer to Section E, Operation and
Maintenance.
6. Switch off the burner and the electrical power
supply to the burner. Disconnect the micro-
ammeter and replace the wire in terminal 20.
7. Close the ‘Terminal/Ignitor Box Unit’ panel.
Setting The Air Pressure Switch
1. Check that the electrical supply to the control
panel off and that the burner is off.
2. Remove the air pressure switch cover.
3. Fit a manometer or other approved pressure
measuring instrument to the pressure switch
so that the actual measured air pressure can
be compared to the pressure switch dial
setting.
4. Check that the Hand/Auto switch is set to
Hand operation.
5. Switch on electrical supply to the control
panel. Switch on the burner, allow the burner
to proceed through its sequence until it is
operating at low flame.
6. Slowly turn the adjusting dial on the air
pressure switch clockwise until the flame is
extinguished.
7. The burner will go to lock-out.
8. Turn the dial one division anti-clockwise and
re-set burner lock-out. The burner will then
continue through its cycle until either the start
rate flame is established or burner goes to its
lock-out position.
If the burner goes to lock-out, repeat the
procedure (turning the dial one division)
once per burner cycle until start rate flame is
established.
9. Allow the burner to cycle to low flame and
then turn the adjusting dial a further two
divisions anti-clockwise.
10. Switch off electrical supply to the control
panel and to the burner.
11. Replace the air pressure switch cover.