2 Linked Heating Devices driving one Heating Switch

[rvorsten 0]

Hi -

I have multiple heating zones and one central heater device. Each zone has zwave thermostat valves and a temperature sensor. My intend is that each room can ask for heat, and therefore switch on the central heater.

However, is more than one zone control the same heater switch and one rooms, then the heater switch starts toggling:

Zone 1: heating yes / Zone 2: heating no: heater every minute goes on/off/on/off/on/off etc.

What I would like to see is an 'OR' logic. If any one of the heating zones asks for heating, then keep the heater on.

I'm currently running 1.047 but also tried this in 3.424. Same result. Work-around is to use multiple (hardware) switches in parallel, but with 5 zones (and counting) that becomes pretty expensive and is an ugly solution as well.

I have been thinking about building a virtual device to hold the logic but currently have no clue how to start that.

Lot of questions here:

Anyone every seen this too?

Anyone ever come up with a solution?

Anyone an idea how to build the virtual device for this?

Is this functionality on the roadmap at all?

Thanks!

Ronald

[rvorsten 0]

But with that solution, I can't use the ipad app or other apps anymore to manage my temperature.

Sure you can still use all iDevices to change the temperature! This solution 'only' replaces the linked devices that normally control your heater, offering the OR statement which we all so dearly miss. The heating panel still controls the requested temperature and (in my case) therefore also the set values for my Danfoss radiator valves.

The LUA script polls the Danfoss set values, compares these with the temperature readings of the room (offering an easy way to correct for reading inaccuracies on the side!) and if Danfoss is set to higher than the actual temperature in the room, it switches on the heating. Makes sense?

If not, pm me.

Ronald

[hvb83 1]

Yeah, with that script you can continue to use your heating panel and interfaces as normal. It just adds a couple of advantages, like multiple heating zones on one relay, offset control and switching on the relay in case you manually set the setpoint on your valve.

As suggested the script does exactly what you need without any drawbacks. If you need any assistance just let me know.

[remcoploeg 10]

Ronald, thanks for the explanation. I will give it a try

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