- Worcester Bosch
Contents
1. gt Toswitchon the boiler turn on the water oil and electricity The radiator symbol will be displayed to confirm that the a supply to the boiler central heating setting is being changed Check the programmer timer is correct and is set to ON The value is displayed during this process press to gt Set the room thermostat to the desired setting exit or after five seconds of inactivity the boiler display will gt Open and set thermostatic radiator valves as required return to the default screen gt Turn the boiler water temperature control to the required setting 5 To switch off the boiler turn the programmer timer to OFF a for heating and hot water Ar 3 2 2 Setting central heating temperature gt Turn the central heating temperature control knob to the desired flow temperature between 50 and 82 C this will na sen be indicated on the digital display This is not the room temperature but the flow temperature through the Fig 2 radiators 6 Greenstar Heatslave II 6 720 813 721 2014 09 WORCESTER Bosch Group Using your boiler 3 2 3 Controlling central heating gt Set the programmer timer to the correct time with the required ON OFF periods gt Turn the room thermostat to the temperature required Set thermostatic radiator valves to the required temperature for each room Turning the central heating off during the summer gt Turn your2. Fig 4 Exit eco mode gt To exit Eco mode press and hold eco for at least four seconds Eco will disappear Greenstar Heatslave Il 6 720 813 721 2014 09 Using your boiler WORCESTER Bosch Group 3 2 7 Frost protection gt The boiler has built in frost protection to protect the boiler the boiler must have power for this to operate gt Ifyou are leaving the property unoccupied during cold weather please leave your programmer on constant and your room thermostat set to around 10 to 15 C gt Ifthe temperature within the boiler falls below 8 C the pump will run to circulate water and prevent the system freezing gt Ifthe temperature within the boiler falls below 4 5 C the boiler will fire immediately bringing the boiler temperature up to 12 C to avoid the possibility of the system freezing This process will be repeated until such time that the boiler temperature does not drop below 4 5 C 3 2 8 System pressure This boiler is fitted to a sealed heating system which is pre pressurised Your installer will advise you of the minimum and maximum pressure indicated on the pressure gauge Check regularly that the pressure is maintained 1 5 bar 6 720 805 211 06 1TL Fig 5 Optimum system pressure when your boiler is cold area A and the pumpis off The indicated pressure will change as the pump switches on for more accurate readings check pressure when the p
3. 2 5 Domestic hot water DHW 7 3 2 6 Ecomode 0 eee eee 7 3 2 7 Frostprotection 8 3 2 8 Systempressure 06 8 4 Maintenance ccccccees 9 41 Troubleshooting 9 4 2 Faultfinding 10 4 3 Maintaining your boiler 10 4 4 Servicing cece eee ee eee 10 5 General information 11 5 1 Ventilation information 11 5 2 General notes 11 6 Energysaving ceceeeeeee 12 6 1 Tips on energy saving 12 7 Guarantee cece eee eee 13 7 1 Fault or breakdown 13 7 2 Guarantee registration 14 7 3 Your guarantee 0005 14 Greenstar Heatslave Il 6 720 813 721 2014 09 WORCESTER Bosch Group Introduction 1 Introduction 1 1 Explanation of symbols Warning symbols Safety instructions in this document are framed and identified by a warning triangle which is printed on a grey Background A Key words indicate the seriousness of the hazard in terms of the consequences of not following the safety instructions NOTICE indicates possible damage to property or equipment but where there is no risk of personal injury CAUTION indicates possible personal injury WARNING indicates possible severe personal injury Important information Notes contain important information in cases where there i
4. Group 7 2 Guarantee registration You should complete and return the postpaid Guarantee Registration Card within 30 days of installation Returning your card will register you as the owner of your new boiler and will assist us in maintaining an effective and efficient customer service by establishing a reference and permanent record for your boiler This does not affect your statutory rights For your own records Model Serial number See identity label inside boiler casing Type size Date of installation Installer details 7 3 Your guarantee This boiler is guaranteed against faulty materials or workmanship from the date of installation subject to the following conditions During the period of this guarantee any components of the unit which are proved to be faulty or defective in manufacture will be exchanged or repaired free of material charges and free of labour charges if repaired directly by Bosch Thermotechnology Ltd The householder may be asked to prove when requested the date of installation that the boiler was correctly commissioned and where appropriate that the 12 month service inspection has been carried out to the satisfaction of Bosch Thermotechnology Ltd This should be documented in the Oil Boiler Commissioning Checklist and Service Interval Record in the back of the Installation Commissioning and Servicing manual Bosch Thermotechnology Ltd will not accep
