Installation Tips - Honeywell RTH8500 Installation Manual

Installation Guide
Installation is easy—even if you've never done it before! About your new thermostat
Your new thermostat has been designed for fast, easy installation. Just follow the
simple, step-by-step instructions in the following pages.
Install in three simple steps
• Label wires and remove your old thermostat (see pages 5-6).
• Install and wire your new thermostat (see pages 7-15).
• Set your new thermostat to match your heating/cooling system
(see pages 16-23).

Installation tips

• Have everything you need ready to go before you begin (see pages 3-4).
• Do not use wire color as a guide. Use wire labels instead (see page 6).
TURN OFF POWER at heating/cooling system (or fuse/circuit-breaker panel) before you
begin installation.