DeltaSol BS Plus - Ika

DeltaSol ® BS Plus5.1 VariousPump is overheated, but no heat transfer from collectorto the store, feed flow and return flow are equally warm,perhaps also „bubble“ in the lines.Pump starts for a short moment, switches-off, switches-onagain, etc. („controller after-running“)“).Air in the system?noyesIs the collector circuitblocked at the dirt trap?Vent the system; increasesystem pressure to atleast static primary pressureplus 0,5 bar; if necessarycontinue to increasethe pressure, switch thepump off and on for ashort time.Is the temperature differenceat the controllertoo small?noyesWrong placing of thecollector sensor?Change Ton and Toffaccordingly.noo.k.yesClean the dirt trap.noyesPlausibility control of theoption tube collector specialfunction?Mount the collector sensorat solar feed flow(warmest collector output);use the immersionsleeve of the respectivecollector.Pump starts up very late and stops working soon.The temperature difference between store and collectorincreases enormously during operation; the collector circuitcannot dissipate the heat.Switch-on-temperaturedifference Ton toolarge?Collector circuit pumpdefective ?noyesCollector sensor un favourablyplaced (e.g. contactsensor instead of immersionsleeve sensor?)yesChange Ton and Toffaccordingly.If necessary, activate tubecollector function.noyesHeat exchanger calcified?noyesTest / replace it.Decalcify it.o.k.Heat exchanger plugged?noyesClean it.Heat exhcanger toosmall?yesRecalculation of thedimensioning.© NEHS_07333_deltasol_bs_plus.mon.indd| 22