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Removing a Low Loss Header from Samsung Gen6 System

 
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Air Source Heat Pumps (ASHPs)
Last Post by bontwoody 4 weeks ago
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 bontwoody
(@bontwoody)
Prominent Member Contributor
2816 kWhs
Joined: 2 years ago
Posts: 402
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
(@hughf)
Noble Member Member
2894 kWhs
Joined: 2 years ago
Posts: 474
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
(@bontwoody)
Prominent Member Contributor
2816 kWhs
Joined: 2 years ago
Posts: 402
01/04/2024 4:25 pm  

@heacol 👍

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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 EcoBaker
(@ecobaker)
Trusted Member Member
190 kWhs
Joined: 2 months ago
Posts: 25
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?


   
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 Brendon Uys
(@heacol)
Prominent Member Contributor
1882 kWhs
Expert
Joined: 3 years ago
Posts: 328
01/04/2024 4:43 pm  

@ecobaker probably not

Professional heat pump installer: Technical Director Ultimate Renewables Director at Heacol Ltd


   
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 bontwoody
(@bontwoody)
Prominent Member Contributor
2816 kWhs
Joined: 2 years ago
Posts: 402
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.

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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 bontwoody
(@bontwoody)
Prominent Member Contributor
2816 kWhs
Joined: 2 years ago
Posts: 402
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

unnamed

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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 iancalderbank
(@iancalderbank)
Noble Member Contributor
3640 kWhs
Joined: 2 years ago
Posts: 644
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
11.9kWp of PV
41kWh of Battery storage (3x Powerwall 2)
2x BEVs


   
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 bontwoody
(@bontwoody)
Prominent Member Contributor
2816 kWhs
Joined: 2 years ago
Posts: 402
02/04/2024 8:03 pm  

@iancalderbank Thanks Ian.

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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 EcoBaker
(@ecobaker)
Trusted Member Member
190 kWhs
Joined: 2 months ago
Posts: 25
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. 


   
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 iancalderbank
(@iancalderbank)
Noble Member Contributor
3640 kWhs
Joined: 2 years ago
Posts: 644
05/04/2024 9:20 am  

@ecobaker mine did not need a firmware change. the PWM worked first time. I am not even sure how you would go about getting a firmware change done.

radiator changes - yes - put your effort in there first. obvious gains as you have found.

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
11.9kWp of PV
41kWh of Battery storage (3x Powerwall 2)
2x BEVs


   
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 bontwoody
(@bontwoody)
Prominent Member Contributor
2816 kWhs
Joined: 2 years ago
Posts: 402
05/04/2024 9:27 am  

@ecobaker 

definitely. Bigger rads and lower flow temperature is your low hanging fruit. 

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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