Baxi MainEco Combi 24 Installation And Service Manual page 49

Baxi MainEco Combi and System 24 - 28 - 35 / 18 - 24
Verify Flue Integrity
Indication that products of combustion & inlet
air are mixing - further investigation is
required. Check all flue components are
correctly assembled, fixed & supported.
Check the flue & terminal are unobstructed.
Is O ≥ 20.6% and
2
CO < 0.2% ?
2
No
TURN APPLIANCE OFF !
Call 0844 871 1555 for advice.
The appliance MUST NOT be commissioned
until all problems are identified and resolved.
Verify Integrity of Seals
Check all burner seals, internal flue seals,
door & case seals. Replace any seals that
appear unsound.
Is CO < 350ppm
and CO/CO
< 0.004 ?
No
TURN APPLIANCE OFF !
Call 0844 871 1555 for advice.
The appliance MUST NOT be commissioned
until all problems are identified and resolved.
If commissioning cannot befully completed
the appliance must be disconnected from the
gas supply in accordance with the GSIUR.
Note: Check & record the CO & combustion
ratio at both maximum & minimum rates
before calling 0844 871 1555.
02092014 - 7619497-02
Set Boiler to Maximum Rate
Allow the combustion to stabilise. Do not insert probe to avoid
Perform Flue Integrity Combustion Check
Insert the analyser probe into the air inlet test point,
allowing the reading to stabilise.
No
Yes
No
Yes
ratio
2
'flooding' the analyser.
Yes
Is O ≥ 20.6% and
2
CO < 0.2% ?
2
Yes
Is CO < 350ppm
and CO/CO ratio
2
< 0.004 ?
Check CO & Combustion Ratio at
Maximum Rate
Whilst the boiler is still operating at maximum
insert the analyser probe into the flue gas
test point, allowing the reading to stabilise.
Set Boiler to Minimum Rate
Allow the combustion to stabilise. Do not
insert probe to avoid 'flooding' the analyser.
Check CO & Combustion Ratio at
Minimum Rate
Whilst the boiler is operating at minimum
insert the analyser probe into the flue gas
test point, allowing the reading to stabilise.
Is CO < 350ppm
and CO/CO
< 0.004 ?
BOILER OPERATING SATISFACTORILY.
NO FURTHER ACTION REQUIRED
Ensure test points are capped, the boiler
case front panel is correctly fitted & secured
and all other commissioning procedures
completed. Complete the 'Benchmark'
Checklist, recording the CO & combustion
ratio readings as required.
6. Commissioning
ratio
2
R000715-A
47