1.4
FUNCTIONAL DIAGRAM
"BF" model
2
3
26
4
23
20
22
U
"BFT" model - "BT100" storage tank
24
2
3
26
4
25
S3
G
96
34
24
15
1
8
9
7
5
12
6
17
21
19
E
G
M
1
15
9
8
7
12
27
21
19
M
R
KEY
11
10
19 C.H. flow cock (optional)
20 D.H.W. cock (optional)
21 Gas cock (optional)
22 Fixing jig
13
23 D.H.W. sensor
24 90°C limit stat
14
25 Condensation water trap
16
26 Gas rate adjuster
18
28 "BT100" storage tank (optional)
29 Filling cock (optional)
30 D.H.W. discharge cock
25
32 D.H.W. expansion vessel 4 liter (optional)
33 D.H.W. safety valve 7 bar (optional)
R
S3
34 Aqua Guard
11
29
10
13
14
16
13
18
22
1 Fan
2 Water-gas exchanger
3 Breather valve
4 Gas valve
5 D.H.W. exchanger
6 Diverter valve with charging
7 C.H. sensor (SM)
8 100°C safety stat
9 Air relief valve
10 Circulation pump
11 Expansion vessel
12 Safety valve
13 Boiler discharge
14 Water pressure transducer
15 Flowmeter
16 Automatic by-pass
17 D.H.W. filter
18 C.H. return cock (optional)
27 Motor-operated diverter valve
31 Magnesium anode
20
33
28
31
23
32
30
U
C
E
Fig. 2