A.O. Smith BFM - 100, BFM - 120 manual Checking the supply pressure and burner pressure

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3

3.11Checking the supply pressure and burner pressure

Installation	is

Note

Before starting the appliance and/or checking the supply pressure and burner pressure, you must fill (5 "Filling") the appliance.

Caution

Before starting up for the first time or after conversion, you must always check the supply pressure and burner pressure.

Note

The easiest way to check the gas pressures is by using two pressure gauges. This procedure assumes that these two gauges are available.

If the appliance is to be run on a different gas category than the factory preset gas category (see type plate) then you must first convert (4 "Conversion to a different gas category") the appliance.

Gas control for BFM 30 through 100

Legend

1.burner pressure regulator

2.burner pressure regulator cap

3.burner pressure regulator adjustment screw

4.gas control connector

5.blank plate

6.supply pressure test nipple

7.gas control

8.manifold test nipple

1

3

2

6

7

8

4

5

IMD-0256 R1

36	Instruction manual BFM

Image 36

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