Honeywell T8602C User manual

Honeywell
T8602C Chronotherm® IV
Deluxe Programmable Thermostats
INSTA ATION INSTRUCTIONS
APP ICATION
The T8602 Chronotherm® IV Deluxe Programmable
Thermostat provi es electronic control of 24 Vac single
stage heating an cooling systems or 750 mV heating
systems. Refer to Table 1 for a general escription of the
thermostat. All T8602 thermostats are powere by
batteries.
Table 1. Description of T8602 Thermostats.
T8602 System Changeover System Selection Fan Selection Comments
C Heat-Cool Manual Heat-Off-Cool On-Auto System an fan selections are one by
keyboar .
® MERCURY NOTICE
If this control is replacing a control that contains
mercury in a seale tube, o not place your ol
control in the trash. Dispose of properly.
Contact your local waste management authority
for instructions regar ing recycling an the
proper isposal of the ol control.
INSTA ATION
When Installing this Product...
1. Rea these instructions carefully. Failure to follow
the instructions can amage the pro uct or cause
a hazar ous con ition.
2. Check the ratings given in the instructions an on
the pro uct to make sure the pro uct is suitable for
your application.
3. Installer must be a traine , experience service
technician.
4. After completing installation, use these instructions
to check out the pro uct operation.
ocation
Install the thermostat about 1.5m (5 ft) above the floor in
an area with goo air circulation at average temperature.
See Fig. 1.
Do not install the thermostat where it can be affecte by:
— rafts, or ea spots behin oors an in corners.
— hot or col air from ucts.
— ra iant heat from sun or appliances.
— conceale pipes an chimneys.
— unheate (uncoole ) areas such as an outsi e wall
behin the thermostat.
® U.S. Registere Tra emark
Copyright © 2002 Honeywell • • All Rights Reserve 69-1509-2

T8602C CHRONOTHERM® IV DELUXE PROGRAMMABLE THERMOSTATS
Wallplate Installation
The thermostat can be mounte horizontally on the wall
or on a 50.8 mm x 101.6 mm (2 in. x 4 in.) wiring box.
Position wallplate horizontally on the wall or on a
50.8 mm x 101.6 mm (2 in. x 4 in.) wiring box.
1. Position an level the wallplate (for appearance
only). The thermostat will function properly even
when not level.
2. Use a pencil to mark the mounting holes.
See Fig. 2.
3. Remove the wallplate from the wall an rill two
76 mm (3/16 inch) holes in the wall (if rywall) as
marke . For firmer material such as plaster, rill
two 5.56 mm (7/32 inch) holes. Gently tap anchors
(provi e ) into the rille holes until flush with the
wall.
4. Position the wallplate over the holes, pulling wires
through the wiring opening.
5. Loosely insert the mounting screws into the holes.
6. Tighten mounting screws.
MOUNTING
HOLES
Fig. 2. Mounting the wallplate.
69-1509—2 2

T8602C CHRONOTHERM® IV DELUXE PROGRAMMABLE THERMOSTATS
WIRING
THERMOSTAT
All wiring must comply with local electrical co es an
or inances. Refer to Fig. 3 through 5 for typical hookups.
A letter co e is locate near each terminal for
i entification.
A CAUTION
Electrical Hazard.
Can cause electrical shock or equipment
damage.
Disconnect power before wiring.
1. Loosen the terminal screws on the wallplate an
connect the system wires. See Fig. 6.
IMPORTANT
Use 18 g uge, color-coded thermost t c ble for
proper wiring.
2. Securely tighten each terminal screw.
3. Push excess wire back into the hole.
4. Plug the hole with nonflammable insulation to
prevent rafts from affecting the thermostat.
Y G O B W R RC OT OT
TRANSFORMER
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2 CAN BE USED FOR CHANGEOVER VALVE ON SINGLE-STAGE HEAT
PUMP SYSTEMS.
3 AVAILABLE ON SELECT MODELS. OT WIRES MUST HAVE A
SEPARATE CABLE FROM THE THERMOSTAT CABLE. M10347A
Fig. 4. Typical hookup in heat and cool system with
one transformer.
THERMOSTAT
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2 JUMPER RC TERMINAL TO R TERMINAL WHEN INSTALLED ON A
ONE TRANSFORMER SYSTEM.
3 AVAILABLE ON SELECT MODELS. OT WIRES MUST HAVE A
SEPARATE CABLE FROM THE THERMOSTAT CABLE. M10855
THERMOSTAT
GENERATOR M1ILLIV°LTAGE
GAS CONTROL
1 AVAILABLE ON SELECT MODELS. OT WIRES MUST HAVE A
SEPARATE CABLE FROM THE THERMOSTAT CABLE. M20270
Fig. 5. T8602 typical millivoltage heating circuit.
Fig. 3. T8602 typical hookup in heat and cool system
with two transformers. FOR WRAPAROUND
INSERTION STRIP
7/16 IN. (11 MM).
FOR STRAIGHT INSERTION
STRIP 5/16 IN. (8 MM).
M4826
Fig. 6. Correct wiring technique.
3 69-1509—2

