Home > Honeywell > Honeywell RTH8500 Wi-Fi Series Thermostat User Guide

Honeywell RTH8500 Wi-Fi Series Thermostat User Guide

Installing your thermostat  
Important! The Wi-Fi thermostat requires a C wire to operate. The C, or common, wire  
brings 24 VAC power to the thermostat. Many older mechanical or battery operated  
thermostats do not require a C wire. If you don’t have a C wire, try:  
• Looking for an unused wire that is pushed into the wall. Connect that wire to C and  
check that it is connected to the 24 VAC common at your heating/cooling system.  
Check the video section at wifithermostat.com  
Note: Not all heating/cooling systems label the 24 VAC common C. Check your system  
manual or contact the manufacturer to find out which terminal is the 24 VAC common.  
View the Alternate Wiring videos at wifithermostat.com/videos  
Wiring  
For conventional heating/cooling systems (natural gas, oil or electric furnace, air  
conditioner), see page 6. See “Glossary” on page 27 for further definition.  
For a heat pump system, see page 7. See “Glossary” on page 27 for further  
definition.  
Remove metal jumper  
only if you have both  
R and RC wires  
Wiring (conventional system)  
7A Wire the Wi-Fi thermostat to your conventional system.  
a
Starting with the C Wire, match the sticky tag on the  
wire to the terminal labels.  
HEAT PUMP  
CONVENTIONAL  
You must have a C wire. See page 6.  
b
Loosen screw, insert wire on inside edge of  
terminal, then tighten screw.  
RC  
R
RC  
R
Y2  
R
L
E/AUX  
K
W
W
Y
O/B  
Y
W2  
K
c
Verify wire is firmly secured by gently pulling  
on wire.  
Y
G
G
G
C
C
C
d
e
Repeat steps a–c for all other wires.  
Push any excess wire back into the wall  
opening after all wires are installed.  
Note: The wiring for your  
application might be different  
than the wiring from above.  
f
Continue to page 9.  
Labels don’t match? See alternate  
wiring key on page 7.  
33-00133EF—01  
6
GeneralDetails
NameHoneywell RTH8500 Wi-Fi Series Thermostat User Guide
MakeHoneywell
LanguageEnglish
FiletypePDF (Download)
File size1.23 MB
Download PDF
1 Star2 Stars3 Stars4 Stars5 Stars (1 votes, average: 5.00 out of 5)
Loading...
Honeywell T6 Pro Programmable Thermostat User Manual
Honeywell T6 Pro Programmable Thermostat User Manual
Honeywell D1-528 Direct Thermostat Installation Guide
Honeywell D1-528 Direct Thermostat Installation Guide
Honeywell FocusPRO P200 Programmable Thermostat User Guide
Honeywell FocusPRO P200 Programmable Thermostat User Guide
Honeywell RCHT8610WF Series Smart Thermostat Installation Guide
Honeywell RCHT8610WF Series Smart Thermostat Installation Guide
Honeywell T9 Smart Thermostat Installation Guide
Honeywell T9 Smart Thermostat Installation Guide
Honeywell TH2320WF4011 FocusPRO Smart S200 Series Thermostat User Guide
Honeywell TH2320WF4011 FocusPRO Smart S200 Series Thermostat User Guide
Honeywell TL116A Thermostat Installation Guide
Honeywell TL116A Thermostat Installation Guide
T10 Pro Smart Thermostat with Redlink Room Sensor
T10 Pro Smart Thermostat with Redlink Room Sensor
Honeywell TH6320WF2003 Lyric T6 Pro Wi-Fi Programmable Thermostat User Guide
Honeywell TH6320WF2003 Lyric T6 Pro Wi-Fi Programmable Thermostat User Guide
Honeywell RTH9580 Wi-Fi Color Touchscreen Programmable Thermostat User Guide
Honeywell RTH9580 Wi-Fi Color Touchscreen Programmable Thermostat User Guide

Honeywell RTH8500 Wi-Fi Series Thermostat User Guide