From inside (document excerpt):
Honeywell CT3600/CT3697 Programmable Thermostat. Free PDF Owners Guide and User’s Manual. Seven Day Programmable Heat and/or Cool Low Voltage (20 to 30 Vac) Thermostat and Wallplate Model CT3600/CT3697
Contents
Step 1 Prepare for Installation 5
Step 2 Remove Old Thermostat 6
Step 3 Mount Thermostat Wallplate 7
Step 4 Wire Wallplate Terminals 8
Step 5 Install the Batteries 9
Step 6 Set Fan Operation Switch 10
Step 7 Mount the Thermostat 11
Step 8 Customize Your Thermostat 11
Step 9 Set the Clock 13
Step 10 Programming 14
Step 11 Operating Your Thermostat 17
Step 12 Set the Fan and System Switches 19
If You Have a Problem 20
Smart Response Technology 21
Wiring Diagrams 22
Source: honeywell.com