31 68-0058—1
T8621A,C,D
TABLE OF CONTENTS
Table of Contents
page
Specifications ...................................................................................................................................................................... 2
Ordering Information .......................................................................................................................................................... 2
Selection/Application .......................................................................................................................................................... 5
Installation ........................................................................................................................................................................... 7
Compatibility .................................................................................................................................................................. 7
Location .......................................................................................................................................................................... 7
Mounting Subbase .......................................................................................................................................................... 8
Mounting Remote Temperature Sensor ......................................................................................................................... 8
Wiring ............................................................................................................................................................................. 9
Adjusting Cycle Rate ................................................................................................................................................... 15
Time/Temperature Conversion .................................................................................................................................... 15
Fan Operation Option Switch....................................................................................................................................... 16
Installing Batteries........................................................................................................................................................ 16
Power Outages.............................................................................................................................................................. 16
Mounting the Thermostat ............................................................................................................................................. 16
Setting Day and Time................................................................................................................................................... 16
Checkout............................................................................................................................................................................ 17
Heating.......................................................................................................................................................................... 17
Cooling ......................................................................................................................................................................... 17
Fan ................................................................................................................................................................................ 17
Installer Self-Test ......................................................................................................................................................... 18
Programming the Thermostat ........................................................................................................................................... 19
Enter the Day and Time ............................................................................................................................................... 19
Set the Program Times and Temperatures for One Day.............................................................................................. 20
Copy the Program to the Desired Days........................................................................................................................ 22
Set the Schedules and Temperatures For the Remaining Days ................................................................................... 23
Set the System and Fan Switches on the Subbase‘ ...................................................................................................... 24
Operating the Thermostat.................................................................................................................................................. 25
Temporarily Changing the Program ............................................................................................................................ 25
Reprogramming the Thermostat .................................................................................................................................. 25
Holding a Temperature for Extended Absence............................................................................................................ 26
Canceling Program Settings ......................................................................................................................................... 26
Checking the Program Times and Temperatures......................................................................................................... 27
Checking the Current Temperature Setting ................................................................................................................. 27
Operation ........................................................................................................................................................................... 28
ADAPTIVE INTELLIGENT RECOVERY™ Operation ........................................................................................... 28
What to Expect During Recovery from Energy Savings in Heating ........................................................................... 28
Thermal Performance with T8621 ............................................................................................................................... 28
Minimum-Off Timing .................................................................................................................................................. 28
Troubleshooting ................................................................................................................................................................ 29
Glossary............................................................................................................................................................................. 30
This equipment is a Class B digital apparatus which complies with Canadian Radio Interference Regulations, CRC c.1374.
