1.5
FUNCTIONAL DIAGRAM
1.5. 1
"SOLO 20-30-40 OF/30-40 BF" version
1.5.2 "DUETTO 20-30-40 OF/30-40 BF" version
68
KEY
1 Boiler body
2 Filling
3 Safety valve
4 Air relief valve
5 Expansion vessel
6 Gas-oil burner
7 System pump
8 Hydrometer
9 Boiler drainer cock
10 Water switch
KEY
1 Boiler body
2 Filling
3 Safety valve
4 Air relief valve
5 Expansion vessel
6 Gas-oil burner
7 System pump
8 Hydrometer
9 Boiler drainer cock
10 C.H. water switch
11
D.H.W.
water switch
12 Instant tank
13 3-way diverter valve
Fig. 3
Fig. 3/a