35
925.220.4 - EN
*/4536$5*0/41&35"*/*/(505)&*/45"--&3
Key:
1
D.H.W. priority sensor
2
Water pressure switch
3
Three way valve
4
D.H.W. NTC sensor
5
Flow sensor with filter and water flow rate limiter
6
Three way valve motor
7
Gas valve
8
Expansion vessel
9
Ignition electrode
10
Central heating NTC sensor
11
Overheat safety thermostat
12
Flue-water exchanger
13
Flue hood
14
Flue thermostat
15
Flame detector electrode
16
Burner
17
Burner injectors
18
D.H.W. plate heat exchanger (automatic by-pass)
19
Pump and air separator
20
System filling cock
21
Boiler drain point
22
Manometer
23
Pressure relief valve
240 i
Figure 21
heating
domestic
gas
domestic
heating
inlet
water outlet
water inlet
return
0901_0805 / CG_1738