MAIN COMPONENTS
LEGEND
1
Air bleed valve
2
Control electrode
3
Fan
4
Ignition electrodes
5
Board
6
Transformer
7
Fume pressure switch
8
NTC 2 return sensor
9
Heating circuit expansion tank
10 Circulating pump
11 Safety valve
12 Lack of water pressure switch
13 Filling cock
14 Drain cock
15 Hot water adjustment
16 Hydrometer
17 "-" key to reduce settings
18 "+" key to increase settings
19 "store" key to save data
20 "step" key to select parameters to be
displayed
21 "mode" key to select the program
22 Data display
23 Boiler "reset" key
24 Summer/winter selector
25 Main switch
26 90 l. water-heater
27 Hot water circuit expansion tank
28 Water-heater sensor
29 Control box
30 Water-heater safety valve
31 3-way valve
32 Condensation discharge trap
33 Gas valve
34 Aluminium boiler body
35 NTC 1 delivery sensor
34