User manual ecoTEC user instructions 2006 Size 3.09 MB
Contents
1. Fig 4 8 Switching on the appliance example ecoTEC plus e Use the main ON OFF control 1 to switch the appli ance on I ON O OFF When you switch on the appliance the current operating status appears in the display 2 To adjust the appliance according to your requirements read sections 4 5 and 4 6 which describe the setting options for hot water supply and heating A Caution gt Risk of damage The boiler frost protection and monitoring sys tems are only active when the main ON OFF control of the appliance is in the I position and it is not disconnected from the main power supply Instructions for use ecoTEC 4 5 Domestic hot water with ecoTEC combination boilers The boiler must only be used when the heating system contains water see 4 3 2 4 514 Setting the water temperature aT pro 45 2 ma Ox o o Fig 4 9 Setting the water temperature e Switch on the appliance as described in section 4 4 The domestic hot water temperature can be adjusted using the hot water temperature control 3 e Turn the control clockwise to increase the temperature and anti clockwise to decrease the temperature This corresponds to left limit approx right limit max 35 C 65 C Cr Note This control adjusts the maximum domestic hot water temperature If adjusting the control upwards appears to have no effect on the tem pera2. 4 2 Packaging Please leave the disposal of the transport packaging to the expert company which installed the appliance Cr Note Please observe the applicable national legal regulations 4 Operation 4 1 Overview of controls on ecoTEC plus Fig 4 1 ecoTEC plus controls For access to the controls open the front flap by pulling at the centre of the case strip 1 Display indicating the current heating flow tempera ture the pressure in the heating system the operat ing mode or additional information The i information button Built in control timer if fitted Pressure gauge displaying the pressure in the heat ing system Main ON OFF control button for moving forward in the display button for moving back in the display or for dis playing the pressure in the heating system Reset button Maximum radiator temperature control 10 Maximum hot water temperature control and warm start ON OFF control ecoTEC plus combination boil ers only sou AUN o Advanced multifunctional display system Fig 4 2 Display on ecoTEC plus The ecoTEC plus appliance is fitted with a digital infor mation and analysis system This system provides infor mation on the operating status of your appliance During normal operation the display 1 shows the cur rent heating flow temperature in this example 45 C In the event of a fault an error code app
3. are unable to contact your installer phone Vaillant Service Solutions 0870 6060 777 3 2 Intended use Vaillant ecoTEC boilers are state of the art appliances which have been constructed in accordance with recog nised safety regulations Nevertheless there is a risk of injury or death to the user or others and damage to the appliance or other property in the event of misuse or use for which the appliance is not intended The appliances are designed to generate heat for con nected hot water central heating systems Any other use is considered to be use other than intended The manufacturer supplier is not liable for any resulting damage The user alone bears the risk Intended use includes the observance of the operating and installation manual and all other applicable docu ments as well as adherence to the maintenance and inspection conditions Caution Any incorrect use is forbidden A Instructions for use ecoTEC 3 3 Care e Clean the exterior your appliance with a damp cloth and a little soap Cp Note Do not use scouring or cleaning agent which might damage the housing or plastic fittings 3 4 Recycling and disposal Both your Vaillant ecoTEC boiler and its packaging con sist mainly of recyclable raw materials 3 41 The appliance Do not dispose of your Vaillant ecoTEC boiler or any of its accessories with household waste Make sure the old appliance and any existing accessories are disposed of properly 3
4. cycling mode after heating operation S 30 Room thermostat 3 4 no heating demand S 31 Summer mode active S 34 Frost protection mode Displays in hot water operation ecoTEC combinati on boilers only S10 Hot water demand S14 Burner ignited Displays for hot holding operation ecoTEC combination boilers only S 20 Hot holding request S 24 Hot burner holding operation on Displays in cylinder charging mode ecoTEC system boilers only S 20 Cylinder charging request S 24 Cylinder charging burner on Table 4 1 Status codes selection a complete set of status codes can be found in the installation and servicing manual 4 8 Troubleshooting In the unlikely event that a problem occurs with the ope ration of the ecoTEC boiler the following points should be checked Boiler fails to operate Is the gas supply turned on see 4 3 1 Is the water supply turned on ecoTEC combination boilers only see 4 3 1 Is there enough water in the heating system see 4 3 2 Is the electrical supply switched ON Is the main ON OFF control in the ON position switch position I see 4 4 Is there an ignition problem see 4 8 2 Hot water operates but no central heating ecoTEC combination boilers only Is the heating turned ON see 4 6 1 Are all external heating controls ON see 4 6 3 A Caution Inappropriate modifications can cause damage If your boiler still does not operate then please consul