T8602C CHRONOTHERM® IV DELUXE PROGRAMMABLE THERMOSTATS
Mounting Thermostat
1. Engage tabs at the top of the thermostat an wall
plate. See Fig. 7.
2. Press lower e ge of case to close an latch.
NOTE: To remove the thermostat from the wall, first pull
out at the bottom of the thermostat; remove top
last.
Using Thermostat Keys
The thermostat keys are use to:
• set current ay an time,
• program times an setpoints for heating an cooling,
• temporarily overri e program temperatures,
• isplay present setting,
• configure Installer Setup,
• check Self-Test,
• isplay out oor temperature (select mo els),
• set the system operation,
• set the fan operation.
NOTE: See Fig. 8 for the location of the keys.
Fig. 7. Mounting thermostat on wallplate.
ENTER
M14624
Fig. 8. T8602C key locations and descriptions.
69-1509—2 4

T8602C CHRONOTHERM® IV DELUXE PROGRAMMABLE THERMOSTATS
SETTINGS
System and Fan Settings
The system efault setting is Heat an the fan efault
setting is Auto. Use the System an Fan keys to change
the settings. See Fig. 9. The fan settings can be set for
each program perio in ivi ually. The system selection is
for all the program perio s.
System settings control the thermostat operation:
Heat: The thermostat controls the heating.
Off: Both the heating an cooling are off.
Cool: The thermostat controls the cooling.
Fan settings control the system fan:
On: Fan operates continuously.
Auto: Fan operates with equipment.
M14Ö25
Fig. 9. Thermostat System and Fan key locations.
NOTE: Always press the keys with your fingertip or
similar blunt tool. Sharp instruments like a pen
or pencil point can amage the keyboar .
Temperature Settings
Refer to Table 2 for the efault program. If the aytime
energy savings perio is not use , press the perio key
(Leave or Return) until the time is blank. The fan setting
feature is available on select thermostat mo els. See
Owner’s Gui e, form number 69-0940, for complete
instructions on changing the program.
Table 2. Default Program Settings.
Period Time Heat Setpoint Cool Setpoint Fan Setting
Wake 6:45 AM 20°C 25°C Auto
Leave 8:45 AM 4.5°C 37°C Auto
Return 5:00 PM 20°C 25°C Auto
Sleep 10:00 PM 4.5°C 37°C Auto
INSTA ER SETUP
NOTE: For most applications, the thermostat factory-
settings o not require changing. Review fac
tory settings in Table 2 an if no changes are
necessary, go to Installer Self-Test section.
The Installer Setup is use to customize the thermostat
to specific systems. Some of the options inclu e
temperature isplay, system changeover an out oor
temperature isplay. Installer Setup numbers are liste in
Table 3. The table inclu es all the configuration options
an the factory settings for the T8602.
A combination of key presses are require to use the
Installer Setup feature:
— To enter the installer setup, press an hol the
information i key with the increase s an
ecrease t keys until the first number is isplaye . All
isplay segments appear for approximately three
secon s before the number is isplaye . See Fig. 10
an 11.
— To a vance to the next Installer Setup, press the
Time A key.
— To change a setting, use the increase s or
ecrease t key.
— To scroll the Installer Setup numbers backwar , press
the Time V key.
To exit the Installer Setup, press Run Program.
W aif Set Programl Set Day/Time Temporary Setting System
Em Heat
Off
Recovery AM
Hol f°r PM
Filter |E m Ht |A u x H j Days
MonTueWe ThuFri SatSun Repl Batt Room Out oor \ ,
Wake Leave Return Sleep DST ▼ Heat Cool
Cool
Auto
- Fan On
Auto
M14559
Fig. 10. Display of all CD segments.
M14618
Fig. 11. Installer setup number and setting display.
A CAUTION
Electric Heat System Configuration Hazard.
Can cause equipment damage.
Configure electric heat system to 1 in
Installer Setup number 2 to prevent system
running without fan.
IMPORTANT
Only configur ble numbers re shown on the
device. Ex mple: If thermost t does not h ve
system key, Inst ller Setup Number 12 will not
be displ yed. Review T ble 3 f ctory-settings
nd m rk ny desired ch nges in the Actu l
Setting column. When Inst ller Setup is
complete, review the settings to confirm th t
they m tch the system.
5 69-1509—2

