A.O. Smith BFM - 100, BFM - 120 manual BFM 30, 50, 80, Bfm

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Installation	is

11.Use the pressure gauge to read the burner pressure at nipple (8). Refer to the gas data table (3.4.3 "Gas data").

Note

If the burner pressure is incorrect and the appliance is fitted with a blank plate or high-low control, then you cannot adjust the pressure. In this case, consult your installation engineer or supplier. If the appliance is indeed fitted with a burner pressure regulator, then you can adjust the pressure.

12.BFM 30, 50, 80, 100

13.Remove the cap (2) from the burner pressure regulator.

14.Depending on the correction required, correct the burner pressure by turning adjustment screw (3):

-Adjustment screw anticlockwise: burner pressure decreases.

-Adjustment screw clockwise: burner pressure increases.

15.BFM 120

16.Remove the cap (2) from the burner pressure regulator.

17.Depending on the correction required, correct the burner pressure by turning adjustment screw (3) (PG) using the Allen key supplied with the appliance:

-Adjustment screw anticlockwise: burner pressure decreases.

-Adjustment screw clockwise: burner pressure increases.

Warning

Adjustment screw (Ps) adjusts the starting pressure. This need not, and must never be adjusted from the factory preset.

18.Check the burner pressure against the value given in the gas table (3.4.3 "Gas data").

19.If the pressure reading is not correct, repeat the burner pressure adjustment until the correct pressure is obtained.

20.Shut down the appliance by setting the 0/1 switch to position 0.

21.Shut off the gas supply.

22.Disconnect the two pressure gauges and re-tighten the sealing screws in the test nipples.

Note

Before starting-up the appliance, take time to fill in the warranty card

supplied with the appliance. This enables us to guarantee the quality of our systems and further enhance our warranty procedure.

Please return this card as soon as possible. Your customer will then receive a warranty certificate with our warranty conditions

38	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