MAIN COMPONENTS
3
2
1
11
24
23
LEGEND
1
Hot water expansion tank
Water-heater sensor
2
3
Heating expansion tank
Delivery sensor
4
5
Circulator
Electric 3-way valve
6
Automatic By-Pass
7
8
Safety flow switch
9
Modulating coil
10 Gas valve
10
9
8
25
26
27
22
21
11 Hot water circuit:
- 8-bar safety valve
- Non-return valve
- Inspection filter
12 Stainless steel water-heater
13 Taken combustion test
14 Fume pressure switch
15 Fume fan
16 Fume exchanger
17 Total safety thermostat
4
12
5
6
7
18 Control electrodes
19 Ignition electrodes
20 Burner
21 Malfunction warning light
22 ON/OFF warning light
23 Lock-out warning light
24 Hot water adjustment potentiometer
25 Function selector
26 Heating adjustment potentiometer
27 Thermohydrometer
27
13
14
15
16
17
18
19
20