5. is indicated by a flashing blue operation fault light and an triangular alert symbol on the display A flashing fault code is also displayed see figure 7 This type of fault can often be cleared by pressing the Reset button reset Fault codes 9F and 855 gt This is a burner lockout condition press the Reset button to restart the burner gt Ifthe burner fails to fire and fault 9F 855 is displayed again check the oil supply to the boiler gt Ifyou try more than five times to reset the boiler and fail no more resets can be attempted and the fault code 9F 856 will be displayed call Worcester Bosch Group for assistance quoting the fault codes contact details are on the back page Boiler reset 1 Press the Reset button pose on the fascia to clear the fault gt Resetandatick yf symbol will be briefly displayed gt Ifthe reset was successful the boiler will return to normal operation gt Ifthe reset was not successful then the fault code will be displayed again and the blue operation fault light will continue to flash Makea note of these fault codes in the table below as an example see figure 7 fault codes E5 and 218 Contact Worcester Bosch Group for assistance and quote any fault codes displayed 6 720 805 211 05 1TL Fig 7 Flashing fault code Three figure number e g E5 e g 218 Boiler stops with no fault code In most case
6. User Instructions Floor standing oil fired condensing boiler conventional flue and room sealed flue EENSTA LAVE I EP mains fed domestic hot water WORCESTER Bosch Group 6 720 813 721 2014 09 Contents WORCESTER Bosch Group User instructions amp customer care guide Please read these instructions carefully before operating your boiler These instructions are applicable to the Worcester Bosch Group boiler model s stated on the front cover of this manual only and must not be used with any other make or model of boiler The instructions apply in mainland UK only and should be followed except for any statutory obligation If you are in any doubt contact the Worcester Bosch Group technical support This boiler must be installed by a competent person e g an OFTEC registered engineer failure to install correctly could lead to prosecution Please leave this guide the installation instructions and the completed checklist with the user NOTICE A checklist and service interval AN record can be found at the rear of the Installation Commissioning and Servicing Instruction manual Abbreviations SEDBUK Seasonal Efficiency for Domestic Boilers in the United Kingdom Oil Firing Technical Association for the Petroleum Industry OFTEC Dedicated to heating comfort Thank you for purchasing a Greenstar oil fired condensing boiler from Worcester Bosch Group The company prides itself on manufactur
7. alve is fitted to all but one of the radiators or at least those in the sleeping accommodation The remaining radiator which must be where the room thermostat is located should be un controlled and must be left open Oil supply This appliance is for use with 28sec kerosene only Running the oil tank empty or low may result in damage to the burner Greenstar Heatslave Il 6 720 813 721 2014 09 11 Energy saving WORCESTER Bosch Group 6 Energy saving 6 1 Tips on energy saving Room thermostats Reducing the setting of the room thermostat by 1 C can reduce fuel consumption by up to 10 New control systems Upgrade your heating control system with the latest equipment available The minimum level of control for a heating system is a programmer interlocking room thermostat and thermostatic radiator valves Radiators More often than not radiators will be sited underneath a window so the warm air from the radiator heats the colder incoming air from the window The performance of the radiator will be affected if the curtains are allowed to drape over the radiator or shelves are fitted above it The positioning of furniture and tables in front of the radiator should also be avoided It is advisable to manually adjust all radiator valves every 2 3 months to prevent them from sticking It is also important that the plastic tops of all valves are always in position and not cracked or damaged to help prev
