OK, so, I have a Helix thermostat, the basic unit with the 2 little screws in the front along with the 2 LED's and the 2 phone jacks on the bottom. Does anyone know the operation on this unit?

I think you plug the power supply cord into the right phone jack (as you face the unit), and I think the right screw is the one that adjusts the temperature setting on the unit. So what are the left jack and screw for?

Ben