Honeywell CHRONOTHERM T8624C User's Manual

Honeywell Thermostats User's Manual - CHRONOTHERM T8624C.
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68-0134

C.H.  •  9-93  •  ©Honeywell Inc. 1993  •  Form Number 68-0134

The T8624C,D Chronotherm III Program-

mable Fuel Saver Thermostats provide auto-
matic control of multistage heating/cooling sys-
tems and offer users the highest standard of
comfort and convenience available with energy
savings.

■ Different schedules may be selected for week-

days, Saturday and Sunday.

■ Can be programmed in hand (with batteries in-

stalled) or on wall to provide up to four tempera-
ture settings per day.

■ Large digital clock (liquid crystal display) indi-

cates continuous time, day, current period and
room temperature.

■ Adaptive Intelligent Recovery™ brings room tem-

perature to programmed temperature at pro-
grammed time, maximizing comfort and energy
savings.

■ 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 pro-

gram override (vacation/holiday).

■ Installer self-test and time delay override save

installation time.

■ SYSTEM light-emitting diode (LED) indicates

system is energized.

■ Models available with automatic or manual 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, re-

quiring an extra (24V) wire to thermostat.

■ Fan operation switch to select either independent

or direct thermostat control of fan in heating
included on back of select models.

CONTENTS

Specifications ................................................. 2
Ordering Information ..................................... 2
Selection/Application ..................................... 4
Installation ..................................................... 5
Checkout ....................................................... 11
Programming the Thermostat ...................... 14
Operating the Thermostat ............................ 18
Troubleshooting ........................................... 21
Glossary ....................................................... 22

T8624C,D (5-1-1 Day

Programming) Chronotherm®

III Fuel Saver Thermostats

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