Vaillant ecoTEC plus SERIES Installation And Maintenance Instructions Manual

Also see for ecoTEC plus 612: Instructions for use Instructions for installation and servicing Instructions for use Installation and maintenance manual Instructions for installation and servicing

Contents

Vaillant ecoTEC plus SERIES Installation And Maintenance Instructions Manual Manual pdf 75 page image

Replacing componentsInstallation and maintenance instructions ecoTEC plus 0020116700_01 7514i The plug on the venturi has latching lugs withwhich it engages in the slot. You have to releasethe latching lug by pushing it in to pull off theplug.> Remove the plug from the venturi sensor (1, ¬ fig. 14.8).> Unscrew the two cap nuts at the top (5, ¬ fig. 14.8) andbottom (4, ¬ fig. 14.8) of the gas valve. Counterhold atopposite side of gas valve when unscrewing, or unscrewboth cap nuts at the same time.> Unscrew the fixing screw of the gas valve (3, ¬ fig. 14.8)out of the bracket.i Since the fixing screw is difficult to accessbeneath the retaining plate, alternatively, youcan remove the entire fan assembly(¬ section 14.3).> Remove the gas valve from the bracket.> Refit the new gas valve in the reverse order. Use newseals.> When the cap nuts are being screwed to the gas valve,counterhold at the opposite side of the gas valve ortighten both cap nuts simultaneously (¬ fig. 14.6).> After installing the new gas valve, perform a gas familycheck (¬ section 12.1.5) and a gas ratio setting(¬ section 10.11).14.5 Replacing the venturi including the massflow sensor12314.9 Replacing the venturi including the mass flow sensor> Remove the air intake pipe (¬ section 12.4.1).> Remove the plug from the venturi sensor (1, ¬ fig. 14.9).> Unscrew the cap nut (3 ¬ fig. 14.9) of the gas connectingpipe (2 ¬ fig. 14.9) from the gas valve.> Remove the venturi including the gas supply pipe fromthe fan by turning the bayonet fitting on the venturi anti-clockwise as far as it goes and removing it from the fan.21654314.10 Removing the gas connecting pipe> Remove the gas connecting pipe (1, ¬ fig. 14.10) from theventuri (2 ¬ fig. 14.10) by detaching the clamp(3, ¬ fig. 14.10) and pulling out the gas connecting pipevertically. Dispose of the seal (6, ¬ fig. 14.10).> Pull off the gas restrictor (5, ¬ fig. 14.10) in a straightdirection, and dispose of it.> Check whether the venturi is free of residue at the gasinlet side.a Danger!Risk of poisoning due to increased COlevels!Using the wrong gas restrictor size cancause higher CO levels.> When replacing the venturi, ensure thatyou use the correct gas restrictor (colourcoding and position of pins on the under-side of the gas restrictor).> Insert the gas restrictor for the gas group in questioninto the new venturi.Ensure that the colour of the gas restrictor correspondswith the colour of the coding resistance on the PCB inthe electronics box.When inserting the gas restrictor, ensure that the gasrestrictor is correctly aligned using the specified positionmarks on the top of the venturi and also the positioningpins (4) on the bottom of the gas restrictor.