Installation Guide

RTH7400/RTH7500
1 69-2104ES—01
Getting started
Installation tips ...........................................2
Pre-installation checklist ...........................3
Old thermostat removal
Remove old thermostat .............................4
Identify and label wires ..............................5
New thermostat installation
Wallplate mounting ....................................6
Wire connections ....................................... 9
Battery installation ...................................13
Thermostat mounting ..............................14
Time/date settings ...................................15
System setup
How to enter system setup .....................16
How to change settings...........................17
System settings ..................................18-24
Appendices
Customer assistance ...............................25
In case of difficulty...................................26
1-year limited warranty ............................28
Table of contents