Instruction manual

The Cylinder
The Chaffoteaux et Maury BRITONY DUO 55 is designed
for use as an unvented storage cylinder heated indirectly
by a BRITONY SYSTEM PLUS 60 boiler. The cylinder
is supplied with a safety controls pack and expansion
vessel to allow it to be connected to the main cold water
supply. The cylinder is stainless steel with a high power
coil. It is contained within a white case insulated with a
preformed polystyrene jacket.
Location of components
1. Air pressure switch
2. Steel chassis complete with expansion vessel
3. Main heat exchanger
4. Combustion chamber
5. Multi-gas burner assembly comprising ignition
and ionisation electrodes
6. Automatic air separator and automatic vent
7. Heating circuit flow switch
8. Pump
9. Electrical box
11. Overheat thermostat
12. Gas valve assembly
13. Sealed chamber
14. Flue hood with fan
16. Primary circuit control thermistor
17. Three way valve
18. CH Flow isolating valve
19. Two position selector switch
20. User’s instruction panel
21. Heating flow temperature adjustment
22. Green indicator - Power ON
23. Orange indicator - Burner ON
24. Red indicator - Lock out / flame failure
25. Reset button
26. Pressure gauge
27. Gas service tap
28. Hot water flow isolating valve
29. CH Return isolating valve
30. Pressure relief valve (boiler)
32. By pass
33. By pass adjustment screw
34. Location of central heating filter
35. Expansion relief valve also used for draining
cylinder
36. Pressure reducing valve
37. Discharge pipe to tundish
38. Cold water inlet
39. Return to boiler
40. Hot water outlet
41. Cylinder thermostat phial position
42. Flow to coil
.6
,7
8
27 29 30
6
m
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