Users Instructions And Customer Care Guide

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Users Instructions andCustomer Care GuideGreenstar HE plus combiCondensing boiler6 720 610 598-00.1O6 720 610 598 GB (01.07) OSWZWBR 7-28 HE plus GC-Number: 47 311 56ZWBR 11-35 HE plus GC-Number: 47 311 57

ContentsContentsExcellence comes as standard4Safety precautions51General g the AppliancePreparationSwitching the Appliance On/OffSwitching on the Central HeatingControlling Central HeatingSetting the Hot Water TemperatureSummer Mode, Hot Water OnlyFrost protectionFault DisplayGeneral DescriptionProgrammingDeleting a settingResetting all parameters to their original settingsMenu structureSetting the time/daySetting the time and dayHolidaysHeatingHeating programSetting the Economy temperature18181821212223232324242526 720 610 598 GB (01.07)

Contents4. waterHot water programHot water immediatelyi InfoSettingsHeating (TR 2)ServiceIndividual timer programmes26262627282828305Fault finding316Tips on saving energy327General Information348Maintaining your appliance349Service centres3510Fault or breakdown3611Your Bosch guarantee3712Guarantee registration3813Operating Instructions Quick Reference406 720 610 598 GB (01.07)3

Excellence comes as standardExcellence comes as standardThank you for purchasing a Worcester Greenstar condensingappliance.The Worcester Greenstar Series has been developed by theBosch Group and the strictest quality control standards aredemanded throughout every stage of production.Indeed, the Bosch Group have led the field in innovative appliance design and performance for many years.The result is that your new Greenstar appliance offers you the verybest of everything – quality, efficiency, economical running costs,proven reliability and value for money.What’s more, you also have the assurance of our no nonsense2 year parts and labour guarantee.And it’s backed up by Worcester Care Call a complete maintenance scheme to keep your boiler operating at peak condition andefficiency.No wonder that more and more people are agreeing that when itis gas, it has to be a Worcester Condensing appliance.BenchmarkThe “Benchmark” initiative is the new code of practice to encourage the correct installation, commissioning and servicing ofdomestic central heating boilers and system equipment.The “log-book” is a vital document that must be completed by theinstaller at the time of installation. It confirms that the boiler hasbeen installed and commissioned according to the manufacturersinstructions.Without the completion of the “log-book”, manufacturers mayrefuse to respond to a call–out from a householder, who will beadvised that he or she must call back the installer, who has not fulfilled his obligations to record the information required by the initiative.46 720 610 598 GB (01.07)

Safety precautionsSafety precautionsGas Safety (Installation and Use) Regulations 1998It is the law that all gas appliances are installed by a competentperson in accordance with the above regulations. Failure to installappliances correctly could lead to prosecution. It is in your interest, and that of safety, to ensure compliance with the law.If you smell gas:yTurn off gas service cock at the meter.yOpen all doors and windows.yDo not operate any electrical switches.yDo not smoke.yExtinguish any naked flames.yCall your gas company.If you smell fumes from the appliance:ySwitch off appliance.yOpen windows and doors.yInform your heating engineer.Fitting and modificationsyFitting of the appliance or any modifications to the appliancemay only be carried out by a competent person.yFlue systems must not be modified in any way.MaintenanceyWe recommend that you take out a maintenance contractwith a competent installer and have the appliance serviced atregular intervals.yEnsure that your Service Engineer uses only genuine spareparts!6 720 610 598 GB (01.07)5

Safety precautionsCombustible materialsyDo not store or use any combustible materials (paper, thinners, paints etc.) in the vicinity of the appliance.Health and safetyyThis appliance contains no asbestos products.yThere is no potential hazard due to the appliance being electrically unsafe.yThere are no substances used in the construction that are apotential hazard in relation to the COSHH Regulations (Control of Substances Hazardous to Health Regulations 1988).Combustion Air/Ambient AiryKeep combustion air/ambient air free of corrosive substances(e. g. halogenated hydrocarbons which contain chlorine or fluorine compounds). In this way corrosion can be prevented.66 720 610 598 GB (01.07)

