Fig. 9
Central Heating
Temperature Control
Fig. 10
Domestic Hot Water
Temperature Control
Flame Failure |
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| Safety Thermostat | ||||||||
Neon |
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30o 40o | 50o 60o 70o 80o | ||||||||||
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Fig. 11
Reset
Reset Position
Fig. 12
© Baxi Heating UK Ltd 2007
3.0Operating the Boiler
3.2Temperature Control
1.Central Heating: The central heating hot water flow temperature can be adjusted between 30° C (± 5° C) minimum and 85° C (± 5° C) maximum.
2.Turn the control knob clockwise to increase the temperature (Fig. 9).
3.In normal winter usage we recommend that the central heating temperature be set at maximum.
4.Domestic Hot Water: The temperature of the domestic hot water can be adjusted by turning the control knob clockwise to increase up to a maximum of 65° C (Fig. 10).
5.The temperature of the water is also dependent on the water flow rate and the temperature of the mains coming into the house.
6.By slightly reducing the flow from the tap the temperature will increase up to the maximum if required.
7.The flow rate can be reduced down to as low as 2.5 litre/min. The boiler will still recognise the need to heat the water.
3.3Flame Failure Reset
1.The red flame failure neon ( ) will illuminate in the event of the burner failing to light, when incomplete
lighting of the burner occurs or blockage of the condensate drain (Fig. 11).
2.Turn the selector switch fully
3.If the flame failure light illuminates repeatedly a fault is indicated with either the boiler, the gas supply or the condensate drain. Your installer or Service Engineer should be contacted as soon as possible.
3.4Safety Thermostats
1. Your Baxi Combi 105 HE is fitted with additional safety devices, which shut down the boiler in the event of the system, the boiler or the flue overheating. The
safety thermostat neon ( | ) will light in this instance |
(Fig. 11). |
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2. To reset: Turn the selector fully
3. If after turning the selector to the ‘Reset’ position the boiler does not relight or the safety thermostat operates repeatedly, causing boiler shutdown, a fault is indicated. Your Installer or Service Engineer should be contacted
as soon as possible.
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