45
WATER CIRCUIT
LEGEND
A
System delivery
B
Hot water outlet
C
Gas
D
Cold water inlet
E
System return
1
Exchanger
2
Modulator coil
3
Heating sensor
4
Gas valve
5
Filling cock
6
Safety valve
7
Switching valve microswitch
8
No-water pressure switch
9
Circulator
10
Burner
11
Expansion tank
12
Fumes pressure switch
13
Fan
14
Automatic air bleed valve
15
Total safety thermostat
16
Hot water sensor
17
Drain tap
18
Pressure-operated switching valve
19
Plate exchanger
20
By-pass pipe
21
Flue control
21
1009DIS1355
XILO D 24 MC W TOP
XILO D 24 MCS W TOP
Fume analysis points