33
32
3
1
2
4
12
7
10
13
8
9
11
5
6
18
17
16
15
14
19
27
26
25
24
23
22
21
20
28
30
29
31
LEGEND :
1 – Main heat exchanger
2 - Burner
3 – Ignition electrodes
4 – Flame detection electrodes
5 – Modulating gas valve
6 – Spark generator
7 - Siphon
8 – Domestic hot water tank
9 – Water tank valve
10 – Heating flow thermistor
11 – Tank thermistor
12 – Hot water control thermistor
13 - Pump
14 – Secondary plate heat exchanger
15 – DHW activator
16 – Heating return thermistor
17 – Heating expansion vessel
18 – Three way valve
19 – Heating safety valve
20 – Pressure jauge
21 – Electrical box
22 – Overheat safety device
23 - Fan
24 – Fumes box
25 – Flue pipe
26 - By-pass
27 – Non return valve
28 – Gas tap
29 – Heating return tap
30 – Heating flow tap
31 – Water service tap
32 – DHW expansion kit
14.
WATER CIRCUIT DIAGRAMS
