A.O. Smith 120 through 250 Series - Manual (Page 13)

Instruction manual BFC 13
gis
2 Working principle of
the appliance
2.1 Introduction Topics covered in this chapter:
•
General working principle of the appliance ;
• The appliance's heating cycle ;
• Protection for the appliance ;
• Safety of the installation .
2.2 General working
principle of the
appliance The figure shows a cut-away view of the appliance.
Cut-away view of the appliance
Legend
Only applicable numbers are
mentioned.
1. cover
2. hot water outlet
3. electrical connector block
4. electronic controller
5. pressure switch
6. control panel
7. temperature sensor T
1
8. combustion chamber
9. anode
10. tank
11. heat exchanger
12. inspection and cleaning opening
13. temperature sensor T
2
14. cold water inlet
15. drain valve
16. gas control
17. burner
18. fan
19. air supply hose
20. hot surface igniter
21. flame probe
22. chimney pipe
23. siphon
24. insulation layer
12
13
14
15
11
10
9
8
7
6
5
4
3
2
1
16
17
18
19
20
21
22
23
24
IMD-0070 R1