Vaillant TURBOmax Pro 28 Instructions For Installation And Servicing

Also see for TURBOmax Pro 2 E: Installation instructions

Contents

28BOILER INSTALLATION SEQUENCEFor optimum fuel economy it isrecommended that where TRV’s areused they are used in conjunctionwith a programmable roomthermostat or separate timer androom thermostat to ensure completeboiler shut down when the heatingdemand is satisfied. (The radiator inthe room containing the roomthermostat should not be fitted with aTRV).Frost protectionThe boiler has an integral frostthermostat which is designed forprotection of the boiler.To protect remote or exposed parts ofthe heating system or propertyadditional frost protection measuresmust be taken such as the installationof an external frost thermostat. Thisfrost thermostat should be connectedacross the boiler terminals 3 and 4,in parallel with any external heatingcontrols.Circulating pumpThe boiler incorporates a built incirculating pump that is fully prewired(no additional wiring is necessary).The pump incorporates an automaticoverrun period after the boilerswitches off.Anti-cycling ‘economiser’ controlThe boiler incorporates a built inanti-cycling control to ensure thatenergy wasteful short cycling of theboiler cannot occur. This controlprevents the boiler from re-igniting fora preset period of 5 minutes aftercentral heating operation (the hotwater operation is unaffected by thiscontrol and hot water can be drawnat any time).Automatic pump spin control(APS)The boiler incorporates a built incontrol which will spin the built incirculating pump and operate thediverter valve once in a 24 hourperiod. This control helps to preventseizure when the boiler is notoperated for a period of time. Thiscontrol is not active when the powersupply to the appliance is turned off.Note: To temporarily override theanti-cycling control turn the mainboiler on/off switch to the offposition „0“ and then back to the onposition „I“ after a few seconds.L N 2 3 4L N 3 41ACL DraytonTempus 1, Tempus 2Lyfestyle LP111, LP711ACL DraytonSwitchmasterSM300ACL DraytonSwitchmaster 980Danfoss Randall103 SeriesDanfoss RandallSet 1E, TS975Danfoss RandallTS715Grässlin TowerchronQE1, QM1HoneywellST610A, ST6100CHorstmannChannel PlusH11, H17, 425 CoronetHorstmannCentaur PlusC11, C17L N 2 3 4L N 4 31Potterton MysonEP 4002, EP 5002Smiths TimeguardSupplyMASTERFST11, FST17SunvicSelect 107N 1 A B CN 42LL 33 41 2 6 5 E4 L3 N3EN E 2 3 4N E1LL 35 64L N 2 3 4L N 3 41L N 2 3 4L N 3 41L N 2 3 4L N 3 41N E 2 3 4N E1LL 35 64N E 2 3 4N E1LL 3 4L N 2 3 4L N 3 41L N 2 3 4L N 3 41A B D L NL NCNE31 243 4 5 E1 2 44 3 2/L 1/N3 6 5 mains supplyL N EELandis & StaefaRWB7, RWB30Fig. I.13Connection details for time switch3987MAINSSUPPLY230 V50 HzLLL NNN N20 VDC, DO NOT USE IN UK!3 A FUSE SWITCHCONTACTSROOMTHERMOSTATCLOCK4 5Fig. I.14GU_Ecomax_20/0GB