5. temperature again e g setting b ecoTEC pro Fig 4 11 Switching the warmstart system on and off with eco TEC pro e Activate the warmstart system by briefly turning the knob 1 all the way clockwise position a The green LED 2 lights up Then select the required temperature e g setting b see 4 511 The water is kept at a constant temperature of 55 C and is available immediately as you turn on a tap e Switch off the warmstart system by briefly turning the knob 1 all the way anti clockwise position c The green LED 2 goes out Then select the required hot water outlet temperature again e g setting b 4 5 3 Drawing hot water ecoTEC combination boilers only BR a Fig 4 12 Drawing off hot water example ecoTEC plus On opening a hot water tap 1 at a supply point basin shower bath etc the ecoTEC combination boiler will automatically operate to deliver hot water On closing the tap the boiler switches OFF or continues to operate for central heating if required Instructions for use ecoTEC 4 6 Heating operation The boiler must only be used when the heating system contains water see 4 3 2 4 6 1 Setting the maximum radiator temperature control 070 Fig 4 13 Setting the maximum radiator temperature control Set the maximum radiator temperature control to the desired setting using the
6. ashing There is either a demand for hot water or warmstart 3 Yellow indicator Illuminated Main burner ignited 4 Red indicator Illuminated Boiler is at lock out and will display fault code amp As long as this symbol appears in the display a heating flow temperature and hot water outlet temperature is set by the vrnetDIALOG accesso ry which means the appliance uses temperatu res other than those set using the controls 10 and 11 This condition can only be ended using vrnetDIALOG or by a change in temperature at controllers 10 or 11 of more than 5K This condition cannot be ended with the Reset button 9 or by turning the appliance off or on 4 3 Initial checks before turning on 4 31 Opening the service valves C7 Note If a bottom cover is fitted to the boiler the ser vice valves are behind this cover Fig 4 5 Opening the service valves on ecoTEC plus combina tion boilers Fig 4 6 Opening the service valves on ecoTEC system boilers Ensure that the service valves in the heating flow and return 4 and 1 and the gas service valve 3 are open The flow return and gas service valves are open when the screwdriver slot is in the same direction as the pipework On ecoTEC combination boilers only Ensure the cold water service valve 2 is open This can be checked by opening a hot water tap and ensu ring water flows A Caution The pressure relief valve is provi
7. commissioning engineer If after reading these instructions you have any ques tions on the operation of the boiler please contact either your installer or Vaillant Technical Department 11 Storage of the documents Please store this user manual and all related documents so that they are available whenever they are required If you move please pass on the documents to the buyer 1 2 Symbols used in this manual Please observe the safety instructions in this operating manual for the operation of the appliance A Danger Immediate risk of serious injury or death A Caution Potentially dangerous situations for the prod uct and environment C Note Useful information and instructions e Symbol for a necessary task 1 3 CE marking The purpose of CE marking is to certify that the boiler complies with the requirements of the directives covering gasfired appliances Council directive 90 396 EEC and electromagnetic compatibility Council directi ve 89 336 EEC Instructions for use ecoTEC These appliances also comply with the requirements of the directive on operating efficiency Council directive 92 42 EEC L EN benchmarf The mark of quality for domestic heating tr Vaillant Ltd support the Benchmark initiative At the rear of the installation manual you will find a Benchmark gas boiler commissioning checklist It is very important that this is com pleted correctly at the time of installat
8. control knob 1 We recommend the following settings Left setting during spring and autumn Middle setting during mild winter Right setting during cold winter When you adjust the temperature the set value is shown in the display 2 After five seconds the display returns to standard mode the current heating flow tempera ture Normally you can adjust the knob 1 continuously up to a flow temperature of 75 C However higher tempera tures can be set on your appliance have your engineer make adjustments so that you can operate the heating system at higher flow temperatures Instructions for use ecoTEC 4 6 2 Switching off heating summer operation Fig 4 14 Switching off heating summer operation You can switch off the heating in summer without switching off the hot water supply Turn the knob 1 for setting the maximum radiator temperature all the way to the left 4 6 3 Setting a room or outside temperature con troller Fig 4 15 Setting a room or outside temperature controller Set the room thermostat 1 and or the thermostatic radiator valves 2 according to the instructions sup plied with the control s Cr Note Vaillant offer room thermostat time control accessories which give accurate and economic room temperature control as well as improved comfort 1 The boiler will now operate automatically to provide cen tral heati
