Vaillant ecoTEC sustain 24 Installation And Maintenance Instructions Manual

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

12 Installation and maintenance instructions ecoTEC sustain 0020253094_055.4 Serial numberThe serial number can be found on a plastic label at the bot-tom of the front casing and on the identification plate.5.5 Product design5.5.1 Functional elements201914131516181711 1221132645791081 Electronics box2 Prioritising divertervalve3 Expansion relief valve4 Plate heat exchanger5 Condensate siphon6 Gas valve assembly7 Fan8 Compact thermalmodule9 Ionisation and ignitionelectrode10 Primary heat exchanger11 Temperature sensor inthe heating flow12 Temperature sensor inthe heating return13 Connection for theair/flue pipe14 Flue gas measuringstub pipe15 Air intake pipe16 Expansion vessel17 Pressure sensor18 Impeller sensor (do-mestic hot water)19 Automatic air vent20 Heating pump21 Bypass5.6 Safety Devices5.6.1 Electrical Supply FailureThe boiler will not work without an electrical supply. Normaloperation of the boiler should resume when the electricalsupply is restored.Reset any external controls, to resume normal operation ofthe central heating.If the boiler does not resume normal operation press thereset button. If the boiler does not resume normal operationafter this call your Installation/Servicing company or Vaillantservice.5.6.2 Overheating SafetyThe boiler software is designed to recognise the potential foran overheat lockout and will shutdown before this happens.To restart the boiler, press the reset button on the boilerinterface.If the boiler fails to resume normal operation and all externalcontrols are calling for heat, then call your Installation/ Servi-cing company or Vaillant service.5.6.3 Frost protectionThe appliance has a built in frost protection device that pro-tects the boiler from freezing. With the gas and electric sup-plies ON and irrespective of any room thermostat setting, thefrost protection device will operate the pump when the tem-perature of the boiler water falls below 12 °C.A timer is used so that the temperature can be checked peri-odically. After 10 minutes the pump will be stopped if thetemperature is higher than 10 °C or has already reached35 °C. The burner will activate if the boiler temperature doesnot reach 10 °C after 30 minutes or at any time if the temper-ature drops to 5 °C.The burner will switch off when the temperature reaches35 °C.5.6.4 Condensate Drain BlockageAs a safety feature the boiler will stop working if the con-densate drain becomes blocked. During freezing conditionsthis may be due to the forming of ice in the condense drainexternal to the house. Release an ice blockage by the useof warm cloths on the pipe. After pressing reset the boilershould restart.