Honeywell RTH7400 - Wire Labeling Procedure; Identify Wire Types

RTH7400/RTH7500
5 69-2104ES—01
About your new thermostatLabel wires and remove old wallplate
Use a screwdriver to disconnect wires one by one. As you disconnect each wire,
wrap it with the label matching the letter on your old thermostat. (Adhesive labels are
supplied in your thermostat package.)
Remove the old wallplate only after all wires are labeled. Be careful not to let loose
wires fall into the wall opening.
Wrap supplied labels securely around each wire
Do not let wires fall into wall opening!
M28072
IGNORE WIRE COLORS: Use only letter designations to
identify wire types.