1 68-0076—1
CONTENTS
Specifications ................................................. 2
Ordering Information..................................... 2
Selection/Application ..................................... 5
Installation ................................................... 12
Checkout....................................................... 18
Programming The Thermostat ..................... 20
Operating The Thermostat ........................... 25
Operation ..................................................... 27
Troubleshooting ........................................... 29
Glossary ....................................................... 30
Table of Contents ......................................... 32

T8611M

(7-Day Programming)

Chronotherm III™

Heat Pump Thermostats

The T8611M Chronotherm III Programmable

Thermostat provides automatic control of multi-

stage heat pump systems and offers users the

highest standard of comfort and convenience

available with energy savings.

Full seven-day program capability; different sched-
ules may be selected for every day.
Can be programmed in hand (with batteries in-
stalled) or on the wall to provide up to four tem-
perature periods per day.
Large digital clock (liquid crystal display) indi-
cates continuous time-of-day, day-of-week, cur-
rent period and room temperature.
Adaptive Intelligent Recovery™ brings room tem-
perature to programmed temperature at program-
med time, maximizing comfort and energy sav-
ings.
Temperature control program maintains tempera-
ture within 1° F of setpoint.
Temporary program override available by using—
WARMER and COOLER keys.
SKIP next period key.
CHANGE to last period key.
HOLD TEMP key provided for indefinite program
override (vacation/holiday).
Installer self-test with time delay override saves
installation time.
SYSTEM light-emitting diode (LED) on thermo-
stat indicates system is energized.
AUX. HT., EM. HT., CHECK LEDs available on
select models.
Automatic heat/cool changeover.
Batteries included provide power to maintain clock
and memory during power failures.
Switching subbase with wiring terminals included.
Powered directly from control transformer.
Model available with separate sensor for remote
temperature sensing.
C. H. • Rev. 10-92 • ©Honeywell Inc. 1992 • Form Number 68-0076—1