10.5 RUNNiNG tHE BOiLER
Relight the boiler and allow it to run for at least 20 minutes.
COmBUStiON tESt pOiNtS
To allow the boiler to be commissioned and serviced correctly a
combustion test point is provided on the front cleaning door.
Combustion checks for the %CO
2
and smoke number can be
made using this test point.
The test point is NOT suitable for measuring flue gas temperature,
boiler efficiency or conventional flue draught.
When using the test point on the front cleaning door, the flue gas
temperature reading will be higher than that measured in the flue,
resulting in an inaccurate efficiency reading.
To obtain an accurate flue gas temperature and efficiency value,
the combustion reading can only be taken outside through the low
level flue terminal.
With high level and vertical balanced flues, the combustion
reading may be taken from the flue test point provided . Refer to
Section 2.3.
For Conventional flues, flue draught, combustion and efficiency
measurement, a test point is provided in the conventional flue
connector section. See Figure 9-8.
COmBUStiON CHECKS
1. Using a smoke pump check the smoke number. It should be
0-1 on the smoke scale.
2. If the smoke number is satisfactory, check the %CO
2
in the
flue gases using a combustion analyser.
3. If necessary, adjust the %CO
2
to the value given in Section
2.2 for the boiler concerned.
4. To adjust the %CO
2
; use the hexagonal Allan key (supplied
with the boiler) to adjust the burner air damper (refer to
Figures 3-7 and 3-8) as required.
5. Turning the air damper adjustment screw anti-clockwise
closes the damper and increases the %CO
2
level. Turning
the air damper adjustment screw clockwise opens the
damper and reduces the %CO
2
level.
6. Re-check the smoke number if the air damper has been
moved. Under no circumstances may the smoke number be
above 1.
! NOtE !
it is essential that the air damper is correctly set for clean
and efficient operation of the boiler.
10.6 BaLaNCiNG tHE SYStEm
When the boiler has been adjusted and is running correctly:
1. Balance the central heating system by adjusting the radiator
lock shield valves.
2. Start with the radiator nearest the boiler and adjust the
valves to achieve the required temperature drop across each
radiator.
3. If thermostatic radiator valves have been installed, check the
system bypass is correctly set.
4. Switch off the boiler.
10.7 COmpLEtiON
With the system hot:
1. Check again for leaks, rectifying where necessary.
2.
Drain the system while it is hot to complete the flushing
process. Refer to Section 4.9.
3.
Refill and vent (and pressurise if a sealed system) the
system.
4. A suitable central heating system inhibitor must be added to
protect the system against the effect of corrosion.
5. Consideration should be given to using a suitable antifreeze
to prevent damage to the boiler installed in garages, out-
houses, etc. in areas where electrical power failure can occur
in winter months.
6. Replace the upper front panels as necessary.
! NOtE !
after commissioning the boiler, complete the information
on the rear cover of the User Handbook.
also complete the OFtEC CD/11 commissioning report.
Leave the top copy with the user and retain the carbon
copy for your records.
7. If the boiler is to be left in service with the user, set the
controls, timer (or programmer if fitted) and room thermostat
(if fitted) to the User’s requirements.
8. If the boiler is not to be handed over immediately shut off the
boiler fuel supply valve and switch off the electricity supply.
! CaUtiON !
if there is any possibility of the boiler being left during frost
conditions, then the boiler and system should be drained.
alternatively, a suitable antifreeze should be used.
Section 10: Commissioning
page 36
Summary of Contents for Vortex VTXBH1521
Page 51: ...Notes Page 51 NOTES...
