TECHNICAL CHARACTERISTCS
TR05A140.B1107
11
3.4 Function diagram
LEGEND
1. PRIMARY CONDENSING HEAT EXCHANGER
2. PREMIX BURNER UNIT (GAS MANIFOLD &
BURNER)
3. HEAT EXCHANGER CONDENSATE DRAIN PIPE
4. IONISATION ELECTRODE
5. IGNITION ELECTRODE
6. FAN
7. VENTURI
8. IGNITION TRANSFORMER
9. ELECTRONIC GAS VALVE
10. 3 BAR PRESSURE RELIEF VALVE - HEATING
CIRCUIT
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. FLUE SAFETY THERMOFUSE
18. EXPANSION VESSEL
19. ROOM SEALED CHAMBER
20. CONDENSATE TRAP
21. WATER PRESSURE GAUGE
22. AUTOMATIC BYPASS
23. CONDENSATE DRAIN PIPE
24. SYSTEM DRAIN VALVE
Figure 4: Function diagram
5
16
2
3
17
18
19
23
G HFHR
SC
4
22
12
1
13
21
14
10
11
20
9
6
8
15
7
HR HEATING RETURN 22mm
HF HEATING FLOW 22mm
G
GAS 22mm
SC
CONDENSATE DRAIN 25mm
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