A.O. Smith BFM - 100 Water connections, Vented, Cold water side, Recirculation pipe, Drain valve

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3

3.6Water connections, Vented

3.6.1

3.6.2

Installation	is

Warning

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

Cold water side

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

1.Fit an approved stop valve (4) on the cold water side between the cold water head tank (18) and the appliance, as required by

regulations (1.3 "Regulations").

Recirculation pipe

You can install a top to bottom circulation pump to prevent water stacking in the boiler.

1.Optional: depending on the draw-off pattern, fit a recirculation pipe (Ø 22 mm), a stop valve (11) and a top to bottom circulation pump (7).

2.Fit a non-return valve (5).

3.Fit a stop valve (11).

3.6.3Hot water side

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

Note

Insulating long hot water pipes prevents unnecessary energy loss.

1.Fit the T&P valve (3).

2.Optional: fit a temperature gauge (12) so you can check the temperature of the tap water.

3.Fit a stop valve (4) in the hot water outlet pipe, for use when servicing.

4.If a circulation pipe is required, continue further by installing the circulation pipe (3.6.5 "Circulation pipe").

3.6.4Drain valve

1.Fit the standard drain valve (9) supplied with the appliance.

2.If applicable, fit a circulation pipe (3.6.5 "Circulation pipe").

If not, fit the blind threaded plug and gasket (C) supplied with the drain valve, as shown in the figure.

C

IMD-0122 R1

24	Instruction manual BFM

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Contents Page Page Read this manual carefully TrademarksLiability More informationGis Table of contents Troubleshooting Performing maintenanceWarranty certificate Electrical diagramIntroduction 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 Water temperature protection Pressure switchFlame probe Protection DescriptionSafety of the instal- lation Unvented installationVented installation 3 T&P valveGis Installation Air humidity and ambient temperatureAir humidity and ambient temperature PackagingInstallation Maximum floor loadWater composition Working clearancesTechnical specifica- tions Dimensions of the appliance Plan and elevation of the applianceGeneral and electrical specifications Dimens DescriptionBFM100 BFM120 Ion UnitGas data Description UnitNatural gas G20 20 mbar LP gas data G30 30 mbar butaneInstallation diagram Installation diagramWater connections, Vented Cold water sideRecirculation pipe 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 ON/OFF switch Control panelExplanation of icons Control thermostatBurner control reset button Control panelError conditions Status of the applianceOperating modes Status of the appliance Starting and running Starting the applianceAppliances heating cycle Starting and running Shutting down the appliance for a brief period OFF mode Shutting downIsolating the appliance from the mains Shutting the appliance down for a long periodShutting down Troubleshooting Control thermostat 7.5 Control thermostatTroubleshooting general errors Symptom Cause Solution Remark Gas smellWater leakage 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 maintenanceDescaling and cleaning the tank Performing maintenanceWater-side mainte- nance 12.3.1 Checking the anodesIMD-0235 R2 Clean the burners Clean the orificesGas-side mainte- nance 12.4.1 Checking the flue baffles Finalising mainte- nanceWarranty certificate 13.1 General warranty13.2 Tank warranty Conditions for Instal- lation and useWarranty certificate Electrical diagram BFM Electrical Diagram Electrical diagramOptional Components Electrical diagram Index 0306 Index