1.4
FUNCTIONAL DIAGRAM
1
2
3
28
4
9
18
19
G
1.5
MAIN COMPONENTS
–
+
10
9
8
7
6
5
18
4
3
2
1
7 6
24
11
8
28
15
14
10
27
2
14
12
13
16
20
R
M
5
25
23
17
22
21
26
C
U
E
11
12
13
14
15
16
17
KEY
1 Fan
2 Water-gas exchanger
3 Combustion chamber
4 Gas valve
5 D.H.W. tank
6 C.H. sensor (SM)
7 100°C safety stat
8 Air relief valve
9 C.H. pump
10 D.H.W. pump
11 Expansion vessel
12 D.H.W. safety valve
13 C.H. safety valve
14 Boiler drain
15 Water pressure transducer
16 Automatic by-pass
17 D.H.W. expansion vessel
18 Gas cock (optional)
19 C.H. return cock (optional)
20 C.H. flow cock (optional)
21 D.H.W. cock (optional)
22 D.H.W. tank drain cock
23 D.H.W. sensor (SB)
24 85°C limit stat
25 Magnesium anode
26 Fixing jig
27 Filling group
28 Non return valve
KEY
1 Control panel
2 Gas valve
3 C.H. pump
4 Non return valve
5 Burner
6 Water pressure transducer
7 Water-gas exchanger
8 85°C limit stat
9 Fan
10 Smoke pressure switch
11 C.H. expansion vessel
12 D.H.W. tank
13 100°C safety stat
14 C.H. sensor (SM)
15 Air relief valve
16 D.H.W. pump
17 D.H.W. expansion vessel
18 Ignition transformer
Fig. 2
Fig. 3
87