
46
LEGEND
1
Air bleed valve
2
Control electrode
3
Fan
4
Ignition electrodes
5
Control box
6
Ignition transformer
7
Fume pressure switch
8
NTC 2 return sensor
9
NTC 3 hot water sensor
10
Water trap for condensate discharge
11
Circulating pump
12
Lack of water pressure switch
13
Filling cock
14
Hydrometer
15
NTC 1 delivery sensor
16
Expansion tank
17
3-way valve
18
Water-heater
19
Gas valve
20
Aluminium boiler body
21
Hot water expansion tank
22
Heating safety valve
23
6 bar safety valve
24
Air release
A
3/4” Ø system delivery
B
1/2” Ø hot water outlet
C
3/4” Ø gas inlet
D
1/2” Ø cold water inlet
E
3/4” Ø system return
MAIN COMPONENTS
14
21
23
22
13
B
D
C
E
A
16
17
24
9
5
2
4
6
18
15
7
3
19
20
10
12
8
1
11