Installation Instructions VRT 39221 Notes on the documentationThe following information is intended to help youthroughout the entire documentation. Furtherdocuments apply in combination with this installationmanual.We accept no liability for any damage caused by failureto observe these instructions.Other applicable documents– The operating instructions for the Vaillantroom thermostat VRT 392– The operating and installation instructions of yourheating system– All instructions for the accessories1.1 Storage of the documentsPlease pass on this installation manual and all othervalid documents and auxiliary equipment to the user ofthe installation, This person takes over the responsibilityfor safekeeping. The documents must be made availableif required.1.2 Symbols usedPlease observe the safety instructions in this manual forthe installation of the appliance.d Danger!Immediate risk of serious injury or death!e Danger!Danger of death by electric shock!H Attention!Danger of burning and scalding!a Caution!Potentially dangerous situation for the productand environment!h Note!Useful information and instructions⇒ Symbol for a necessary task1.3 Validity of the instructionsThese installation instructions are exclusively applicableto the equipment with the following part number:00 2002 8509 VRT 392The part number of the control is shown on theidentification plate.1 Notes on the documentation