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12kW Samsung gen 6 short cycling

 
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Air Source Heat Pumps (ASHPs)
Last Post by iantelescope 2 years ago
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 Craig1980
(@craig1980)
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Joined: 4 years ago
Posts: 146
Topic starter 28/11/2022 7:12 pm  
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 Derek M
(@derek-m)
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Joined: 5 years ago
Posts: 4425
28/11/2022 7:31 pm  

Posted by: @craig1980
↑
  • @derek-m I didn't set them back to 21 straight away and left them for a day. At night it was longer between but by the next day it was back to the same. 

Had the indoor temperature changed? A further test would be to watch closely the operation of the wireless receivers for the thermostats when the system performs its short off - on cycle.

Also check that all the plug and socket connections on the circuit board are making good contact.

 



   
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 Craig1980
(@craig1980)
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Topic starter 28/11/2022 7:47 pm  

@derek-m no change in the indoor temperature. The lights on the receivers do not change when it cycles on and off.



   
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 Derek M
(@derek-m)
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Joined: 5 years ago
Posts: 4425
28/11/2022 7:59 pm  

Posted by: @craig1980
↑

@derek-m no change in the indoor temperature. The lights on the receivers do not change when it cycles on and off.

Did you close the airing cupboard door overnight? The reason I ask is that sometimes equipment, and circuit boards, can suffer intermittent faults due to thermal expansion.

What water law settings are applied at the moment?

 



   
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 Craig1980
(@craig1980)
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Topic starter 28/11/2022 8:23 pm  

@derek-m the airing cupboard door is always shut. It doesn't get that warm in there. 

Pics of the screen set up of water law. 

Not sure if the set up with "floor" is correct. Whether it should be  FCU instead?

Also running -2 on the home screen which I'm led to believe is a short cut to adjusting a water law setting. Assuming the 31? 

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 HughF
(@hughf)
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Posts: 489
28/11/2022 9:56 pm  

Posted by: @derek-m
↑

@hughf

Yes, I've seen all the different diagrams in the manuals, but it doesn't tell one which is correct. Also I don't see the point in having two pumps to do the job that one pump should be able to do.

I’d go with the one from the Jule installation manual, as it’s a Jule cylinder/heatpump package. Now that we’ve seen some more photo’s you can clearly see that the hydraulics match what is shown I their manual exactly.

 


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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 HughF
(@hughf)
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Joined: 4 years ago
Posts: 489
28/11/2022 9:59 pm  

Posted by: @derek-m
↑

Hi Hugh,

Do you know if the Samsung controller will still use WC when operating with the indoor temperature located within the controller?

I have a lot of time for Glyn Hudson over on YouTube who has just DIYd his 5kW Samsung install and has documented it with a decent video. From the comments I’ve been having with his, he says that the Samsung will still use WC when the wired controller is used as for measuring room temperature. I’ve asked him if the controller will also support load compensation and reduce the flow temperature when the room is approaching the target temp. Inversely, increasing the flow temp to recover quickly from a nighttime or away/holiday mode setback temperature.

He uses a single pump (with PWM control) on his setup but his primary pipe work is short.

 


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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 HughF
(@hughf)
Honorable Member Member
Joined: 4 years ago
Posts: 489
28/11/2022 10:35 pm  
8E90DC97 F673 4F72 B83B 9F9B4B9D131C

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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 Craig1980
(@craig1980)
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Joined: 4 years ago
Posts: 146
Topic starter 28/11/2022 10:47 pm  

@hughf thanks for looking in to this.



   
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 Derek M
(@derek-m)
Illustrious Member Member
Joined: 5 years ago
Posts: 4425
28/11/2022 11:02 pm  

@craig1980

Let me have a read through the manual and decipher what some of the descriptions mean. I'll get back to you tomorrow.



   
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 Craig1980
(@craig1980)
Estimable Member Member
Joined: 4 years ago
Posts: 146
Topic starter 28/11/2022 11:13 pm  

Great, thanks. This is all very helpful 



   
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 HughF
(@hughf)
Honorable Member Member
Joined: 4 years ago
Posts: 489
28/11/2022 11:53 pm  

Glyn has his 5kW Samsung wired/plumbed up with full monitoring, the data can be viewed at:

https://emoncms.org/samsung5kw

Single grundfos PWM pump, a heatpump cylinder with a 1m2 coil (the same cylinder I’ve got - they were cheap on eBay back in the summer), and radiators throughout.


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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