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 299.3 Filling the condensate siphonA BC1231. Unclip the lower section of the siphon (1) from the up-per section of the siphon (2) without removing the pro-duct's front casing.2. Remove the float (3).3. Fill the lower section of the siphon with water up to 10mm below the upper edge of the condensate dischargepipe.4. Re-insert the float (3).NoteCheck that the float is present in the con-densate siphon.5. Clip the lower section of the siphon (1) into the uppersection of the siphon (2).9.4 Switching the product on and off▶ Press the on/off button on the product.◁ The display shows the basic display.9.5 Preventing low water pressureThe required filling pressure is between 0.08 and 0.2 MPa(0.8 and 2 bar).If the water pressure falls below 0.05 MPa (0.5 bar), thevalue flashes in the display.If the water pressure falls below 0.03 MPa (0.3 bar), theproduct switches off. The display shows 0.0 bar (0.0 MPa).Fault F22 is stored in the fault list.▶ Top up the water in the heating installation to start up theproduct again.◁ The pressure value flashes in the display until apressure of 0.05 MPa (0.5 bar) or higher has beenreached.9.6 Flushing the heating installation for the firsttime ("cold")NoteThe complete heating system must be flushedat least twice: Once with cold water and oncewith hot water in accordance with the followinginstructions.1. Check whether all thermostatic radiator valves and bothservice valves on the product are open.2. Connect a hose to the drain valve that is located at thelowest position in the heating system.3. Open the radiator valves and the drain valves so thatthe water can drain quickly. Start at the next point in theinstallation and open the purging valves on the radiatorsso that the contaminated water can completely drain.4. Close the draining cocks.5. Refill the heating system with water.6. Check that the expansion relief valve of the heatingsystem is functioning correctly by turning the handleon the valve.7. Check the pressure in the heating system and top upwith water if necessary.8. Close the filling valve and the cold water tap.9.7 Filling and purging the heating installation1. Flush the heating installation through.2. Observe the information on the topic of treating(→ Page 28) heating water.13. Undo the cap of the automatic air vent (1) by one to tworotations and leave it open, as the product purges itselfvia the automatic air vent even in continuous operation.4. Open all thermostatic radiator valves.5. Supply the heating circuit with water.6. Check whether the stopcocks for the heating flow andreturn are open.7. Start filling programme P.06.Check programmes – Overview (→ Page 45)◁ The prioritising diverter valve is moved to the mid-position.8. Fill with water until the required filling pressure isreached.– Recommended filling pressure: 0.8 to 2 bar◁ The heating and domestic hot water function cannotbe activated.◁ The pressure value flashes in the display until apressure of 0.05 MPa (0.5 bar) or higher has beenreached.