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12kW Samsung gen 6 short cycling

 
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Air Source Heat Pumps (ASHPs)
Last Post by iantelescope 3 years ago
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 Craig1980
(@craig1980)
Estimable Member Member
Joined: 4 years ago
Posts: 146
Topic starter 29/11/2022 8:00 pm  

But at the beginning of the 8 min cycle they are both within 0.5 degree of each other at 22



   
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 Craig1980
(@craig1980)
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Topic starter 29/11/2022 8:22 pm  

Outside unit heat pump fans run for around 5 mins then it's quiet until 8 mins and 20 seconds then it starts again. 



   
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 Derek M
(@derek-m)
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Joined: 6 years ago
Posts: 4425
29/11/2022 9:13 pm  

@craig1980

I will have a look at the data and get back to you tomorrow.

In the meantime, with the system running, measure the temperature in the central section of each radiator at both the top and the bottom, along with the relevant room temperature.



   
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 Mike H
(@mike-h)
Reputable Member Member
Joined: 5 years ago
Posts: 200
30/11/2022 11:21 am  

Posted by: @transparent
↑

Let's label a few bits:

-- Attachment is not available --

Am I right in thinking that Craig's system (from Joule) does not have a buffer tank? I'm still trying to get my head round the mandatory buffer tank for Samsung ASHP question.

 

 



   
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 Craig1980
(@craig1980)
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Topic starter 30/11/2022 11:57 am  

@mike-h I have two small tanks above the uvc but I'm assuming they aren't buffer tanks? I have a cold water header tank in the loft and the system outside. That's all I have so unless one of those two tanks are a buffer then I don't have one.

20221128 101025


   
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 Derek M
(@derek-m)
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30/11/2022 4:19 pm  

@craig1980

Did you measure and record the radiator temperatures?



   
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 Craig1980
(@craig1980)
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Topic starter 30/11/2022 4:20 pm  

@derek-m nearly done. Doing it now.



   
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 HughF
(@hughf)
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Joined: 5 years ago
Posts: 489
30/11/2022 4:34 pm  

Posted by: @mike-h
↑

Am I right in thinking that Craig's system (from Joule) does not have a buffer tank? I'm still trying to get my head round the mandatory buffer tank for Samsung ASHP question.

 

It doesn't have a buffer, no...

Which set of instructions say that the samsung needs a buffer?

 


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: 5 years ago
Posts: 489
30/11/2022 4:35 pm  

Posted by: @craig1980
↑

@mike-h I have two small tanks above the uvc but I'm assuming they aren't buffer tanks? I have a cold water header tank in the loft and the system outside. That's all I have so unless one of those two tanks are a buffer then I don't have one.

-- Attachment is not available --

The white one is the expansion vessel for the domestic hot water (from the unvented cylinder) and the grey one is the expansion vessel for the heating/ashp circuit.

As you have an unvented cylinder, there is no need for any tanks in the loft, and also no need for that shower booster pump. I'm not sure why you still have those in your installation.

 


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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 Derek M
(@derek-m)
Illustrious Member Member
Joined: 6 years ago
Posts: 4425
30/11/2022 4:45 pm  

@craig1980

Below is a link for the controller instructions. Select the home screen and monitor the outdoor temperature whilst your system goes through its cycling process.

DOWNLOADCENTER.SAMSUNG.COM "https://downloadcenter.samsung.com/content/UM/202007/20200729135932592/DB68-08470A-03_IB_EHS_Wired_Remote-Control_Kit_EU_Wing_EN_200121.pdf"



   
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 Craig1980
(@craig1980)
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Posts: 146
Topic starter 30/11/2022 4:46 pm  

@derek-m here you go. Thanks 

 

20221130 164611


   
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 Craig1980
(@craig1980)
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Posts: 146
Topic starter 30/11/2022 5:00 pm  

@derek-m outdoor temp remains the same through cycling process at 6.7 degrees



   
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