C
Checking combustion (reduced thermal flow rate)
1. Unscrew the plug in the flue gas measurement point.
2. Connect the flue gas analyser.
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 0%.
Using the boiler according to thermal output, page 94.
4. Measure the percentage of CO
2
in the flue gases.
5. Compare the values measured with the set point values in the Con
trol and setting values table.
CO2 checking and setting values, page 62.
A tolerance of +/- 0.5% is acceptable when the front panel is
closed.
6. If necessary, modify the air/gas ratio.
Setting the air/gas ratio (maximum thermal flow rate), page 59.
Fig.
148
Connecting the flue gas analyser
2
MW-3000112-01
1
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114 7609474 - v02 - 04092014
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