8. ent accidents Care should be taken when vacuum cleaning carpets to avoid damage to valves and pipework The heating system and the outputs of the radiators have been carefully selected by your installer The temperature obtainable in any given room is dependent on all radiators being operated at the same time If you decide to turn off radiators in unused rooms spare bedrooms etc you may experience slightly lower room temperatures in rooms adjacent to unheated rooms Heating economically The boiler is designed to provide a high level of comfort while keeping oil consumption and the resulting environmental effect as low as possible The central heating control on the boiler should be set as low as possible while still maintaining a comfortable room temperature The temperature of each room can be set individually using the thermostatic radiator valves except the primary room with the room thermostat Roof insulation Around 30 of the heat loss from a property is through the roof Replace any old insulation with new insulation preferably to a minimum thickness of 200mm Window frames Single glazed windows particularly those with steel frames can lose a great deal of heat Consideration should be given to replacement with PVCu or wooden framed double glazed units Curtains Lined curtains or heavier full length curtains can provide excellent insulation However always ensure that the curtains do not drape over radiator
9. ing boilers to the strictest quality control standards throughout every stage of production Worcester Bosch Group has led the field in innovative boiler design and performance for more than 50 years This heritage means all products are of exceptional quality and proven reliability The condensing range in particular is extremely energy efficient converting more of the fuel consumed into heat offering you economical running costs and value for money It sits in ErP heating efficiency band A at the top of the energy rated boilers available There is also the assurance of our no nonsense parts and labour guarantee backed up by an optional servicing and maintenance contract to keep your boiler operating at peak condition and efficiency To find out more about Worcester Bosch Group log onto www worcester bosch co uk Contents 1 Introduction c eee e eens 3 1 1 Explanation of symbols 3 1 2 Safety precautions 3 2 General Information 4 2 1 Energy efficiency 4 2 2 Servicing 6 ee eee eee eee ee eee 4 2 3 User caution 06 4 3 Using your boiler 0000 5 3 1 Controls ee 5 3 2 Operating the boiler 6 3 2 1 Switching the boiler on off 6 3 2 2 Setting central heating temperature 6 3 2 3 Controlling centralheating 7 3 2 4 Setting the hot water temperature 7 3
10. n boiler set too low Increase CH flow temperature control setting Air trapped in heating system Bleed radiators and recharge heating system Desired room temperature exceeded Radiators are too hot Turn down thermostatic radiator valves room by large amount stat Room temperature rises instead of Clock is incorrectly set Check setting falling No display or display unit does not Momentary power failure Switch off boiler at master switch wait 30 respond seconds then switch on again Hot water temperature too low Hot water temperature set too low Check setting Hot water not in timed period on the programmer Check programmer settings 4 3 Maintaining your boiler Your new boiler represents along term investment ina reliable high quality product In order to realise its maximum working life and to ensure it continues to operate at peak efficiency and performance it is essential that servicing and maintenance checks are performed at least once a year by an OFTEC engineer or other suitably qualified person If you would like to know more about servicing options from Worcester Bosch Group please visit worcester bosch co uk Please tick the appropriate box on your warranty registration card for further details of the Worcester Bosch Group Service Contract When your boiler requires servicing please contact a Worcester Bosch Group contact centre see inside front cover for details In addition
