WATER CIRCUIT
XILO 20 MC W TOP
11
16
GG
4
2
7
AA
BB
LEGEND
AA
System delivery
Hot water outlet
BB
CC
Gas
DD
Cold water inlet
System return
FF
GG
By-Pass (if any)
1
Exchanger
Modulator coil
2
3
Heating sensor
4
Gas valve
Filling cock
5
6
Safety valve
17
1
3
10
15
6
5
CC
DD
FF
12
11
14
9
16
8
GG
AA
7
8
9
10
11
12
13
14
15
16
17
XILO 20 MCS W TOP
Flue gas analysis points
10
4
2
7
BB
CC
Flow meter
No-water pressure switch
Circulator
Burner
Expansion tank
Exhaust flue gas pressure switch
Fan
Automatic air bleed valve
Total safety thermostat
Hot water sensor
Flue control
45
13
1
3
15
14
9
8
6
5
DD
FF