A.O. Smith BFC -100, BFC - 80 service manual Starting and running

Page 54

9

Starting and running

gis

Once the appliance starts, it will run through the following steps:

1.The water temperature drops below the set temperature of (for example) 65°C. The electronic controller detects a demand and starts the heating cycle.

-The icon is activated.

-The message HEAT DEMAND appears.

a

ON Ê

13:45 Thursday 63ÉC

Tset 65ÉC

HEAT DEMAND

2.Once demand is registered, the fan is started to exhaust any gases that may be present. This phase is called pre-purge and lasts about 15 seconds.

-The icon is activated.

-The message PRE PURGE appears.

a

ON Ê Ê

13:45 Thursday 63ÉC

Tset 65ÉC

PRE PURGE

3.During the pre-purge, the pressure switch closes.

-The icon is activated.

-The message PRESSURE SWITCH appears.

5.After a number of seconds pre-glow, the gas control is opened and ignition takes place.

-The icon is activated.

-The message IGNITION appears.

a

ON

Ê

Ê Ê

13:45 Thursday

63ÉC

 

Tset 65ÉC

IGNITION

 

 

 

 

 

6.After ignition, the flame is detected and the appliance will be running. This means that actual heating has started. The fan speed then increases to the normal working speed, and the pressure switch closes:

-The icon is dimmed.

-The icons and are activated.

-The message RUNNING appears.

a

ON

Ê Ê

Ê Ê

13:45 Thursday

63ÉC

 

Tset 65ÉC

RUNNING

 

 

 

 

 

7.When the water is up to temperature, the heat demand drops off and the post-purge starts. This lasts about 25 seconds.

-The icons , and are dimmed.

-The icon is activated.

-The message POST PURGE appears.

a

ON

Ê Ê Ê

 

13:45 Thursday

63ÉC

 

Tset 65ÉC

PRESSURE

SWITCH

 

 

 

4.After some time, the pre-purge ceases and the electronic controller reduces the fan speed to the ignition speed. This is followed by the (pre-)glow of the hot surface igniter.

-The icons and are dimmed

-The icon is activated.

a

ON

Ê

Ê

13:45 Thursday

63ÉC

 

Tset 65ÉC

GLOW PLUG

 

 

 

 

 

a

ON

Ê Ê

 

13:45 Thursday

65ÉC

 

Tset 65ÉC

POST PURGE

 

 

 

 

 

8.Following the post-purge, the fan stops and the pressure switch opens:

-The icons and are dimmed.

-The message POST PURGE vanishes.

a

ON

14:05 Thursday 65ÉC

With any subsequent heat demand, the heating cycle will resume from step 1.

