Description of functioning
t e c h n i c a l
5
3.- Description of functioning
3.1.- General description
3.1.1.- H
y
draulic Circuit
H
y
draulic Circuit
FEB-24ED
8
9
7
1
3
6
5
2
4
10
26
11
12
13
15
14
16
20
21
18
25
19 17
22
24
23
26
1. Expansion vessel
2. Pump
3. Low pressure
switch
4. Central heating thermistor
5. Th
r
ee way valve
6. High limit stat
7. Air pressure switch
8. Venturi
9. Fan
10. Sealed air box
11. Copper heat exchanger
12. Combustion chamber
13. Ignition electrodes
14. Main burner
15.
Ionisation
electrode
16. Modulating gas valve
17. Gas inlet
18. D.H.W Thermistor
19. Hot water outlet
20. Plate heat exchanger
21. C.H. Flow
22. Cold water inlet
23. C.H. Return
24.
Safety
valve
25. By-pass
2
6. C.H.Drain valve
4