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18
AST 14 C 257/00
KR
1. Condensate drain trap
15. Return temperature sensor
2. Modulating gas valve
16. 3-bar safety valve
3. Heating temperature sensor 1
17. Pressure transducer
4. Modulating fan
18. De-aerator
5. Primary condensing exchanger
19. Circulation pump
6. De-aerator
20. Discharge tap
7. Combustion air intake system
21. Automatic bypass
8. Flue gas vent system
9. Flue gas sampling points
10 Flue gas thermostat on vent duct
S
Condensate drain
11. Flue gas probe on exchanger
M
Heating system flow
12. Ignition/detection electrode
G
Gas intake
13. Expansion vessel
F
Cold water inlet
14. Fan control sensor
R
Heating system return