Manuals / A.O. Smith / Household Appliance / Water Heater

A.O. Smith BFC - 30, BFC - 60 Parallel connections, Practical example of parallel flue gas outlet

Models: BFC - 30 BFC - 60

1 98

Download 98 pages 30.7 Kb

Page 31

is

3.9.4Parallel connections

The table states the maximum pipe lengths for parallel systems. The maximum pipe length depends on the chosen diameter.

Warning

Install flue component pipe runs with a run-off of 5 mm per metre.

Flue gas outlet requirements for parallel systems

Appliance	Diameter1	Maximum	Lequivalent	Lequivalent
		total length	90º bend	45º bend
BFC 28	80mm	25m	3.9m	1.1m

BFC 30	100mm	80m	4.6m	1.2m

BFC 50	100mm	45m	4.6m	1.2m

BFC 60	100mm	25m	4.6m	1.2m

BFC 28	100mm	100m	4.6m	1.2m

BFC 30	130mm	100m	2.4m	1.4m

BFC 50	130mm	100m	2.4m	1.4m

BFC 60	130mm	100m	2.4m	1.4m

1) Parallel systems with diameter of 130mm or 150mm. If the maximum total
length for a diameter of 130mm is insufficient, 150mm diameter must be used.
Any diameter enlargement must be carried out on both air supply and flue gas
outlet.

You must use the longest pipe when calculating the pipe length. For example, if the chimney pipe is 35 metres and the air supply pipe is 32 metres, use 35 metres as the length for the calculation. Next, add the Lequivalent for every 90° and 45° bend to this 35 metres, in both the air supply and flue gas outlet. The following practical example illustrates how to use the table.

Practical example of parallel flue gas outlet

Example

The diagram shows a BFC 30. This has to be fitted with a 25m parallel pipe 100mm in diameter, plus eight 90-degree bends. The configuration must be checked for compliance with the requirements stated in the table.

Instruction manual BFC

31

Image 31

A.O. Smith BFC - 30, BFC - 60 service manual Parallel connections, Practical example of parallel flue gas outlet

Contents

Installation User Your installer More information Read this manual carefullyTrademarks LiabilityGis Table of contents Performing maintenance Service programTroubleshooting Maintenance frequencyAppendices Table of contents About the appliance IntroductionWhat to do if you smell gas Regulations Symbol Target group Target groups MaintenanceIntroduction Gis Document Overview of thisChapter Target groups Description Appliances heating cycle Safety of the installationWorking principle of the appliance General working principle of the applianceWorking principle of the appliance Water temperature protection TheGas valvePressure switch Flame probe Appliances heating cycle Protection for the appliance4 Fan Water temperature protectionPressure switch Gas valveFlame probe Safety of the instal- lationUnvented installation Vented installationConditions InstallationPackaging EnvironmentalWorking clearances Air humidity and ambient temperatureAppliance maximum floor load Water compositionWorking clearances Technical specifica- tions Dimensions of the applianceUnit BFC General and electrical specificationsDimen Description SionGeneral 3+ Gas dataDescription II2H3+ Unit Gas category 2H G20 20 mbarInstallation diagram Circulation pipe Water connections, UnventedCold water side Hot water sideRegulations 1.3 Regulations Water connections, VentedAir supply and flue Introduction Gas connectionRequirements for flue gas discharge materials C43 B23 C33 C13 C53 Appliance Diameter Maximum length Number of 90º Bends Concentric connectionsPractical example of concentric flue gas discharge Type of appliance DescriptionAppliance with concentric flue gas discharge material SpecificationsSpecification Description Concentric wall flue terminal specifications C13Practical example of parallel flue gas outlet Parallel connectionsElectrical connection Preparation Connecting the mains voltagePreparation Isolating transformer Connecting the mains voltage10.2 Preparation Connecting an extra error signal Alarm OUT Connecting continuous pumpConnecting a program-controlled pump Connecting an extra on mode switch Tank on11.1 Checking the supply pressure and burner pressureProcedure to check pressures Finish off 3.11.4 Finalising Adjusting the pressureFinalising Gas dataConversion to a different gas category Orifice assemblyConversion of gas control Conversion to a different gas categoryPage Conversion to a different gas category Filling Installation diagramFilling Filling unvented installationsFilling vented installations Filling the applianceDraining Draining Min Gis Meaning of icons Electronic controller ON/OFF switchControl panel ControlsControl panel PC connectionStatus of the appliance Operating modes Error conditions Service conditionOperating modes Menu 11 Main menu chapter Error conditionsManual 13 Troubleshooting Status of the applianceManual 14 Maintenance frequency Service conditionGis Starting and running Appliances heating cycle Open 3.5 Installation diagram the manual gas valveStarting and running Appliances heating cycleStarting and running Shutting the appliance down for a long period Shut the appliance down for a brief period OFF modeShutting down Electrically isolating the applianceShutting down Main menu Switching on the on modeNotational convention for menu-related instructions Changing the appliances standard week program Setting water temperature during on modeWeek program Starting and stopping the week programWeek program setting the switch- off time Week program setting the switch- on timeWeek program setting the water temperature Adding times to a week program Week program setting the program- controlled pumpExtra period Deleting times from a week programSetting the program-controlled pump Setting the switch-on timeSetting the switch-off time Setting the water temperatureAdjustable settings SettingsSetting menu language Setting day and timeDisplaying appliance specifications Setting the hysteresis Service programDisplaying the error history Setting the display backlight time Switching the pump on or offSetting the service interval Setting the display contrastGeneral errors TroubleshootingDisplayed errors Start the appliance up 9 Starting and running Troubleshooting table for general errorsSymptom Cause Solution Remark Gas smell Display is offInsufficient or absent Symptom Cause Solution Remark Water leakageExplosive ignition Hot water supplyTroubleshooting table for displayed errors Displayed errors S15 blocking error Code + Description Cause Solution Remark S12 blocking errorS13 blocking error S14 blocking errorCode + Description Cause Solution Remark F02 lock out error Check the values 2.4.5 Pressure switch Code + Description Cause Solution RemarkFlue Code + Description Cause Solution Remark F03 lock out errorMaintenance 15.2 Preparation for maintenance. If there is ApplianceF05 lock out error Code + Description Cause Solution Remark F04 lock out errorF09 lock out error Code + Description Cause Solution Remark F06 lock out errorF07 lock out error F08 lock out errorF11 blocking error Code + Description Cause Solution Remark F10 lock out errorSelected appliance Code + Description Cause Solution Remark C02 lock out errorC03 blocking error C04 blocking errorE03 lock-out error Code + Description Cause Solution Remark E01 blocking errorE04 lock-out error Page Interval Maintenance frequencyMaintenance frequency Introduction Preparation for maintenance Performing maintenancePerforming maintenance Water-side mainte- nance Introduction Descaling and cleaning the tankChecking the anodes Cleaning the heat exchanger Finalizing mainte- nance Cleaning condensation water dischargeClean the burners Clean the orificesConditions for Instal- lation and use Warranty certificate16.1 General warranty 16.2 Tank warrantyWarranty certificate Appendices Electrical diagramAppendices Electrical diagramTerminal Block Connections Appendices Example Period Week program cardPeriod Tset PumpPage Index Index 0306