Temperature Monitoring with a Ducted Minisplit System
Just curious if anybody here has a Fujitsu ducted HVAC unit, either mid-static or multi-position air handler, and has a temperature logger near the thermostat? If so could you post a screenshot of the temperature logger data during a period of a relatively constant heating or cooling load on the Fujitsu?
For comparison, attached is a picture of a temperature logger for my Trane XV18. Setpoint is 68 so the thermostat temperature sensor (or the sensor in my temp logger) might be off by a little bit. But the thing that interests me is that it maintains the temperature within a pretty small range over pretty long time periods if the load is not changing a ton, which I really like.
Don’t have a screenshot immediately available, but my Mitsubishi ductless unit has a much higher spread of about 2-3 degrees, even when subjected to a pretty constant load.
Just curious to see what other systems — especially Fujitsu’s ducted systems — are able to do in terms of maintaining a steady temperature while modulating.
Thanks for any input. And I suppose I’d be curious to see temperature logger results for just about any system, so owners of non-Mitsubishi’s feel free to post your results as well!
Edit: Oh, and would also be curious to see what happens during defrost cycles. My Trane’s backup heat strips kick on during defrost, but even so, the temperature will usually drop 0.2 or 0.3 degrees lower than it’s normal modulating range during defrost, and then it will overcompensate by 0.2 or 0.3 degrees when recovering. The attached picture does not show a defrost cycle.
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