42
6.3.
Checking combustion efficiency
6.3.1.
flue cleaning function
The boiler features a flue cleaning function which must be used to measure in situ combustion efficiency and to set the burner. To activate the
flue cleaning function, press and hold the buttons “info” and “Reset” simultaneously for 3 seconds. The flow temperature and the symbol
are
shown on the LCD.
When the flue cleaning function is activated, with the boiler in WINTER
or SUMMER
mode, the boiler performs the ignition sequence
and then operates at a fixed power output predetermined by the parameter P1 (maximum CH output).
To exit the flue cleaning mode, press “Reset” or wait 15 minutes.
6.3.2.
Measurement procedure
The boiler is equipped with a tower allowing for air intake/flue gas discharge duct connection (fig. 22 and 22a).
The tower is designed with two pre-arranged openings directly accessing air and flue gas ducts.
Remove cap A from the pre-arranged openings on the tower, before starting combustion checking procedure (fig. 22).
In order to verify combustion efficiency the following measurements must be implemented:
- assess combustion air from no. 1 opening (fig. 22a).
- assess flue gas temperature and CO
2
from no. 2 opening (fig. 22a).
Allow boiler to reach working temperature before taking any measurement.
1
2
A
fig. 22a
fig. 22
fuel
CO
2
O
2
Natural gas
9.0 to 9.3
Propane
9.7 to 10.3
Table 13 – CO
2
- O
2
rates
Summary of Contents for Antea 24kW Range
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