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9.10 Checking the flue expulsion
pipe
Have the integrity of the flue outlet pipe air in-
take pipe, checked periodically, at least once
a year. For all the above maintenance opera-
tions it is advisable to call an approved Ser-
vice Engineer.
9.11 Combustion analysis check
Carry out performance checks at the intervals
provided by the laws in force.
• Connect a flue analyser to the flue analysis
outlets on the flue exhaust of the boiler Fig.
9.15.
Fig. 9.15
• Activate the "chimney sweep function" at
maximum heating power (see "Setting the
boiler chimney sweep function" to page
85).
• Make sure that the ambient thermostat is in
the position "call for heat".
• Withdraw an abundant amount of d.h.w. by
opening the faucets.
• Check the combustion of the boiler using the
outlets located on the flue tubes (Fig. 9.15)
and compare the data measured with that
following.
- 84 -
MAINTENANCE
Flue analysis
points
Model Inovia 25C
Nominal heat input
(A) (E)
Nominal efficency
Combustion efficency
Air index
Flue gas CO
content
2
Flue gas O
content
2
Flue gas CO content
Flue gas temperature
Values refer to tests with a an 80 mm double exhaust
split by 1 + 1 m and natural gas G20 and a supply /
return heating temperature of 60°/80°C
Fig. 9.16
Model Inovia 30C
Nominal heat input
(A) (E)
Nominal efficency
Combustion efficency
Air index
Flue gas CO
content
2
Flue gas O
content
2
Flue gas CO content
Flue gas temperature
Values refer to tests with a an 80 mm double exhaust
split by 1 + 1 m and natural gas G20 and a supply /
return heating temperature of 60°/80°C
Fig. 9.17
Model Inovia 35C
Nominal heat input
(A) (E)
Nominal efficency
Combustion efficency
Air index
Flue gas CO
content
2
Flue gas O
content
2
Flue gas CO content
Flue gas temperature
Values refer to tests with a an 80 mm double exhaust
split by 1 + 1 m and natural gas G20 and a supply /
return heating temperature of 60°/80°C
Fig. 9.18
kW
20,0
%
97,4
%
97,6
n
1,23
%
9,2 - 9,8
%
3,9
ppm
120
°C
76,0
kW
25,0
%
97,4
%
98,2
n
1,23
%
9,2 - 9,8
%
3,9
ppm
120
°C
74,0
kW
30,0
%
98,2
%
98,3
n
1,23
%
9,2 - 9,8
%
3,9
ppm
175
°C
81,6
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