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

A.O. Smith 28 30 50 60 service manual Ignition

Models: 28 30 50 60

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7

Starting up and shutting down

gis


ON	Ê	Ê Ê
13:45 Thursday		63ÉC
	Tset 65ÉC
IGNITION
Figure 7.12 Ignition


ON	Ê Ê	Ê Ê
13:45 Thursday		63ÉC
	Tset 65ÉC
RUNNING
Figure 7.13 Running


ON	Ê Ê
13:45 Thursday		65ÉC
	Tset 65ÉC
POST PURGE

Figure 7.14 Post-purge

ON

14:05 Thursday 65ÉC

Figure 7.15 Running

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

-The G icon is activated.

-The message IGNITION appears.

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

-The O icon is dimmed.

-The V and D icons are activated.

-The message RUNNING appears.

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

-The W, G and V icons are dimmed.

-The S icon is activated.

-The message POST PURGE appears.

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

-The D and S icons are dimmed.

-The message POST PURGE disappears.

At the first subsequent heat demand, the heating cycle will resume from step 1.

52	Instruction Manual BFC

Image 52

A.O. Smith 28 30 50 60 service manual Ignition

Contents

Release R.1.3 UK Your installer Copyright TrademarksLiability More informationPage Table of contents GisFilling and draining Control panelStatus of the appliance Starting up and shutting downService program TroubleshootingMaintenance frequency MaintenanceAppendices IndexWhat to do if you smell gas Regulations IntroductionAbout the appliance Target groups Maintenance Forms of notation Symbol Target groupRemark IntroductionOverview of this DocumentOverview of this document Chapter Target groups DescriptionGis Introduction Functional description of the appliance Functioning of the applianceIntroduction Pressure switch Ionisation rod Water temperature protection Gas controlAppliance’s heating cycle Protection for the appliance Water temperature protection Pressure switchGas control 3 FanSafety of the instal- lation Unvented installationVented installation Ionisation rodInstallation Introduction Packaging Environmental conditionsHumidity and ambient temperature Maximum floor loadingWater composition Working clearancesEnvironmental conditions Working clearancesTechnical specifications Plan and elevation of the applianceDimensions Technical specificationsDime Description BFC Nsion Unit BFCVAC Installation diagram Gas dataGeneral G30-30 mbar butaneInstallation UnventedWater connections, Unvented Cold water side Hot water sideCirculation pipe Condensation drainageWater connections, Vented Gas connectionSee paragraph ’3.6.4 Condensation drainage’ See din FigureAir supply and flue gas discharge Dimension BFCAir supply and flue gas discharge Specification Description Concentric wall flue terminalConcentric roof flue terminal specifications Concentric roof flue terminalPreparation Electrical connectionPreparation Mains voltage Mains voltage Electrical connectionExtra on mode switch Tank on Isolating TransformerContinuous pump Program-controlled pumpConnecting extra error signal Alarm OUT Checking the supply Pressure and burnerChecking the supply pressure and burner pressure ApplianceMain menu Conversion to a different gas category Conversion to a different gas categoryRemove the burner as complete assembly 13 Conversion of gas control Check the burner and supply pressure see paragraphInstallation Filling the appliance Filling unvented installations Filling vented installationsFilling and draining Filling the applianceInstallation diagrams F d c Filling and drainingDraining unvented installations Draining vented installationsDraining the appliance Draining the applianceGis Control panel Introduction OperatingExplanation of the icons ON/OFF switch of ThermoControl Navigation buttonsPC connection Control panelStatus of the appliance Operating modes Error conditions Service conditionIntroduction Operating modes Error conditions Status of the applianceService condition Service conditionGis Open the gas valve see ’ .1 Installation diagrams’ Starting up and shutting downIntroduction Starting up Shutting downShut the appliance down for a brief period OFF mode Disconnect the appliance from the mainsShut the appliance down for a longer period Starting up and shutting downAppliance’s heating cycle Appliance’s heating cycle12 Ignition Main menu Notational convention for menu-related instructionsSetting the water temperature via Setpoint Menu Switching into on mode Setting the water temperatureSetting water temperature during on mode Starting up and shutting down the week program Week programme IntroductionChanging the appliance’s standard week program Remark Setting switch-off time Setting the switch-on timeExample Setting the water temperature Setting program-controlled pumpAdding times to a week program Week programmeDeleting times from a week program 20 Period added23 week program options Extra period Programming an extra periodSetting menu language SettingsSettings Setting day and time Displaying appliance specifications Remark46 Main menu Gis Setting the hysteresis Service programDisplaying the error history Setting the pump on/off Setting the service intervalService program Displaying the appliance historySetting the display contrast Setting the backlight timeSetting the display scroll speed Setting the display contrastService program General errors TroubleshootingDisplayed errors Troubleshooting table for general errors Symptom Cause Solution Remark Gas smell Gas leakSee appendix ’A.2 Electrical diagram BFC’ Symptom Cause Solution Remark Display is offWater leakage Troubleshooting table for displayed errors Symptom Cause Solution Remark Explosive ignitionInsufficient or no hot WaterS02 blocking error S03 blocking errorS04 blocking error S05 blocking errorS14 blocking error S13 blocking errorS15 blocking error Phase-sensitive. See ’3.10 Electrical connection’ F02 lock out errorAppliance specifications’ How to bleed air from the gas line, and measure the supply F06 lock out error F07 lock out errorF08 lock out error ’3.9 Air supply and flue gas discharge’Error F09 remains active in the event that the water F10 lock out errorRelease R.1.3 UK Release R.1.3 UK C04 blocking error E01 blocking errorE03 blocking error E04 blocking errorMaintenance frequency Determining service intervalMaintenance frequency Maintenance Remark Preparation for maintenanceStarting up Maintenance Descaling and cleaning the tank Cleaning condensation water dischargeCleaning the burner Water-side mainte- nance IntroductionCleaning the orifice Cleaning heat exchanger12.4.3 Remark Finalising mainte- nanceWarranty Certificate Warranty Certificate Appendices Week program cardElectrical diagram AppendicesWeek program card Release R.1.3 UK IX Index Index0306 IX Index