Vaillant ecoTEC sustain 24 Installation And Maintenance Instructions Manual

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

40 Installation and maintenance instructions ecoTEC sustain 0020253094_0513.4 Deleting the fault memory1. Clear the fault memory using diagnostics code d.94.2. Set a diagnostics code. (→ Page 26)13.5 Resetting parameters to factory settings1. Reset all parameters to the factory settings using dia-gnostics code d.96.2. Set a diagnostics code. (→ Page 26)13.6 Preparing the repair work1. Decommission the product.2. Disconnect the product from the power grid.3. Remove the front casing. (→ Page 18)4. Close the gas stopcock.5. Close the service valves in the heating flow and in theheating return.6. Close the service valve in the cold water pipe.7. Drain the product to replace hydraulic components(→ Page 39).8. Ensure that water does not drip on live components(e.g. the electronics box).9. Use only new seals and o'ring. Do not use additionalcompounds.13.6.1 Procuring spare partsThe original components of the product were also certifiedby the manufacturer as part of the declaration of conformity.If you use other, non-certified or unauthorised parts duringmaintenance or repair work, this may void the conformity ofthe product and it will therefore no longer comply with theapplicable standards.We strongly recommend that you use original spare partsfrom the manufacturer as this guarantees fault-free and safeoperation of the product. To receive information about theavailable original spare parts, contact the contact addressprovided on the back page of these instructions.▶ If you require spare parts for maintenance or repairwork, use only the spare parts that are permitted for theproduct.13.7 Replacing defective components13.7.1 Replacing the burner121. Undo the four screws (1) on the burner.2. Remove the burner.3. Install a new seal (2) on the new burner.13.7.2 Replacing the fan or gas valve assembly7432169851. Remove the air intake pipe.2. Remove the plug from the gas valve assembly (7).3. Remove the plugs (6) and (9) from the fan motor bypushing in the latching lug.4. Unscrew the connection from the gas valve assembly(8).5. Unscrew the three screws (2)-(4) between the mixturepipe (1) and the fan flange.126. Remove the entire fan/gas valve assembly unit from theproduct.7. Unscrew both fixing screws (1) on the gas valveassembly and remove the fan from the gas valveassembly.8. Replace the defective fan or the defective gas valveassembly.9. Install the gas valve assembly and the fan in the sameposition as before. Use new seals for this.10. Screw the fan to the gas valve assembly.11. If you had removed the gas pipe, screw the union nut ofthe gas pipe (2) only loosely to the gas valve assembly.Only tighten the union nut on the gas valve assemblyafter the installation work has been completed.