68
Fig. 3
1.5
FUNCTIONAL DIAGRAM
1.5.1
“SOLO 20-30-40 OF/30-40 BF” version
Fig. 3/a
1.5.2
“DUETTO 20-30-40 OF/30-40 BF” version
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
Summary of Contents for DUETTO 20 OF
Page 1: ...Solo Duetto OF BF IT ES PT GB FR BE RO CERTIFICAZIONE DEL SISTEMA DI QUALITA AZIENDALE ...
Page 44: ...42 ...
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