Were it my machine, I would delta-t between coolant leaving the radiator and ambient room temperature to control the radiator fans.
- radiator out from your high flow next for temperature leaving the radiator
- taped outside case temperature sensor for ambient room temperature
- connect the 6 radiator fans to fan ports 1 through 6 on the octo {case exhaust fan to fan port 8}
- make a delta-t virtual sensor in the Playground (delta-t.jpg)
- make a fan controller curve for fan port 1 using the delta-t virtual sensor to drive it (radfan1.jpg)
- copy fan ports 2 to 6 from fan port 1 {all fans will perform the same} (radfan2-6.jpg)
You can do a similar thing for the case exhaust fan using a delta-t between the case and your taped outside sensor.
Hint: set the octo's controller for fan port 7 to a 'Power preset' controller, and set the power to zero to keep from getting a 'Low RPM' error message. (
noerror.jpg)