A.O. Smith BFC - 80, BFC -100 service manual Working principle of the appliance

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2Working 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.

2.2General working principle 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 T1

8.combustion chamber

9.anode

10.tank

11.heat exchanger

12.inspection and cleaning opening

13.temperature sensor T2

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

25.mains power choke

26.EMC filter

27.frequency controller

28.potentiostat

29.pallet

The figure shows a cut-away view of the appliance.

Cut-away view of the appliance

1	19
25
2	5
4
26
27
7
6
28
3
	16
	9
	8
18	10
20	11
17	22
21

12

13

14

15

23

24

29

IMD-0219 R2

Instruction manual BFC 13