PRODUCT DATA
® U.S. Registered Trademark
Copyright © 1997 Honeywell Inc. • • All Rights Reserved
T8600D, T8601D and T8602DChronotherm

®

IV Deluxe ProgrammableThermostats

APPLICATION

The T8600, T8601 and T8602 Chronotherm® IV Deluxe
Programmable Thermostats provide electronic control of
24 Vac single-stage heating and cooling systems.

T8600/T8601/T8602

FEATURES AND BENEFITS

•Full seven-day program capability; different schedules
and temperature setpoints may be selected for
everyday to match the homeowner’s flexible schedule.
•Copy key makes programming easier and faster for
the installer and homeowner.
•Daylight Savings Time (DST) key for quick change in
and out of Daylight Savings Time.
•Models available with programmable fan operation for
added homeowner comfort.
•Easy temporary temperature setpoint changes for
current period, vacation hold (1 to 255 days) or
indefinite hold adds to the homeowner comfort and
energy savings.
• Frequently used keys are located by the Liquid Crystal
Display (LCD) for quick and easy access to
information.
•Attractive styling complements any decor to the
homeowner’s delight.
•Back lighting the large display makes the LCD very
easy to read.
Contents
Application............................................................................. 1
T8600/T8601/T8602 Features and Benefits ......................... 1
Specifications........................................................................ 2
Ordering Information ............................................................. 2
Installation ............................................................................. 4
Wiring .................................................................................... 4
Settings ................................................................................. 6
Installer Setup ....................................................................... 7
Installer Self-Test................................................................. 10
Thermostat Information....................................................... 11
Programming....................................................................... 11
Operation ............................................................................ 16
Troubleshooting Guide........................................................ 17
Cross Reference ................................................................. 19
Wiring Diagrams (Fig. 15-20) .............................................. 24
•Models available with outdoor temperature sensor
capability for homeowner convenience. The sensor is
also more accurate than a thermometer.
•Configurable features allows one model to be used to
replace many different models (less inventory, no
longer need to carry separate models to get these
features).
—°F or °C temperature display;
—Automatic or manual changeover;
—Electric or conventional heat fan operation
—Adjustable heating cycle rate.
•Minimum off time for cooling compressors and heat
pumps protects the equipment and extends the
equipment life.
•Easy installation, setup and system test saves
installer time and increases productivity.
•Self-test simplifies troubleshooting and saves time by
overriding the time delays.
•Adaptive Intelligent Recovery™ control brings the
room temperature to temperature setpoint at the
programmed time, maximizing comfort and energy
savings.
• Setpoints are permanently held in memory (no
batteries used) and retained during power outages for
increased installer and homeowner convenience.
•Power stealing, hardwired and battery powered
models available for virtually all equipment and
application needs.
•Universal Versaguard™ Thermostat guards available
for added security.
68-0164-1