7 Commissioning
45
Fig.4
9
Examples of combustion checks
Caution
To analyse the products of combustion, ensure adequate heat
exchange in the system in heating mode or in domestic water
mode (by opening one or more domestic hot water cocks) to avoid
the boiler shutting down as a result of overheating. For correct
boiler operation, the CO
2
(O
2
) content in the combustion gases
must be within the tolerance range indicated in the table below.
Activating the chimney sweep function
1. Press the two F1 + F2 keys until the function activates.
When the letter L appears on the display (followed by the flow
temperature) the boiler is working at minimum power.
Fig.
50
Minimum power
BO-0000230-1
2. Turn the
knob one notch to the right.
When the letter h appears on the display (followed by the flow
temperature) the boiler is working at maximum power in HEATING
MODE.
Fig.5
1
Maximum power in heating mode
BO-0000230-2
3. Turn the
knob another notch to the right. When the letter H
appears on the display (followed by the flow temperature) the boiler is
working at maximum power in DOMESTIC WATER MODE.
Important
This function is carried out in heating mode. During this function,
for LOW TEMPERATURE systems (such as underfloor heating),
the flow temperature is limited by setting CP000 (maximum flow
temperature).
To activate the domestic water mode, configure the setting to
GP082=1 Once finished, return the setting to GP082=0
To finish and exit the function press the F1 key.
Caution
Remember to return the setting to GP082=0 once the chimney
sweep function is no longer in use.
Fig.5
2
Maximum power in domestic water
mode
BO-0000230-3
Warning
Ensure that both flue test point plugs are in place after checking
combustion.
F1
F1
F1 F2 F3 F4
F1
F1
F1 F2 F3 F4
F1
F1
F1 F2 F3 F4
Combi 2
