16
13
12
11
10
9
8
7
6
5
4
3
2
1
25
B.A.I.
19
28
26
29
27
31
32
30
17
20
15
14
13
12
21
11
10
9
8
7
22
6
5
4
3
23
2
24
1
1
Filling tap
2
Safety valve
3
System drain tap
4
Three-way solenoid valve
5
Water pressure switch
6
Circulation pump
7
Gas tap
8
Ignition module
9
Burner
1 0 Ignition sparkplug-flame detector
1 1 Safety thermostat
1 2 Main exchanger
1 3 NTC heating probe
1 4 Fan (B.S.I)
1 5 Fan depression inlet (B.S.I)
1 6 Fumes thermostat (B.A.I)
1 7 Air flange (B.S.I)
1 8 Pressure switch (B.S.I)
1 9 Air vent valve
2 0 Domestic hot water expansion vessel
2 1 Heating expansion vessel
2 2 Storage boiler
2 3 Domestic hot water on/off safety valve
2 4 Storage boiler drain tap with device and hose adapter
2 5 Thermohydrometer
2 6 Domestic hot water temperature selector
2 7 Mode selector
2 8 Boiler status LED
2 9 Heating water temperature selector
3 0 Summer mode
3 1 Winter mode
3 2 Off-reset function
139
B.S.I.
19
18
BOILER OPERATING ELEMENTS
20
21
22
23
24