11. ormation Boiler location The boiler can be installed under a work top as long as The work top above the boiler is easily removable for maintenance gt There is at least 10mm clearance above the boiler The front of the boiler is not enclosed Ventilation Air vents must be functional at all times and the air supply must not be restricted or contaminated The boiler clearances must meet the minimum shown below for servicing and venting purposes If this clearance is less than 75mm the flue knock out panel sections must be removed to improve air circulation and cooling Do not place clothes or objects to hinder the air circulation required by the boiler Servicing clearances 1200mm vm 300mm gt 895mm 6 720 805 211 08 1TL Fig 8 Conventional flue boilers require an adequate supply of fresh air which must be delivered to the boiler for combustion purposes through a permanent inlet such as an air brick into the area where the boiler is situated Ifa cupboard or compartment which is to be used for storage or airing is built around the boiler after installation there must be a non combustible partition around the boiler Refer to the installation manual for minimum vent sizes 5 2 General notes To get the best from your boiler please read these instructions carefully Central heating systems During the first few hours of operation of the central heating system check
12. ower to the boiler 3 Allcontrol settings No boiler fault is found on over 30 of A all service call outs Please read the fault section of the manual before contacting our service team Worcester Bosch Group Cotswold Way Warndon Worcester WR4 9SW Tel 0330 123 9559 Worcester Bosch Group is a brand name of Bosch Thermotechnology Ltd worcester bosch co uk 6 720 813 721 2014 09 WORCESTER BOSCH GROUP TECHNICAL SUPPORT 0330 123 3366 APPOINTMENTS 0330 123 9339 SPARES 0330 123 9779 LITERATURE 0330 123 9119 TRAINING 0330 123 0166 SALES 0330 123 9669 ANNORCESTER Bosch Group
13. programmer timer to the off position Please refer to the programmer timer manufacturer s instructions 3 2 4 Setting the hot water temperature The hot water temperature control knob sets the temperature of the heat store A high setting will give a higher hot water temperature and greater quantities of hot water 1 Turnthe hot water temperature control knob to the desired level between 1 and 8 this will be shown on the digital display 2 The tap symbol will be displayed to confirm that the hot water setting is being changed 3 The value is displayed during this process press to exit or after five seconds of inactivity the boiler display will return to the default screen 6 720 805 211 03 1TL Fig 3 3 2 5 Domestic hot water DHW The GREENSTAR HEATSLAVE II is microprocessor controlled and at low DHW flow rates washing hands etc the burner will not fire up immediately when the tap is opened as the heat store will meet the demand but at high flow rates filling a bath for example the burner will fire up to boost the heat store and meet the demand If DHWis OFF on the programmer the appliance will still supply DHW using heat stored in the tank but it will not reheat the tank therefore the amount of water available is limited but is adequate for washing up filling basins etc We recommend that DHW is timed off overnight and when the home is unoccupied to save energy The timer sho
14. s Draughts Try to ensure that draughts around doors windows letter boxes and keyholes etc are reduced by using a suitable draught excluder WARNING A gt Do not block or seal any air vents that are installed to ensure the central heating boiler or other appliance operate safely 12 Greenstar Heatslave Il 6 720 813 721 2014 09 WORCESTER Bosch Group Guarantee 7 Guarantee 7 1 Fault or breakdown This boiler is supported in mainland UK by Worcester Bosch Group part of Bosch Thermotechnology Ltd Specialist trained Worcester Bosch Group Service Engineers are available to attend in the unlikely event that a breakdown occurs on this boiler No charge will be made for parts and or labour providing gt A boiler fault is found and the boiler has been installed within the guarantee period Reasonable evidence of this must be supplied on request Acall out charge will be made where gt The boiler has been installed for longer than the guarantee period or Our Field Service Engineer finds no fault with the boiler gt Note or gt Evidence cannot be provided that the first year service inspection has been carried out i e an entry in the service interval record found at the rear of the boiler installation and servicing manual or The cause of breakdown is misuse or with other parts of your plumbing heating system or with equipment not supplied by Bosch Thermo
