Honeywell Chronotherm III - T8624C Manual
Honeywell
Thermostat
Chronotherm III - T8624C
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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.
â– Different schedules may be selected for week-
days, Saturday and Sunday.
â– Can be programmed in hand (with batteries in-
stalled) or on wall to provide up to four tempera-
ture settings per day.
â– 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.
â– Temperature control program maintains tempera-
ture within 1° F of setpoint.
â– Temporary program override available by using:
— WARMER and COOLER keys.
— SKIP next period key.
— CHANGE to last period key.
â– HOLD TEMP key provided for indefinite pro-
gram override (vacation/holiday).
â– Installer self-test and time delay override save
installation time.
â– SYSTEM light-emitting diode (LED) indicates
system is energized.
â– Models available with automatic or manual heat/
cool changeover.
â– Batteries included provide power to maintain
clock and memory during power failures.
â– Switching subbase with wiring terminals included.
â– Powered directly from control transformer, re-
quiring an extra (24V) wire to thermostat.
â– 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
2
T8624C,D
SPECIFICATIONS • ORDERING INFORMATION
Ordering Information
When purchasing replacement and modernization products from your TRADELINE® wholesaler or your distributor, refer to the
TRADELINE Catalog or price sheets for complete ordering number, or specify—
1. Model number. 3. System, fan switching desired.
2. Number of heat and cool stages desired. 4. Application.
If you have additional questions, need further information or would like to comment on our products or services, please write or
phone:
1. Your local Honeywell Home and Building Control Sales Office (check white pages of your phone directory).
2. Home and Building Control Customer Satisfaction
Honeywell Inc., 1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386 (612) 951-1000
In Canada—Honeywell Limited/Honeywell Limitee, 740 Ellesmere Road, Scarborough, Ontario M1P 2V9. International
Sales and Service offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France, Germany,
Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
Specifications
IMPORTANT: The specifications given in this publi-
cation do not include normal manufacturing toler-
ances. Therefore, this unit may not exactly match
the listed specifications. Also, this product is tested
under closely controlled conditions, and some mi-
nor differences in performance can be expected if
those conditions are changed.
TRADELINE® MODELS
TRADELINE models (see Table 1) are selected and
packaged to provide ease of stocking and handling
and also maximum replacement value.
LIGHT-EMITTING DIODE (LED): SYSTEM LED
lights during thermostat ON cycle.
VOLTAGE RATING: 15 to 30 Vac.
CURRENT RATING: 1.6A maximum total per stage.
OPERATING HUMIDITY RANGE: 5 to 90 percent
relative humidity, noncondensing.
OPERATING AMBIENT TEMPERATURE RANGE:
40° F to 110° F [4° C to 43° C].
TABLE 1—TRADELINE MODELS.
SETPOINT RANGE: 45° F to 88° F [7° C to 31° C].
CALIBRATION: Self-calibrating thermostat and
thermometer to ±1° F.
SHIPPING TEMPERATURE: -20° F to +120° F [-29° C
to +49° C].
CYCLES PER HOUR ADJUSTMENT:
Heating: First stage of 2-stage heat models—fixed at
3 cph. Second stage of 2-stage heat models or heat
stage of single-stage heat models—factory-set at
6 cph; field-adjustable to 1,3,6 or 9 cph.
Cooling: Factory-set at 3 cph (not field adjustable);
minimum off-time of five minutes.
FINISH: Beige matte with decorative brushed metal
faceplate or Premier White™.
DIMENSIONS: Thermostat (mounted on subbase)—7 in.
[178 mm] long, 5-5/16 in. [135 mm] high, 1-3/4 in.
[44 mm] deep. See Fig. 1 for subbase dimensions.
TYPICAL KEYPAD: See Fig. 2.
ACCESSORIES:
TG586A Locking Cover.
TG512 Versaguard™ Universal Thermostat Guard.
Thermostat
Model Stages Changeover Switching
Number Heat Cool Type System Fan Application
T8624C 2 1 Auto HEAT-AUTO-COOL-OFF ON-AUTO Multistage
T8624D 2 2 Auto HEAT-AUTO-COOL-OFF ON-AUTO Multistage
T8624D 2 2 Manual HEAT-OFF-COOL ON-AUTO Multistage
3 68-0134
T8624C,D
SPECIFICATIONS
Fig. 1—T8624 Subbase mounting dimensions in in. [mm].
4 [121]
3
4
3 [83]
5
16
7 [179]
1
[46]
13
16
5
[135]
5
16
M5181A
43
32
[104]
131
32
[50]
Fig. 2—Typical thermostat keypad.
SYSTEM
RUN
PROGRAM
WAKE
TIME
TEMPERATURE
PRESENT
SETTING
SKIP
NEXT
PERIOD
CHANGE
TO LAST
PERIOD
SET
PRESENT
DAY/TIME
HOLD
TEMP
DAY
SET
HEAT/COOL SLEEP
LEAVE AHEAD WARMER
BACK COOLER
M2998
WED
LEAVE
AM
HEAT ON
HEAT AUTO COOL ON AUTO
FAN
ROOM
RETURN
OFF
PERIOD
Product Specifications
| Brand: | Honeywell |
| Category: | Thermostat |
| Model: | Chronotherm III - T8624C |
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