Baxi Luna 3 Comfort, Installers And Users Instructions

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66
926.427.1 - GB inStructionS Pertaining to the inStaller
22. positioning of the ignition and flame sensing electrode
Figure 15
9912070100
The boiler has two connection points specifically designed to allow technicians to measure the combustion efficiency after
installation and ensure that the combustion products do not constitute a health risk.
One connection point is connected to the flue gas discharge circuit, and allows monitoring of the quality of the combustion
products and the combustion efficiency.
The other is connected to the combustion air intake circuit, allowing checking of any recycling of the combustion products
in case of coaxial pipelines.
The following parameters can be measured at the connection point on the flue gas circuit:
• temperature of the combustion products;
• oxygen (O
2
) or carbon dioxide (CO
2
) concentration;
• carbon monoxide (CO) concentration.
The combustion air temperature must be measured at the connection point on the air intake circuit, inserting the measurement
probe to a depth of about 3 cm.
For natural draught boiler models, a hole must be made in the flue gas discharge pipe at a distance from the boiler equal
to twice the inside diameter of the pipe itself.
The following parameters can be measured through this hole:
• temperature of the combustion products;
• oxygen (O
2
) or carbon dioxide (CO
2
) concentration;
• carbon monoxide (CO) concentration.
The combustion air temperature 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 operating the system when it is commissioned, must be sealed
in a way which ensures that the combustion product discharge pipe is airtight during normal operation.
23. check of combustion parameters
This is a high static head pump fit for installation on any type of single or double-pipe heating systems. The air vent valve
incorporated in the pump allows quick venting of the heating system.
Graph 1
24. output / pump head performances
water flow rate l/h
pu
M
p hea
D
m
h
2
o
0604_2302
Graph 2
water flow rate l/h
pu
M
p hea
D
m
h
2
o
310 Fi
0604_2303
250 Fi