C
Respect the torque of the burner fastening screws: 5 N.m +/- 0.5.
Always use a new tightness gasket to reconnect the gas supply.
3. Reconnect the ignition electrode, the safety thermostat on the com
bustion chamber door and the flame detection sensor.
Do not forget to remount the ignition transformer on the burner.
4. Open all valves.
5. Check the tightness of the burner using a leak detection spray.
6. Put the covers back in place on the boiler.
For the POWER HT+ 1.50 and POWER HT+ 1.70 models, put the
panel located in front of the burner back in place.
7. Reconnect the ground wire.
8. Start up the boiler again.
Commissioning procedure, page 57.
10.2.7 Check the combustion
Checking combustion (maximum 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 100%.
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.
146
Connecting the flue gas analyser
2
MW-3000110-01
1
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112 7609474 - v02 - 04092014
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