XV95/TCON803 Question

[dancaselr]

Is there a way to get some feedback on the TCON803 t'stat that shows if the furnace is in first stage or second stage?

Thanks!

D.

[BaldLoonie]

Not designed that way anyway.

[SkyHeating]

You need to upgrade to an XL950 and 24v kit for that.

[dancaselr]

For the record, I found my answer in the installation instructions for the TCONT803.

In non-Heat-Pump installations, the F terminal is normally not used (it's used for emergency heat in a heat pump). As long as the TCONT803 has the 24V common run to it, the F terminal can be used for a variety of signalling functions using the red LED on the front of the stat that usually indicates Em Heat is on.

For my purposes, a jumper from W2 to F will light the LED whenever the TCONT803 calls for second stage heat.

D.

[BaldLoonie]

It will but since that's DIY, I didn't point it out. But since you found out on your own

[motoguy128]

I wonder if the 803's LED actually exists. The Vision Pro IAQ also referenced an led in some manuals... but it didn't exist on the unit I had at least. But one that model, I think it showed the status on the display.

[dancaselr]

I wonder if the 803's LED actually exists. The Vision Pro IAQ also referenced an led in some manuals... but it didn't exist on the unit I had at least. But one that model, I think it showed the status on the display.

It exists--and works (I've tested it on both of mine).

D.