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GAS VALVE CALIBRATION
- Connect the boiler to the power supply
- Open the gas tap
- Set the function selector to
- Loosen the screws (E), remove the housing, then lower the instrument
panel towards you (fig. 14)
- Loosen the fixing screws on the cover (F) to access the terminal board (fig. 16)
- Press the CO button (fig. 26)
Live electrical parts (230 V AC).
- Wait for burner ignition.
The display shows "ACO" and the yellow LED flashes. The boiler oper-
ates at maximum heat output.
The "combustion analysis" function remains active for a limited time (15
min); if a delivery temperature of 90°C is reached, the burner is switched
off. It will be switched back on when this temperature drops below 78°C.
- Insert the analyser probe in the ports provided in the air distribution box,
after removing the screws from the cover (fig. 40)
- Press the "combustion analysis" button a second time to reach the num-
ber of rotations corresponding to the maximum domestic hot water output
(table 1); the yellow LED continues to flash while the red LED is fixed
value: (table 3) if the value does not match the value
- Check the CO
2
given in the table, use the gas valve maximum adjustment screw
- Press the "combustion analysis" button a third time to reach the number
of rotations corresponding to the minimum output (table 2); the yellow
LED continues to flash while the green LED is fixed
- Check the CO
value: (table 4) if the value does not match the value
2
given in the table, use the gas valve minimum adjustment screw
- To exit the "combustion analysis" function, turn the control knob
- Remove the flue gas probe and refit the plug
- Close the instrument panel and refit the housing.
The "combustion analysis" function is automatically deactivated if the
board triggers an alarm. In the event of a fault during the combustion anal-
ysis cycle, carry out the reset procedure.
The boiler is supplied with the adjustments shown in the table. Depending on plant engineering requirements or regional flue gas emission limits it is,
however, possible to modify this value, referring to the graphs below.
HTG curve (Qnheating) - 25kW
6400
6000
5600
5200
4800
4400
4000
3600
3200
2800
2400
2000
1600
1200
4
6
8
CO s.a. curve (Qnheating) - 25kW
200
190
180
170
160
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
4
6
8
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(OFF/RESET) (monitor off)
10
12
14
16
18
20
Heat output (kW)
10
12
14
16
18
20
Heat output (kW)
manuals search engine
table 1
MAXIMUM NUMBER OF
FAN ROTATIONS
25 KIS
heating - DHW
29 KIS
heating - DHW
table 2
MINIMUM NUMBER OF
FAN ROTATIONS
25 KIS
29 KIS
table 3
Max. CO
25 KIS
29 KIS
table 4
Min. CO
25 KIS
29 KIS
table 5
Slow switch-on
25 KIS
29 KIS
6400
6000
5600
5200
4800
4400
4000
3600
3200
2800
2400
2000
1600
1200
4
6
22
24
26
CO s.a. curve (Qnheating) - 29kW
200
190
180
170
160
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
4
6
8
22
24
26
METHANE
LIQUID GAS
GAS (G20)
49 - 61
53 - 62
METHANE
LIQUID GAS
GAS (G20)
14
14
METHANE
LIQUID GAS
2
GAS (G20)
9,0
9,0
METHANE
LIQUID GAS
2
GAS (G20)
9,5
9,5
METHANE
LIQUID GAS
GAS (G20)
40
40
HTG curve (Qnheating) - 29kW
8
10
12
14
16
18
20
Heat output (kW)
10
12
14
16
18
20
22
Heat output (kW)
ENGLISH
(G31)
49 - 61
rpm
52 - 60
rpm
(G31)
14
rpm
14
rpm
(G31)
10,5
%
10,5
%
(G31)
10,5
%
10,5
%
(G31)
40
rpm
40
rpm
22
24
26
28
30
24
26
28
11
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