15. s no risk of personal injury or material losses and are identified by the symbol shown on the left They are bordered by horizontal lines above and below the text i Additional symbols Symbol Meaning iL a numbered step in an action sequence gt a step in an action sequence alist entry a list entry second level 1 2 Safety precautions Oil fumes or leaks from the boiler Extinguish any naked flames Open windows and doors Switch off the boiler electricity supply Isolate the fuel supply to the boiler Contact installer service engineer This boiler must only be operated by a responsible adult who has been instructed in understands and is aware of the boiler s operating conditions and effects Health and safety The appliance contains no asbestos and no substances have been used in the construction process that contravene the COSHH Regulations Control of Substances Hazardous to Health Regulations 1988 Where applicable the CE mark indicates compliance with relative EU Directives Combustible and corrosive materials Do not store or use any combustible materials paper thinners paints etc inside or within the vicinity of the boiler The combustion air must be kept clear of chemically aggressive substances which can corrode the boiler and invalidate any warranty Fitting and modifications Fitting the boiler and any controls to the boiler may only be carried out by a compe
16. s these fault conditions will clear automatically when the associated fault clears e g waiting for an area of the boiler to cool down If the boiler fails to automatically reset itself after a period of 30mins call Worcester Bosch Group contact details are on the back page of this manual Greenstar Heatslave Il 6 720 813 721 2014 09 Maintenance WORCESTER Bosch Group 4 2 Fault finding Problem Cause Remedy Boiler stops working blue light and Internal error warning triangle flashing and fault code displayed Press the Reset button and the boiler should restart if not call Worcester Bosch Group quoting fault codes Boiler stops with no fault codes Possible overheat Wait 30 minutes for boiler to cool Boiler stops working blue light and Burner lockout warning triangle flashing and fault codes 9F 855 are displayed Press the Reset button to restart the burner If the burner fails to fire and fault 9F 855 is displayed again check the oil supply to the boiler Fault codes 9F 856 More than 5 attempts at a reset Call Worcester Bosch Group quoting fault codes during Burner lockout fault 9F 855 no more reset attempts can be made Desired room temperature is not reached too low Thermostatic radiator valve s set Increase thermostatic radiator valve setting s Room thermostat set too low Increase room thermostat setting Temperature control for CH flow o
17. t responsibility for damage caused by faulty installation neglect misuse or accidental damage and non observance of the instructions contained in the Installation and Users Instructions manuals The boiler has been used only for normal domestic purposes for which it was designed This guarantee applies only to equipment purchased and installed in mainland UK This guarantee is given in addition to all your normal statutory rights Worcester Bosch Group is a brand name of Bosch Thermotechnology Ltd Guarantee registration Your Greenstar appliance carries a guarantee against faulty material or manufacture subject to Terms and Conditions To read the full Terms and Conditions please visit us on line at www worcester bosch co uk guarantee The guarantee registration form is available on the same page and can be completed and submitted electronically Alternatively please telephone one of our Guarantee Registration advisors on 0330 123 2552 Your statutory rights are not affected by the manufacturer s guarantee i If the boiler fails to give complete satisfaction please make the general checks shown on the back page this manual before calling for a service engineer 14 Greenstar Heatslave II 6 720 813 721 2014 09 WORCESTER Bosch Group Notes Greenstar Heatslave Il 6 720 813 721 2014 09 15 General checks before calling a Service engineer 1 Oillevel in the tank 2 P
18. technology Ltd NOTICE No boiler fault is found on over 30 A of all service call outs Please read this guide carefully to gain a good understanding of the operation of your boiler In the case of a suspected fault refer to the fault finding section of this guide If in doubt contact our Technical Support In the event of an boiler fault or breakdown please contact our Service Department Your service administrator will arrange for an Engineer to call with the minimum of delay Under normal circumstances this will be from 1 to 3 working days excluding weekends for priority breakdown situations no hot water and or heating Invoices for attendance and repair work carried out on this boiler by any third party will not be accepted Boiler data label The data label can be found on the inside of the right hand side panel To access first remove the front panel gt Pull control panel drawer forwards gt Undo screws A securing the front panel to the boiler gt Lift panel off bottom ledge B and remove from appliance To replace the top panel gt Rest panel on bottom ledge B gt Replace the screws A securing the front panel to the boiler gt Push control panel drawer back into place You can record this information on the inside back cover of this manual DATA LABEL Fig 9 Greenstar Heatslave Il 6 720 813 721 2014 09 13 Guarantee WORCESTER Bosch