T8602C CHRONOTHERM® IV DELUXE PROGRAMMABLE THERMOSTATS
Table 3. Thermostat Installer Setup Options.
Select
Installer Setup
Number (Press
Time A key to
change)
Factory Setting Other Choices
(Press s or t key to change) Actual
SettingDisplay Description Display Description
Not Use . 1 — — — — —
Fan operationa. 2 0 Conventional
applications where
equipment
controls fan
operation in heat
mo e.
1 Heat pump or electric heat
applications where
thermostat controls fan
operation in heat mo e.
Not Use . 3 — — — — —
Heating cycle
rate. 4 6 6—6 cph use for conventional heat. 1, 3 or 9 1—1 cph use for ra iant floor heat, gravity
system.
3—3 cph use for hot water
systems or high
efficiency furnaces.
9—9 cph use for electric
heat systems.
Not Use . 5 thru 12 — — — — —
A aptive
Intelligent
Recovery™
control.
13 1 Conventional
recovery (system
starts recovery at
programme time).
A aptive Intelligent
Recovery™ control is
activate (system starts
early so setpoint is reache
by start of program perio ).
Not Use . 14 an 15 — — — — —
Clock format. 16 0 12-hour clock
format. 1 24-hour clock format.
Not Use . 17 thru 23 — — — — —
Out oor
temperature
isplay (select
mo els).
24 0 No out oor
temperature is
isplaye .
1 Out oor temperature is
isplaye . Nee s a
C7089B1000 Out oor
Temperature Sensor to
operate.
Not Use . 25 thru 32 — — — — —
Minimum off
time for the
compressor.
33 5 5 minute minimum
off time for the
compressor.
0 thru 4 Minimum number of minutes
(0 thru 5) the compressor is
off between calls for the
compressor.
Temperature
range stops in
heating.
34 32.0 Highest heating
setpoint setting 4.5 to
31.5 Temperature range (0.5°C
increments) of heating
setpoint setting.
Temperature
range stops in
cooling.
35 7.0 Lowest cooling
setpoint setting. 7.5 to 37.0 Temperature range (0.5°C increments) of cooling
setpoint setting.
Not Use . 36 — — — — —
a Number 2 must be set to 1 exten fan operation.
69-1509—2 6

T8602C CHRONOTHERM® IV DELUXE PROGRAMMABLE THERMOSTATS
Table 3. Thermostat Installer Setup Options. (Continued)
Select
Installer Setup
Number (Press
Time A key to
change)
Factory Setting Other Choices (Press s or t key to change) Actual
SettingDisplay Description Display Description
Temperature
isplay
a justment.
37 0 No ifference in
isplaye
temperature an
actual room
temperature.
1.5 thru -
1.5 .5—Display a justs to 0.5°C higher than actual room
temperature.
1.0—Display a justs to
1.0°C higher than actual
room temperature.
1.5—Display a justs to
1.5°C higher than actual
room temperature.
-.5—Display a justs to -.5°C
lower than actual room
temperature.
-1.0—Display a justs to
-1.0°C lower than actual
room temperature.
-1.5—Display a justs to
-1.5°C lower than actual
room temperature.
Furnace Air
Filter Timer. 43 0 Off 1, 2, 3, 4 1 - 10 ays
2 - 30 ays
3 - 60 ays
4 - 120 ays
(Time is counte when heat,
cool or fan is running.)
Humi ifier Pa
Monitor. 44 0 Off 1, 2, 3 1 - 90 ays
2 - 180 ays
3 - 365 ays
(Time is counte by calen ar
ays in heat mo e.)
Ultraviolet (UV)
Air Treatment
System Lamp
Monitor.
45 0 Off 1 1 - 365 ays
(Time is counte by calen ar
ays in any mo e.)
IMPORTANT
Review the settings to confirm th t they m tch
the system. Press Run Progr m to exit the
Inst ller Setup. The thermost t h s s ved the
Inst ller Setup ch nges nd initi ted reset in
order to oper te using the new settings. Be sure
to set the current d y nd time immedi tely.
7 69-1509—2