9. ded for safety reasons and must not be interfered with 4 3 2 Checking the system pressure plus ra my Ox Fig 4 7 Checking the filling pressure of the heating system e Check the water pressure of the system using the pressure gauge 1 before putting the boiler into oper ation For the heating system to operate properly the indicator on the pressure gauge must be in the dark grey zone when the system is cold This is a filling pressure between 1 0 and 2 0 bar If the indicator is in the light grey area below 0 8 bar fill the system up with water before putting the boiler into operation Cr Note The ecoTEC appliance has a pressure gauge and a digital pressure display The pressure gauge allows you to quickly check whether the filling pressure is in the correct range even when the appliance is switched off When the appliance is in operation you can see the exact pressure in the display Activate the pressure display by pressing the button 2 After 5 seconds the display returns to the flow temperature Instructions for use ecoTEC Cr Note Your appliance has a pressure sensor If the pressure falls below 0 6 bar the pressure flashes in the display If it falls below 0 3 bar the appliance switches off The error message F 22 appears in the dis play The system must be filled with water before you start up the appliance again 4 4 Turning the boiler ON
10. ears instead of the temperature The display also gives the following information 1 Indication of the current heating system flow temperature or water pressure in the heating system or display of a status or error code Fan speed malfunction Fan speed malfunction CR As long as this symbol appears in the display a heating flow temperature and hot water outlet temperature is set by the vrnetDIALOG accesso ry which means the appliance uses temperatu res other than those set using the controls 9 and 10 This condition can only be ended using vrnetDIALOG or by a change in temperature at controllers 9 or 10 of more than 5K This condition cannot be ended with the Reset button 8 or by turning the appliance off or on ml Heating mode active Illuminated Heating mode Flashing Anti cycling mode active Instructions for use ecoTEC Hot water supply active ecoTEC plus combination boilers only Illuminated Hot water demand ecoTEC system boilers only Illuminated Heating of an indirect hot water cylinder turned on Flashing Heating demand from the hot water cylinder burner on Warmstart system active ecoTEC plus combination boilers only Illuminated Warmstart turned on Flashing Warmstart demand burner on N Internal pump is running Gas valve is activated CO Flame with cross Boiler is at lock out and will display fault code Von z Flame without cross Normal bu
11. eee Vaillant Instructions for use ecoTEC Vaillant Wall hung room sealed fan assisted condensing boilers ecoTEC plus 612 ecoTEC plus 615 ecoTEC plus 618 ecoTEC plus 624 ecoTEC plus 630 ecoTEC plus 637 ecoTEC plus 824 ecoTEC plus 831 ecoTEC plus 837 ecoTEC pro 24 ecoTEC pro 28 6666 6 GB Contents Appliance characteristics Appliance characteristics 2 The Vaillant ecoTEC plus and ecoTEC pro models are compact wall mounted condensing appliances 1 Notes on these instructions 3 ecoTEC plus and pro combination boilers provides both 11 Storage of the documents 3 central heating and domestic hot water with the dome 1 2 Symbols used in this manual 3 stic hot water supplied directly from the boiler The boi 1 3 CE marking sce hoe ete ene eek Po Rae ag sca 3 ler will operate automatically to provide domestic hot 1 4 Data badge rh ose wea ei aa ee tees 3 water whenever a hot water tap is opened and auto matically adjusts to meet the demand for both central 2 Safety 5 108088 wie ago E ES 3 heating and domestic hot water in the most economical 21 Setup and adjustments 3 way 2 2 What to do in an emergency 3 ecoTEC system boilers provides central heating and 2 3 Safety instructions 4 domestic hot water where a separate indirect hot water 2 4 Modifications in and around the boiler 4 cylinde
