20
1*.Combustion gases thermostat
8. Pump
17. Reverse valve
1. Air manostat
9. Hot water fl ow detector
18. Safety valve
2*.Thrust breaker
10. Pressure sensor
19. Top-up valve
2. Fan
11. Draining valve
20. Bypass
3. Combustion gas collector
12. Heating water inlet
21. 3-way valve
4. Heating water heat exchanger
13. Hot(cold) water inlet
22. Hot water heat exchanger
5. Burner
14. Gas inlet
23. Heating water temp. sensor
6. Gas valve
15. Hot water outlet
24. Emergency thermostat
7. Expansion vessel
16. Heating water outlet
Boiler operation scheme
Fig. 9
24
17
18
19
20
21
22
23
16
14
15
6
7
8
9
10
11
12
5
4
3
2
1
13
2*
1*
24 KTV/ 28 KTV
24 KOV
