35
WATER CIRCUIT
1
2
3
4
5
6
7
11
14
15
16
27
17
26
13
12
10
9
8
25
F
E
D
C
B
A
21
23
24
22
20
19
18
LEGEND
A
Hot water outlet
B
Hot water re-circulation
C
Cold water inlet
D
System delivery
E
System return
F
Gas
1
100-liter heater drain tap
2
Hot water safety valve
3
Hot water expansion tank 3 lt.
4
Magnesium anode
5
System drain tap
6
Filling tap
7
Water-heater sensor
8
Water-heater thermometer sensor
9
Thermohydrometer sensor
10
Water-heater circulator
11
System circulator
12
Non-return valves
13
Delivery sensor
14
No water pressure switch
15
Automatic air bleed valve
16
Fumes pressure switch
17
Fan
18
Fume detection point
19
Fume detection flange
20
Heating expansion tank 8 lt.
21
Exchanger
22
Burner
23
Ignition electrode
24
Ionization electrode
25
Gas valve
26
Modulating coil
27
Heating safety valve
Fume analysis points