12. h as petrol or paint in the same room as the appliance Danger Risk of poisoning and explosion due to a mal function Never put the safety devices out of operation or tamper with them so as to impair their func tion 2 4 Modifications in and around the boiler No modifications may be made to the following items The boiler The gas water and electrical supply The flue system The safety valve for the heating water Any structural changes around the appliance that could affect the operational safety of the boiler Caution Inappropriate modifications can cause damage Never tamper with the boiler or other parts of the system Never attempt to perform maintenance or repairs yourself A Do not damage or remove seals on components Only authorised engineers or our customer service may removed sealed components Danger Risk of scalding The water coming out of the tap can be very hot ecoTEC combination boiler only Caution Risk of damage Do not use sprays solvents chlorinated clean ing agents paint adhesives or similar sub stances in the vicinity of the appliance These substances can cause corrosion including in the flue system A Installation and setting A Important The appliance must be installed and serviced by a Competent Person as stated in the Gas Safety Installation and Use Regulations 1998 In IE the installation must be in accordance with the current edition
13. ion commissioning and handover to the user 1 4 Data badge The type plate of the Vaillant ecoTEC is attached at the factory to the bottom of the appliance 2 Safety 24 Setup and adjustments Installation and adjustment of the boiler as well as serv ice maintenance and repair of the boiler may only be carried out by a competent person in accordance with the Gas Safety Installation and Use Regulations 1998 In the U K CORGI Registered installers undertake the work to a Safe and satisfactory standard If the boiler is installed in a compartment do not obstruct any purpose provided ventilation openings and do not use the com partment for storage purposes 2 2 What to do in an emergency A Danger 53 Smell of gas Risk of poisoning and explosion due to a malfunction If you smell gas or suspect a gas leak Do not switch lights on or off Do not use any other electrical switches Do not use a telephone in the hazardous area Do not use naked flames such as matches or cigarette lighters Do not smoke Turn off the gas supply at the gas meter Open the windows and doors Warn other residents Get out of the house Consult your gas supplier service agent or other com petent person 2 3 Safety instructions Always observe the following safety instructions and regulations Danger Inflammable mixtures of gas and air may explode Do not use or store explosive or easily flamma ble substances suc
14. ith the main ON OFF control turned on the appliance starts up and heats the boiler to 30 C A Caution Parts of the system may freeze The frost protection function cannot guarantee that water flows through the entire heating sys tem 4 11 Maintenance and customer service Inspection and maintenance Permanent operational readiness reliability and a long service life require inspections and maintenance work to be regularly carried out by a heating engineer or Vaillant For further details please contact Vaillant Service Solutions 0870 6060777 Danger Risk of injury and damage due to improper handling Never attempt to perform maintenance or repairs on the appliance yourself Have a specialist heating company do the work We recommend signing a service agreement The reliability of the appliance can be impaired resulting in damage to property or personal injury if maintenance work is not carried out Regular servicing ensures maximum efficiency and eco nomical operation of your gas wall heater Instructions for use ecoTEC DHA LHA Ze Vaillant Ltd Vaillant House a Medway City Estate a Trident Close a Rochester Telephone 01634 292300 1 Fax 01634 290166 a www vaillant co uk Kent ME2 4EZ info vaillant co uk 838402_04GB 08 2006
15. n in the gas or electricity supply or faults in the flue gas system To overcome this possibility you can drain both the central heating system and boiler C Note Frost protection and monitoring devices can only function when the main switch of the unit is set to the I position and the boiler is con nected to the electrical supply Instructions for use ecoTEC 3 Instructions on operation 3 1 Factory guarantee 3 11 Two 2 year guarantee for ecoTEC plus appli ances Vaillant undertakes to rectify any manufacturing defect that occurs within twenty four months of the installation date For the 2nd year of the guarantee to be valid an annual service must be carried out by a CORGI registered instal ler one year after installation The cost of this annual service is not included in the guarantee 3 1 2 One year guarantee for ecoTEC pro appliances Vaillant undertakes to rectify any manufacturing defect that occurs within twelve months of the installation date 3 1 3 Registering with us Registration is simple Just complete the Guarantee Registration Card and return to Vaillant within 30 days of installation Your details will then be automatically registered within the Vaillant scheme Cp Note No receipt will be issued 3 1 4 Immediate help If your Vaillant boiler develops a fault your first action should be to contact your installer as his professional assessment is needed under the terms of our Guarantee If you
