Working principle of the appliance | A.O. Smith BFM - 120 instruction

gis

2Working principle of the appliance

2.1	Introduction	Topics covered in this chapter:
		• General working principle of the appliance;
		• The appliance's heating cycle;
		• Protection for the appliance;
		• Safety of the installation.
2.2	General working	The figure shows a cut-away view of the appliance.
	principle of the
	appliance

Instruction manual BFM

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Image 11

A.O. Smith BFM - 120, BFM - 100 manual Working principle of the appliance, General working, Principle Appliance

Contents

Page Page More information Read this manual carefullyTrademarks Liability Gis Table of contents Electrical diagram TroubleshootingPerforming maintenance Warranty certificate What to do if you smell gas Regulations IntroductionAbout the appliance Introduction Maintenance Forms of notation Target groupsSymbol Target group Chapter Target groups Description Overview of thisDocument Gis Principle Appliance Working principle of the applianceGeneral working Working principle of the appliance Appliances heating cycle Protection for the appliance Protection Description Water temperature protectionPressure switch Flame probe 3 T&P valve Safety of the instal- lationUnvented installation Vented installation Gis Packaging InstallationAir humidity and ambient temperature Air humidity and ambient temperature Working clearances InstallationMaximum floor load Water composition Technical specifica- tions Plan and elevation of the appliance Dimensions of the appliance Unit General and electrical specificationsDimens Description BFM100 BFM120 Ion LP gas data G30 30 mbar butane Gas dataDescription Unit Natural gas G20 20 mbar Installation diagram Installation diagram Hot water side Water connections, VentedCold water side Recirculation pipe Circulation pipe Water connections, Unvented See C in the installation diagram 3.5 Installation diagram Gas connection Circulation pipe Air supply and flue Introduction Installing chimney flue components for BFM 30, 50 Subject Description Concentric wall flue terminal BFM Concentric roof flue terminal BFM 30, 50 Installing chimney flue components for BFM 100 C33 concentric roof flue terminal specifications BFM 30, 50 Concentric wall flue terminal BFM100 M2000 MDV SCC C13 concentric wall flue terminal specifications BFM 100 Concentric roof flue terminal BFM 100 Electrical connection 11 C33 concentric roof flue terminal specifications BFM 100 Mains power Fan Alarm Off Connecting the mains power Gas control for BFM 30 through Checking the supply pressure and burner pressure Gas control for BFM BFM BFM 30, 50, 80 Conversion Conversion to a different gas category Conversion to a different gas category Orifice replacementPage Conversion to a different gas category Filling Filling Draining Draining Draining unvented installations Draining vented installations Gis Control thermostat ON/OFF switchControl panel Explanation of icons Control panel Burner control reset button Operating modes Error conditionsStatus of the appliance Status of the appliance Appliances heating cycle Starting and runningStarting the appliance 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 mains Shutting down Control thermostat 7.5 Control thermostat Troubleshooting Explosive ignition Troubleshooting general errorsSymptom Cause Solution Remark Gas smell Water leakage Symptom Cause Solution Remark Insufficient hot water Troubleshooting insufficient hot water Troubleshooting No hot water Cycle Symptom Cause Solution RemarkPage Introduction Preparation for maintenance Performing maintenance Checking the anodes Descaling and cleaning the tankPerforming maintenance Water-side mainte- nance 12.3.1 IMD-0235 R2 Checking the flue baffles Finalising mainte- nance Clean the burnersClean the orifices Gas-side mainte- nance 12.4.1 Conditions for Instal- lation and use Warranty certificate13.1 General warranty 13.2 Tank warranty Warranty certificate Electrical diagram Electrical diagram BFM Electrical Diagram Optional Components Electrical diagram Index Index 0306