Honeywell RTH8500 Installation Guide

RTH8500
5
About your new thermostatRemove your old thermostat
1. Turn off power at heating/cooling system (or fuse/circuit-breaker panel).
2. Remove cover and thermostat, but leave wallplate with wires attached.
Is there a sealed tube containing mercury?
If so, see inside front cover of this manual
for proper disposal instructions.
Old thermostat
Cover
Leave wallplate in place

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)