A.O. Smith 28 30 50 60 service manual Maintenance frequency, Determining service interval

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Introduction

11Maintenance frequency

11.1 Introduction	A service should be carried out at least once a year, both on the water side and
	on the gas side. Maintenance frequency depends, among other things, on the
	water quality, the average burning time per day and the set water temperature.

11.2Determining service interval

!!! WARNING !!!

MAX. BURNINGHOURS: SERVICE REQUIRED

Figure 11.1 Service required

nRemark

Regular maintenance extends the service life of the appliance.

nRemark

To determine the correct maintenance frequency, it is recommended to arrange for the service and maintenance engineer to check the appliance on both the water and gas side, three months after installation. Based on this check, the best maintenance frequency can be determined.

To aid servicing, the ThermoControl has a service interval which defines the frequency of maintenance by the service and maintenance engineer based on the number of burning hours.

The service interval can be set to: 500, 1000 or 1500 burning hours. The standard setting is 500 burning hours.

Example

In the first three months, the appliance has burnt 300 hours. During maintenance, it is evident that one service per year will be sufficient. So after one year, some 1200 burning hours will have elapsed. The first value below 1200 hours that can be selected is 1000 burning hours.

In this case, the service and maintenance engineer sets the interval to 1000.

Example

In the first three months, the appliance has burnt 300 hours. During maintenance, it is evident (perhaps due to the water quality) that service will be required at least once every 6 months. So after six months, some 600 burning hours will have elapsed. The first value below 600 hours that can be selected is 500 burning hours.

In this case, the service and maintenance engineer sets the interval to 500.

Once the set number of burning hours has elapsed, the message

SERVICE REQUIRED will appear on the display. See Figure 11.1. Once the message appears. contact should be made with the service and maintenance engineer.

Release R.1.3 UK

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Contents Release R.1.3 UK Your installer More information CopyrightTrademarks LiabilityPage Gis Table of contentsStarting up and shutting down Filling and drainingControl panel Status of the applianceMaintenance Service programTroubleshooting Maintenance frequencyIndex AppendicesAbout the appliance IntroductionWhat to do if you smell gas Regulations Introduction Target groups Maintenance Forms of notationSymbol Target group RemarkChapter Target groups Description Overview of thisDocument Overview of this documentGis Introduction Functioning of the applianceIntroduction Functional description of the appliance Appliance’s heating cycle Protection for the appliance Water temperature protection Gas controlPressure switch Ionisation rod 3 Fan Water temperature protectionPressure switch Gas controlIonisation rod Safety of the instal- lationUnvented installation Vented installationIntroduction Packaging Environmental conditions InstallationWorking clearances Humidity and ambient temperatureMaximum floor loading Water compositionWorking clearances Environmental conditionsPlan and elevation of the appliance Technical specificationsUnit BFC DimensionsTechnical specifications Dime Description BFC NsionVAC G30-30 mbar butane Installation diagramGas data GeneralUnvented InstallationCondensation drainage Water connections, Unvented Cold water sideHot water side Circulation pipeSee din Figure Water connections, VentedGas connection See paragraph ’3.6.4 Condensation drainage’Air supply and flue gas discharge Dimension BFCAir supply and flue gas discharge Concentric wall flue terminal Specification DescriptionConcentric roof flue terminal Concentric roof flue terminal specificationsPreparation Mains voltage Electrical connectionPreparation Electrical connection Mains voltageProgram-controlled pump Extra on mode switch Tank onIsolating Transformer Continuous pumpAppliance Connecting extra error signal Alarm OUTChecking the supply Pressure and burner Checking the supply pressure and burner pressureMain menu Conversion to a different gas category Conversion to a different gas categoryRemove the burner as complete assembly Check the burner and supply pressure see paragraph 13 Conversion of gas controlInstallation Filling the appliance Filling the appliance Filling unvented installationsFilling vented installations Filling and drainingFilling and draining Installation diagrams F d cDraining the appliance Draining unvented installationsDraining vented installations Draining the applianceGis Introduction Operating Control panelControl panel Explanation of the icons ON/OFF switch of ThermoControlNavigation buttons PC connectionIntroduction Operating modes Operating modes Error conditions Service conditionStatus of the appliance Status of the appliance Error conditionsService condition Service conditionGis Shutting down Open the gas valve see ’ .1 Installation diagrams’Starting up and shutting down Introduction Starting upStarting up and shutting down Shut the appliance down for a brief period OFF modeDisconnect the appliance from the mains Shut the appliance down for a longer periodAppliance’s heating cycle Appliance’s heating cycle12 Ignition Notational convention for menu-related instructions Main menuSetting water temperature during on mode Switching into on mode Setting the water temperatureSetting the water temperature via Setpoint Menu Changing the appliance’s standard week program Remark Week programme IntroductionStarting up and shutting down the week program Example Setting the switch-on timeSetting switch-off time Week programme Setting the water temperatureSetting program-controlled pump Adding times to a week program20 Period added Deleting times from a week program23 week program options Programming an extra period Extra periodSettings SettingsSetting menu language Displaying appliance specifications Remark Setting day and time46 Main menu Gis Displaying the error history Service programSetting the hysteresis Displaying the appliance history Setting the pump on/offSetting the service interval Service programSetting the display contrast Setting the display contrastSetting the backlight time Setting the display scroll speedService program Displayed errors TroubleshootingGeneral errors Symptom Cause Solution Remark Gas smell Gas leak Troubleshooting table for general errorsWater leakage Symptom Cause Solution Remark Display is offSee appendix ’A.2 Electrical diagram BFC’ Water Troubleshooting table for displayed errorsSymptom Cause Solution Remark Explosive ignition Insufficient or no hotS05 blocking error S02 blocking errorS03 blocking error S04 blocking errorS15 blocking error S13 blocking errorS14 blocking error F02 lock out error Phase-sensitive. See ’3.10 Electrical connection’Appliance specifications’ How to bleed air from the gas line, and measure the supply ’3.9 Air supply and flue gas discharge’ F06 lock out errorF07 lock out error F08 lock out errorF10 lock out error Error F09 remains active in the event that the waterRelease R.1.3 UK Release R.1.3 UK E04 blocking error C04 blocking errorE01 blocking error E03 blocking errorDetermining service interval Maintenance frequencyMaintenance frequency Remark Preparation for maintenance MaintenanceStarting up Maintenance Water-side mainte- nance Introduction Descaling and cleaning the tankCleaning condensation water discharge Cleaning the burnerRemark Finalising mainte- nance Cleaning the orificeCleaning heat exchanger 12.4.3Warranty Certificate Warranty Certificate Week program card AppendicesAppendices Electrical diagramWeek program card Release R.1.3 UK Index IX IndexIX Index 0306