A.O. Smith BFC - 30, BFC - 60 Water temperature protection, Gas valve, 4 Fan, Pressure switch

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gis

2.4.2Water temperature protection

The electronic controller uses temperatures sensors T1 (7) and T2 (13) to monitor three temperatures that are important for safety. The table explains the functioning of the temperature sensors.

Temperature protection

Protection

Description

 

 

Against frost

The frost protection cuts in. The water is heated to 20°C.

(T1 < 5°C or T2 < 5°C)

 

 

 

For maximum water temperature

The high-limit safeguard serves to prevent overheating and/or excessive

(T1 > 85°C or T2 > 85°C)

formation of scale in the appliance. If the high-limit safeguard is activated, the

 

heating is stopped. This causes the water in the tank to cool down. Once the

 

water has cooled sufficiently (T1 < 78°C), the electronic controller resets the

 

appliance.

 

 

For extra safety

A lockout error of the water heater controller takes place. The controller must

(T1 > 93°C or T2 > 93°C)

be manually reset before the appliance can resume operation (8.3 "Error

 

conditions"). The reset may only be performed if T1 <78°C.

2.4.3Gas valve

The electronic controller opens the gas valve so that gas can be supplied to the burner. As a safety measure, the gas valve has a double shut-off. The double shut-off guarantees complete isolation of the appliance from the gas supply.

To help ensure smooth ignition, the gas valve opens gradually ('softlite").

2.4.4Fan

The fan (18) provides an optimum air supply when there is a heat demand. As a safety feature, the fan ensures that any gases present in the combustion chamber are removed, both before and after combustion. We refer to this as pre- and post-purge.

The fan speed is continuously monitored by the electronic controller (4). The electronic controller takes control if the speed of rotation varies too much from the set value.

2.4.5Pressure switch

The pressure switch ensures the discharge of flue gases and the supply of incoming air during the pre-purge and normal running of the appliance. The default state of the pressure switch is open. When sufficient pressure difference is reached, the pressure switch closes. However, in the event of a fault, the pressure switch is tripped open, and the heating cycle is interrupted. The table shows the trip point per appliance.

Note

The trip point of the pressure switch is not adjustable.

Pressure switch trip points

Appliance

Closing pressure

Opening pressure differential

 

differential

 

 

 

 

BFC

> 635 Pa

< 605 Pa

28

 

 

 

 

 

BFC

> 855 Pa

< 825 Pa

30

 

 

 

 

 

BFC

> 885 Pa

< 855 Pa

50

 

 

 

 

 

BFC

> 1085 Pa

< 1055 Pa

60

 

 

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 Introduction About the applianceWhat to do if you smell gas Regulations Target groups Maintenance Symbol Target groupIntroduction Gis Overview of this DocumentChapter 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 Gas connection Air supply and flue IntroductionRequirements 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 Connecting the mains voltage Isolating transformer10.2 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 connectionOperating modes Error conditions Service condition Status of the applianceOperating 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 Switching on the on mode Main menuNotational 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- on time Week program setting the switch- off 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 Service program Setting the hysteresisDisplaying the error history Setting the display backlight time Switching the pump on or offSetting the service interval Setting the display contrastTroubleshooting General errorsDisplayed 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 errorCode + Description Cause Solution Remark E01 blocking error E03 lock-out errorE04 lock-out error Page Interval Maintenance frequencyMaintenance frequency Introduction Preparation for maintenance Performing maintenancePerforming maintenance Descaling and cleaning the tank Water-side mainte- nance IntroductionChecking 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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