16. ng for the conditions selected on the external controls ecoTEC combination boilers will also provide domestic hot water on demand After the boiler stops operating the pump will continue to operate for a short period to fully disperse the heat from the boiler Cr Note The boiler incorporates an anti cycling econo miser control to prevent energy wasteful ON and OFF operation of the boiler for short peri ods when in the central heating mode When turning the room thermostat to a higher setting there may therefore be a short delay before the boiler operates 4 7 Status displays plus pro 5 4 my Ox Fig 4 16 Status displays The status displays provide information on the operating status of the appliance e Press the i button 1 to activate the status displays The display 2 then shows the current status code for example S 4 for burner operation The table below explains the most important status codes In switching phases for example on starting up again after the flame was extinguished the status message S briefly appears e Press the i button 1 again to switch the display back to normal mode Display Meaning Displays during heating operation S O No heat required S 1 Pump running S 3 Ignition sequence heating operation S 4 Burner ignited S 6 Fan and pump overrun S 7 Pump overrun S 8 Anti
17. ntrole vise seas spas Sed cea eee es 11 4 7 Status displays 12 4 8 Troubleshooting 12 4 81 Problems due to low system water pressure 13 4 8 2 Ignition problems 13 4 8 3 Flue problems 13 49 Turning off the boiler 13 410 Frost protection 14 411 Maintenance and customer service 14 Instructions for use 17 2 Instructions for use ecoTEC 1 Notes on these instructions To ensure clarity of information in instructions a new European standard of advice and symbols is being intro duced To ensure compliance with this new standard the following details are included The following information is intended to help you throughout the boilers entire instruction pack We assume no liability for any damage caused by non observance of these instructions Other instruction supplied with this appliance For the end user Short operating instructions ecoTEC plus only no 838404 Warranty card with return envelope no 802922 For the installer service engineer Instructions for installation and servicing no 839592 Flue installation instructions no 835296 The instructions for any accessories and controllers used also apply The Benchmark gas boiler commissioning checklist in the installation manual should be completed by the installer and or the
18. of 1 S 813 Domestic Gas Instal lations the current Building Regulations and reference should be made to the current ETCI rules for electrical installation Caution The appliance may only be operated with its case properly and permanently closed Otherwise in unfavourable conditions material damage or even injury or death can result A Filling pressure of the heating system Regularly check the filling pressure of the heating sys tem see 4 3 2 Leaks ecoTEC combination boiler only If there is a leak in the water pipes between the appli ance and the taps immediately turn off the cold water service valve and have your engineer repair the leak Frost protection Your boiler is equipped with a frost protection function If the heating water temperature drops below 5 C when the main switch is ON then the boiler goes into operati on and heats the boiler circuit to approx 30 C Cc Note It cannot be guaranteed that water will circula te throughout the entire heating system If the boiler is not operated for several hours during very cold weather there is therefore the possibility of the system freezing Please ensure that if you are absent during a period of frost the central heating remains in operation and all rooms are kept above freezing point It must be remembered however that the boiler will be automatically switched off by the built in monitoring devices if certain faults occur e g interruptio
19. ons please remember to quote the fault code as this will help to pinpoint the fault Instructions for use ecoTEC 4 9 Turning off the boiler Fig 4 18 Switching off the appliance Turn the main ON OFF control 1 to the O position A Caution The boiler frost protection and monitoring sys tems are only active when the main ON OFF control of the appliance is in the I position and it is not disconnected from the main power supply To ensure that these protection devices remain active switch your boiler on and off using the external control ler cp Note If the appliance is switched off for a long time for example when you are on holiday you should also turn off the gas supply the cold water service valve and the electrical supply Note Do not turn the ecoTEC system boilers OFF if a hot water cylinder is also incorporated in the system unless there is no demand for domestic hot water 410 Frost protection The frost protection feature only protects the boiler Any other parts of the system liable to frost damage should be protected accordingly A Caution The frost protection and monitoring systems are only active when the main ON OFF control of the appliance is in the I position and it is not disconnected from the main power supply Frost protection function The boiler has a frost protection function If the heating flow temperature falls below 5 C w
