A.O. Smith 28 30 50 60 service manual Draining the appliance, Draining unvented installations

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gis

4.3Draining the appliance

4.3.1

MENU »OFF ^ ON

È WEEK PROGRAM

Figure 4.2 Main menu

0

I

Figure 4.3 ThermoControl

Draining the appliance

Draining unvented installations

Some service activities require the appliance to be drained. The procedure is as follows:

1.Activate the MENU with B.

2.Use Hand Lto place the cursor beside OFF. See Figure 4.2.

3.Confirm OFF with E.

4.Wait until the fan has stopped. The S icon is then dimmed.

cNote

Failure to wait until the fan stops can cause damage to the appliance.

5.Turn the appliance OFF (position 0) using the ON/OFF switch on the control panel. See Figure 4.3.

6.Disconnect the appliance by putting the mains switch between the appliance and the mains power supply to position 0.

7.Shut off the gas supply h.

8.Close the stop valve i in the hot water pipe.

9.Close the supply valve of the cold water supply a.

10.Open the drain valve g.

11.Bleed the appliance (or installation) so that it drains completely empty.

4.3.2Draining vented installations

Some service activities require the appliance to be drained. The procedure is as follows:

1.Activate the MENU with B.

2.Use Hand Lto place the cursor beside OFF. See Figure 4.2.

3.Confirm OFF with E.

4.Wait until the fan has stopped. The S icon is then dimmed.

cNote

Failure to wait until the fan stops can cause damage to the appliance.

5.Turn the appliance OFF (position 0) using the ON/OFF switch on the control panel. See Figure 4.3.

6.Disconnect the appliance by putting the mains switch between the appliance and the mains power supply to position 0.

7.Shut off the gas supply h.

8.Close the stop valve i in the hot water pipe.

9.Close the stop valve between the water cistern and the cold water inlet.

10.Open the drain valve g.

11.Bleed the appliance (or installation) so that it drains completely empty.

Release R.1.3 UK

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Contents Release R.1.3 UK Your installer Trademarks CopyrightLiability More informationPage Gis Table of contentsControl panel Filling and drainingStatus of the appliance Starting up and shutting downTroubleshooting Service programMaintenance frequency MaintenanceIndex AppendicesAbout the appliance IntroductionWhat to do if you smell gas Regulations Symbol Target group Target groups Maintenance Forms of notationRemark IntroductionDocument Overview of thisOverview of this document Chapter Target groups DescriptionGis 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 Pressure switch Water temperature protectionGas control 3 FanUnvented installation Safety of the instal- lationVented installation Ionisation rodIntroduction Packaging Environmental conditions InstallationMaximum floor loading Humidity and ambient temperatureWater composition Working clearancesWorking clearances Environmental conditionsPlan and elevation of the appliance Technical specificationsTechnical specifications DimensionsDime Description BFC Nsion Unit BFCVAC Gas data Installation diagramGeneral G30-30 mbar butaneUnvented InstallationHot water side Water connections, Unvented Cold water sideCirculation pipe Condensation drainageGas connection Water connections, VentedSee paragraph ’3.6.4 Condensation drainage’ See din FigureAir 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 voltageIsolating Transformer Extra on mode switch Tank onContinuous pump Program-controlled pumpChecking the supply Pressure and burner Connecting extra error signal Alarm OUTChecking 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 Check the burner and supply pressure see paragraph 13 Conversion of gas controlInstallation Filling vented installations Filling the appliance Filling unvented installationsFilling and draining Filling the applianceFilling and draining Installation diagrams F d cDraining vented installations Draining unvented installationsDraining the appliance Draining the applianceGis Introduction Operating Control panelNavigation buttons Explanation of the icons ON/OFF switch of ThermoControlPC connection Control panelIntroduction Operating modes Operating modes Error conditions Service conditionStatus of the appliance Status of the appliance Error conditionsService condition Service conditionGis Starting up and shutting down Open the gas valve see ’ .1 Installation diagrams’Introduction Starting up Shutting downDisconnect the appliance from the mains Shut the appliance down for a brief period OFF modeShut the appliance down for a longer period Starting up and shutting downAppliance’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 Setting program-controlled pump Setting the water temperatureAdding times to a week program Week programme20 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 Setting the service interval Setting the pump on/offService program Displaying the appliance historySetting the backlight time Setting the display contrastSetting the display scroll speed Setting the display contrastService 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’ Symptom Cause Solution Remark Explosive ignition Troubleshooting table for displayed errorsInsufficient or no hot WaterS03 blocking error S02 blocking errorS04 blocking error S05 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 F07 lock out error F06 lock out errorF08 lock out error ’3.9 Air supply and flue gas discharge’F10 lock out error Error F09 remains active in the event that the waterRelease R.1.3 UK Release R.1.3 UK E01 blocking error C04 blocking errorE03 blocking error E04 blocking errorDetermining service interval Maintenance frequencyMaintenance frequency Remark Preparation for maintenance MaintenanceStarting up Maintenance Cleaning condensation water discharge Descaling and cleaning the tankCleaning the burner Water-side mainte- nance IntroductionCleaning heat exchanger Cleaning the orifice12.4.3 Remark Finalising mainte- nanceWarranty Certificate Warranty Certificate Week program card AppendicesAppendices Electrical diagramWeek program card Release R.1.3 UK Index IX IndexIX Index 0306