Follow Important Instructions - Honeywell RTH7400D Owner's Manual

Step 2. Follow Important Instructions
1. Do not connect the wires to the new thermostat
based on wire color because damage can occur to
the heating and/or cooling system.
These Installation Instructions explain later how to
use the enclosed wire labels to correctly mark the
wires connected to your old thermostat.
OLD THERMOSTAT
Y
G
GREEN
RC
YELLOW
WHITE
RED
R
ORANGE
5
W
DO NOT WIRE
NEW THERMOSTAT
BASED ON
WIRE COLOR.
!
M22034
69-1726—1