Those who are using a head pressure controller to modulate blower speeds based on plenum temps.

[JRHAWK9]

I'm just curious as to what voltage you all are sending the blower at blower cutoff? I aimed for 65VAC, but there are times my snap switch cuts power when I'm at about 63-64 VAC. Just curious as to what others are using for their cutoff voltage. FYI, one needs a true RMS meter in order to correctly meter the voltage coming out of the controller. If not using a true RMS meter, your readings will not be accurate. This has to be how the controller is rectifying the signal.

http://en-us.fluke.com/training/training-library/measurements/electricity/what-is-true-rms.html

PS...I'm LOVING this variable speed setup!!

 

[JRHAWK9]

@brenndatomu

I know there are a handful of you running this setup on your Tundra's. What is your cutoff voltage?

 

[brenndatomu]

@brenndatomu

I know there are a handful of you running this setup on your Tundra's. What is your cutoff voltage?

65-70...I'll need to look again...

 

[DoubleB]

@brenndatomu

I know there are a handful of you running this setup on your Tundra's. What is your cutoff voltage?

For the record I've deactivated mine. I wired up a pretty complicated system so that it was fail-safe if the var spd failed, and as a result it doesn't work as well as I hoped. I might redesign it (a 3rd time) if I get ambitious, but not in the foreseeable future.