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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