Baxi POWER HT+ Series Installation And Service Manual page 60

7 Commissioning
Fig.64 Connecting the flue gas analyser
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MW-3000044-01
1. Unscrew the left-hand plug, which corresponds to the flue gas
measurement point connection.
2. Connect the flue gas analyser to the connection on the left.
N N ote
Ensure that the opening around the sensor is completely sealed
when taking measurements.
Insert the sensor into the flue gas measurement point opening
to at least 8 cm for POWER HT+ 1.50 and POWER HT+ 1.70.
Insert the sensor into the flue gas measurement point opening
to at least 9 cm for POWER HT+ 1.90 and POWER HT+ 1.110.
3. Set the boiler's thermal flow rate to 100%.
See
Using the boiler according to thermal output, page 94.
4. Measure the percentage of CO
5. Compare the values measured with the set point values in the Con­
trol and setting values table.
See
CO2 checking and setting values, page 62
Note
A tolerance of +/- 0.5% is acceptable.
6. If necessary, adjust the air/gas ratio using the gas flow rate adjust­
ment screw.
See
Gas valves, page 62.
Note
Turn the gas adjustment screw clockwise to reduce the CO
content.
Turn the gas adjustment screw counter-clockwise to increase
the CO content.
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Note
A tolerance after adjustment of +/- 0.2% is acceptable, when the
front door is removed.
in the flue gases.
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