23
2.3.
Hydraulic scheme
1.
Condensate drain siphon
2.
Modulating gas valve
3.
Safety thermostat
4.
Flow temperature sensor
5.
Modulating fan
6.
Primary condensing exchanger
7.
Flue gas temperature probe
8.
Ignition and detection electrode
9.
Expansion vessel
10.
Fan control sensor
11.
Return temperature sensor
12.
3 bar safety valve
13.
Pressure transducer
14.
Deaerator
15.
Circulator
16.
Drain cock
17.
Filling cock
18.
Cold water flow meter
19.
Secondary plate exchanger
20.
Domestic hot water temperature sensor
21.
Automatic by-pass integrated on plate heat
exchanger
22.
Motorized 3-way valve
S
G
M
C
F
R
Condensate drain
Gas inlet
Heating system delivery
Domestic hot water outlet
Cold water inlet
Heating system return
Play 24 - Play 28 - Play 32