Honeywell RCT8100 Guía De Instalación Rápida página 9

Connect Wires (less common wiring)
If a labeled wire does not match any terminal
designation, see diagram below.
Do not use C, X or B. Wrap bare end of wire
with electrical tape.
If wires are connected to both Rh and Rc
terminals, remove jumper (see previous
page).
RCT8100 Programmable Thermostat
7