ecoTEC exclusive installation and maintenance instructions / 0020017768_0224- Turning to the left: higher CO2content,- Turning to the right: lower CO2content,h Note!Natural gas: Adjust only in increments of 1/8turn and wait approx. 1 minute after each ad-justment until the value stabilises.h Note!Liquid gas: Adjust only in increments of 1/16turn and wait approx. 1 minute after each ad-justment until the value stabilises.• After completion of the setting process, hinge the airintake pipe back up.• Check the CO2content again.• If necessary, repeat the setting process.• Press the "i" button. The "Full load mode" is turnedoff. The full load mode is also exited if no button ispushed for 15 minutes.• Re-secure the air intake pipe with the screw (3).• Put the front casing back on.SettingsNaturalgas HTolerancePropaneTolerance UnitCO2 after 5 minutes full loadmode with front casing remo-ved9,0 +/- 1,0 10,0 +/- 0,5 Vol.–%set for Wobbe-Index W0 12,4 22,5 kWh/m3Table 6.1 Factory gas settings6.3 Checking the equipment functionAfter installing and checking the gas supply pressure,perform a function check before commissioning the ap-pliance and handing over to the user.• Commission the appliance in accordance with the in-structions in the relevant operating manual.• Check the gas infeed, exhaust gas installation, boiler andheating installation and the hot water pipes for leaks.• Check the flue pipe for proper installation.• Check over-ignition and that the flame on the burneris burning evenly.• Check the function of the heating (see Chapter 6.3.1)and the hot water preparation (see Chapter 6.3.2)• Hand the unit over to the user.The Vaillant ecoTEC exclusive has status codes whichindicate the operating condition of the appliance in thedisplay. Functional checks of the hot water and heatingoperation can be undertaken using these status codesby pushing the button "i".Fig. 6.7 Function check6.3.1 Heating• Switch on the appliance.• Make sure that there is a heat demand for heating(set the room thermostat or the weather-controlledcontroller to "demand").• Press "i" to activate the status indicator.Fig. 6.8 Display during heating modeAs soon as there is a heat demand, the appliance goesthrough the status displays "S. 1" to "S. 3", until the ap-pliance is running properly in normal operation and thedisplay "S. 4" appears.7 Adapting the appliance to the heating system