A.O. Smith 28 30 50 60 Filling and draining, Filling the appliance Filling unvented installations

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Introduction

4Filling and draining

4.1 Introduction	Topics covered in this chapter:
	•	Filling the appliance.
	•	Draining the appliance.

The components referred to in these paragraphs are illustrated in Figure 4.1.

4.2Filling the appliance

4.2.1Filling unvented installations

To fill the appliance, proceed as follows.

1.Open the stop valve i in the hot water pipe and, if present, the stop valves d for the circulation pump.

2.Shut drain valve g.

3.Open the nearest hot water draw-off point l.

4.Open the supply valve i on the cold water side aso that cold water flows into the appliance.

5.Completely fill the appliance (when cold water flows at normal pressure from the nearest hot water draw-off point, the appliance is full).

6.Bleed the entire installation of air, for example by opening all hot water draw- off points.

7.The appliance is now under water supply pressure. There should be no water coming out of the overflow valve m nor the T&P valvec. If this does happen, the cause might be:

-The water supply pressure is greater than the specified 8 bar. Rectify this by fitting a pressure-reducing valve a.

-The overflow valve in the protected cold supply setup is defective or incorrectly fitted.

4.2.2Filling vented installations

To fill the appliance, proceed as follows.

1.Open the stop valve i in the hot water pipe and, if present, the stop valves d for the circulation pump.

2.Shut drain valve g.

3.Open the nearest hot water draw-off point l.

4.Open the supply valve i on the cold water side aso that cold water flows into the appliance.

5.Completely fill the appliance (when cold water flows at normal pressure from the nearest hot water draw-off point, the appliance is full).

6.Bleed the entire installation of air, for example by opening all hot water draw- off points.

7.The appliance is now under water supply pressure. There should be no water coming out of the T&P valve c. If this does happen, the T&P valve might be defective or incorrectly fitted.

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 AppendicesIntroduction What to do if you smell gas RegulationsAbout the appliance Introduction Target groups Maintenance Forms of notationSymbol Target group RemarkChapter Target groups Description Overview of thisDocument Overview of this documentGis Functioning of the appliance Introduction Functional description of the applianceIntroduction Water temperature protection Gas control Pressure switch Ionisation rodAppliance’s heating cycle Protection for the appliance 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’Dimension BFC Air supply and flue gas dischargeAir supply and flue gas discharge Concentric wall flue terminal Specification DescriptionConcentric roof flue terminal Concentric roof flue terminal specificationsElectrical connection PreparationPreparation Mains voltage 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 connectionOperating modes Error conditions Service condition Status of the applianceIntroduction Operating modes 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 menuSwitching into on mode Setting the water temperature Setting the water temperature via Setpoint MenuSetting water temperature during on mode Week programme Introduction Starting up and shutting down the week programChanging the appliance’s standard week program Remark Setting the switch-on time Setting switch-off timeExample 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 Setting menu languageSettings Displaying appliance specifications Remark Setting day and time46 Main menu Gis Service program Setting the hysteresisDisplaying the error history 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 Troubleshooting General errorsDisplayed errors Symptom Cause Solution Remark Gas smell Gas leak Troubleshooting table for general errorsSymptom Cause Solution Remark Display is off See appendix ’A.2 Electrical diagram BFC’Water leakage Water Troubleshooting table for displayed errorsSymptom Cause Solution Remark Explosive ignition Insufficient or no hotS05 blocking error S02 blocking errorS03 blocking error S04 blocking errorS13 blocking error S14 blocking errorS15 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