Vaillant VEN 5/5 U classic Installation And Operating Instructions Manual

2 Safety precautions and regulationsVEN 5/5 classic; VEN 5/5 exclusiv122 Safety precautions and regulationsVaillant VEN electric storage water heaters are made tothe latest technical benchmarks and recognised safetystandards. Incorrect operation of the appliance cannevertheless lead to the possibility of serious or fatalinjury to the user or third parties, along withmalfunctions in the appliance or other material damage.Caution!These appliances are designed for heatingwater from the mains supply only. Theappliance may suffer corrosion damage if thewater supply is not of accepted drinking-water quality.Caution!The Vaillant electric storage water heater isnot designed to work under pressure, andshould therefore only be installed along with aVaillant low-pressure valve assembly.2.1 Safety precautionsInstallation of the appliance, and any repairs that maybe required, should only be carried out by an authorisedservice installer.Danger!Note that VEN appliances can deliver tap-outlet temperatures of up to 85 °C.In the event of a malfunction occurringThe safety fuse blows whenever the appliance suffers amalfunction. The cause of the fault must be determined,and the fault rectified, by an authorised service installerbefore the appliance can be put back into service. Pleaserefer to section 3.5, page 20 ("Troubleshooting").Caution!Do not attempt to repair the applianceyourself. Do not try to open the appliance.The safety fuse must only be replaced by anauthorised service installer.For added safety in the event of a fault occurring, it isadvisable to disconnect the appliance from the mainspower supply at the main switch. If there are any leaks,ensure also that the cold-water supply inlet valve to theappliance is shut. Contact an authorised service installerimmediately in order to have the fault repaired.