T8602C CHRONOTHERM® IV DELUXE PROGRAMMABLE THERMOSTATS
Setting Current Day and Time
1. Press Set Current Day/Time.
NOTE: On initial powerup or after an exten e power
loss, 1:00 pm flashes on the isplay until a key
is presse .
2. Press Day until the current ay is isplaye .
NOTE: Sun=Sun ay, Mon=Mon ay,
Tue=Tues ay, We =We nes ay,
Thu=Thurs ay, Fri=Fri ay, Sat=Satur ay.
^^^^^^■sëTDiÿÏÏimë|
in n PM
M14620
3. Press Time A or Time V until the current time is is
playe .
NOTE: Tapping the Set Current Day/Time changes the
time in one hour increments.
_
INSTA ER SYSTEM TEST
Use the Installer System Test to check the thermostat
operation. Refer to Table 4 for a list of the available
system tests.
A CAUTION
Equipment Damage Hazard.
Minimum compressor off-time is bypassed
during Installer System Test.
Avoi cycling compressor quickly.
To start the system test:
Press an hol the increase s an ecrease t keys at the
same time until 10 appears. All segments of the isplay
will be isplaye before the 10 appears.
See Fig. 12 an 13.
Table 4. Tests Available In Installer System Test.
Test
Number System Test Description
10-19 Heating equipment can be turne on an off.
30-39 Cooling equipment can be turne on an off.
40-49 Fan equipment can be turne on an off.
60 0 to
60 19 Keyboar keys test.
70-79 Thermostat information inclu ing ate co e
an software versions is isplaye .
Waif Set Program Set Day/Time Temporary
Recovery
Hol for
Setting Svstem
Q ,' Em Heat
D O -O D iv
0 0 - 0 0 p ~ Q Q g Q ¡ A ■ * “ o0
Filter |E m Ht |A u x H j Days
MonTueWe ThuFri SatSun Repl Batt Room Out oor \
Wake Leave Return Sleep DST ▼ Heat Cool On
Auto
M14559
NOTE: If the current time is Daylight Savings Time,
press Daylight Time until DST is isplaye . Fig. 12. Display of all CD segments.
Set Day/Time
Q: lb*"
M14622
in
I u II
4. Press Run Program. M14612
M14623
Fig. 13. Display of test number.
Refer to Table 5 for the irections an results of the
specific tests
NOTE: Press Time A to a vance to the next test an
Time V to go back to the previous test. Press
Run Program to exit the system test.
69-1509—2 8

T8602C CHRONOTHERM® IV DELUXE PROGRAMMABLE THERMOSTATS
Table 5. .Installer System Test Options.
Keys to
Press Test Number Description
Heating Equipment System Test
Time A 10 Enter heating equipment system test.
s11 Heat comes on. When Installer Setup number 2 is 1, the system fan is also energize .
t10 Heat an system fan turn off.
Cooling Equipment System Test
Time A 30 Change from heating to cooling equipment system test.
s31 Cool an system fan come on.
t30 Cool an system fan turn off.
Fan Equipment System Test
Time A40 Change from cooling to fan equipment system test.
s41 Fan comes on.
t40 Fan turns off.
Key Operation System Test
Time A 60 2 Change from fan to key operation system test.
NOTE: Press any key an the isplaye numbers change. Press Time V to go to the previous test an Time A to go to
the next test. The Run Program key will not exit this test. Press Time A or Time V an then the Run Program
key to exit.
9 69-1509—2

T8602C CHRONOTHERM® IV DELUXE PROGRAMMABLE THERMOSTATS
THERMOSTAT INFORMATION
1. Press the Time A key to access the thermostat
information.
2. Press the increase s key to isplay the pro uction
ate co e. The first two large igits are the month
an the thir igit is the last igit of the year.
(Example: 027 = February 1997)..
3. Press the increase s key again to isplay the soft
ware i entification co e. (Example: 02 = software
ID co e 2)
4. Press the increase s key again to isplay the soft
ware revision number.
(Example: 001 = Revision number 1)..
a
m i
i r
I
M14616
5. Press the increase s key again to isplay the
EEPROM i entification co e. (Example: 314 =
EEPROM ID 314).
~IU ” 1 IU 1
M14617
6. Press the Run Program key to exit the System
Test. The System Test times out after four minutes
without any key presses.
CHECKOUT
Outdoor Temperature Sensor
(Select Models)
Allow the out oor temperature sensor to soak in the
out oor air for a minimum of five minutes before taking a
rea ing.
69-1509—2 10

