69
IT
ES
PT
GB
1
2
3
4
22
5
7
8
11
14
10
9
6
16
12
18
15
13
19
21
20
17
U
E
G
M
R
27
1.4
FUNCTIONAL DIAGRAM
Fig. 2
KEY
1 Fan
2 Main exchanger
3 Combustion chamber
4 Gas valve
5 D.H.W. plate exchanger
6 Divertor valve with charging
7 C.H. sensor (SM)
8 100°C safety stat
9 Air relief valve
10 Pump
11 Expansion vessel
12 Safety valve
13 Boiler discharge
14 Water flow switch
15 Thermohydrometer
16 Automatic by-pass
17 D.H.W. filter
18 C.H. return cock (optional)
19 C.H. flow cock (optional)
20 D.H.W. cock (optional)
21 Gas cock (optional)
22 Fixing jig
27 Aqua Guard Filter System