Table of Contents
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Key
1. Fixing point
2. Flue terminal
3. Flue/air intake hood
4. Sealing gasket
5. Room sealed compartment
6. Control panel
7. Gas inlet
8. Domestic hot water outlet
9. Cold water inlet
10. Central heating flow outlet
11. Central heating return inlet
12. D.H.W. draining point
14. Central heating safety valve
15. Air inlet to fan
16. Fan
19. Combustion - heat exchanging compartment
20. Burner assembly
21. Injector manifold
22. Burner
26. Combustion chamber insulation
27. Copper heat exchanger for C.H. + D.H.W.
28. Flue collector from heat exchanger
29. Internal flue exit
30. Flue/surplus air collector
31. Air pressure control damper
32. Central heating pump
33. C.H. waterway of the heat exchanger
34. C.H. flow temperature sensor
35. Air separator
36. Automatic air vent
37. Cold water inlet filter
39. Cold water flow limiter
41. D.H.W. waterway of the heat exchanger
42. D.H.W. temperature sensor
1001
43. Air pressure switch
46. Operator gas valve
47. Modulating regulator (Modureg) gas valve
48. Burner pressure test point
49. Overheat cut-off thermostat
50. Central heating limit thermostat
51. Central heating frost thermostat
53. Heat exchanger venting point
56. Expansion vessel
58. Fan air outlet pressure test point
59. Flue outlet pressure test point
61. C.H. selector switch
62. Time clock
63. C.H. boiler thermostat
68. Control box with P.C.B.
69. Inner flue duct
70. Outer air intake duct
71. Modulating balance tube
80. 230 V + 24 V roomstat terminal blocks
81. Ignition electrode
82. Flame sensing electrode
83. Automatic ignition control panel
84. 1. gas valve operator 230 V
85. 2. gas valve operator 230 V
86. Automatic control reset knob
87. Venturi test point
100. Fault diagnostic/temperature control panel
101. P.C.B. (printed circuit board)
114. LOW Water pressure switch
136. Flowmeter
145. C.H. pressure gauges
157. D.H.W. thermostat
158. Gas inlet pressure test point
7
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