Schematic Diagram; Main Components - Baxi 224 Combi 2 Installation And Service Manual

4 Description of the product
Fig.6

Schematic diagram

2
4
5 6
4.3

MAIN COMPONENTS

Fig.7 Functional diagram
2 3
1
29
28
27
26
25
24
23
22
20
19
18
15 17 16
20 Combi 2
4.2.4
1
2
3
4
5
6
7
1
8
9
10
9
10
M
3
7 8
BO-0000144
4
10. Gas valve
5
11. Heating system and pump venting valve
12. Pump
6
13. Cable gland
14. Control panel with boiler PCB and display
7
15. Domestic hot water plate heat exchanger fastening screws
8
16. Domestic hot water priority sensor
17. Domestic hot water plate heat exchanger
9
18. Siphon
10
19. Hydraulic safety valve (3 bar)
20. Hydraulic pressure gauge
11
21. 3-way valve
22. Air-gas silencer assembly
12
23. Heating circuit water flow sensor (°C)
21
24. Safety thermostat (limit)
13
25. Condensate drain pipe connection towards discharge
26. Detection/ignition electrode
27. Burner flange
14
28. Flue gas temperature sensor
29. Boiler earthing socket
BO-7749665
Schematic diagram
Heat exchanger (heating)
Water unit
Plate heat exchanger (DHW)
Safety valve
Heating flow
DHW outlet (G1/2")
DHW inlet (G1/2")
Heating return
Pump (heating circuit)
Motorised three-way valve
1. Construction
2. Hooks for fastening the bracket to the wall
3. Flue gas tower
4. Expansion vessel air control/filling valve
5. Expansion vessel
6. Hydraulic circuit-expansion vessel connection pipe
7. Air-gas collector
8. Fan (air-gas assembly: Control board and mixer valve)
9. Heating return sensor