First start-up
Installation, use and maintenance manual – AY
37
5
allowed only when the operation is completed.
To check and calibrate the CO
2
value at maximum and
minimum power, proceed as follows, referring to Figure
The CO
2
values and other parameters useful to verify com-
bustion are summarized in Table 5.4
▶
Power the boiler.
▶
Open the gas valve on the boiler and check that the
valves connecting to the system are open.
▶
Activate the heating request to the boiler, through the
control devices provided, and provide an adequate
thermal load for carrying out the verification opera-
tions.
▶
Insert the flue gas analyser into the flue gas analyser
socket and turn it on.
The flue gas analysis socket is positioned on the
flanged socket (detail PF, Figure 5.7
p. 37).
For the AY 100 model, each thermal module has
its own flue gas outlet and consequently its own
flue gas analysis socket. The checks of each module
must be carried out separately.
Figure 5.6
Gas valve
A
Protection screw
1
Gas flow adjustment screw
2
Offset adjustment screw
1
2
A
Figure 5.7
Socket for flue gas analysis
PF Flue gas analysis socket
PF
Table 5.4
AY combustion parameters
AY 35
AY 50
AY 100
Installation data
CO
2
percentage in fumes
Nominal heat input
G20
%
9,45 ÷ 9,25
9,3 ÷ 9,1
G25
%
9,35 ÷ 9,15
9,3 ÷ 9,1
G25.3
%
9,3 ÷ 9,1
G30
%
11,4 ÷ 11,2
11,3 ÷ 11,1
G31
%
10,55 ÷ 10,35
10,3 ÷ 10,1
Minimal heat input
G20
%
9,05 ÷ 8,85
9,0 ÷ 8,8
G25
%
9,0 ÷ 8,8
G25.3
%
9,0 ÷ 8,8
G30
%
10,75 ÷ 10,55
10,9 ÷ 10,7
G31
%
9,9 ÷ 9,7
Flue temperature
Nominal heat input
G20
°C
69,4
66,4
Minimal heat input
G20
°C
61,3
56,8
Fumes flow rate
Nominal heat input
G20
kg/h
54
80
80 (1)
Minimal heat input
G20
kg/h
7
8
8 (1)
CO emission
ppm
75,0
68,0
(1) Data refers to each thermal module.
