Honeywell RTH8500 Installation Guide

1
Getting started
Installation tips ...........................................2
Pre-installation checklist ...........................3
Old thermostat removal
Remove old thermostat .............................5
Identify and label wires ..............................6
New thermostat installation
Wallplate mounting ....................................7
Wire connections ..................................... 10
Battery installation ...................................13
Thermostat mounting ..............................14
Time/date settings ...................................15
System setup
How to change settings...........................16
System settings ..................................17-23
Appendices
In case of difficulty...................................24
Customer assistance ...............................27
Limited warranty ......................................28
Table of contents
RTH8500

Honeywell RTH8500 Specifications

General

Hold Feature	Yes
Compatibility	Works with most heating and cooling systems
Temperature Range	40°F to 90°F
Weight	250 g
Programmable	7-day programmable
Dimensions	4.5 x 3.5 x 0.9 inches (114 x 89 x 23 mm)