MAIN COMPONENTS
XILO 20 MC W TOP
28
20
19
18
17
16
15
25
24
LEGEND
1
Fumes pressure switch
Fan
2
Heating sensor
3
4
Total safety thermostat
Bi-thermal exchanger
5
Burner
6
7
Ignition electrodes
8
Control electrode
Automatic air bleed valve
9
10 Safety valve
7
8
7
14
12
13
26
27
21
23
22
11 No-water pressure switch
12 Circulator
13 Filling cock
14 Gas valve
15 Modulating coil
16 By-pass (optional)
17 Priority flow meter
18 Hot water sensor
19 Gas pressure reading point
20 Expansion tank
29
3
4
5
6
20
19
9
18
10
17
11
XILO 20 MCS W TOP
1
7
8
16
15
14
25
26
27
24
23
22
21 Thermohydrometer
22 Malfunction warning light
23 ON/OFF warning light
24 Lock-out warning light
25 Hot
water
potentiometer
26 Function selector
27 Heating adjustment potentiometer
28 Flue hood
29 Flue control
29
2
3
4
5
7
6
9
10
11
12
13
21
adjustment