Danger! Risk of death from electric shock! Danger! Risk of burns or scalding! Caution! Potentially dangerous situations for the product and environment. Note! Useful information and instructions. • Symbol for a necessary task Instructions for use ecoTEC plus / 0020020829_03...
Never tamper with the boiler or other parts of Frost protection and monitoring devices can the system. Never attempt to perform mainte- only function when the electrical supply to the nance or repairs yourself. boiler is on. Instructions for use ecoTEC plus / 0020020829_03...
Information on installation and operation 3 Information on installation and 3.4.1 The appliance Do not dispose of your Vaillant ecoTEC boiler or any of operation its accessories with household waste. Make sure the old appliance and any existing accessories are disposed of Factory guarantee properly.
• Ensure the electrical supply to the boiler is turned on. Fig. 4.2 Display on ecoTEC plus The ecoTEC plus appliance is fitted with a digital infor- mation and analysis system. This system provides infor- mation on the operating status of your appliance.During normal operation, the display (1) shows the current heating flow temperature (in this example 45 °C).
This corresponds to: • Set the room thermostat (1) and/or the thermostatic - left limit approx. 35 °C radiator valves (2) according to the instructions - right limit max. 65 °C. supplied with the control(s). Instructions for use ecoTEC plus / 0020020829_03...
In switching phases, for example on starting up again after the flame was extinguished, the status message “S.” briefly appears. • Press the “i” button (1) again to switch the display back to normal mode. Fig. 4.9 Troubleshooting Instructions for use ecoTEC plus / 0020020829_03...
Note! If the appliance is switched off for a long time (for example when you are on holiday) you should also turn off the gas supply and the electrical supply. Instructions for use ecoTEC plus / 0020020829_03...
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