Posted by: @iantelescope

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 That would imply that I  cannot use Weather compensation without also using a Physical Thermostat

Sorry but I simply don't believe that.  Interpreting Samsung's language is difficult I concede,.

Clearly for wl to work there must be an external temperature sensor.  But equally clearly there is no need for an internal one.  Furthering if a third party thermostat were required Samsung would provide a spec.  

I will take a look much later but no way di I believe that a third party thermostat is required for wl to work 

@derek-m 

Yes derek that is my desired end game,

but, ...............from experience over two years ...................at what cost ,where?

Posted by: @iantelescope

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On my Samsung the Thermistor on its own does not work with the Radiator motor still being controlled by an essential physical Thermostat!.

Thats because of how your installer wired it IE wrongly.

Looking at the charts, I suspect that your heat pump was only running the primary water pump but not the compressor, but without being able to observe the process I cannot say for certain what appears to be happening.

@jamespa 

In itself , the Samsung Weather compensation , aka Water law  is excellent , with my water temperatures following the Water Law graphs perfectly .

As the French Samsung engineer said , the Water Law , WL , Weather compensation will save about 7 to 10% of your running costs .

In my experience , an accurate estimate.................

My installer complained that Samsung had not supplied a Thermostat , ( along  with several other components) in the initial package.

The Thermostat appearing some three weeks after the start of the installation.

Certainly My Heat Pump , currently will not work without a Thermostat to switch the Radiator motor ON.

currently , a Heat Pump that will not provide heat without a Thermostat!

@jamespa 

Thermostat Wiring:

The Physical Thermostat wiring was done by Telford under the instructions from Samsung,  not , for once, by my "installer".

The External Physical Thermostat has two connections :

1) starting the Radiator , Secondary water loop motor.

and

2) Connected to the RUN input terminal , the Physical Themostat starts  the Compressor Running.

This , with the WL Thermostat is the logical OR given in the 2091/2092/2093 options 2, 3 or 4 .

Certainly , currently, my Heat pump will not heat without a Physical Thermostat.

Other Samsung s will be different however.

Posted by: @iantelescope

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Certainly My Heat Pump , currently will not work without a Thermostat to switch the Radiator motor ON.

currently , a Heat Pump that will not provide heat without a Thermostat!

Once it is replumbed there won't be a radiator motor, there will be only be one motor switched by the heat pump.

Posted by: @iantelescope

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2) Connected to the RUN input terminal , the Physical Themostat starts  the Compressor Running.

This , with the WL Thermostat is the logical OR given in the 2091/2092/2093 options 2, 3 or 4 .

Certainly , currently, my Heat pump will not heat without a Physical Thermostat.

Other Samsung s will be different however.

This needs to be reworked, either by changing the fsvs or by rewiring, so that the thermostat is not necessary.  Then the heat pump can use it's own temperature sensor to decide what to do.  I don't have time to look at this now but perhaps you do.  I'm at least 95percent sure you don't need a thermostat and that you can use the internal sensor which is designed for the job unlike any third party component.

@derek-m 

Hopefully, @derek-m I will have another series of Cloud cloning spectaculars this winter.

My point was , however, no matter what was happening, it was unobserved , happening in the middle of the night , and  consuming no energy!

The large amount of heat was either coming from the Hot Water tank , a perfectly valid alternative , or, from the Buffer tank.

The clouds cost nothing! The Heat Pump was saved!

My further point is that the Buffer tank , initially required by Samsung-Dallium , later required for de-icing duties appeared to work!

Alternatively , the Hot Water tank , which can also dump hot water into the Heat Pump during de-iceing incidents may  also have worked!

Either way , somebody got it right!

All noted.  Can you post the version of the controller manual you have please so when I look at fsvs there is less scope for confusion

The heat for deicing comes from the system whether it is the house, buffer tank or pipework.  It has to be replaced when the heat pump starts working again, so its not free (nothing is free In thermodynamics).  In your case, unless the radiator motor is forced on during deicing (by what?) then, unless there is also a call for heat from your thermostat, the radiator motor will be off and, as @ derek-m says, only the primary circuit will contribute heat.  Anyway that is now in the past.

It seems to me there is a case for an arrangement of valves so that a buffer tank supplies the deicing heat, not the house, which is recharged when the pump is back in heating mode.  I've not seen this in a diagram though, perhaps someone else has.

Can you post the version of the controller manual you have please so when I look at fsvs there is less scope for confusion.

@jamespa @Mars 

Gremlins return !!

Sorry @jamesPa and @derek-m , the gremlins have returned ...................... I may , again be cut off .

RSVP

@jamespa I can easily allow for a option to try and operate without a Thermostat.

I Do , however , want to see and Control the Water Law Thermostat .

My other requirement is to stop this expensive Winter Journey:

Posted by: @iantelescope

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I Do , however , want to see and Control the Water Law Thermostat .

The water law thermostat as you call it is the external temperature sensor and the internal sensor measuring the lwt.  You cant control either, they only measure things.  What you can control is the water law itself. 

In addition it's clear that the temperature sensor inside the wired remote can have a  function (other than just reporting it) if the fsvs are correctly set.  It's not clear what but I strongly suspect it's temperature limiting.  This would be logical and would trigger a tweak in the best methodology for setting up the water law curve.  I will explore further once you post your version of the manual.

Posted by: @iantelescope

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My other requirement is to stop this expensive Winter Journey:

 

You will get a similar shape curve for certain.  The expectation is that it will be lower however, but the shape won't change materially because that's the weather.  Unless you have connections much more senior than any I have, control of the weather is not within your gift.

Can you post the version of the controller manual you have please so when I look at fsvs there is less scope for confusion.

@jamespa 

Sorry , @jamespa  the gremlins have struck cutting your message in half!

Can you try again?

Manuals:

I do not have a software copy of the manuals for my Heat Pump for my exact type of heat pump ,but ,

I have the old , 2013 set of manuals.

I have a newer , probably better , more up to date version , undated .

I have a software newer generation 6 manual  which do not quite apply  to my Heat Pump ..

ian