Baxi Combi Instant 80 HE - Installation & Servicing Instructions Manual

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Baxi Combi Instant 80 HE

Baxi Combi Instant 105 HE

Gas Fired Wall Mounted

Condensing Combination Boiler

Installation & Servicing Instructions

Please leave these instructions with the user

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Table of Contents

Natural Gas2
Table of Contents3
Legislation4
- Description5
- Instant Domestic Hot Water (Expansion Vessel & Pre-Heat Store)5
- Optional Extras5
- Product View5
Introduction5
General Layout6
- Central Heating Mode7
- Domestic Hot Water - Preheat Mode7
Appliance Operation7
- Pump Protection8
- Domestic Hot Water Mode8
- Frost Protection Mode8
Technical Data9
Dimensions and Fixings11
- Central Heating Circuit12
- System Control12
System Details12
- System Filling and Pressurising13
- Expansion Vessel (Central Heating Only)13
- Pressure Relief Valve13
- Hard Water Areas14
- Showers14
- Domestic Hot Water Circuit14
- Location15
- Clearances15
Site Requirements15
- Ventilation of Compartments16
- Gas Supply16
- Electrical Supply16
- Condensate Drain17
- Flue18
- Terminal Position with Minimum Distance18
- Terminal Guard19
- Flue Trim19
- Flue Dimensions19
- Flue Options20
- Flushing21
- Preparing the Boiler21
Installation21
- Fitting the Boiler22
- Fitting the Pressure Relief Discharge Pipe22
- Fitting the Flue23
- Making the Electrical Connections25
- Preliminary Electrical Checks25
Commissioning the Boiler26
Checking the Burner Pressure27
Completion28
Annual Servicing29
Servicing the Boiler29
- Fan31
- Pressure Switch31
Changing Components31
- Heat Exchanger32
- Burner32
- Injectors33
- Electrodes33
- Insulation33
- DHW Temperature Sensor34
- Safety Thermostat34
- Central Heating Temperature Sensor34
- Gas Valve34
- Pump - Head Only35
- Pump - Complete35
- Automatic Air Vent35
- Pressure Gauge36
- Expansion Vessel & Pre-Heat Store36
- Condensate Trap36
- P.C.b.37
- Selector Switch37
- Plate Heat Exchanger38
- Diverter Valve Assembly38
- Flow Regulator39
- Secondary Heat Exchanger40
- Flue Overheat Thermostat40
Illustrated Wiring Diagram41
Fault Finding42
Fault Finding Solutions46
Short Parts List49
- Gas Fired Wall Mounted Condensing Combination Boiler53
- Warnings56
- In an Emergency56
- In Case of Gas Leaks56
- Electricity Supply56
- Facia Panel57
- Instant Domestic Hot Water57
- Operating the Boiler58
- Temperature Control59
- Flame Failure Reset59
- Safety Thermostats60
- Air Flow Monitor60
- Pump Fault or Low Pressure60
- Sensor Fault / Pump Protection60
- Central Heating System Pressure61
- To Shut off the Boiler61
- Clearances and Check List62
- Cleaning the Outercase63

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