KNX/EIB Merten RTR 624944 Push Button

[Warichet]

Hi,

I've a Merten RTR 624944 in each room.
I'm very happy with those devices, no problem, but I don't understand how the Push Button is working.
My application is in english, and the meaning is not obvious.

The behaviour I have:

When the RTR has been set (HS & UZSU) to StandBy mode, I hit the PB and the status changes to Comfort mode. Fine !

When the RTR has been set (HS & UZSU) to Comfort mode, I hit the PB and the status doesn't change. Nothing happens.
Is this normal ? I guess it is not. I've tried several combinaisons but got tired of guessing.
Any hint please ?
Also, I can only toggle between Comfort ans StandBy (not to Night) is that correct ?

Thank you.

[MatthiasS]

The button normally is called "comfort extension". The function was based on requirements in office building, when people wanted to have the office room heated even after the central clock had sent the room to night mode (working after official business hours).

The extension is normally limited to a certain amount of time, e.g. one hour.

The same in a private house: Normally at eleven o clock the RTR goes to night mode, but you want to see the end of the movie without freezing and with this button you can extend comfort mode for a certain period.

On many RTRs you can change the behaviour of the button: from comfort extension to transparent mode. In this case you will find a separate object for the button and you can use it (with HS) as a toggle for anything else, if you want.

[Warichet]

Hi Matthias,

Thank you for this detailed explanation.
I had read the doc, but it is only now that all pieces of the puzzle fit together

On many RTRs you can change the behaviour of the button: from comfort extension to transparent mode.

I've checked all the options again, on the 624944 there is no KO for transparent mode (it's rather me who is KO ). If I get you right, this behaviour is due to the application, hence it can be changed with un update.
I'll try Merten's TechSup, those guys have already done miracles for me (maybe one more !)

[Warichet]

On many RTRs you can change the behaviour of the button: from comfort extension to transparent mode. In this case you will find a separate object for the button and you can use it (with HS) as a toggle for anything else, if you want.

I've questioned Merten's TechSup about the button behaviour, and got a clever reply

Perhaps you are able to solve this problem by connecting the button object (4) to your clock instead of the comfort object (0). Now clock and button have the same priority.

If I got it right, now it should be possible to toggle back from Comfort to StandBy .
I'll try soon