Vaillant ecoTEC sustain 24 Installation And Maintenance Instructions Manual

Also see for ecoTEC sustain 24: Operating instructions Installation and maintenance instructions

7 Start-up18 Installation and maintenance instructions ecoTEC sustain 0020253094_01◁ The heating water temperature and the filling pres-sure for the heating installation are shown altern-ately in the display.6. Press to return to the check programme.◁ The display shows the check programme.7. Press to exit the check programme.◁ OFF is shown in the display.◁ The display changes to show the check pro-grammes.8. Press the button 2 times to exit the checkprogramme.◁ The End message appears in the display.◁ The display switches to the basic display.7 Start-up7.1 Carrying out the initial start-upInitial start-up must be carried out by a customer servicetechnician or an authorised competent person using the first-commissioning-checklist. The first-commissioning-checklistin the appendix (→ Page 46) of the installation instructionsmust be filled in and stored carefully along with the unit'sdocumentation.▶ Carry out the initial start-up using the first-commission-ing-checklist in the appendix.▶ Fill out and sign the first-commissioning-checklist.7.2 Gas type checkMake sure that the product is set up correctly by checkingthe type of gas. This ensures optimum combustion quality.▶ Check the type of gas as part of routine product mainten-ance work when replacing components, carrying out workon the gas route and carrying out a gas conversion.7.3 Checking the factory settingThe product combustion is checked on-site and pre-set tothe type of gas specified on the identification plate.▶ Check the information about the type of gas indicated onthe identification plate and compare this with the type ofgas available at the installation location.Conditions: The product design is not compatible with the local type ofgasYou will require the conversion kit for the gas conversion;this kit also contains the required conversion instructions.▶ Follow the instructions in the manual for the conversionkit to carry out the gas conversion on the product.Conditions: The product design is compatible with the local type of gas▶ Proceed in accordance with the description in these in-structions.7.4 Checking and treating the heatingwater/filling and supplementary waterCaution.Risk of material damage due to poor-qual-ity heating water▶ Ensure that the heating water is of suffi-cient quality.▶ Before filling or topping up the system, check the qualityof the heating water.Checking the quality of the heating water▶ Remove a little water from the heating circuit.▶ Check the appearance of the heating water.▶ If you ascertain that it contains sedimentary materials,you must desludge the system.▶ Use a magnetic rod to check whether it contains mag-netite (iron oxide).▶ If you ascertain that it contains magnetite, clean the sys-tem and apply suitable corrosion-protection measures, orfit a magnet filter.▶ Check the pH value of the removed water at 25 °C.▶ If the value is below 8.2 or above 10.0, clean the systemand treat the heating water.▶ Ensure that oxygen cannot get into the heating water.Checking the filling and supplementary water▶ Before filling the system, measure the hardness of thefilling and supplementary water.Treating the filling and supplementary water▶ Observe all applicable national regulations and technicalstandards when treating the filling and supplementarywater.Provided the national regulations and technical standardsdo not stipulate more stringent requirements, the followingapplies:You must treat the heating water in the following cases:– If the entire filling and supplementary water quantity dur-ing the operating life of the system exceeds three timesthe nominal volume of the heating installation, or– If the guideline values listed in the following table are notmet, or– If the pH value of the heating water is less than 8.2 ormore than 10.0.TotalheatingoutputWater hardness at specific system volume1)≤ 20 l/kW > 20 l/kW≤ 50 l/kW > 50 l/kWkW ppmCaCO₃mol/m³ppmCaCO₃mol/m³ppmCaCO₃mol/m³< 50 < 300 < 3 200 2 2 0.02> 50to ≤ 200200 2 150 1.5 2 0.02> 200to ≤ 600150 1.5 2 0.02 2 0.02> 600 2 0.02 2 0.02 2 0.021) Nominal capacity in litres/heating output; in the case of multi-boiler systems, the smallest single heating output is to be used.