27
MAIN COMPONENTS
LEGEND
1
Hot water expansion tank
2
Water-heater sensor
3
Heating expansion tank
4
Delivery sensor
5
Circulator
6
Electric 3-way valve
7
Automatic By-Pass
8
Safety flow switch
9
Modulating coil
10
Gas valve
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
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
1
2
3
4
5
6
8
9
10
11
12
14
15
16
13
17
18
19
20
7
27
26
25
24
21
22
23