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16
AST 14 C 258/00
SECT. 3
HYDRAULIC DIAGRAMS AND COMPONENTS
3.1 HYDRAULIC DIAGRAMS
KC
1. Condensate trap
20. 3-bar safety valve
2. Modulating gas valve
21. Discharge tap
3. CH temperature probe 1
22. Minimum pressure switch
4. CH temperature probe 2
23. 13-14 l/min flow-limiting device
5. Modulating fan
24. Filler cock
6. Return temperature sensor
25. Cold water flow switch with filter
7. Primary condensing exchanger
26. Secondary plate exchanger
9. Deaerator
27. DHW probe
10. Combustion air intake system
28. Automatic by-pass
11. Flue gas vent system
29. Motorised 3-way valve
12. Flue gas analysis ports
13. Flue gas thermostat on vent duct
14. Flue gas thermostat on exchanger
S Condensate drain
15. Ignition/detection electrode
M Heating system flow
16. Expansion vessel
C DHW outflow
17. Fan control sensor
G Gas intake
18. Deaerator
F Cold water inlet
19. Circulation pump
R Central heating system return