2.3 Internal parts of the water heater
LEGEND
1.
PRIMARY CONDENSING HEAT EXCHANGER
2.
PREMIX BURNER UNIT (GAS MANIFOLD + BURNER)
3.
CONDENSATE DRAIN PIPE
4.
IONISATION ELECTRODE
5.
IGNITION ELECTRODE
6.
FAN
7.
VENTURI
8.
IGNITION TRANSFORMER
9.
ELECTRONIC GAS VALVE
"
10. SAFETY VALVE 3/4
11. AUTOMATIC AIR VENT VALVE
12. HEATING SAFETY THERMOSTAT
13. HEATING SENSOR
14. PUMP WITH AIR VENT
15. WATER PRESSURE SWITCH
16. FLUE HOOD
17. SAFETY THERMOFUSE
18. EXPANSION VESSEL
19. D.H.W. SENSOR
20. CONDENSATE TRAP
21. WATER PRESSURE GAUGE
22. AUTOMATIC BY-PASS
23. AIR PRESSURE SWITCH
24. SYSTEM DRAIN VALVE
25. ROOM SEAL CHAMBER BACK SIDE
26. DIVERTER VALVE ACTUATOR UL/CSA
27. ELECTRONIC FLOWSWITCH
28. DHW EXCHANGER
29. FILLING TAP
30. NO-RETURN VALVE
TECHNICAL CHARACTERISTCS
17
16
1
4
2
12
13
3
6
19
11
14
10
22
24
20
12
23
18
8
5
7
9
15
25
28
27
26
30
21
29
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