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Danfoss issue / heating

Jan Kocovski shared this problem 9 years ago
Known

Hi there,


i am new to zipabox and currently testing a few things. I plan to use in total 9 Danfoss Valves where i already included 5 fpr testing purposes into the network.


I am experiencing some strange things where i don`t understand if this is a mind problem between my ears or a real issue.


Let`s start with the first room:

1 Danfoss Valve

1 fibaro magic eye


I´ve set Danfoss valve in the climate widget as Output Device in the heating tab. At thermometers Tab i`ve set the magic eye and added "minimum" as the value. Even if i don`t understand this value but even if i change it nothing really happens.


Pls see attached screen shot.


The Thermometer measured in the room at 21.8 celsius. see 2. screenshot.


Unfortunately at the climate widget the temperature is 23.2 celsius...at least this is what stated on top of the widget when looking at the climate zone.


this was the first thing i don`t understand.


The second is:

At edit thermostat i`ve changed the values to much less at it is per default. see another screenshot.


My thoughts are that this is the temperature i want to have in the the room. so for today i have the night program running an it is set to 12.2 celsius. so even if it is 21.8 celsius in the room, which is the value from the thermometer, the radiator is running is producing heat.


In my opinion the radiator should be totally cold as there is no need for heating because of more than 9 celsius over the set value.


Or did i just thing the wrong way?


there is no error in communication between thermometer and valve and the zipato box is working with the newest software.


Actually i am totally confused because i don`t understand this behavior and this is a major problem to me. As of today i cannot control the valves the way i want to.


To be more precise:

I want the radiator to be off when the temperature is much higher as set. It would be nice to have something like:

if the room temperature is higher as the set value for the valve stop heating.


Is this just a understanding issue i personally have or did i configured something the wrong way?


Your help will be rally appreciated. thank you very much in advance.


cheers,


--jan

Replies (8)

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2

Hi Jan,


I own a Danfoss Living Connect (model 14G0012). The only thing Danfoss did with this product was making it z-wave enabled with the setting SET_TEMPERATURE. There is no feedback from the valve to the z-wave system for valve status, and measured temperature.


The SET_TEMPERATURE action is a kind of remote function for the up and down buttons on the valve itself.


Behavior example:


When you set the thermostat widget to 21 degrees and the temperature measured by the Fibaro sensor is 20 degrees you think the valve starts heating, but that is not the case.

By setting the temperature to 21 degrees the valve receives a SET_TEMPERATURE of 21 degrees. If the temperature sensor of the valve measures 21 degrees nothing happens, despite the widget says that it's heating.


Well, to cut a long story short: The Danfoss valve is a disappointment!


I made a workaround with two rules (heating on and heating off and a virtual switch).


The output of the climate widget is a virtual device witch triggers two rules.


By setting the SET_TEMPERATURE 3 degrees higher (last line in the rules) than the temperature set in the climate widget I now for sure that the valve starts heating.

When the desired temperature is reached in the climate widget turns the virtual device off witch triggers the rule heating off. The SET_TEMPERATURE of the valve is set 17 degrees.


I hope this information is useful for you.


Greetings Theo

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1

Hi Jan


to your comment:


<<By setting the temperature to 21 degrees the valve receives a SET_TEMPERATURE of 21 degrees. If the temperature sensor of the valve measures 21 degrees nothing happens, despite the widget says that it's heating.

Well, to cut a long story short: The Danfoss valve is a disappointment!>>


Are you sure this is also the case if you use a virtual thermostat including the valve and a thermostat device?

This would be the biggest joke I've ever seen...

Thanks for your reply.

kind regards

Beat

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Yes, the valve is only receiving SET_TEMPERATURE and has its own temperature sensor. There is no feedback from valve to controller. I sold mine a while ago, and switched to dedicated net powered valves with Nest thermostats. I also sold my Zipato box. Now a VeraPlus is controlling my home.

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Dear Theo,

thank you very much for the detailed reply. Wow, i thought the Valve would be a good choice and now i have to question my invest a little bit. I`ve already bought 9 of it ^^


Anyway...if i could get a workaround up and running this would help a little bit. My major Problem is the the valve is continuously heating, no matter what i do.


However i tried to implement the rules you`ve sent as screenshot but i struggle somehow. I would like to raise a few more questions:


- I guess the valve_position is not a Danfoss parameter and therfor i don`t need it?

- what means the "http verwarming status" and how to add it?


So in summary if i understand your rule correctly you are not using a desired thermostat or is this the trigger from the climate widget?


Sorry for asking maybe stupid questions but i just try to understand correctly to don`t run into more issues as i already have.


Thank you very much in advance for your help.


cheers,


--jan


Theo van den Dolder wrote:

Hi Jan,


I own a Danfoss Living Connect (model 14G0012). The only thing Danfoss did with this product was making it z-wave enabled with the setting SET_TEMPERATURE. There is no feedback from the valve to the z-wave system for valve status, and measured temperature.


The SET_TEMPERATURE action is a kind of remote function for the up and down buttons on the valve itself.


Behavior example:


When you set the thermostat widget to 21 degrees and the temperature measured by the Fibaro sensor is 20 degrees you think the valve starts heating, but that is not the case.

By setting the temperature to 21 degrees the valve receives a SET_TEMPERATURE of 21 degrees. If the temperature sensor of the valve measures 21 degrees nothing happens, despite the widget says that it's heating.


Well, to cut a long story short: The Danfoss valve is a disappointment!


I made a workaround with two rules (heating on and heating off and a virtual switch).


The output of the climate widget is a virtual device witch triggers two rules.


By setting the SET_TEMPERATURE 3 degrees higher (last line in the rules) than the temperature set in the climate widget I now for sure that the valve starts heating.

When the desired temperature is reached in the climate widget turns the virtual device off witch triggers the rule heating off. The SET_TEMPERATURE of the valve is set 17 degrees.


I hope this information is useful for you.


Greetings Theo

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Mh, ok... i guess i`ve changed my mind. It seams to me the stellaZ might be the better solutions so i will send back 9 Danfoss i buy 9 szellaZ.

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Jan Kocovski wrote:

Mh, ok... i guess i`ve changed my mind. It seams to me the stellaZ might be the better solutions so i will send back 9 Danfoss i buy 9 szellaZ.
The StellaZ also has te be controlled by rules, I made a manual for this one.

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Hi Theo,


ok, where could i find the manual for it?

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lovely... Thank you Theo!!!

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The problem here seems then to be the calibration of the Danfoss temperature sensor compared to the room sensor. I note that the Configuration of the Danfoss sensor has a Temperature offset setting. Would this assist?

/Marcus

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