44
10
11
9
8
7
6
4
5
12
2
3
1
U
E
R
M
Fig. 3
1.5
FUNCTIONAL DIAGRAM
1.5.1
“DUETTO 30” version
7
8
13
16
15
6
6
5
4
3
2
14
1
11
12
10
9
R
M
U
C
E
Fig. 3/a
1.5.2 “AQUA 30 - 40” version
KEY
1
Boiler body
2
Hydrometer
3
Air relief valve
4
System pump
5
3-way diverter valve
6
Filling
7
Water switch
8
Safety valve
9
Instant tank
10 Expansion vessel
11 Boiler drainer cock
12 Gas-oil burner
KEY
1
Boiler body
2
Hydrometer
3
Air relief valve
4
System pump
5
Tank pump
6
Control valve
7
Tank expansion vessel
8
Tank safety valve
9
Magnesium anode
10 Tank drainer cock
11 Expansion vessel
12 Boiler drainer cock
13 Filling
14 Safety valve
15 Gas-oil burner
16 100 litre tank