General notes1General notesTo get the best from your appliance please read these instructions carefully.Sealed heating systemsThe appliance is fitted to a sealed heating system which is prepressurised. Your installer will tell you of the minimum and maximum pressure which must be indicated on the pressure gauge.Check regularly that the pressure is maintained and contact yourinstaller or maintenance engineer if there is a permanent significant drop in the pressure. If the system loses pressure it shouldbe repressurised and the cause of the fall investigated.Central heating systemsDuring the first few hours of operation of the central heating system, check that all radiators are being heated at an even rate. Ifthe top of a radiator is at a lower temperature than the bottom thenit should be vented by releasing air through the venting screw atthe top of the radiator. Ask your installer to show you how this isdone. Repeated venting will reduce the quantity of water in thesystem and this must be replenished for safe and satisfactoryoperation of the appliance.Should water leaks be found in the system or excessive venting isrequired then a service engineer must be contacted to inspect theinstallation and rectify any fault.Only additives that are compatible with aluminium may be used inthe system. Any incompatible additive used will invalidate theguarantee.Condensate drainThis is a condensing appliance and the terminal will, at times, giveout a plume of water vapour. This is quite normal.The appliance produces quantities of condense which is discharged regularly through the siphon.6 720 610 598 GB (01.07)7

General notesClearancesYour installer will have provided adequate space around the appliance for safety and servicing access. Do not restrict this spacewith the addition of cupboards, shelves etc. next to the appliance.Left-hand side100 mmRight-hand side100 mmIn Front600 mmAbove Casing (Vert. Flue)75 mmAbove Flue Turret30 mmBelow250 mmTable 1Room thermostatA room thermostat with volt free contacts (i.e. battery operated)may be fitted to control the central heating. Refer to the instructions supplied with the thermostat for information on siting andsetting. A programmable thermostat may also be used with thisappliance to provide additional timed control of the central heating.Thermostatic radiator valvesIt is recommended that this type of valve is fitted to all the radiators except one, usually the bathroom radiator. They should conform to the requirements of BS2767:10.Showers, bidets, taps and mixing valvesStandard hot and cold taps and mixing valves must be suitable foroperating at mains pressure. Thermostatically controlled or pressure equalising shower valves will guard against the flow of waterat too high a temperature.Hot and cold mains fed water can be supplied directly to an overrim flushing bidet subject to local water company requirements.With all mains fed systems the flow of water from individual tapswill vary with the number of outlets operated simultaneously andthe cold water mains supply pressure to the property.86 720 610 598 GB (01.07)

General notesFlow balancing using “ball-o-fix” type valves is recommended toavoid an excessive reduction in flow to individual outlets.For further information contact Worcester Heat Systems Technical Services Department.Hot and cold flowThe flow of water demanded from both hot and cold service outlets is dependent upon the mains supply, it may not be possiblein some installations to operate all outlets simultaneously.Water mains failureIf there is a failure of the mains water supply then no water will beavailable at a tap or shower until the mains supply is restored. Theappliance will still operate in the central heating mode.Use in hard water areasIn exceptionally hard water areas a device to prevent scale formation may be fitted. Installation of a scale inhibitor assembly shouldbe in accordance with the requirements of the local water company. An isolating valve should be fitted to allow for servicing.Alternatively the maximum temperature of the domestic hot watermay be reset to about 45 C which will reduce the risk of scaleformation in these hard water areas.VentilationThis is a room sealed appliance and does not require any air forcombustion from inside the house. If the appliance is fitted into acupboard or a compartment is built around the appliance afterinstallation then the compartment must be separated from theboiler space by a perforated non-combustible partition asdescribed in BS6798:87.Notwithstanding the requirements of BS6798:87, there is noneed for ventilation openings to be provided in the compartmentbecause of the low heat loss from the casing.Do not allow the flue terminal fitted on the outside wall to becomeobstructed or damaged.PumpThe pump will have been set by the manufacturer and must not bemanually re-adjusted.6 720 610 598 GB (01.07)9

Controls2Controls136 36561317 366 367 363 310 400ECO3648.1135E2951701711721731706 720 610 598-01.1OFig. 010System Pressure gaugeReset buttonMaster switchCentral heating temperature controlService valves in CH flow and returnHot waterGas isolation valve (open)Cold water inletIdentification stickerHot water temperature controlDisplayIndicator lamp for “burner on”Indicator lamp for “off/on”“Chimney sweep” buttonService button“ECO” buttonText Display6 720 610 598 GB (01.07)

