A.O. Smith BFC - 30, BFC - 60 Working principle of the appliance, Appliances heating cycle

Page 13

gis

2Working principle of the appliance

2.1

Introduction

Topics covered in this chapter:

 

 

• General working principle of the appliance;

 

 

• The appliance's heating cycle;

 

 

•

Protection for the appliance;

 

 

•

Safety of the installation.

2.2

General working

The figure shows a cut-away view of the appliance.

 

principle of the

Cut-away view of the appliance

 

appliance

Legend

1

Only applicable numbers are

2

mentioned.

 

1.

cover

3

 

2.

hot water outlet

4

3.

electrical connector block

 

4.

electronic controller

5

 

 

5.

pressure switch

6

6.

control panel

 

7.

temperature sensor T1

 

8.

combustion chamber

 

9.

anode

7

 

10. tank

8

11.heat exchanger

12.inspection and cleaning opening 9

13.temperature sensor T2

14. cold water inlet

10

 

15. drain valve

11

16. gas control

 

17. burner

 

18. fan

 

19. air supply hose

 

20. hot surface igniter

 

21. flame probe

 

22. chimney pipe

12

23. siphon

 

24. insulation layer

 

 

13

14

15

16

17

18

19

20

21

22

23

24

IMD-0070 R1

Instruction manual BFC

13

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Contents
Installation User Your installer Trademarks Read this manual carefullyLiability More informationGis Table of contents Troubleshooting Service programMaintenance frequency Performing maintenanceAppendices Table of contents About the appliance Introduction What to do if you smell gas Regulations Symbol Target group Target groups MaintenanceIntroduction Gis Document Overview of thisChapter Target groups Description Working principle of the appliance Safety of the installationGeneral working principle of the appliance Appliances heating cyclePressure switch Flame probe Water temperature protection TheGas valveAppliances heating cycle Protection for the appliance Working principle of the appliancePressure switch Water temperature protectionGas valve 4 FanUnvented installation Safety of the instal- lationVented installation Flame probePackaging InstallationEnvironmental ConditionsAppliance maximum floor load Air humidity and ambient temperatureWater composition Working clearancesWorking clearances Technical specifica- tions Dimensions of the applianceDimen Description General and electrical specificationsSion Unit BFCDescription II2H3+ Unit Gas dataGas category 2H G20 20 mbar General 3+Installation diagram Cold water side Water connections, UnventedHot water side Circulation pipeWater connections, Vented Air supply and flue Introduction Gas connectionRequirements for flue gas discharge materials C43 B23 C33 C13 C53 Practical example of concentric flue gas discharge Concentric connectionsType of appliance Description Appliance Diameter Maximum length Number of 90º BendsAppliance 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 a program-controlled pump Connecting continuous pumpConnecting an extra on mode switch Tank on Connecting an extra error signal Alarm OUT11.1 Checking the supply pressure and burner pressureProcedure to check pressures Finalising Adjusting the pressureGas data Finish off 3.11.4 FinalisingConversion 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 vented installations Filling unvented installationsFilling the appliance FillingDraining Draining Min Gis Control panel Electronic controller ON/OFF switchControls Meaning of iconsControl panel PC connectionStatus of the appliance Operating modes Error conditions Service conditionOperating modes Manual 13 Troubleshooting Error conditionsStatus of the appliance Menu 11 Main menu chapterManual 14 Maintenance frequency Service conditionGis Starting and running Open 3.5 Installation diagram the manual gas valveAppliances heating cycle Starting and running Appliances heating cycleStarting and running Shutting down Shut the appliance down for a brief period OFF modeElectrically isolating the appliance Shutting the appliance down for a long periodShutting down Main menu Switching on the on modeNotational convention for menu-related instructions Week program Setting water temperature during on modeStarting and stopping the week program Changing the appliances standard 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 switch-off time Setting the switch-on timeSetting the water temperature Setting the program-controlled pumpSetting menu language SettingsSetting day and time Adjustable settingsDisplaying appliance specifications Setting the hysteresis Service programDisplaying the error history Setting the service interval Switching the pump on or offSetting the display contrast Setting the display backlight timeGeneral errors TroubleshootingDisplayed errors Symptom Cause Solution Remark Gas smell Troubleshooting table for general errorsDisplay is off Start the appliance up 9 Starting and runningExplosive ignition Symptom Cause Solution Remark Water leakageHot water supply Insufficient or absentTroubleshooting table for displayed errors Displayed errors S13 blocking error Code + Description Cause Solution Remark S12 blocking errorS14 blocking error S15 blocking errorCode + Description Cause Solution Remark F02 lock out error Check the values 2.4.5 Pressure switch Code + Description Cause Solution RemarkMaintenance 15.2 Preparation for maintenance. If there is Code + Description Cause Solution Remark F03 lock out errorAppliance FlueF05 lock out error Code + Description Cause Solution Remark F04 lock out errorF07 lock out error Code + Description Cause Solution Remark F06 lock out errorF08 lock out error F09 lock out errorF11 blocking error Code + Description Cause Solution Remark F10 lock out errorC03 blocking error Code + Description Cause Solution Remark C02 lock out errorC04 blocking error Selected applianceE03 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 Clean the burners Cleaning condensation water dischargeClean the orifices Cleaning the heat exchanger Finalizing mainte- nance16.1 General warranty Warranty certificate16.2 Tank warranty Conditions for Instal- lation and useWarranty certificate Appendices Electrical diagramAppendices Electrical diagramTerminal Block Connections Appendices Period Week program cardTset Pump Example PeriodPage Index Index 0306
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