Updating gravity fed to fully pumped

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I am updating my heating system from gravity fed to fully pumped (S-Plan). My extension kit is quite old and only has a single button. How do I make the change?

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  • johnnyp78
    johnnyp78 ✭✭✭
    Answer ✓
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    Look at page 13. Try setting it for an s plan system and see if that makes a difference.
  • steve2
    steve2
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    That sorted it. Many thanks

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  • johnnyp78
    johnnyp78 ✭✭✭
    edited August 2023
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    Have a look at page 8 then p13 https://cdn.brandfolder.io/607DGEMS/as/fn5jmx6wp7tk6t3rmzb79mw7/Extension_Kit_Manual_-_230V_Relay_Installations.pdf
  • steve2
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    That's great but, sonce it is currently configured for a gravity fed system, it turns the hot water on even if I only want the central heating on
  • royi
    royi ✭✭
    edited August 2023
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    @steve2 I had the same issue when I set up my system in January. I thought I had a gravity fed system, the instructions were misleading. I have a Y system (boiler and separate cold water tank and a immersion heater with its own themostat). I changed it from S plan to Y plan and it worked, so no more having the hot water coming on at the same time as the heating.