Operating the Appliance3Operating the Appliance3.1PreparationTurn on the gas cock (172).y Press in the handle and turn it anti-clockwise as far as the stop(when handle is in line with direction of flow, the cock is open).Central heating system valves (170)y Using a spanner, turn square nut until groove is in line withdirection of flow (see detail).Groove at right angles to direction of flow off.Cold water inlet valve (173)yTurn handle so that it is in line with direction of flow.When handle is at right angles to direction of flow, the valve isclosed.1701721736 720 610 598-02.1OFig. 26 720 610 598 GB (01.07)11

Operating the ApplianceCheck the central heating system pressureyThe pointer on the pressure gauge (8.1) should be about1 bar.yIf the pointer is below 1 bar (when the system is cold), top upthe system with water until the pointer is 1 bar. Your installerwill have shown you how to do this.yThe maximum operating pressure of 2.5 bar at maximumcentral heating flow temperature must not be exceeded. If thepressure increases to 3 bar then the relief valve (15) opens.23140bar8.1E151701711721731706 720 610 598-03.1OFig. 3126 720 610 598 GB (01.07)

Operating the Appliance3.2Switching the Appliance On/OffSwitching onySwitch on the appliance at the master switch (I).The indicator lamp shows green and the display will show thecentral heating flow temperature, when the appliance is operating in the central heating mode.6 720 610 333-04.1OFig. 4iIf the display alternates between -II- and the central heating flow temperature, the trap filling programme is active.The trap filling programme ensures that the condensation trap isfilled after the appliance has been installed or after the appliancehas been out of use for a long period. For that reason, the appliance remains at minimum heating output for 15 minutes.Switching offySwitch off the appliance at the master switch (0).The green indicator lamp goes out. The optional timer will continue running until the emergency supply is exhausted.6 720 610 598 GB (01.07)13

Operating the Appliance3.3ySwitching on the Central HeatingTurn the central heating temperature controllevel:to the desired– “Min” setting: 35 C– Low-temperature heating: setting “E” (approx. 75 C)– “Max” setting: 88 CWhen the burner is lit, the red indicator lamp is illuminated.6 720 610 333-05.1OFig. 53.4Controlling Central HeatingySet room thermostat to the desired room temperature.ySet outside- temperature driven control unit, if fitted. Refer tothe instructions with the control.ySet the thermostatic radiator valves to the desired settings.146 720 610 598 GB (01.07)

Operating the Appliance3.5Setting the Hot Water TemperatureHot water temperatureThe hot water temperature can be set to between approx. 40 Cand 60 C using the temperature control.The domestic hot water temperature is not shown on the display.6 720 610 333-07.1OFig. 6Control SettingWater TemperatureAnti-clockwise limitapprox. 40 Clapprox. 55 CClockwise limitapprox. 60 CTable 2“ECO” buttonBy pressing and holding the “ECO” button, until the displaylights, you can switch between Comfort mode and Economymode.Comfort mode: button is not lit (factory setting)The appliance is held constantly at the set temperature. Thismeans that hot water is available almost instantaneously at thetap. Consequently the appliance will switch on at intervals, even ifno hot water is being drawn.6 720 610 598 GB (01.07)15

Operating the ApplianceECO mode with demand detection, button is litThe demand detection function enables maximum gas and watereconomy.Briefly turning a hot water tap on and then off again signalsdemand to the appliance which then heats up the water to the settemperature.Hot water is thus available in about 1 minute.ECO mode, button is litWater is not heated up until hot water is drawn. This means thatthere is a longer waiting period before hot water is available.3.6Summer Mode, Hot Water OnlyWith room thermostatyTurn temperature controlon the appliance anti-clockwiseas far as the stop.The central heating is now turned off. The hot water functionand the mains power supply for the heating programmer andtimer remain switched on.3.7yFrost protectionLeave master switch switched on.If the appliance is to be left for long periods switch the centralheating off:y16Add a suitable anti-freeze fluid to the water in the central heating system.Suitable products are available from Betz-Dearborn Tel.: 01514209563 and Fernox Tel.: 01799 550811.6 720 610 598 GB (01.07)

Operating the Appliance3.8Fault ConditionIn the unlikely event of a fault occuring while the appliance is inoperation:The display and the text display then shows a fault code and thebuttonmay also flash.If the buttonyPress and hold the buttonuntil the display shows “– –”.The appliance will then start up again and the display will showthe central heating flow temperature.If the buttonyflashes:does not flash:Switch the appliance off and then on again at the masterswitch.The appliance will start up again and the central heating flowtemperature will be displayed.If the fault remains and can not be cleared:yCall your approved installer or Greenstar Customer Service forassistance, giving a description of the fault and, if possible, thefault code from the facia display.6 720 610 598 GB (01.07)17

