Manual Honeywell Chronotherm III - T8624C (page 1 of 24) (English)

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1 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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Honeywell Chronotherm III - T8624C Manual

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