A.O. Smith BFM - 100, BFM - 120 manual Circulation pipe, Gas connection

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3

Installation

C

is

IMD-0122 R1

3.7.5Circulation pipe

See (C) in the installation diagram (3.5 "Installation diagram").

If an immediate flow of hot water is required at draw-off points, a circulation pump can be installed. This improves comfort and reduces water wastage.

1.Fit a circulation pump (6) of the correct capacity for the length and resistance of the circulation system.

2.Fit a non-return valve (5) behind the circulation pump to guarantee the direction of circulation.

3.Fit two stop valves for service purposes (4).

4.Connect the circulation pipe to the T-piece at the drain valve (9) as shown in the drain valve figure (3.6.4 "Drain valve").

3.8 Gas connection

Warning

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

Caution

Make sure that the diameter and length of the gas supply pipe are large enough to supply sufficient capacity to the appliance.

See (D) in the installation diagram (3.5 "Installation diagram").

1.Fit a manual gas valve (10) in the gas supply pipe.

2.Blow the gas pipe clean before use.

3.Close the manual gas valve.

4.Fit the gas supply pipe to the gas control.

Warning

After fitting, check for leaks.

26	Instruction manual BFM

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Contents Page Page Liability Read this manual carefullyTrademarks More informationGis Table of contents Warranty certificate TroubleshootingPerforming maintenance Electrical diagramWhat 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 Flame probe Water temperature protectionPressure switch Protection DescriptionVented installation Safety of the instal- lationUnvented installation 3 T&P valveGis Air humidity and ambient temperature InstallationAir humidity and ambient temperature PackagingWater composition InstallationMaximum floor load Working clearancesTechnical specifica- tions Dimensions of the appliance Plan and elevation of the applianceBFM100 BFM120 Ion General and electrical specificationsDimens Description UnitNatural gas G20 20 mbar Gas dataDescription Unit LP gas data G30 30 mbar butaneInstallation diagram Installation diagramRecirculation pipe Water connections, VentedCold water side Hot water sideSee C in the installation diagram 3.5 Installation diagram Circulation pipe Water connections, UnventedCirculation pipe Gas connectionInstalling chimney flue components for BFM 30, 50 Air supply and flue IntroductionConcentric wall flue terminal BFM Subject DescriptionConcentric roof flue terminal BFM 30, 50 C33 concentric roof flue terminal specifications BFM 30, 50 Installing chimney flue components for BFM 100Concentric wall flue terminal BFM100 C13 concentric wall flue terminal specifications BFM 100 M2000 MDV SCCConcentric roof flue terminal BFM 100 11 C33 concentric roof flue terminal specifications BFM 100 Electrical connectionConnecting the mains power Mains power Fan Alarm OffChecking the supply pressure and burner pressure Gas control for BFM 30 throughGas control for BFM BFM 30, 50, 80 BFMConversion to a different gas category ConversionOrifice replacement Conversion to a different gas categoryPage Conversion to a different gas category Filling Filling Draining Draining unvented installations DrainingDraining vented installations Gis Explanation of icons ON/OFF switchControl panel Control thermostatBurner control reset button Control panelOperating modes Error conditionsStatus of the appliance Status of the appliance Appliances heating cycle Starting and runningStarting the appliance Starting and running Isolating the appliance from the mains Shutting down the appliance for a brief period OFF modeShutting down Shutting the appliance down for a long periodShutting down Troubleshooting Control thermostat 7.5 Control thermostatWater leakage Troubleshooting general errorsSymptom Cause Solution Remark Gas smell Explosive ignitionTroubleshooting insufficient hot water Symptom Cause Solution Remark Insufficient hot waterTroubleshooting No hot water Symptom Cause Solution Remark CyclePage Performing maintenance Introduction Preparation for maintenanceWater-side mainte- nance 12.3.1 Descaling and cleaning the tankPerforming maintenance Checking the anodesIMD-0235 R2 Gas-side mainte- nance 12.4.1 Clean the burnersClean the orifices Checking the flue baffles Finalising mainte- nance13.2 Tank warranty Warranty certificate13.1 General warranty Conditions for Instal- lation and useWarranty certificate Electrical diagram BFM Electrical Diagram Electrical diagramOptional Components Electrical diagram Index 0306 Index