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Technical features and dimensions
2.3 Boiler layouts
Fig. 4 Boiler layout CTN
1. Automatic by-pass
2. DHW temperature probe
3. Motorised 3-way valve
4. Modulating gas valve
5. Burner
6. CH temperature double probe
7. Ignition/detection electrode
8. Mono-thermal heat exchanger
9. Flue gas thermostat
10. Expansion tank
11. 3-bar safety valve
12. Air-purging device
13. Minimum pressure switch
14. Circulation pump
15. 10 l/min ow-limiting device
16. Filler cock
17. Cold water ow switch with lter
18. Secondary plate exchanger
M CH system ow
AC DHW outlet
G Gas inlet
AF Cold water inlet
R CH system return
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