19. tent engineer in accordance with the relevant Installation Regulations Flue systems must not be modified in any way other than as described in the fitting instructions Any misuse or unauthorised modifications to the boiler flue or associated components and systems could invalidate the warranty The manufacturer accepts no liability arising from any such actions excluding statutory rights This boiler is suitable for use with Kerosene Class C2 only no other fuel may be used Do not operate the appliance when The appliance flue or system is incorrectly fitted faulty or damaged The flue terminal outlet is obstructed or damaged There are fumes fuel leaks or fuel smells from the fuel supply appliance or internal flue system The system is empty frozen or unpressurised The condensate pipe is blocked or restricted The appliance clearances are inadequate The air supply is restricted or vents damaged Greenstar Heatslave Il 6 720 813 721 2014 09 General Information WORCESTER Bosch Group 2 General Information 2 1 Energy efficiency Energy efficiency information is given in the Installation Commissioning and Servicing Instructions supplied with the appliance 2 2 Servicing The Service Checklist can be found at the rear of the boiler s installation instructions It will be required in the event of any guarantee work and may be required by the local Building Control Inspec
20. that all radiators are being heated at an even rate If the top of a radiator is at a lower temperature than the bottom then it should be vented by releasing air through the venting screw at the top of the radiator Ask your installer to show you how this is done Repeated venting will reduce the quantity of water in the system and this must be replenished for safe and satisfactory operation of the boiler When excessive venting or water leaks are found in the system you must contact a service engineer to inspect the installation and rectify any fault Only use additives compatible with the boiler and system Use of incompatible additives can cause damage and will invalidate the boiler guarantee Condensate drain This is a condensing boiler and the terminal will at times give out a plume of water vapour This is quite normal The boiler also produces quantities of condensate which is discharged regularly via a pipe to drain This pipe must not be blocked or altered in any way Clearances Service Your installer will have provided adequate space around the boiler for safety and servicing access Do not restrict this space with the addition of cupboards shelves etc next to the boiler Room thermostat Aroom temperature controller must be fitted to control the central heating Refer to instructions supplied with the thermostat for information on siting and setting Thermostatic radiator valves It is recommended that this type of v
21. to the service contract we are pleased to offer a one off annual service or breakdown call out for your boiler Maintenance tips Regularly check the oil level in the tank Running the tank empty or low can lead to damage to the burner Do not obstruct the flue outlet or the air inlet Use in hard water areas In exceptionally hard water areas a device to prevent scale formation may be fitted Installation of a scale inhibitor assembly should be in accordance with the requirements of the local water company An isolating valve should be fitted to allow for servicing 4 4 Servicing You must have the boiler regularly serviced by a competent qualified OFTEC registered engineer using approved spares to help maintain the economy safety and reliability of the boiler The boiler should be serviced once each year after installation unless the installation conditions and usage demand more frequent services The service engineer must complete the Service i Record in the checklist after each service The completed checklist will be required in the event of any warranty work and may be required by the local Building Control Inspector The checklist and service interval record can be found at the rear of the Installation Commissioning and Servicing Instructions 10 Greenstar Heatslave Il 6 720 813 721 2014 09 WORCESTER Bosch Group General information 5 General information 5 1 Ventilation inf