20. r is also incorporated to the system 3 Instructions on operation 5 31 Factory guarantee 5 311 Two 2 year guarantee for ecoTEC plus appliances 5 31 2 One year guarantee for ecoTEC pro appliances 5 31 3 Registering with us 5 31 4 Immediate help 5 3 2 Intended USE cser hassan rit 5 B S CAE ones hotel nn home sommelier Ait 5 3 4 Recycling and disposal 5 3 41 The appliance 5 34 2 Packaging ie eyo ered hae oe DA ee re 5 4 Operation scs sis eese esse tas 6 41 Overview of controls on ecoTEC plus 6 4 2 Overview of controls on ecoTEC pro 7 4 3 Initial checks before turning on 8 4 31 Opening the service valves 8 4 3 2 Checking the system pressure 8 4 4 Turning the boiler ON 9 4 5 Domestic hot water with ecoTEC combination poileas A iit h poaae tn bee eue 9 4 51 Setting the water temperature 9 4 5 2 Switching the warmstart function on and off 10 4 5 3 Drawing hot water ecoTEC combination boilers ONY sheen eee Sethe eas 10 4 6 Heating operation 11 4 61 Setting the maximum radiator temperature COMTO leatn demon sut sets 11 4 6 2 Switching off heating summer operation 11 4 6 3 Setting a room or outside temperature co
21. rner operation 4 2 Overview of controls on ecoTEC pro 11 10 3 I D lt 5 9 6 8 7 Fig 4 3 ecoTEC pro controls 1 Display indicating the current heating flow tempera ture the pressure in the heating system or additional information 2 Indicator lights to display the current operating mode 3 The i information button 4 Built in control timer if fitted 5 Pressure gauge displaying the pressure in the heat ing system 6 Main ON OFF control 7 button for moving forward in the display 8 button for moving back in the display or for dis playing the pressure in the heating system 9 Reset button Instructions for use ecoTEC 10 Maximum radiator temperature control 11 Maximum hot water temperature control and warm start ON OFF Multifunctional display system ecoTEC pro boiler has a multifunction display 1 When the main ON OFF control is in the ON position the dis play will normally show the system CH flow temperature of water in the boiler circuit 45 C in the example which confirms that the boiler is functioning correctly Fig 4 4 ecoTEC pro indicator lights 1 Display indicating flow temperature or the system pressure or the relevent fault code 2 Green warmstart indicator Illuminated Warmstart switched ON Not illuminated Warmstart is switched OFF and there is no demand for hot water Fl
22. t your installer or Vaillant Service Solutions 0870 6060 777 Instructions for use ecoTEC 4 81 Problems due to low system water pressure The device switches to Fault if the water pressure in the heating system is too low This malfunction is indi cated by the fault code F 22 dry fire or F 23 or F 24 lack of water You can only start up the appliance again when the heating system is sufficiently filled with water 4 8 2 Ignition problems plus pro WF 0 Fig 4 17 Troubleshooting If the burner fails to ignite after five attempts the device does not start up and switches to Fault This is indicated by the fault code F 28 or F 29 in the dis play On ecoTEC plus appliances the display also shows the flame symbol with a cross through it 1 On ecoTEC pro appliances the red LED 2 also lights up Automatic ignition can only take place after you manual ly reset the fault e To reset the fault press the reset button 3 and hold it down for one second Caution If the boiler still shuts off after three attempts of resetting please consult your installer or Vaillant Service Solutions A 4 8 3 Flue problems The appliances are fitted with a fan If the fan does not work properly the appliance will switch itself off The display shows the symbols and and the fault message F 32 Cr Note If contacting Vaillant Service Soluti
23. ture then the boiler is already operating at full output for the selected flow rate When you adjust the required temperature the set value is shown in the display 2 After five seconds the display returns to standard mode the current heating flow temperature A Caution If you live in a hard water area please do not set the control knob 3 above the mid 12 o clock position to prevent excessive scale for mation 4 5 2 Switching the warmstart function on and off The warmstart system of the ecoTEC combination boi lers provides you with hot water at the required tempe rature immediately To do this the hot water heat exchanger of the ecoTEC is kept at a pre selected tem perature level and the boiler will therefore periodically operate to maintain this temperature ecoTEC plus Fig 4 10 Switching the warmstart system on and off with ecoTEC plus e Activate the warmstart system by briefly turning the knob 1 all the way clockwise position a Then select the desired hot water outlet temperature again e g setting b refer to Section 4 5 1 The appli ance automatically adapts the hot holding temperature to the set hot water temperature The tempered water is directly available at the taps the symbol C flashes in the display e Switch off the warmstart system by briefly turning the knob 1 all the way anti clockwise position The symbol C disappears Then select the required hot water outlet
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