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1.4 FUNCTIONAL DIAGRAM (fig. 2)
Fig. 2
KEY
1 Fan (vers. BF)
2Primary exchanger
4 C.H. sensor (SM1/SM2)
5 Combustion chamber
6 Gas valve
7 Water pressure valve
8 Circulator with air release vent
10 Hydrometer
11 Expansion vessel
12 D.H.W. flow meter
13 By-pass
14 D.H.W. filter
15 Boiler discharge
16 3 BAR safety valve
18 Connection plate (optional)
19 D.H.W. cock (optional)
20 Gas cock (optional)
21 C.H. flow cock (optional)
22 C.H. return cock (optional)
23 Loading system
24 D.H.W. exchanger with plates
25 C.H. filter
26 Deviator valve
CONNECTIONS
U D.H.W. outlet
E D.H.W. inlet
G Gas connection
MC.H. flow
R C.H. return
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