This is my 1st post at this forum. I regulary checked it before, to set up my enitre velbus system. Thanks a lot for all the topics by the way
Allthough there are a lot of topics concerning heating, I couldnât find the answer I was looking for.
I have a Junkers condensing boilers. This one is in charge of my floorheating on the groundfloor and for the radiators on the top floor.
So there are 2 pumps in the boiler whom each control 1 system (1 for floorheating and 1 for radiators).
The Junkers thermostate is placed in the condensing boiler, therefore the heating of the groundfloor is controlled by a wheater depending system (sensor attached at the exterior of my home), while the radiators (pump group 2) is controlled by my actions.
The pump for the radiator is linked with a VMB4RYNO relay. The Junkers technician told me to do it this way.
The supply of hot water of every radiator is connected with a VMB4RYLD relay. When one of the relays is activated, the corresponding supply of hot water is triggered.
In every room I have the VMBGPODW led touch panel, with integrated thermostate. I want them to communicate with the VMB4RYLD relay. How can I set this up?
For example: I want the rooms heated in the evening from 7pm till 10pm to 22 degrees Celsius. But I also want to have the option to put the heating on via an action on the VMBGPODW.
I think it is important to activate the pump of the boiler only when i need heating. otherwise my pump is constantly
Heating control in Velbus is not complicated at all.
What you need to do is to make the following connections in Velbuslink:
double-click on the âheaterâ-channel of the VMBGPOD, or drag it onto the relay of the radiator. Make the following action. Initiator: âHeaterâ; subject: relay channel of the radiator; action: âMomentâ (nr.1)
in a similar way, connect the âPumpâ channel of the VMBGPOD to the relay of the central heating pump, action: âmomentâ.
Basically, thatâs it.
You can set the target temperatures for day, night etc. by right-clicking on the VMBGPOD > Configure module > tab âtemperatureâ. There you can also configure programs (under âprogram stepsâ). If you use programs, donât forget to activate the program in question: in the âprogram stepsâ window, when Velbuslink is connected to your installation, youâll see the option âactive programâ.
For manual command, connect buttons to the âTemp.sensorâ channel of the VMBGPOD. For instance: initiator âbutton 1â, subject âtemp.sensorâ, action ânight modeâ.
You probably didnât assign an address to the thermostat. Right-click on the VMBGPOD > Change address. Assign an address (different from 00 and FF) to âthermostatâ and click on âChangeâ. Now the thermostat channels should appear.
Another question on the same topic. I managed to set up my thermostates as you explained.
My Junkers thermostate (which is placed in the condensing boiler) has its own programme for the moment to activate the boiler itself. Is this still necessary?
Or can i just put the Junkers thermostate in ânight modusâ and then let the heating system work purely on the Velbus thermostates?
Because when i put my Junkers thermostate constantly in heating modus, my boiler will constantly make hot water, regardless if i require warmth as asked by my Velbus thermostates. In that case the boiler is producing warmth, but my pumps are logically closed because i donât ask for warmth in my radiator (via Velbus).
Obviously when my Junkers thermostate is constanly in heating modus, this will be not economic/ecologic at all.
As I understood from your first post, your boiler also serves for your groundfloor floorheating. In that case letting Velbus turn it off is not an option at all.
In any case, whether or not your boiler needs its own control system is something you will have to see with your central heating installer or Junkers, Iâm afraid. We canât give advice on that, itâs outside of Velbus scope really and depends on many other factors.
In general, Velbus can pilot input relays on your central heating system, and take in output relays (tension free) as triggers. How, what and when these should be piloted or pilot, has to be seen according to your central heating system and by experts in that field.