Text Display4Text Display4.1General Description The text display is used to display information about the appliance and the system and to alter the settings displayed. Once the appliance has been in operation for one day, the textdisplay module has a power buffer period of about 10 hoursduring which it will run without the mains power supply. Afterthat period has elapsed, the clock function shuts down but allother settings are retained.4.2ProgrammingabcC6 720 610 337-08.1RfFig. 7abcdefedControlsDisplay“Up”/“More” button“Down”/“Less” button“Back” button“Next” button“Delete” buttonThe standard display shows the following information: Time Room temperature (if TR 2 connected) CH flow temperature.186 720 610 598 GB (01.07)

Text DisplayAdditional indication if a special programme is active: x holidays Hot water immediately.Other special operating modes may be displayed during commissioning, servicing, etc.The programming procedure is described in detail below usingthe clock function as an example:yTo start programming, press any button, e. g.The display lighting switches on and the main menu is displayed:6 720 610 598-04.1OFig. 8Main menuyUse theorbutton to move the cursor arrow on theleft of the menu so that it points to the desired menu item.In this example, the cursor is positioned next to the menu itemSet time/day.yConfirm the selection by pressing theThe corresponding submenu is displayed:button.6 720 610 598-05.1OFig. 9Submenu: Set time/day6 720 610 598 GB (01.07)19

Text DisplayIn the submenus, the top line indicates what action is required.The bottom line shows the previous menu level, if applicable (seeFig. 10.yUse theorbutton to select Set time/day.yConfirm the selection by pressing theThe corresponding submenu is displayed:button.6 720 610 598-06.1OFig. 10Setting the hourWhen settings are being entered, the setting to be altered is indicated on the top line. In addition, the setting being altered is displayed with a dark background.yUse theorbutton to set the hour.– Press and release to change the display by one unit at a time– Press and hold to change the display rapidlyyConfirm the setting by pressing theyUse theyConfirm the setting by pressing theyUse theyPress thebutton to confirm the setting. The cursor thenreturns to the top line.ororbutton.button to set the minutes.button.button to set the day of the week.-oryPress thebutton to confirm the setting and return to theprevious menu (Fig. 9 page 19).-ory20Do not press any other buttons for 15 minutes.6 720 610 598 GB (01.07)

Text Display4.2.1Deleting a settingEither overwrite the setting or press the C button to delete it.yFind the setting to be deleted.yPress and release the C button.The display shows --:--4.2.2iyResetting all parameters to their original settings.The hours of service can not be reset to 0.Press and hold the C button for more than 15 seconds.After about 5 seconds, the following message appears on thedisplay:ATTENTIONDelete all parametersin x secondsOnce the reset has been completed, the following message isdisplayed:Please wait. Initialising6 720 610 598 GB (01.07)21

Text Display4.3Menu structureMainmenu1.2.3.Sethour/daySethour/day--- Hours- Minutes- Day of week23Holidays--Days holiday23HeatingHeatingprogram--- Day- 1st operating mode- 1st switching point.- 6th switching point24Set economy temp.--5.30 C25Hot waterprogram--- Day- 1st operating mode- 1st switching point.- 6th switching point26Hot waterimmediately--Off/On26Hot waterParameters g--Optimum Start onsLanguage-English/-Français/-Deutsch28-Time correction-LCD contrast2829Operatingtimes-29Faulthistory-29226 720 610 598 GB (01.07)

Text Display4.4Setting the time/day4.4.1Setting the time and dayFor details of how to set the time and day, refer to page 19.i4.4.2Changing winter and summer time:yOnly adjust the clock! Do not alter the switchingpoints (for heating, economy, etc.).HolidaysIn the Holiday programme, the central heating runs in Economymode and the hot water is switched off (frost protection functionremains active).yFrom the main menu, select Set time/day, and from the firstsubmenu select Holidays.yEnter the number of days holiday by pressingor(max. 99 days holiday).After the set number of days, the text display module automatically cancels Economy mode at midnight on the last day andreturns to Automatic mode.iThe day on which you enter the days holidaycounts as the first day of the holiday, i.e. the unitstarts the holiday program immediately. Only include the day on which you are returning if youdon’t want the heating to return to the normal program on that day!To cancel Holiday mode early:yIn the Holidays submenu:Press the C button until the display shows 0 .6 720 610 598 GB (01.07)23

