34
Technical features and dimensions
2.4 Boiler layouts
Fig. 5 Hydraulic diagram
1. Condensate trap
2. Modulating gas valve
3. Flow temperature twin probe
4. Combustion fan
5. Heat exchanger
6. Deaerator on exchanger
7. Air intake duct
8. Flue gas venting duct
9. Flue gas analysis ports
10. Flue gas thermostat
11. Flue gas temperature sensor on exchanger
12. DHW temperature probe
13. Ignition/detection electrode
14. DHW expansion vessel
15. Magnesium anode
16. CH expansion vessel
17. Return temperature probe
18. 7-bar safety valve (DHW)
19. 3-bar safety valve (CH)
20. Pressure transducer
21. Circulation pump
22. CH system drain cock
23. Water heater drain cock
24. CH system filler cock
25. Motorised 3-way valve
26. Automatic by-pass
S
Condensate drain
G
Gas inlet
M
CH system flow
R
CH system return
C
DHW outlet
F
Cold water inlet
Summary of Contents for ITACA KB 24
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