29
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
24 Taken combustion test
XILO T 20 N MS W TOP
1
2
4
16
15
3
14 13
12
5
8
6
9
10
11
17
23
22
21
18
19
20
24
7
Fume analysis points