A.O. Smith BFM - 120, BFM - 100 manual Air supply and flue Introduction

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3.9Air supply and flue

3.9.1Introduction

Warning

The installation should be carried out by an authorised installation engineer, in compliance with general and local regulations (1.3 "Regulations").

The BFM 30, 50 and 80 differ from the BFM 100 and 120 in how the air supply and chimney flue are connected.

3.9.2Installing chimney flue components for BFM 30, 50, 80

The BFM-appliances are approved for installation types C13 and C33. The instruction manual describes these types. For a more detailed explanation, please contact your supplier or the manufacturer.

Note

We prescribe the use of a concentric roof or wall flue terminal, exclusively of a type approved for the appliance.

You must fulfil the following requirements:

•The maximum permissible length of chimney pipe (A+B+C) is 7 metres.

•The maximum permissible number of 45° or 90° bends is 2.

•If you are using a horizontal pipe, you must mount it with a minimum run-off of 5 mm per running metre of pipe towards the appliance!

•Make sure that the chimney discharges into an area approved for this type of appliance.

Instruction manual BFM

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Contents Page Page More information Read this manual carefullyTrademarks LiabilityGis Table of contents Electrical diagram TroubleshootingPerforming maintenance Warranty certificateIntroduction About the applianceWhat to do if you smell gas Regulations Maintenance Forms of notation Target groups Symbol Target groupIntroduction Overview of this DocumentChapter Target groups Description Gis Working principle of the appliance General workingPrinciple Appliance Working principle of the appliance Appliances heating cycle Protection for the appliance Protection Description Water temperature protectionPressure switch Flame probe3 T&P valve Safety of the instal- lationUnvented installation Vented installationGis Packaging InstallationAir humidity and ambient temperature Air humidity and ambient temperatureWorking clearances InstallationMaximum floor load Water compositionTechnical specifica- tions Plan and elevation of the appliance Dimensions of the applianceUnit General and electrical specificationsDimens Description BFM100 BFM120 IonLP gas data G30 30 mbar butane Gas dataDescription Unit Natural gas G20 20 mbarInstallation diagram Installation diagramHot water side Water connections, VentedCold water side Recirculation pipeCirculation pipe Water connections, Unvented See C in the installation diagram 3.5 Installation diagramGas connection Circulation pipeAir supply and flue Introduction Installing chimney flue components for BFM 30, 50Subject Description Concentric wall flue terminal BFMConcentric roof flue terminal BFM 30, 50 Installing chimney flue components for BFM 100 C33 concentric roof flue terminal specifications BFM 30, 50Concentric wall flue terminal BFM100 M2000 MDV SCC C13 concentric wall flue terminal specifications BFM 100Concentric roof flue terminal BFM 100 Electrical connection 11 C33 concentric roof flue terminal specifications BFM 100Mains power Fan Alarm Off Connecting the mains powerGas control for BFM 30 through Checking the supply pressure and burner pressureGas control for BFM BFM BFM 30, 50, 80Conversion Conversion to a different gas categoryConversion to a different gas category Orifice replacementPage Conversion to a different gas category Filling Filling Draining Draining Draining unvented installationsDraining vented installations Gis Control thermostat ON/OFF switchControl panel Explanation of iconsControl panel Burner control reset buttonError conditions Status of the applianceOperating modes Status of the appliance Starting and running Starting the applianceAppliances heating cycle Starting and running Shutting the appliance down for a long period Shutting down the appliance for a brief period OFF modeShutting down Isolating the appliance from the mainsShutting down Control thermostat 7.5 Control thermostat TroubleshootingExplosive ignition Troubleshooting general errorsSymptom Cause Solution Remark Gas smell Water leakageSymptom Cause Solution Remark Insufficient hot water Troubleshooting insufficient hot waterTroubleshooting No hot water Cycle Symptom Cause Solution RemarkPage Introduction Preparation for maintenance Performing maintenanceChecking the anodes Descaling and cleaning the tankPerforming maintenance Water-side mainte- nance 12.3.1IMD-0235 R2 Checking the flue baffles Finalising mainte- nance Clean the burnersClean the orifices Gas-side mainte- nance 12.4.1Conditions for Instal- lation and use Warranty certificate13.1 General warranty 13.2 Tank warrantyWarranty certificate Electrical diagram Electrical diagram BFM Electrical DiagramOptional Components Electrical diagram Index Index 0306