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User's Information Manual

Bosch 80% AFUE Gas Furnace

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Bosch Thermotechnology Corp.

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06.2018

Data subject to change

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Summary of Contents for BGS80

Page 1: ...Bosch 80 AFUE Gas Furnace BGS80 Model 4 Way Multipoise Category I Fan Assisted Furnace User s Information Manual 3124627 ...

Page 2: ...2 Bosch 80 AFUE Gas Furnace User s Information Manual 06 2018 Bosch Thermotechnology Corp Data subject to change ...

Page 3: ...nge Table of Contents 1 Key to Symbols and Safety Instructions 4 1 1 Key to Symbols 4 1 2 Safety 4 2 Introduction 6 3 Furnace Components 6 4 Operating Your Furnace 7 4 1 Furnace Start Up 7 4 2 Furnace Shutdown 7 5 Routine Maintenance 8 5 1 Annual Inspection 8 5 2 Filters 8 5 3 Burners 9 5 4 Replacement Parts 9 ...

Page 4: ...rs and replace fuses as required by basic maintenance All other operations including installation repair and service must be performed by a qualified installer service agency or the gas supplier WARNING FIRE OR EXPLOSION HAZARD Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance WHAT TO DO IF YOU SMELL GAS Do not try to light any applia...

Page 5: ...od flooring Special base is not required when this furnace is installed on industry standard Coil Assembly matching correct furnace width WARNING CARBON MONOXIDE POISONING HAZARD Failure to follow instructions could result in severe personal injury or death due to carbon monoxide poisoning if combustion products infiltrate into the building Check that all openings in the outside wall around the ve...

Page 6: ...es as well as some basic maintenance and up keep to ensure your furnace is always running at its optimal performance 3 Furnace Components The furnace below is shown in the upﬂow orientation your furnace may have been installed in a diﬀerent orientation Figure 1 6 8 9 10 11 1 2 3 4 5 7 Component Identification 1 Heat Exchanger 2 Pressure Switch 3 Inducer Blower and Motor 4 Flame Sensor 5 Gas Valve ...

Page 7: ...om thermostat to slightly above room temperature This signals the furnace to start the inducer motor starts and the hot surface igniter energizes 13 After 17 21 seconds the gas valve energizes letting gas ﬂow to the burners where it is then ignited If ﬂame is not detected the furnace control goes into the retry sequence The retry sequence provides a 60 second wait following an unsuccessful ignitio...

Page 8: ...cracks The trap must be ﬁlled with water and the drain and trap should be cleaned 2 The Blower The bearings in the induced draft blower and circulator blower motors are permanently lubricated by the manufacturer No further lubrication is required Check motor windings for accumulation of dust which may cause overheating Clean as necessary 3 The Flame Sensor Under some conditions the fuel or air sup...

Page 9: ...ize Filter type Side return Bottom return 14 1 2 16X25 14X25 High Velocity 600 FPM 17 1 2 16X25 16X25 High Velocity 600 FPM 21 16X25 20X25 High Velocity 600 FPM 24 5 16X25 24X25 High Velocity 600 FPM Table 1 Manufacturer recommended high velocity filter sizes Inch 5 3 Burners Periodically during the heating season perform a visual check of the burner ﬂames Turn the furnace on at the thermostat Wai...

Page 10: ...10 Bosch 80 AFUE Gas Furnace User s Information Manual 06 2018 Bosch Thermotechnology Corp Data subject to change ...

Page 11: ...User s Information Manual Bosch 80 AFUE Gas Furnace 11 Bosch Thermotechnology Corp 06 2018 Data subject to change ...

Page 12: ...United States Bosch Thermotechnology Corp 65 Grove Street Watertown MA 02472 Tel 866 642 3198 Fax 954 776 5529 www boschheatingandcooling com BTC 770304101 A 06 2018 ...

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