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Removing a Low Loss Header from Samsung Gen6 System

EcoBaker · 2024-03-28T23:00:46Z

My system has a low loss header, which for effiency I’d like to remove. Currenlty averaging a daily COP of 3.5 to 3.8, which is good but I’d like it to be better. I have a 8k Samsung gen6, however all the installation information from Samsung or Joule says to use a header or buffer. My system map is this, its fairly simple one zone in two bedroom mid terrace. Those of you with Samsung gen6 HP do you have a system without a header or buffer, my plan was to just remove it and connect up the flow and returns and see what happens. I just want to make sure I’m not doing something catastrophic before its done.

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Air Source Heat Pumps (ASHPs)

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bontwoody

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01/04/2024 4:23 pm

@ecobaker Thats correct, I made the mistake of getting the same pump, but then decided to to sell it on ebay and get the UPM3 FLEX AS 25-75 130 AZA also on ebay.

House-2 bed partial stone bungalow, 5kW Samsung Gen 6 ASHP (Self install)
6.9 kWp of PV
5kWh DC coupled battery
Blog: https://thegreeningofrosecottage.weebly.com/
Heatpump Stats: http://heatpumpmonitor.org/system/view?id=60

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HughF

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01/04/2024 4:23 pm

@heacol easily resolved with a jumper wire on the end of the flow sensor cable 🤣

When I was commissioning my Sprsun I could not get the air out, kept tripping on a flow sensor issue. Jumpered the flow sensor out and left it at that. Haven’t seen a flow error since then 🤣 Got the air out eventually.

Off grid on the isle of purbeck
2.4kW solar, 15kWh Seplos Mason, Outback power systems 3kW inverter/charger, solid fuel heating with air/air for shoulder months, 10 acres of heathland/woods.

My wife’s house: 1946 3 bed end of terrace in Somerset, ASHP with rads + UFH, triple glazed, retrofit IWI in troublesome rooms, small rear extension.

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bontwoody

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01/04/2024 4:25 pm

@heacol 👍

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EcoBaker

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Topic starter 01/04/2024 4:42 pm

If the HP can't modulate below flow temp of 45 degrees and I'm aiming for flow temps of 35, is there much point in swapping out for a different pump?

Samsung Gen6 8kw ASHP in a two bed victorian mid terrace.

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Brendon Uys

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01/04/2024 4:43 pm

@ecobaker probably not

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bontwoody

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01/04/2024 4:46 pm

@ecobaker Probably not if the unit cant modulate at 35C. Maybe @Iancalderbank can advise if it works as low as that as i havent run mine that low yet.

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bontwoody

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02/04/2024 12:33 pm

@ecobaker @heacol

I managed to talk to Glyn Hudson who was having difficulties getting PWM to work with his Samsung. However he has managed to sort it with a firmware update of the indoor controller and now it works at low flow temperatures, so it seems Samsung have sorted it.

https://community.openenergymonitor.org/t/samsung-mim-c02n-s-net-pro-dongle/25418/5

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iancalderbank

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02/04/2024 5:45 pm

@bontwoody it will run at 35, but only stably if you have enough emitters to balance the min output of the HP. Which in my case with a 16kw gen6 unit is 3.5kw. Below about 34-35C my emitter output drops too low , so it would short cycles , so I have tuned the WC so it doesn't go much below that.

lots of run data on my heatpumpmonitor.org data, as per my sig.

My octopus signup link https://share.octopus.energy/ebony-deer-230
210m2 house, Samsung 16kw Gen6 ASHP Self installed: Single circulation loop , PWM modulating pump.
My public ASHP stats: https://heatpumpmonitor.org/system/view?id=45
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bontwoody

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02/04/2024 8:03 pm

@iancalderbank Thanks Ian.

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EcoBaker

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Topic starter 05/04/2024 9:05 am

@bontwoody @iancalderbank Thanks for the advice. Looks like Ill try and get a firmware update before removing the LLH, although that could be tricky.

Also I just swapped out a small radiator for a much bigger one in my kitchen which resulted in a jump of daily COP from 3.6 to 4.1, I have three other rads I want to swap as well when I can afford to do it. I think thats probably a first step before removing a LLH or changing pump.

Samsung Gen6 8kw ASHP in a two bed victorian mid terrace.

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iancalderbank

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