Vaillant ecoTEC sustain 24 Installation And Maintenance Instructions Manual

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

0020253094_05 ecoTEC sustain Installation and maintenance instructions 318. With the boiler operating at full load check that the gasinlet working pressure at the reference test point (2)complies with the requirements.Permissible gas flow pressure for operation withNatural gas H 1.3 to 2.3 kPa(13.0 to 23.0 mbar)Permissible gas flow pressure for operation withLiquefied petroleum gas P 2.3 to 4.3 kPa(23.0 to 43.0 mbar)9. Should the pressure recorded at the reference test pointin the boiler be lower than indicated check if there isany blockage in the pipework or if the pipework is un-dersized.Condition: Gas flow pressure not in the permissible rangeCaution.Risk of material damage and operatingfaults caused by incorrect gas connec-tion pressure.If the gas connection pressure lies outsidethe permissible range, this can cause oper-ating faults in and damage to the product.▶ Do not make any adjustments to theproduct.▶ Do not start up the product.▶ If you cannot correct the failure, notify the gas supplycompany and proceed as follows:▶ End the check programme P.01 or P.04.▶ Allow the boiler to cool down by allowing pump overrunto operate for a minimum of two minutes.▶ Close the gas stopcock.▶ Remove the pressure gauge and retighten the sealingscrew (2) for the measuring nipple.▶ Open the gas stopcock (1).▶ Check the test nipple for gas tightness.▶ Close the gas stopcock (1).▶ Disconnect the product from the power grid.▶ You must not start up the boiler.Condition: Gas flow pressure in the permissible range▶ End the check programme P.01 or P.04.▶ Allow the boiler to cool down allowing pump overrun tooperate for a minimum of two minutes.▶ Close the gas stopcock (1).▶ Remove the pressure gauge and retighten the sealingscrew (2) for the measuring nipple.▶ Open the gas stopcock (1).▶ Check the test nipple for gas tightness.▶ Reset boiler controls for normal operation.▶ Record the appliance gas inlet working pressure (kParesp. mbar) in the Benchmark gas boiler commissioningchecklist.9.9.4 Checking the CO₂ content1. Start up the product with the check programme and setthe value.– Setting value for the programme P.01: 100Check programmes – Overview (→ Page 45)2. Wait until the value that is read is stable.– Waiting period for reading a stable value: 5 min13. Unscrew the cover from the flue gas analysis point (1).4. Measure the CO₂ content at the flue gas analysis point.5. Compare the measured value with the correspondingvalue in the table.Checking the CO₂contentRemovedfront casingFitted frontcasingNatural gas H Natural gas HCO₂ at full load 9.0 ±1.0 vol. % 9.2 ±1.0 vol. %CO at full load ≤ 250 ppm ≤ 250 ppmCO/CO₂ ≤ 0.0031 ≤ 0.0031Checking the CO₂contentRemovedfront casingFitted frontcasingLiquefied pet-roleum gas PLiquefied pet-roleum gas PCO₂ at full load 10.1 ±0.5 vol.%10.3 ±0.5 vol.%CO at full load ≤ 250 ppm ≤ 250 ppmCO/CO₂ ≤ 0.0026 ≤ 0.0026◁ The value is OK.▽ The value is not OK; you cannot start up theproduct.▶ Contact customer service.9.10 Thoroughly flushing the heating installation("hot")1. Operate the appliance until the boiler and the heatingsystem are up to temperature.2. Check the heating system for leaks.3. Connect a hose to the drain valve located at the lowestposition of the heating system.4. Shut off the boiler, open the drain valve and all purgevalves on the radiators and allow the water to flow outof the heating system and the boiler quickly and fully.5. Close the drain valve.6. Fill the heating system again with water as described inFilling the heating installation and Purging the heatinginstallation.7. Re-fill the system until the system design pressure of0,1 MPa (1,0 bar) is attained.