Vaillant ecoTEC sustain 24 Installation And Maintenance Instructions Manual

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

30 Installation and maintenance instructions ecoTEC sustain 0020253094_05◁ An automatic air vent function is activated if thepressure exceeds 0.07 MPa (0.7 bar) for longer than15 seconds.9. Purge each radiator until the water escapes normally,and then close the installation's purging valves.10. Check whether all connections are leak-tight.Condition: If the noise persists in the boiler▶ Purge the product again by activating check programmeP.00.Check programmes – Overview (→ Page 45)9.8 Filling the hot water circuit1. Open the taps to fill the hot water circuit.2. Close the taps once the required volume of water hasflowed into the circuit.◁ The hot water circuit is filled.3. Check all connections and the entire system for leak-tightness.9.9 Checking the gas settingOnly a qualified competent person is authorised to imple-ment the CO2 setting on the gas valve assembly.Each destroyed seal must be replaced.The CO₂ adjusting screw must be sealed.Never modify the factory setting of the gas pressure regu-lator of the gas valve assembly.▶ Before you start up the product, compare the gas groupinformation on the data plate with the gas group availableat the installation site.Condition: The product design is not compatible with the local gas groupOnly Vaillant Service may perform a gas conversion.If a gas conversion to liquefied petroleum gas has been car-ried out, the smallest possible partial load is higher than isshown on the display. The correct values can be found in theTechnical data in the appendix.▶ Call Vaillant Service (0330 1003 143).▶ Do not start up the product.Condition: The product design is compatible with the local gas group▶ Proceed as described below.9.9.1 Checking the air/flue pipe/flue gasrecirculation1. Check the flue gas installation is intact in accordancewith the latest gas safe technical bulletin and informa-tion supplied in the installation instructions.2. For extended flue gas installations check for flue gasrecirculation using the air analysis point.3. Use a flue gas analyser.4. If you discover unusual levels of CO or CO 2 in the sup-ply air, search for the leak in the flue system or for signsof flue gas recirculation.5. Eliminate the damage properly.6. Check again whether the supply air contains any un-usual levels of CO or CO 2.7. If you cannot eliminate the damage, do not start up theproduct.9.9.2 Checking the gas flow rateThe gas flow rate has been set during production and doesnot require adjustment. With the front casing fitted check thegas flow rate of the boiler as follows:▶ Start up the product with the check programme P.01.▶ In addition, ensure that maximum heat can be dissipatedinto the heating system by turning up the room thermo-stat.▶ Wait at least 5 minutes until the boiler has reached itsoperating temperature.▶ Ensure that all other gas appliances in the property areturned off.▶ Measure the gas flow rate at the gas meter.▶ Compare the measured values with the correspondingvalues in the table.Qnw fromthe dataplateH gas in m³/h P gas in m³/hNom. +5% −10% Nom. +5% −10%24,4 2,58 2,71 2,32 1,90 2,00 1,7128,5 3,02 3,17 2,72 2,21 2,32 1,9934,6 3,66 3,84 3,29 2,69 2,82 2,42Condition: Gas flow rate not in the permissible range▶ Check all of the piping and ensure that the gas flow ratesare correct.▶ Only put the product into operation once the gas flowrates have been corrected.Condition: Gas flow rate in the permissible range▶ End the check programme P.01.▶ Allow the boiler to cool down by allowing pump overrun tooperate for a minimum of 2 minutes.▶ Record the boiler maximum gas flow rate onto theBenchmark gas boiler commissioning checklist.9.9.3 Checking the gas connection pressure (gasflow pressure)211. Ensure that the gas inlet working pressure can beobtained with all other gas appliances in the propertyworking.2. Close the gas stopcock (1).3. Undo the sealing screw on the test nipple (2).4. Connect a manometer to the test nipple (2).5. Open the gas stopcock (1).6. Start up the product with check programme P.01.7. In addition, ensure that maximum heat can be dissip-ated into the heating system by turning up the roomthermostat.