Honeywell RTH7400 series - About Your New Thermostat; Thermostat Features

4
MCR33763
Label the wires using the supplied wire labels as you
disconnect them, then remove the old wallplate.
3
Label Wires with Tags
Wire Labels
Wire color might not match labels.
M31545
NOTE: Jumper wire used on old thermostat? If yes, note
what letters the jumper connected and review in wiring
section.