Hi all,
My house has alot of south facing windows, including skylights, so gets alot of solar gain. When the sun was out a few weeks ago it got up to 23 degrees in the living room.
I tried activating cooling mode on my heatpump at a flow temp of 18 degrees to avoid water condensating and i was surprised how effective it was at making the house feel cooler. Alot of my radiators are piped TBOE which I’d expect to help somewhat. I confirmed this by using a thermal imaging camera to see the distribution through the radiator. This got me thinking, with the radiators piped TBOE, it would surely be better if the water went the opposite way around the heating circuit - entering at the bottom and pushing the warmest water out of the top.
I was thinking about the best way to achieve this and I thought a motorised 4 port valve would be just the think, powered by the heatpump controller when cooling is activated. A couple of sticking points:
I can’t find such a valve
I dont know if such an output exists on the Samsung heatpump controller.
I don’t think it does - a quick check of the full NASA Message listing (NASA Protocol - Samsung EHS Wiki) doesn’t reveal a relevant output (and Samsung do not appear to adopt the large majority of these message numbers in the MIM-E03EN in any case).
My Samsung HTQ installer set up the controller for Heat only but I was thinking of implementing Cool mode ready for this summer. I asked Samsung Tech Helpline for guidance and they said: “When 3rd party controls are utilised cooling mode is activated by a separate cooling thermostat input. You would need a 240V signal into the B21 input terminal to switch the system to cooling mode.” and emailed me these diagrams:
