# Samsung gen6 pre-plumbed issues **URL:** \ **Category:** Heatpump\ **Created:** [18 May 2025 22:19 UTC](https://community.openenergymonitor.org/t/samsung-gen6-pre-plumbed-issues/28623 "2025-05-18T22:19:58Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![HughF](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/h/edb3f5/32.png) [@HughF](https://community.openenergymonitor.org/u/HughF)\ **Post date:** [18 May 2025 22:19 UTC](https://community.openenergymonitor.org/t/samsung-gen6-pre-plumbed-issues/28623/1 "2025-05-18T22:19:58Z")
Good evening forum collective… I’ve spent the day assisting my builder commission his Samsung gen6 with a pre-plumbed worldheat cylinder and we’ve got a few issues. We’ve decided to use the Samsung controller as the room thermostat, so we’ve configured the field settings values per the midsummer quick start guide to enable that. I’ve setup the weather comp/water law and I’ve set the DHW schedule and temperature. It does a DHW charge just fine, but I cannot get it to switch over to heating. The issue is that the worldheat cylinder includes a integrated buffer, along with associated secondary pump and 2 port zone valve. I cannot for the life of me get the Samsung to switch the zone valve (and the pump, wired across the zone valve aux contacts) on when calling for central heating. I can get it to run the zone valve when I go into self-test and manually drive it, but here’s the weird thing; when I activate it to on, the contacts on the aux switch close between white and orange, implying that the valve is powering off when I activate it. White being the NC contact to orange. I did not have my tester or multimeter with me today to verify whats actually occuring. I should add that it did run the zone valve and pump when it was asked to do a DHW charge. So, the issue can be resolved in 2 ways: remove the zone valve and secondary pump, re-plumb the buffer as a volumiser and just leave the primary pump and 3 port to do what’s required (my preference, for simplicity and efficiency), or try and get the Samsung controller to actively drive the zone valve when required. Does anyone have any experience with using a samsung MIM to drive a zone valve or are you all running direct? I’ve got a lot more experience with Cool Energy/SPRSUN on the Carel platform, so this Samsung is ‘a bit weird’ 😃 ![IMG_0556](https://community.openenergymonitor.org/uploads/default/original/3X/a/4/a4f2a16c535f10b83fc8a4a94746bbb204f4fabc.jpeg) ---
**Author:** ![Swwils](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/swwils/32/21026_2.png) [@Swwils](https://community.openenergymonitor.org/u/Swwils)\ **Post date:** [19 May 2025 11:40 UTC](https://community.openenergymonitor.org/t/samsung-gen6-pre-plumbed-issues/28623/2 "2025-05-19T11:40:53Z")
Does the gen 6 have parameters that determine auxiliary output activation for CH (distinct from DHW)? ---
**Author:** ![HughF](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/h/edb3f5/32.png) [@HughF](https://community.openenergymonitor.org/u/HughF)\ **Post date:** [19 May 2025 13:23 UTC](https://community.openenergymonitor.org/t/samsung-gen6-pre-plumbed-issues/28623/3 "2025-05-19T13:23:40Z")
This is what I’m wondering. Couldn’t see anything in the field settings though. ---
**Author:** ![arc12](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/arc12/32/20097_2.png) [@arc12](https://community.openenergymonitor.org/u/arc12)\ **Post date:** [20 May 2025 18:44 UTC](https://community.openenergymonitor.org/t/samsung-gen6-pre-plumbed-issues/28623/4 "2025-05-20T18:44:36Z")
Hi - not addressing your specific issue (as I have a Daikin HP), but I did have other issues with the Worldheat PPC which was installed. > [@Daikin Pre-plumbed Cylinder (WorldHeat) Buffer Strangeness](https://community.openenergymonitor.org/t/daikin-pre-plumbed-cylinder-worldheat-buffer-strangeness/27332): > > I have been looking at the water flow and return temperatures on the 4-pipe buffer which forms part of the Manchester-made WorldHeat pre-plumbed cylinder which is installed with a Daikin EDLA. Something is quite wrong so I am seeking other people with the same hardware to “compare notes” with a view to finding out whether there is something wrong with the install, manufacture of my tank, or the fundamental buffer design in these units. The buffer appears to be plumbed in correctly. Reading from… ---
**Author:** ![HughF](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/h/edb3f5/32.png) [@HughF](https://community.openenergymonitor.org/u/HughF)\ **Post date:** [21 May 2025 05:17 UTC](https://community.openenergymonitor.org/t/samsung-gen6-pre-plumbed-issues/28623/5 "2025-05-21T05:17:53Z")
Interesting discussion, thanks for the link. I’ll check the labels on the ports today when I’m back on site. Pretty sure that on the Samsung WH cylinder that central port is CH flow, and my pump is arrows up. ---
**Author:** ![HughF](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/h/edb3f5/32.png) [@HughF](https://community.openenergymonitor.org/u/HughF)\ **Post date:** [21 May 2025 06:09 UTC](https://community.openenergymonitor.org/t/samsung-gen6-pre-plumbed-issues/28623/6 "2025-05-21T06:09:12Z")
My suspicions are that if you are using this cylinder as supplied, you must use an external stat to switch the zones on/off. I’ll check today. Shame if that’s the case. ---
**Author:** ![HughF](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/h/edb3f5/32.png) [@HughF](https://community.openenergymonitor.org/u/HughF)\ **Post date:** [21 May 2025 10:40 UTC](https://community.openenergymonitor.org/t/samsung-gen6-pre-plumbed-issues/28623/7 "2025-05-21T10:40:01Z")
Changed the settings to use external stat, jumpered b20 to b22 and added a missing permanent live to the grey wire on the zone valve (secondary pump is on orange) - all working sweetly