Section 10: CommissioningPage 40
7. The air adjuster disc is re-positioned as follows:
• Remove the screw from the centre of the air adjuster
disc.
• Re-position the disc so that the correct cut-out is located
against the moulded boss on the fan housing.
• Replace the screw in the centre of the air shutter disc
and tighten.
8. If the 15-26 model is to be set to 26kW, the air adjuster disc
is not required. It should be removed from the burner and
discarded.
9. Re-t the air inlet cover to the side of the burner and secure
in place using the two screws.
10. If the other burner commissioning steps outlined in this
section have been completed, the burner can now be re-tted
to the boiler and secured using the burner xing nut
10.5 SWITCHING ON
1. Check that all system controls are calling for heat and turn
the boiler thermostat to maximum.
2. Switch on the electricity supply to the boiler.
3. Set the boiler On/O switch to ON. A neon on the switch
lights when it is in the ON position. The boiler will now light
automatically.
Note that the neon lights when the boiler is switched on, but
does not necessarily indicate the burner is ring.
The burner should then re. Open the vent screw on the vent
manifold to vent the supply while the oil pump is running
4. The burner fan should start and the burner should light within
about 12 seconds. If the burner does not light and the ‘Lock-
out’ reset button on the burner lights, wait about 45 seconds
and press the reset button to restart the ignition process.
This procedure may have to be repeated several times
during rst lighting.
5. With the burner alight, check the fuel pressure. Refer to
Section 2.2 (burner settings).
6. Adjust the pressure if necessary - refer to Section 11.9
(burner components).
! NOTE !
It is important that the oil pressure is correctly set.
7. Operate the boiler until it reaches normal operating
temperature. Check oil supply/return pipe for leaks, rectifying
where necessary.
8. Check the operation of the boiler thermostat. Ensure that by
turning it anticlockwise it switches the burner o.
9. With the burner alight, re-check the fuel pressure and re-
adjust if necessary. Turn the boiler o, remove the pressure
gauge and replace the plug in the pump.
10. Ensure that there are no oil leaks, replace the burner cover.
11. On balanced ue installations - Ensure the exible air inlet
tube is correctly connected to both the burner air inlet and the
ue system.
10.6 RUNNING THE BOILER
1. Relight the boiler and allow it to run for at least 20 minutes.
2. Check the smoke number, if it is 0-1 then it is satisfactory.
3. Using a calibrated electronic ue gas analyser, set to the
correct fuel, check the %CO
2
in the ue gases.
! NOTE !
To allow the boiler to be commissioned and serviced
correctly a combustion test point is provided on the front
cleaning door. Both the %CO
2
and smoke test may all be
carried out using this test point.
This test point is not suitable for measuring boiler
eciency or conventional ue draught.
4. When using the test point on the cleaning cover note that
the ue gas temperature reading will be higher than that
measured in the ue thus resulting in an inaccurate eciency
reading. To obtain an accurate ue gas temperature and
eciency, the reading can only be measured outside
through the low level ue terminal (or the test point on the
conventional ue starter section when used).
5. For high level and vertical balanced ues, the reading may
be taken from the ue test point provided on the ue system.
Refer to Section 9.
6. For conventional ues, a test point is provided in the
conventional ue adaptor for ue draught and ue gas
temperature measurement. Refer to Section 9.
7. Set the %CO
2
, as indicated on the ue gas analyser, to
the required value as given in Section 2.2 for the boiler
concerned.
8. Adjust the burner air damper, using the hexagonal key
supplied, to achieve the required %CO
2
. Refer to Section
11.9.
9. To increase the %CO
2
:
• Turn the screw anti-clockwise. This will close down the
burner air damper and decrease the combustion air
entering the burner.
To decrease the %CO
2
:
• Turn the screw clockwise. This will open up the burner
air damper and increase the combustion air entering the
burner.
10. When the %CO
2
is set to the correct level, re-check the
smoke number if the burner air damper has been moved.
Under no circumstances must the smoke number be above
1.
! NOTE !
For safe and ecient operation of the boiler it is essential
that the air damper is correctly set to give the required
%CO
2
in the ue gases.
10.7 BALANCING THE SYSTEM
1. When the boiler has been adjusted and is running
satisfactorily, balance the central heating system by adjusting
the radiator lock shield valves. Start with the radiator nearest
the boiler and adjust the valves to achieve the required
temperature drop across each radiator. If thermostatic
radiator valves have been installed, check the system
bypass.
2. Switch o the boiler.
To Next Page
Loading...
Need help?
General