
16
Function diagram of boilers 24 / 28 KKV
Fig. 6
21
17
18
20
16
19
3
kPa
M
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
22
23
24
25
26
27
28
29
30
31
1.combustion gas extraction
11. HoW fl ow sensor
22. bypass
2. air bleeding valve
12. draining valve
23. HoW NTC sensor
3. expansion vessel
13. backfl ow valve
24. HeW pressure sensor
4. exchanger
14. top-up valve
25. trap
5. pump air bleeding valve
15. fi lter
26. HoW exchanger fi lter
6. pump
16. HeW inlet
27. gas valve
7. safety valve
17. HoW inlet
28. fan
8. NTC sensor of return HeWj
18. gas inlet
29. burner
9. 3-way valve
19. HoW outle
30. HeW temperature NTC sensor
10. HoW exchanger
20. HeW outlet
31. air supply
21. condensate drainage