Honeywell RTH8500D User Manual

69-1725-1 10
Step 5. Label Old Thermostat Wires
1. As you disconnect each wire, use the enclosed wire labels to
wrap a wire label around each wire that matches the letter
designation. Do not allow the wires to fall into the wall opening
after the wires are disconnected.
2. Remove any remaining part of the old thermostat from the wall.
When connecting the wires to the new thermostat, refer to
the wire labels. Do not connect wires to your new thermostat
based on the color of the wire.
Y
G
R
C
R
OLD THERMOSTAT
WIRE HOLE
M22039
WIRE
SCREW
TERMINAL
LETTER
DESIGNATION
WIRE LABEL
W
W
G
Y
R
RC

Honeywell RTH8500D Specifications

General

Programmability	7-day programmable
Wi-Fi	No
Operating Modes	Heat, Cool, Auto, Off
Filter Change Alert	Yes
Backup Battery	Yes
Display	Touchscreen
Power Source	Battery or Hardwired
Compatibility	Gas, oil, electric, and heat pump systems
Stages	Up to 2 Heat/2 Cool
Fan Modes	Auto, On, Circulate
Temperature Range	40°F to 99°F (4°C to 37°C)
Hold Feature	Yes