Text Display4.5Heating4.5.1Heating programBasic setting (Automatic mode) The appliance switches automatically between normal heating,Economy mode and Frost protection mode according to thetimer settings entered. Heating mode ( “Day”): the text display module controls thesystem according to the temperature set for Heating mode(On (Comfort)) (Heating curve). Economy mode ( “Night”): the text display module controlsthe system according to the temperature set for Economymode (Off (Economy)) (Reduced-temperature heatingcurve). Basic setting:– Heating starts at 6:00 am– Economy starts at 10:00 pmSetting options Maximum of six switching points per day with three differentoperating modes (Heating, Economy, Frost protection). Same times for Monday to Friday. Same times for Saturday and Sunday. Different times for every day.Setting switching times and operating modeyFrom the main menu select Heating and then from the firstsubmenu, select Heating program.ySelect Monday - Friday, Saturday and Sunday or an individualday of the week.– Monday - Friday: to have “Heating” and “Economy” or“Frost protection” switching on at the same times everyweekday.246 720 610 598 GB (01.07)

Text Display– Saturday - Sunday: to have “Heating” and “Economy” or“Frost protection” switching on at the same times Saturdayand Sunday.– Individual day of the week (e. g. Thursday): to have the relevant program always switching on at the specified time onthat day of the week, i.e. “Heating”, “Economy” or “Frostprotection” at the same time every Thursday.yPressySet the desired first operating mode (Heating, Economy orFrost protection).yPressySet the desired first time period.yPress. Set the following operating modes and time periods as described for the first.yIf necessary: select the next day and enter the operatingmodes and timer periods as described above.i. The display shows Set 1. operating mode. The display shows Set 1. time period.If the settings for a particular day of the weekare different from the settings for the otherdays, then if Monday -Friday or Saturdayand Sunday is selected, the display shows--:--, i.e. there are no common switching pointsfor those options.Timer periods and operating modes are you do not wish tochange can be skipped by pressing.4.5.2Setting the Economy temperatureThis option allows you to set the room temperature for Economymode (Off (Economy)).This function is only active if: Automatic mode or Economy mode is set on the TR 2 roomthermostat.6 720 610 598 GB (01.07)25

Text DisplayyFrom the main menu, select Heating and then from the firstsubmenu, select Set Economy temp.yUse theorand 30 C.4.6button to set a temperature between 5Hot waterGeneral description The basic settings provide a straightforward timer programme:enabled from 5:00 am, disabled from 10:00 pm. The ECO button must not be lit (Comfort mode).4.6.1Hot water program Up to six switching points per day can be set. There are two operating modes: Blocked and Released.yFrom the main menu, select Hot water and then from the firstsubmenu, select Hot water program.ySet the days of the week, Blocked/Released (operating mode)in the same way as for the switching points and modes forheating as described on page water immediately Hot water immediately ON:– Comfort mode is active for 2 hours. Comfort mode is active for 2 hours: normal automatic program (Hot water mode according to timer programmeentered).yFrom the main menu, select Hot water and then from the firstsubmenu, select Hot water immediately.yPressoff.26orto switch Hot water immediately on or6 720 610 598 GB (01.07)

Text Display4.7yi InfoSelect Info from the main menu.You can view the following information:Display textDescriptionRoom temperature(if TR 2 connected)Current temperature in the roomwhere TR 2 is installedRequired room temperature (if TR 2 connected)Required temperature in room whereTR 2 is installedOperating mode(if TR 2 connected)E. g. Heating, Economy in AutomaticmodeorEconomy, Heating, Frost protection inmanual modeMax. flow temp.Maximum CH flow temperature set onthe temperature control for CH flowActual flow temp.Actual CH flow temperatureRequired flow temp.Required CH flow temperatureMax HW temp.Maximum permissible hot water outflow temperatureRequired HW temp.Required hot water temperatureActual HW temp.Actual hot water outflow temperatureBoiler operat. modewinter/ summerIndicates which mode the CH flowtemperature control is set toBurner on/offIndicates whether the burner is alightor notPump on/offIndicates whether the integral pump isswitched on or off6 720 610 598 GB (01.07)27