22. ton G OK Select confirmation button H Scroll down button I Demand fault indicator blue J Position for optional programmer K Hot water heat store temperature control L Diagnostic port service engineer M System pressure gauge N Burner service mode button service engineer Greenstar Heatslave Il 6 720 813 721 2014 09 Using your boiler WORCESTER Bosch Group Display symbols Screen display Description Explanation o A De eS TH KLA All possible screen symbols including greyed out symbols All possible screen symbols are displayed briefly during start up The greyed out symbols are not required for the operation of this appliance Numerical display Displays a temperature setting or boiler al Ven status code Wand Daal Vand Text display Displays ECO or Alert code Hot water Displays during a hot water demand and when the heat store is reheating Central heating Displays during central heating demand Alert Displays during a fault condition with diagnostic and status code Service mode Displays when in the service menus C Centigrade indication Displays next to temperature reading Confirmation Confirms a manual change Weather Compensation Displays only if Weather Compensation sensor is fitted and is active 3 2 Operating the boiler 3 2 1 Switching the boiler on off
23. tor gt Have the boiler serviced regularly by a competent OFTEC registered engineer gt Ensure that the service engineer completes the Service Record at the rear of the Installation Commissioning and Servicing Instruction manual after each service Have any work carried out only by a competent OFTEC registered engineer gt Always use original spares to help maintain the efficiency safety and reliability of the appliance 2 3 User caution tis forbidden for any interference with the appliance other than those actions allowed in this document CAUTION Incorrect use AN gt Any incorrect use can result in danger to the householder Greenstar Heatslave Il 6 720 813 721 2014 09 WORCESTER Bosch Group Using your boiler 3 Using your boiler 3 1 Controls ABC D E FGH IJ K L M He i i ieee ier i i M i i Hee At eet i FE 0 pA p ve E i i Me i 1 i 1 i 1 1 t 1 1 1 k 1 1 i 1 1 1 i 1 1 1 i 1 i 1 1 i 1 1 i i T PG i i MEET He i r pe jg i i id H ee oer t i Sr Vor en mm i t E mE y i yu NI EEE Iie 6 720 805 211 01 1TL Fig 1 A Spanner return button B Reset button C ECO button D Boiler LCD display E Central heating temperature control F Scroll up but
24. uld be set for at least half an hour before normal hot water demands are expected to reheat the heat store When reheating the heat store the controls will reclaim heat from the boiler for the tank this means that the pump will run and the blue light will be on for some time after the burner has turned off whilst heat reclaiming takes place WARNING Care should be taken when using slow running taps and showers as in some circumstances the combination of low water flow rate and high setting of the hot water control thermostat can result in very hot water 3 2 6 Ecomode Domestic hot water eco mode Eco mode is an energy saving feature which alters the cycling function of the burner for heating the heat store tank In normal operation the burner will fire more frequently between demands in order to maintain a stored temperature close to the hot water set point you have entered In Eco mode the burner fires less frequently between demands meaning that the heat store temperature is maintained at a lower average level but the tank set point remains the same By selecting Eco mode you will be using less energy as the tank is allowed to cool a little more before reheating to the set point Selecting Eco mode 1 Press and hold eco for at least four seconds to enter the energy saving Eco mode when Eco mode is active Eco will be displayed 6 720 805 211 04 1TL
25. ump is not running gt Contact your installer or maintenance engineer if a permanent significant decrease or increase in pressure is indicated on the pressure gauge Filling loop If the sealed system pressure within your system drops to below 0 5 bar shown on the pressure gauge you will need to increase the pressure to ensure your boiler continues to run without problems Your installer should have informed you where to find the filling system and instructed you in its use i Once the external filling loop has been located follow the instructions for re pressurising the system 1 Unscrew blanking cap 2 Attach the hose to the valves screw on hand tight 3 Turn the handle screwdriver slot through 90 to open valves 4 The handle screwdriver slot will be in line with the valves 5 When the pressure reaches between the 1 and 1 5 bar marks zone A turn the handles screwdriver slots back through 90 to close the valves 6 The handle screwdriver slot will be at 90 to the valves 7 Remove the hose and replace the blanking caps Max 6 720 805 211 06 1TL Fig 6 Greenstar Heatslave Il 6 720 813 721 2014 09 WORCESTER Bosch Group Maintenance 4 Maintenance 4 1 Troubleshooting Boiler alert state Should a fault develop with this boiler or the system the boiler will enter into a fault condition 1 A fault condition
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