54

Instruction manual BFC

Page 53 Page 55
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Page 53 Page 55
Contents 100 Your installer Liability Read this manual carefullyTrademarks More informationGis Table of contents Maintenance frequency Service programTroubleshooting Performing maintenanceAppendices Table of contents Introduction About the applianceWhat to do if you smell gas Regulations Target groups Maintenance Forms of notation Symbol Target groupIntroduction Overview of this DocumentChapter Target groups Description Gis Working principle of the appliance General working principle of the applianceWater temperature protection TheGas valve Appliances heating cycle Protection for the applianceWorking principle of the appliance Gas valve Water temperature protectionPressure switch 4 FanVented installation Safety of the installationUnvented installation Flame probeEnvironmental InstallationPackaging ConditionsWater composition Air humidity and ambient temperatureMaximum floor load Working clearancesTechnical specifications Dimensions of the appliance General and electrical specifications Dimen Description BFC SionUnit BFC Gas data Description II2H3P Unit BFC Natural gasInstallation diagram Hot water side Water connections, VentedCold water side Circulation pipeWater connections, Unvented Gas connection Air supply and flue IntroductionRequirements for flue gas discharge materials C43 B23 C33 C13 C53 Type of appliance Description Concentric connectionsPractical example of concentric flue gas discharge Appliance Diameter Maximum length Number BendsSpecifications Appliance with concentric flue gas discharge materialConcentric wall flue terminal specifications C13 Subject DescriptionParallel connections Practical example of parallel flue gas dischargePreparation Connecting the mains voltage Electrical connectionPreparation Connecting the mains voltage Isolating transformer10.2 Preparation Connecting an extra error signal Alarm OUT Connecting a program-controlled pumpConnecting an extra on mode switch Tank on Checking the supply pressure and burner pressureProcedure to check pressures 11.1Gas data Finalising Adjusting the pressure11.3 Finish off 3.11.4 FinalisingOrifice assembly Conversion to a different gas categoryConversion to a different gas category Start 9 Starting and running the applianceInstallation diagram FillingFilling the appliance Filling unvented installationsFilling vented installations FillingDraining Draining Min Gis Controls Electronic controller ON/OFF switchControl panel Meaning of iconsPC connection Control panelOperating modes Error conditions Service condition Status of the applianceOperating modes Status of the appliance Error conditionsManual 13 Troubleshooting Menu 11 Main menu chapterService condition Manual 14 Maintenance frequencyGis Appliances heating cycle Open 3.5 Installation diagram the manual gas valveStarting and running Starting and running Appliances heating cycleStarting and running Electrically isolating the appliance Shut the appliance down for a brief period OFF modeShutting down Shutting the appliance down for a long periodShutting down Main menu Switching on the on modeSetting water temperature during on mode Notational convention for menu-related instructionsChanging the appliances standard week program Week program setting the switch- on timeStarting and stopping the week program Main menuWeek program setting the program- controlled pump Week program setting the switch- off timeWeek program setting the water temperature Adding times to a week programPump 11.6.4 Week program setting the program-controlled pump Deleting times from a week programSetting the switch-on time Extra periodProgramming an extra period Settings Setting menu languageSetting day and time Displaying appliance specificationsRelevant display appears Service program Setting the hysteresisDisplaying the error history Setting the display contrast Switching the pump on or offSetting the service interval Setting the display backlight timeTroubleshooting General errorsDisplayed errors Display is off Troubleshooting table for general errorsSymptom Cause Solution Remark Gas smell Start the appliance up 9 Starting and runningHot water supply Symptom Cause Solution Remark Water leakageExplosive ignition Insufficient or absentDisplayed errors S14 blocking error Code + Description Cause Solution Remark S12 blocking errorS13 blocking error S15 blocking errorCode + Description Cause Solution Remark F02 lock out error Code + Description Cause Solution Remark Check the values 2.4.5 Pressure switchReplaced Appliance Code + Description Cause Solution Remark F03 lock out errorMaintenance 15.2 Preparation for maintenance. If there is FlueCode + Description Cause Solution Remark F04 lock out error F05 lock out errorF08 lock out error Code + Description Cause Solution Remark F06 lock out errorF07 lock out error F09 lock out errorCode + Description Cause Solution Remark F10 lock out error F11 blocking errorC04 blocking error Code + Description Cause Solution Remark C02 lock out errorC03 blocking error Selected applianceCode + Description Cause Solution Remark E01 blocking error E03 lock-out errorE04 lock-out error Maintenance frequency IntervalMaintenance frequency Performing maintenance Introduction Preparation for maintenancePerforming maintenance Water-side maintenance Introduction Descaling and cleaning the tankChecking the anodes Clean the burners Cleaning condensation water dischargeGas-side maintenance Finalizing maintenance Introduction Clean the orifices16.2 Tank warranty Warranty certificate16.1 General warranty Conditions for Installation and useWarranty certificate Appendices Week program cardBFC Electrical Diagram AppendicesTerminal Block Connections Appendices Tset Pump Week program cardPeriod Example PeriodPage Index 0308 Index

BFC - 80, BFC -100 specifications

A.O. Smith is a renowned name in the water heater industry, and its BFC series, which includes the BFC-100 and BFC-80 models, exemplifies their commitment to innovation and efficiency. These units are designed to meet the demanding needs of both residential and commercial applications, providing reliable hot water solutions.

The A.O. Smith BFC-100 and BFC-80 are distinguished by their high capacity and robust design. The BFC-100 model boasts a capacity of 100 gallons, while the BFC-80 is ideal for those requiring 80 gallons. This makes them suitable for larger households or commercial establishments where hot water demand can be significant.

One of the primary features of these models is their advanced heating technology. Both units utilize a high-efficiency burner that ensures rapid heating and minimal energy consumption. This means users benefit from shorter wait times for hot water, reducing overall energy costs. The BFC series is also equipped with a special flame retention head that enhances combustion efficiency and prolongs the lifespan of the unit.

In terms of construction, the BFC-100 and BFC-80 models are built with high-quality materials that enhance durability and resistance to corrosion. The tanks are insulated with high-density foam, which improves energy retention and helps maintain water temperature for longer periods. This is crucial for conserving energy and minimizing heating costs.

Safety is a top priority for A.O. Smith, and the BFC series reflects this commitment. Each unit comes with a range of safety features, including a temperature and pressure relief valve that prevents overheating and excessive pressure buildup. Additionally, they are designed to meet strict industry standards, ensuring peace of mind for users.

Installation of both models is straightforward, with flexible venting options that accommodate various building layouts. Whether you are upgrading an existing water heating system or installing a new one, the BFC series is designed to integrate seamlessly.

In summary, the A.O. Smith BFC-100 and BFC-80 are excellent options for those seeking reliable, efficient, and durable water heating solutions. With their impressive capacity, advanced heating technology, robust construction, and safety features, these models stand out in the market and are sure to meet the hot water needs of any household or commercial space. Whether for residential use or in a business setting, A.O. Smith’s BFC series represents quality and innovation in hot water heating.
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