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  1. V

    UK One way 240v flow HOW

    Thanks for all your help guys. After a bit of research, it turned out the original contactor which was in the system was wired incorrectly by the installer so not activating the coil.
  2. V

    UK One way 240v flow HOW

    The only thing i have changed on this is the heat source. Which was a wood pellet burnsr. It was wired with two. Zero volts inputs CH and HW. Now that i have changed the heat source to oil, the new burner only has a single 240v input. I did not think the change of the heat source would...
  3. V

    UK One way 240v flow HOW

    Hi Mike. All the motorised values are working. I need a solution to thw back feed. Looking at 25amp no nc contractor with a coil. Would this work to stop the back feed? Thanks 1585088112 I dont so many connections as the HW on has two wires. Look electrical supplier suggested this, but...
  4. V

    UK One way 240v flow HOW

    Not sure. How can i tell 1585080162 There is a large red cylinder connected on the main return of the boiler of that hrlp 1585080934 There is a large red cylinder connected on the main return of the boiler of that hrlp
  5. V

    UK One way 240v flow HOW

    Hi Mike. Yes both pumps work. Thanks 1585067699 Ideally for the HW both pumps, and for the CH just thr boiler pump. If i can sort the bavk feed problem it would me that can have the direct HW direct to the boiler via the junctioned spur. So when the HW clock kicks both pumps are on. If the HW...
  6. V

    UK One way 240v flow HOW

    Yeap i agree and that works, but does that mean the boiler pump always needs to be on. I have noticed that if the repol is calling for heat, the boiler fires along with its pump, and if the hot water is on its all good. But if the repol is off the boiler along with its pump is off. Hot water...
  7. V

    UK One way 240v flow HOW

    Yes. Thats it. Only the two zones on the xl27 clock are connected to two hot water cylinders, and when the cirucuit is on a pump on the hot water line activates to draw the hot from the main feed connected to storage tank. I am not the original owner of the house, but came across these...
  8. V

    UK One way 240v flow HOW

    Hi There Thank you for your help. I have attached the boiler manual and from i read there is no pump overrun or dual inputs for the CF or HW. Just a mains 240v connection. All other switching is controlled externally. If this makes sense. Apologies the rough sketch i provided is to...
  9. V

    UK One way 240v flow HOW

    Hi The hesting side i.e does have a 2 port value. Only the repol tlr2 control to regulate the temp in the storage tank. The tlr2 controller has a bridged 240v feed within the call for heat when required. As far as i can tell there is no back feed issue here, if the hot water circuit is on...
  10. V

    UK One way 240v flow HOW

    Its has a two port value system on the hot water side. I have wired it to the call feed, but the back feed from the hot storage controller is causing the issue. Should i try to wire it back to the value in some way, or would i have the same back feed issue Thanks
  11. V

    UK One way 240v flow HOW

    Would this work. Thanks
  12. V

    UK One way 240v flow HOW

    Just checker the system. If the hot tank is not calling and the water circuit kicks in its not drawning any hot water as the pump on the boiler is not activating as the hot water circuit has no power due to the isolator. So need the relays. I recently changed to oil from a wood pellet boiler...
  13. V

    UK One way 240v flow HOW

    Hi. Attached is a basic diagram of the setup. In order to stop the back feed I have an isolation switch on the feed so that when I only want hot water I can turn off the hot storage control and just use the isolator. Its not ideal. If I were to install the two relays, would they simply be...
  14. V

    UK One way 240v flow HOW

    Hi. Thank you for the prompt response. The backfeed means that the hotwater pump is constantly on. I have that circuit on the clocks, so effectively its ignored as the temp control of the storage tank is backfeeding it when it is maintaining the heat. What type of relay is best to put on...
  15. V

    UK One way 240v flow HOW

    Good Morning. I have a fused spur which has 2x240v inputs and 1x240v out put. The 240v inputs are from heating control panels. One is from a timer clock for hot water and the other from a large 1000l hoh water storage tank. The ouput is to the oil burner. So the question is when i have i...

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