The cycle of the heater and chiller is +/- 1. I think this setting will cause them to fight.
I called and they recommended the following if I want to keep temperature at 77 F.
Chiller is set to 78. Because of of +/- 1, when it hits 79, it will cool to 77.
Heater is set to 76. Because of of +/- 1, when it hits 75, it will heat to 77.