7
MAIN COMPONENTS
LEGEND
1
Fumes pressure switch
2
Fan
3
Heating sensor
4
Total safety thermostat
5
Exchanger
6
Burner
7
Ignition electrodes
8
Control electrode
9
Automatic air bleed valve
10
Safety valve
11
Circulator
12
Filling cock
13
Gas valve
14
Modulating coil
15
Gas pressure reading point
16
Expansion tank
17
Thermohydrometer
18
Malfunction warning light
19
ON/OFF warning light
20
Lock-out warning light
21
Fixed knob
22
Function selector
23
Heating adjustment potentiometer
XILO T 20 MS W TOP
1
2
4
16
15
3
14 13
12
5
8
7
6
9
10
11
17
23
22
21
18
19
20
1009DIS1357
