I have just installed a Vera edge (UI 7 ) in our business building to control the heating , which consists of two large areas. The heating source is an oil boiler…with water pumped to large ceiling fan assisted blowers / heat exchangers in each area.
I have fitted an on / off relay on the boiler and each of the two blowers / fans. Previously all these three were switched by independent mechanical electrical timer switches. which was totally inadequate as there was no feedback on temp , in fact no temp control in the heated areas at all.
I have added a room thermometer to each of the two heated areas ( Secure SES301 )
I have added a Fibaro multi sensor in the boiler room with a thermometer on the boiler water out / returns temp / outside temp etc.
All these components work fine, but I am having difficulty with some scenes.
I am having no problem with a single sensor , or time schedule as a trigger…switching a device…but
I am having difficulty where I want two triggers to be satisfied (AND ) , before a device is switched.
For example, I only want to turn on the blower fan, when the temp in that area is below 13C AND the boiler out temp (circ water) is above 60C…so that I do not have the blower on while cold water is circulating thru the heat exchanger.
So I selected the room stat as a trigger and set it for temp below 13C & selected boiler out temp as trigger above 60C…but the associated device (relay switch) is switching on once the temp below 13C condition is satisfied…whereas I want it to wait until the boiler out temp condition of 60C is also satisfied.
When setting up the scene , I went into advanced editor and selected…“when ALL devices…” instead of “when any…” as I thought that might be selecting AND instead of OR…buy no joy yet.
Im hoping that I can achieve this within Scenes…and that I do not have to delve into more in depth Logic programming at this stage.
Any suggestions please…
Many Thanks
Tom