T8602C CHRONOTHERM® IV DELUXE PROGRAMMABLE THERMOSTATS
TROUB ESHOOTING GUIDE
Table 6. Troubleshooting Guide.
Symptom Possible Cause Action
Display oes not
come on. Thermostat is not being powere . • Check if batteries are present an installe correctly. — If batteries are present an installe correctly, replace
thermostat.
Temperature
isplay is incorrect. Room temperature isplay has been reconfigure . Enter Installer Setup number 37 an reconfigure the isplay.
Thermostat is configure for °F
or °C isplay. Enter Installer Setup number 14 an reconfigure the isplay.
Ba thermostat location. Relocate the thermostat.
Temperature
settings o not
change. (Example:
Cannot set the
heating higher or
the cooling lower.)
The upper or lower temperature
limits were reache . Check the temperature setpoints:
• Heating limits are 4.5 to 32°C
• Cooling limits are 7 to 37°C
The setpoint temperature range
stops were configure . Check Installer Setup numbers 34 an 35 an reconfigure the setpoint stops.
Heating oes not
come on. No power to the thermostat. • Check for 24 Vac between R an W terminals (check for
750 mV on PowerPile® Systems).
— If missing 24 Vac:
— check if the circuit breaker is trippe —reset the circuit
breaker.
— check if the system fuse is blown—replace the fuse.
— check if the power switch on the HVAC equipment is in
the Off position—set to the On position.
— check wiring between thermostat an HVAC
equipment—replace any broken wires an tighten any
loose connections.
— If 24 Vac is present, procee with troubleshooting.
Thermostat minimum off time is
activate . Wait up to five minutes for the system to respon .
System selection is not set to
Heat. Set system selection to Heat.
Heating setpoint is below room
temperature. Check heating setpoint. Set heating setpoint to esire temperature.
Cooling oes not
come on. No power to the thermostat. • Check for 24 Vac between R or RC an Y terminals. — If missing 24 Vac:
— check if the circuit breaker is trippe —reset the circuit
breaker.
— check if the system fuse is blown—replace the fuse.
— check if the power switch on the HVAC equipment is in
the Off position—set to the On position.
— check wiring between thermostat an HVAC
equipment—replace any broken wires an tighten any
loose connections.
— If 24 Vac is present, procee with troubleshooting.
Thermostat minimum off time is
activate . • Wait up to five minutes for the system to respon .
• Enter Installer Setup number 33. Reconfigure minimum off
time (if require ).
System selection is not set to
Cool. Set system selection to Cool.
Cool setpoint is above room
temperature. Check cooling setpoint. Set cooling setpoint to esire temperature.
Heating or cooling
comes on
momentarily an
shuts off
Heat or cool circuit is opening
up or becoming high
impe ance.
A resistor in parallel with loa or install interface relay.
11 69-1509—2

T8602C CHRONOTHERM® IV DELUXE PROGRAMMABLE THERMOSTATS
Table 6. Troubleshooting Guide. (Continued)
Symptom Possible Cause Action
System on in icator
(flame=heat,
snowflake=cool) is
isplaye , but no
warm or cool air is
coming from the
registers.
Fan operation set for 0 (con
ventional heat) when it shoul
be set for 1 (electric heat).
Enter Installer Setup number 2 an reconfigure the fan
operation.
Conventional heating equipment
turns on the fan when the
furnace has
warme up to a setpoint.
Wait a minute after seeing the on in icator an then check the
registers.
Heating or cooling equipment is
not operating. Verify operation of heating or cooling equipment in self-test.
Out oor
temperature is not
isplaye a
Option not activate . Enter Installer Setup number 24 an set to 1.
Thermostat must have OT terminals an a C7089B1000
installe .
Out oor
temperature isplay
is incorrecta
Out oor sensor is connecte
incorrectly. Refer to C7089B1000 Installation Instructions an check wiring between the thermostat an sensor.
Wrong sensor. Replace sensor with C7089B1000 Sensor.
Thermostat
backlight appears
im.
Backlight can fa e over the life
of the batteries. • Wait until Replace Battery in icator is illuminate an replace batteries.
• Replace batteries now.
a Select mo els.
Honeywell
Automation and Control Solutions
Honeywell Honeywell Limite -Honeywell Limitée
1985 Douglas Drive North 35 Dynamic Drive
Gol en Valley, MN 55422 Scarborough, Ontario
M1V 4Z9
69-1509—2 GH. Rev. 12-02 ® Printed In U.S.A. on recycled
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