A.O. Smith BFC - 30, BFC - 60 service manual Starting and running, Appliances heating cycle

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gis

9 Starting and running

9.1Introduction

Topics covered in this chapter, in sequence:

•Starting and running.

•The appliance's heating cycle.

9.2Starting and running

Start the appliance as follows:

1. Fill the appliance (5 "Filling").

2.Open (3.5 "Installation diagram") the manual gas valve.

3.Switch on the power to the appliance using the isolator between the appliance and the power supply.

4.Switch the electronic controller ON by setting the ON/OFF switch to position I.

a

»START OPERATION ^ CHANGE SETPOINT

ÈTset=65ÉC

6.Confirm the START OPERATION by pressing .

The appliance is now in "ON mode". If there is a heat demand, the appliance will run through the heating cycle (9.3 "The appliance's heating cycle").

If the heating cycle is not run, there is no heat demand; if this is the case, Tset will probably need to be set (11.4 "Setting the water temperature").

n

 

min

 

 

0063

O

I

 

IMD-0423 R0

The display will now show INTERNAL CHECK for about 10 seconds and go to the main menu.

a

INTERNAL CHECK

a

MENU »OFF ^ ON

ÈWEEK PROGRAM

5.Press the blue arrow once () to position the

cursor in front of ON and press . The display shown in the figure will appear.

9.3The appliance's heating cycle

The appliance's heating cycle is activated as soon as the measured water temperature (Tnet) falls below the threshold value (Tset). This threshold value depends on the currently selected appliance operating mode. For example, if the appliance is in "OFF mode" (frost protection), then this value is 5°C. If the appliance is in "ON mode", then this threshold value is selectable, for example, 65°C.

The heating cycle runs in turn through the following states:

1.HEAT DEMAND;

2.PRE-PURGE;

3.PRESSURE SWITCH;

4.PRE-GLOW;

5.IGNITION;

6.RUNNING;

7.POST-PURGE.

The complete cycle is explained in the following example, which assumes the appliance is in the basic mode ON.

Note

The same heating cycle applies to the other operating modes.

Instruction manual BFC

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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 sideWater connections, Vented Air 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

BFC - 30, BFC - 60 specifications

A.O. Smith is a well-regarded name in the water heating industry, known for producing innovative and efficient water heaters. Among their renowned products are the BFC - 60 and BFC - 30 models, which have gained popularity for their performance and reliability.

The A.O. Smith BFC - 60 and BFC - 30 are both designed to meet the diverse needs of residential and commercial users. The BFC - 60 has a capacity of 60 gallons, making it ideal for larger households or commercial settings where hot water demand is high. Meanwhile, the BFC - 30, with its 30-gallon capacity, caters to smaller households or establishments with lower hot water requirements.

One of the standout features of both models is their advanced heating technology. They are equipped with a high-efficiency burner system, which enhances the heating process while minimizing energy consumption. This means that users experience quicker recovery times and can enjoy a steady supply of hot water without the long wait associated with traditional heaters. The BFC series is designed to save energy, aligning with modern demands for sustainability.

Another significant characteristic of these models is their durable construction. Made with high-quality materials, including glass-lined tanks, they are built to resist corrosion and extend the lifespan of the water heater. This durability contributes to fewer maintenance requirements, giving users peace of mind.

In terms of safety, A.O. Smith has incorporated numerous features into the BFC series. Both models come with safety valves and thermostat controls to ensure that water is heated to appropriate temperatures, reducing the risk of scalding and malfunction. Additionally, their design allows for easy installation and maintenance, making them a user-friendly option.

Another aspect that distinguishes the BFC series is its compact design. Both models have a space-saving profile, making them suitable for installation in various locations, including tight utility rooms or basements. This flexibility allows homeowners and businesses to maximize their space without sacrificing performance.

Overall, the A.O. Smith BFC - 60 and BFC - 30 are exemplary water heating solutions that combine efficiency, durability, and safety. With their advanced features and technologies, they are an excellent choice for anyone in need of reliable hot water, ensuring comfort and satisfaction for years to come.
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