This summer I installed a Glow-worm Flexicom 18hx, with Climapro and Smart Wiring Centre. I initially had some problems with bugs in the Climapro software, which were fixed when Glow-worm replaced it free-of-charge with an updated version.
One of the things that impressed me with the operation of my system was the way in which the Climapro modulated the boiler water temperature downwards as the temperature in the room approached the set room temperature. This resulted in no overshoot, and a very closely controlled comfort temperature in the room.
I was recommended to add an outside temperature sensor so that the system could move to an even better level of control and efficiency. This I did, but am rather disappointed in the result.
I understand that the idea behind weather compensation is that the controller will use a lower boiler water flow temperature if the outside temperature is reasonably mild, and will only use the maximum boiler temperature (say 82 degrees) if the outside temperature is very low (say –5 degrees). You set this by selecting a heating curve or gradient at the Climapro. This should improve the efficiency of the boiler operation by only using the highest flow temperatures when really needed.
So far so good, and yes it is clear that the boiler is not using the highest flow temperatures – the outside temperature has yet to drop low enough.
However the system seems to have become a lot more dumb with respect to the set room temperature. As far as I can tell there is now no modulation downwards as the room set temperature is approached, with the result that I now get overshoot. Also the Climapro doesn’t seem to fire up the boiler until the room temperature has dropped significantly. It now seems to be behaving like a simple on-off thermostat.
It seems to me that the addition of the outside sensor, whilst adding some intelligence regarding the maximum flow temperature, has removed the previous intelligent modulation with respect to the set room temperature. These two features ought to be working together to maximise efficiency, but the one seems to have just overridden the other. Does anybody out there know whether this is supposed to happen, or whether this is a fault, and if there is a fix?
One of the things that impressed me with the operation of my system was the way in which the Climapro modulated the boiler water temperature downwards as the temperature in the room approached the set room temperature. This resulted in no overshoot, and a very closely controlled comfort temperature in the room.
I was recommended to add an outside temperature sensor so that the system could move to an even better level of control and efficiency. This I did, but am rather disappointed in the result.
I understand that the idea behind weather compensation is that the controller will use a lower boiler water flow temperature if the outside temperature is reasonably mild, and will only use the maximum boiler temperature (say 82 degrees) if the outside temperature is very low (say –5 degrees). You set this by selecting a heating curve or gradient at the Climapro. This should improve the efficiency of the boiler operation by only using the highest flow temperatures when really needed.
So far so good, and yes it is clear that the boiler is not using the highest flow temperatures – the outside temperature has yet to drop low enough.
However the system seems to have become a lot more dumb with respect to the set room temperature. As far as I can tell there is now no modulation downwards as the room set temperature is approached, with the result that I now get overshoot. Also the Climapro doesn’t seem to fire up the boiler until the room temperature has dropped significantly. It now seems to be behaving like a simple on-off thermostat.
It seems to me that the addition of the outside sensor, whilst adding some intelligence regarding the maximum flow temperature, has removed the previous intelligent modulation with respect to the set room temperature. These two features ought to be working together to maximise efficiency, but the one seems to have just overridden the other. Does anybody out there know whether this is supposed to happen, or whether this is a fault, and if there is a fix?