A.O. Smith BFM - 100 Gas data, Description Unit, Natural gas G20 20 mbar, G31 37mbar propane

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3

3.4.3

Installation

Gas data

Gas data

is

Description	Unit		BFM	BFM	BFM	BFM	BFM
			30	50	80	100	120

Gas category: 30 through 100 II2H3+, 120: II2H3P
Natural gas G20 - 20 mbar
Orifice diameter	mm		2.60	2.50	2.70	3.20	3.30

Diameter of pilot flame orifice	mm		0.56/0.41	0.56/0.41	0.56/0.41	0.56/0.41	0.56/0.41

(1) = Blank plate	1 or 2		2	2	2	2	2
(2) = Burner pressure regulator

Nominal load (upper value)	kW		32.2	52.2	83.3	113.3	127.7

Nominal output	kW		26.4	42.3	67.5	90.8	102.4

Supply pressure	mbar		20	20	20	20	20

Burner pressure (†)	mbar		12.5	12.9	12.9	12.5	14.0
Gas consumption (*)	m3/h		3.1	5.0	7.9	10.8	12.2
LP gas data
G30 - 30 mbar (butane)

Orifice diameter	mm		1.45	1.40	1.50	1.95	n.a.

Diameter of pilot flame orifice	mm		0.25	0.25	0.25	0.25

(1) = Blank plate	1 or 2		1	1	1	1
(2) = Burner pressure regulator

Nominal load (upper value)	kW		31.4	49.9	81.3	110.5

Nominal output	kW		26.4	41.4	67.5	90.8

Supply pressure	mbar		30	30	30	30

Burner pressure (†)	mbar		-	-	-	-
Gas consumption (*)	kg/h		2.3	3.6	5.9	8.0
G31 - 37mbar (propane)

Orifice diameter	mm		1.45	1.40	1.50	1.95	2.30

Diameter of pilot flame orifice	mm		0.25	0.25	0.25	0.25	0.25

(1) = Blank plate	1 or 2		1	1	1	1	2
(2) = Burner pressure regulator

Nominal load (upper value)	kW		30.4	47.8	77.2	110.9	125.0

Nominal output	kW		25.5	39.6	63.9	90.8	102.4

Supply pressure	mbar		37	37	37	37	37

Burner pressure (†)	-		-	-	-	--	22.0
Gas consumption (*)	kg/h		2.2	3.4	5.5	7.9	8.9

(*) Based on 1013.25 mbar and 15 °C.

(†) If using a blank plate instead of a burner pressure regulator, it is assumed that the burner pressure is equal to the supply pressure. In practice, however, the burner pressure will be lower.

22	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 diagramAbout the appliance IntroductionWhat to do if you smell gas Regulations Symbol Target group Maintenance Forms of notation Target groupsIntroduction Document Overview of thisChapter Target groups Description Gis General working Working principle of the appliancePrinciple Appliance 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 panelStatus of the appliance Error conditionsOperating modes Status of the appliance Starting the appliance Starting and runningAppliances heating cycle 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