Baxi Nuvola 3 BS 280 Fi User Manual

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7113868.01 - en
INSTRUCTIONS FOR FITTERS
22. POSITIONING THE IGNITION AND FLAME-SENSING ELECTRODE
Figure 14
9912070100
To measure combustion performance and the toxicity of the products of combustion, the forced-ow boilers are tted with
two dedicated taps on the concentric connector.
One connection point is connected to the exhaust duct and is used to measure combustion efciency and the toxicity of
the products of combustion.
The other is connected to the air intake circuit and is used to check for the presence of any products of combustion circu-
lating in installations with co-axial ues.
The following parameters can be measured at the connection point on the ue gas circuit:
rUFNQFSBUVSFPGUIFQSPEVDUTPGDPNCVTUJPO
rDPODFOUSBUJPOPGPYZHFO0
2
) or, alternatively, carbon dioxide (CO
2

rDPODFOUSBUJPOPGDBSCPONPOPYJEF$0
The combustion air temperature must be measured at the connection point on the air intake circuit, inserting the measu-
rement probe to a depth of about 3 cm.
For natural draught boiler models, a hole must be made in the exhaust ue at a distance from the boiler equal to twice
the internal diameter of the ue.
The following parameters can be measured through this hole:
rUFNQFSBUVSFPGUIFQSPEVDUTPGDPNCVTUJPO
rDPODFOUSBUJPOPGPYZHFO0
2
) or, alternatively, carbon dioxide (CO
2

rDPODFOUSBUJPOPGDBSCPONPOPYJEF$0
The temperature of the combustion air must be measured close to the point where the air enters the boiler.
The hole, which must be made by the person in charge of the system during commissioning, must be sealed so as to
ensure that the exhaust duct is airtight during normal operation.
23. CHECKING COMBUSTION PARAMETERS

Baxi Nuvola 3 BS 280 Fi Specifications

General

Brand	Baxi
Model	Nuvola 3 BS 280 Fi
Category	Boiler
Language	English