Vaillant TURBOmax Pro 28 Instructions For Installation And Servicing

Also see for TURBOmax Pro 2 E: Installation instructions

Contents

27BOILER INSTALLATION SEQUENCEControlsExternal electrical controlsThe boiler terminals 3, 4 and 5 arefor connecting externalelectrical controls such as a timeswitch and/or room thermostat.Terminals 3 and 4 are linked togetherwhen the boiler is supplied. If externalcontrols are used, this link must beremoved, and the controls connectedacross terminals 3 and 4.Terminal 5 is an additional neutralconnection for external neutrals suchas from the anticipator of a roomthermostat.Connection of external controlsConnection details for programmableroom thermostats.Fig. I.12 shows the connection detailswhere a programmable roomthermostat (time switch with built inroom thermostat) is used to control theboiler.Important: The arrowed numbersindicate connection into the relevantterminal in the boiler terminal strip.Connection details for external timeswitches and boiler terminal strip.Fig. I.13 shows the connection detailswhere a time switch is used without aroom thermostat to control the boiler.Important: The arrowed numbersindicate connection into the relevantterminal in the boiler terminal strip.If a room thermostat is to beconnected in addition to a time switchthe wire between the time switch„ON“ terminal and boiler terminal 4should be broken by the contacts ofthe room thermostat (see schematiclayout, Fig. I.14).Vaillant optional plug in timeraccessoriesRefer to the instructions supplied withthe optional accessories forconnection details.Upon completion of all electricalconnections refit the terminal boxcover by pushing into place. Thecover is secured by two locking clips.Thermostatic radiator valvesThe boiler has a built in automaticbypass valve making it ideal for usein systems with thermostatic radiatorvalves (no separate system bypass isrequired).Connection details for programmable thermostatsFig. I.12L N 2 3 4L N 3 41ACL DraytonLyfestyle PT271, PT371ACL DraytonDigistat 2, 3, 4ACL DraytonDigistat RF - SCR ReceiverDanfoss RandallTP4, TP5, TP5EDanfoss RandallTP5E RF with receiver RX1Danfoss RandallTP75Grässlin TowerchronRTC7HoneywellCM61, CM67, CM31, CM37HorstmannCentaurstat 1, 7Landis & StaefaREV 11, REV 15, REV 221 23 43SunvicTLX 6501SunvicTLX RFP, TLX RFDVaillantVRT 9083QT, VRT 9084QWN 1 3N 32LL 43 24 31L N 2 3 4L N 3 41B C 2 3 41A35 641 23 43A B3 4C1 2 43 43L L13 4Smiths TimeguardProgramaSTAT PRT11, PRT17 L N 4L N33 41 23 43L N 2 3 4L N 3 41F 9 8L N73 4