Text Display4.8Settings4.8.1Heating (TR 2)Optimum StartyFrom the main menu, select Settings and from the first submenu, select Heating.yPress4.8.2orto switch Optimum Start on or off.ServiceDisplaying service functionsThis option displays various current settings and statuses of theelectrically controlled appliance and system components for thebenefit of the heating engineer.Service parametersLanguageAvailable languages are: English, Français (French), Deutsch(German).yFrom the main menu, select Settings, from the first submenuselect Service, from the Second submenu select Furtheroptions, and from the third submenu select Language.yPressorto select the desired language.Two other supplementary functions can be selected from the thirdsubmenu Language: Time correction LCD contrast.286 720 610 598 GB (01.07)

Text DisplayTime correction:yPress and hold thebutton (about 5 seconds) until thedisplay shows Time correction and LCD contrast.yPressyPress theyPressorto select Time correction.button. The display shows Change value.orto set the number of seconds in 24 hours.Basic setting: “ 0 s”LCD contrast:yPress and hold thebutton (about 5 seconds) until thedisplay shows Time correction and LCD contrast.yPressyPress theyPressorto select LCD contrast.button. The display shows Change value.orto adjust the LCD contrast.Basic setting: e. g. “47”Operating timesThis option shows the hours of service (appliance, burner and hotwater) since commissioning.yFrom the main menu, select Settings, from the first submenuselect Service, from the Second submenu select Furtheroptions, and from the third submenu select Operatingtimes.Fault historyThis option displays any faults that have occurred for the information of the service engineer. The first fault displayed may still beactive. Any other faults displayed are no longer active.yFrom the main menu, select Settings, from the first submenuselect Service, from the Second submenu select Furtheroptions, and from the third submenu select Fault history.6 720 610 598 GB (01.07)29

Text Display4.9Individual timer programmesHeating periods for central heatingTimeOperating mode6.TimeOperating mode5.TimeOperating mode4.TimeOperating mode3.TimeOperating mode2.TimeStatus1.Operating modeSwitching undayEnable/disable hot water functionTimeOperating mode6.TimeOperating mode5.TimeOperating mode4.TimeOperating mode3.TimeOperating mode2.TimeStatus1.Operating modeSwitching unday306 720 610 598 GB (01.07)

Fault finding5Fault findingProblemCauseRemedyDesired room temperature is notreachedThermostaticvalve(s) set too lowIncrease thermostatic valve setting(s)Temperature controlfor CH fl ow set toolowIncrease CH fl owtemperature controlsettingAir trapped in heating systemBleed radiators andheating systemDesired room temperature exceededby large amountRadiators are toohotTurn down thermostatic valvesTemperature risesinsteadof fallingClock is incorrectlysetCheck settingRoom temperaturetoo high in Economy modeBuilding retains heatwellStart Economymode soonerNo display or displayunit does notrespondMomentary powerfailureSwitch off appliance at masterswitch, wait a fewseconds and switchon again6 720 610 598 GB (01.07)31

Tips on saving energy6Tips on saving energyHeating economicallyThe boiler is designed to provide a high level of comfort whilekeeping gas consumption and the resulting environmental effectas low as possible. The gas supply to the burner is controlledaccording to the level of demand for heat. The boiler continues tooperate with a low flame if the demand for heat reduces. The technical term for this process is modulating control. Modulating control keeps temperature fluctuations small and provides evendistribution of heat throughout the home. This means that theboiler may stay on for relatively long periods but will use less gasthan an appliance that continually switches on and off.Central heating systems with room thermostats/thermostatic radiator valvesThe central heating control on the boiler should be set to the maximum rated temperature of the central heating system or to position “E”, when the maximum central heating water temperatureobtained is 75 C.The temperature can be set individually in each room (except primary room with the room thermostat) using the thermostatic radiator valves. If you wish to have a lower temperature in the primaryroom than in the other rooms, leave the room thermostat at the settemperature and turn down the radiator using the radiator valve.Reduced-output operationConsiderable fuel savings can be made by slightly reducing theroom temperature. Lowering the temperature by 1 C can bringabout energy savings of up to 5 %. However, it is not advisable toallow the room temperature to fall below 15 C. The room temperature for reduced-output mode can be set separately on theroom thermostat. Instructions are given in the control unit operating instructions.326 720 610 598 GB (01.07)

Tips on saving energyHot waterA lowe

Greenstar HE plus combi Condensing boiler 6 720 610 598-00.1O ZWBR 7-28 HE plus GC-Number: 47 311 56 ZWBR 11-35 HE plus GC-Number: 47 311 57 6 720 610 598 GB (01.07) OSW. 2 Contents 6 720 610 598 GB (01.07) Contents Excellence c

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