Vaillant aroTHERM VWL ../2 A 230 V series Installation Instructions Manual

7 Maintenance26 Installation instructions aroTHERM 0020147164_077.2 Preparing for maintenance7.2.1 Procuring spare partsThe original components of the unit were also certified aspart of the CE declaration of conformity. Information aboutavailable Vaillant genuine spare parts is available by con-tacting the contact address provided on the reverse of thisdocument.▶ If you require spare parts for maintenance or repair work,use only Vaillant genuine spare parts.7.3 Instructions before carrying outmaintenance workObserve the basic safety rules before carrying out mainten-ance work or installing spare parts.Danger!Risk of injury due to unauthorised accessto the coolant circuit.Escaping coolant may cause freezing if theexit point is touched.▶ Only carry out work on the coolant circuit ifyou have been trained to do so and if youhave the required protective clothing.▶ Avoid skin and eye contact with thecoolant.▶ Switch the system off.▶ Disconnect the system from the power supply.▶ Where necessary, disconnect the heating circuit from theproduct by using the stop valves.▶ If you have to replace parts on the heating circuit, youmust first drain the product.▶ When working on the product, protect all electric com-ponents from spray water.7.4 Yearly maintenance▶ Check that the safety devices are functioning properly.▶ Check the heating circuit's fill pressure.▶ Ensure that there are no traces of rust or oil on thecoolant circuit components.▶ Ensure that the product components are neither worn nordefective.▶ Check that all wires sit securely in the connectors.▶ Check the product's earthing.▶ Check the heating pump's flow temperature and the set-tings.▶ Remove any dust from the electronics box and the in-verter box.▶ Clean the ribbed pipe heat exchanger and ensure that aircirculates between the fins and around the product.▶ Check that the fan rotates freely.▶ Check that condensate can escape freely from the heatpump by removing the adaptor underneath the heatpump.▶ Clean the product as described in the operating instruc-tions.▶ Check that the vibration dampers are correctly seated onthe coolant lines.7.5 Cleaning the product7.5.1 Cleaning the frontWarning.Risk of injury due to sharp-edged casing.The product's casing sections have sharpedges.▶ Wear gloves when installing or dismant-ling the product's casing sections.3453.6.5.121. Remove the side casing. (→ Page 14)2. Remove both screws (1).3. Lift off the cover.4. Remove both screws (2) on the right front casing.5. Remove the right front casing.6. Lift the louvred grill (3) upwards.7. Remover the fan grill casing (4).8. Remove the nut (5) from the fan.9. Remove the fan.10. Clean the product and the ribbed pipe heat exchanger.7.5.2 Cleaning the backWarning.Risk of injury due to sharp-edged casing.The product's casing sections have sharpedges.▶ Wear gloves when installing or dismant-ling the product's casing sections.