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installation
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1. Manual air vent
2. Burner
3. Detection electrode
4. C.H. ow temperature probe
5. C.H. return temperature probe
6. Secondary heat exchanger
7. C.H. pressure relief valve
8. By-pass
9. Drain valve
10. Condensate trap
11. C.H. circuit lter
12. D.H.W. Flow switch
13. Diverter valve
14. Low water pres switch
15. Circulation pump
16. Expansion vessel
17. Modulating fan
18. Ignition electrodes
19. Thermal fuse
Water circuit diagram
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E-COMBI
E-SYSTEM