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2.0 Introduction
5
© Baxi Heating UK Ltd 2007
2.1 Introduction
1. Your Baxi Combi 105 HE is a gas fired, room sealed,
powered flue condensing combination boiler,
providing central heating for your home and mains fed
domestic hot water to taps and shower. It is fully
automatic and does not have a pilot light. Boiler frost
protection and pump protection are integral features
of the appliance.
2. Priority is given to the hot water mode - when a
hot water tap is turned on the supply of heat to the
central heating circuit is interrupted.
3. Due to the high efficiency and resultant low flue gas
temperature when in condensing mode a white plume
of condensate will be emitted from the terminal. This
will be particularly evident during periods of low
outside temperature.
2.2 Facia Panel
1. The facia panel is behind the hinged lower door
panel. As well as the on/off/reset selector switch,
temperature control knobs and pressure gauge, the
facia incorporates ten neon indicator lights.
2. Neons 12 to 15 indicate the operational status of
the boiler. Neons 6 to 11 have a dual function,
indicating the temperature of the central heating water
when constantly illuminated. If a fault develops the
appropriate neon will begin to flash. Refer to Sections
3.3 to 3.7.
30
o
40
o
50
o
60
o
70
o
80
o
Reset
Fig. 3
30
o
40
o
50
o
60
o
70
o
80
o
1. On/Off/Reset Selector Switch
2. Central Heating Temperature Control
3. Hot Water Temperature Control
4. Central Heating System Pressure Gauge
5. Optional Integral Timer Position
Neon Indicators
6. Flame Failure or Blocked Condensate Drain
7. Safety Thermostat Activated (Boiler or Flue)
8. Fault on Fan or Flue
9. Fault on Pump or Low System Pressure
10. Fault on Hot Water Sensor
11. Fault on Central Heating Sensor
12. Power On
13. Domestic Hot Water Mode
14. Central Heating Mode
15. Burner On
When neons 6 to 11 are constantly illuminated, they
indicate the temperature of the central heating water
32145
6 7 8 9 10 11
12 13 14 15
KEY TO FACIA PANEL (Fig. 3)
Hinged Lower
Door Panel
Facia Panel