5
2.10 BOILER SCHEMATIC
Fig. 2
Alpha 500E - Technical Data
1.
Gas Service Cock
2.
Heating On/Off Valve
3.
Gas Valve
4.
Pressure Gauge
5.
Pump and Air Separator
6.
Primary Return Temperature Sensor
7.
Differential Water Flow Switch
8.
Adjustable By-Pass
9.
Flow restrictor
10. 3-Port Diverter Valve
11. Primary Flow temperature Sensor
12. Overheat Thermostat
13. C.H. Pressure Relief Valve
14. Auto Air Vent
15. Main Burner
16. Main Heat Exchanger
17. Fan
18. Air pressure Switch
19. Unvented Kit
20. C.H. Expansion Vessel
21. Storage Cylinder
22. Temperature/Pressure Relief Valve
23. Hot Water Storage Temperature Sensor
24. Secondary Heat Exchanger
25. DHW Expansion Vessel
26. Check Valve
27. Pressure Reducing Valve with Filter
28. Tundish
29. Ignition Electrodes
30. Flame Sensing Electrodes
31. Positive Pressure Point
32. Negative Pressure point
33. Flue Adaptor
34. Flue Sample Point
35. Room Sealed Chamber
36. Expansion Relief Valve
