Setting The Air/Gas Ratio (Part Load) - REMEHA Calenta 25s Installation And Service Manual

Calenta 25s - 28c - 35s - 40c
St ºC
B
B
040412 - 7600585-01
5.4.3.
1. Unscrew the plug of the flue gas measurement point.
2. Connect the flue gas analyser.
T001526-A
3. Set the boiler to part load. Press the two B keys
ºCºFh
barPsi
4. Measure the percentage of O
rpm
kWµA
l/min
± 30
T001587-A
5. If this rate does not match the required value, correct the gas/air
6. Check the flame through the flame inspection window.
O
T000933-B
Calenta 25s
Calenta 28c
Calenta 35s
Calenta 40c
O
Calenta 25s
Calenta 28c
Calenta 35s
Calenta 40c

Setting the air/gas ratio (Part load)

WARNING
Ensure that the opening around the sensor is completely
sealed when taking measurements.
simultaneously. The symbol B appears. Press the [-] key several
times until l3 is displayed on the screen.
panel removed).
ratio using the adjustment screw B on the gas valve unit.
Turn the screw B anticlockwise to obtain a lower
4
CO value.
2
Turn the screw B clockwise to obtain a higher CO
4
value.
The flame must be stable and blue in colour with orange
particles around the edge of the burner.
/CO control and setting values at part load for G20 (Gas H)
2 2
Boiler type Setting value
O (%)
2
5,9 ± 0,4
5,9 ± 0,4
5,5 ± 0,4
5,5 ± 0,4
/CO control and setting values at part load for G25 (Gas L)
2 2
Boiler type Setting value
O (%)
2
5,7 ± 0,4
5,7 ± 0,4
5,2 ± 0,4
5,2 ± 0,4
or CO in the flue gases (Front
2 2
Checking value
CO (%) O (%)
2 2
8,4 ± 0,2 5,9 ± 0,4
8,4 ± 0,2 5,9 ± 0,4
8,6 ± 0,2 5,5 ± 0,4
8,6 ± 0,2 5,5 ± 0,4
Checking value
CO (%) O (%)
2 2
8,4 ± 0,2 5,7 ± 0,4
8,4 ± 0,2 5,7 ± 0,4
8,7 ± 0,2 5,2 ± 0,4
8,7 ± 0,2 5,2 ± 0,4
5. Commissioning
2
CO (%)
2
8,4 ± 0,2
8,4 ± 0,2
8,6 ± 0,2
8,6 ± 0,2
CO (%)
2
8,4 ± 0,2
8,4 ± 0,2
8,7 ± 0,2
8,7 ± 0,2
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