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MCA 35
15/06/12 - 300022160-001-01
7.4.1.
Checking the hydraulic pressure
The hydraulic pressure must reach a minimum of 0,8 bar. If the
hydraulic pressure is lower than 0,8 bar, the symbol bar flashes.
If necessary, top up the water level in the heating system
(recommended hydraulic pressure between 1,5 and 2 bar).
7.4.2.
Checking the ionization current
The ionization current is displayed in the menu #MEASURES.
¼ See chapter: "Reading out measured values", page 78
7.4.3.
Checking the tightness of the flue gas
evacuation and air inlet connections
Check the tightness of the flue gases evacuation and air inlet
connections.
T001580-A
7.4.4.
Checking combustion
The check on combustion is done by measuring the percentage of
O
/CO
in the flue gas discharge flue. To do this, proceed as follows:
2
2
1. Unscrew the plug of the flue gas measurement point.
2. Connect the flue gas analyser.
CAUTION
Ensure that the opening around the sensor is completely
sealed when taking measurements.
3. Set the boiler to full load. ¼ See chapter: "Setting the air/gas
T001581-A
ratio (Full load)", page 66. The boiler is now operating at full
load. Measure the percentage of CO
the checking values given.
4. Set the boiler to part load. ¼ See chapter: "Setting the air/gas
ratio (Part load)", page 67. The boiler is now operating on part
load. Measure the percentage of CO
the checking values given.
7. Checking and maintenance
and compare this value with
2
and compare this value with
2
97
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