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12kW Samsung gen 6 short cycling

 
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Air Source Heat Pumps (ASHPs)
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 Craig1980
(@craig1980)
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Topic starter 26/11/2022 3:07 pm  

@derek-m sure. It's a Joule tank, Samsung gen6 wired remote and here's an image of the sticker on the outside unit. 

 

Anything else you need? 

20220919 185802

 


   
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 Craig1980
(@craig1980)
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Topic starter 26/11/2022 3:41 pm  

@derek-m also, Freedom didn't fit my system. Consumer energy solutions did.


   
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 Derek M
(@derek-m)
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26/11/2022 4:02 pm  

@craig1980

Below is an extract from the MIM-E03CN manual, which is the recommended controller for use with your heat pump.

Wiring works
Connection guide of additional pump
Case 1) INV. pump
Connect the PWM control external type pump to PWM terminal block and power cable to the external contact terminal
 
I would suggest that you ask your installer why he did not fit the type of water pump that should be used with your heat pump.
This post was modified 3 years ago by Derek M

   
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 Craig1980
(@craig1980)
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Topic starter 26/11/2022 4:13 pm  

Okay, that's another question for them. Thanks 


   
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 Derek M
(@derek-m)
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26/11/2022 4:24 pm  

@craig1980

Do you only have the one water pump?

Is your system still short cycling at the same frequency?

One possible problem could be incorrect settings within the controller. If possible go into the installer menu and make a note of any parameter settings that you can find, and then post the results.


   
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 Craig1980
(@craig1980)
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Topic starter 26/11/2022 4:31 pm  

@derek-m I have two pumps I believe. You can see both pumps in this pic. 

I am still getting short cycling, yes. 

What settings do you mean, sorry? 

It's entirely possible the settings are incorrect, I've had to wing it to get as far as I have. 

received 830198528323080

   
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 Craig1980
(@craig1980)
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Topic starter 26/11/2022 4:31 pm  

Both pumps are the same btw


   
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 Derek M
(@derek-m)
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26/11/2022 5:13 pm  

@craig1980

What is the temperature setting of the two thermostats, and what is their make and model?


   
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 Craig1980
(@craig1980)
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Topic starter 26/11/2022 5:16 pm  
20221121 174801

https://www.mrcentralheating.co.uk/neomitis-wireless-rf-7-day-programmable-digital-room-thermostat-white?gclid=Cj0KCQiAj4ecBhD3ARIsAM4Q_jFgjdz2X5_2SP7-EqQRHiqnP7_pnTe5G3LJB7QW34Z2sFOSvZbEh0EaAjp1EALw_wcB


   
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 Derek M
(@derek-m)
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26/11/2022 5:20 pm  

@craig1980

Turn both thermostats up to 25C and see if this has any effect on the cycling.


   
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 Craig1980
(@craig1980)
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Topic starter 26/11/2022 5:25 pm  

@derek-m okay, I'm not at home at the moment. I'll do it later and report back. I've made various adjustment to water law which is Samsung for WC. The temp in the house is nice and the COP is acceptable too. Just the cycling. Thanks again


   
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 HughF
(@hughf)
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Posts: 489
26/11/2022 6:50 pm  

The Joule Samsung instructions are available on line, they don’t use a PWM pump. They have a separate interface PCB that comes after the MIM. I’ll see if I can find a link.

I would be inclined to get the installer to wire/plumb it up as per the Midsummer wholesale instructions that give details on how to fit a PWM pump and use the Samsung controller as the room stat.

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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