Honeywell T8611G Chronotherm User manual

® U.S. Registered Trademark
Copyright © 2003 Honeywell • • All Rights Reserved
INSTALLATION INSTRUCTIONS
69-1414-2
T8611G Chronotherm®
Deluxe Zoning
Heat Pump Thermostat
APPLICATION
The T8611G Chronotherm® Deluxe Zoning Heat Pump Thermostat provides electronic control of 24 Vac zoned heat
pump systems. Refer to Table 1 and Table 2 for a general description of the thermostat and zoning applications.
Table 1. Description of T8611 Thermostats.
Table 2. T8611 Zoning Applications.
MERCURY NOTICE
If this control is replacing a control that contains
mercury in a sealed tube, do not place your old
control in the trash. Dispose of properly.
Contact your local waste management authority
for instructions regarding recycling and the
proper disposal of the old control.
INSTALLATION
When Installing this Product...
1. Read these instructions carefully. Failure to follow
the instructions can damage the product or cause
a hazardous condition.
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable for
your application.
3. Installer must be a trained, experienced service
technician.
4. After completing installation, use these instructions
to check out the product operation.
Location
Install the thermostat about 1.5m (5 ft) above the floor in
an area with good air circulation at average temperature.
See Fig. 1.
Do not install the thermostat where it can be affected by:
— drafts, or dead spots behind doors and in corners.
— hot or cold air from ducts.
— radiant heat from sun or appliances.
— concealed pipes and chimneys.
— unheated (uncooled) areas such as an outside wall
behind the thermostat.
Wallplate Installation
The thermostat can be mounted horizontally on the wall
or on a 2 in. x 4 in. (50.8 mm x 101.6 mm) wiring box.
Position wallplate horizontally on the wall or on a
2 in. x 4 in. (50.8 mm x 101.6 mm) wiring box.
1. Position and level the wallplate (for appearance
only). The thermostat functions correctly even
when not level.
2. Use a pencil to mark the mounting holes.
See Fig. 2.
Model Power Method Changeover System Selection Fan Selection
T8611G2051 Hardwired Automatic or manual Heat-Off-Cool-Auto-Em. Heat On-Auto
Model TotalZone®EMM-3U EMM-3
T8611G2051 Yes Yes No

T8611G CHRONOTHERM® DELUXE ZONING HEAT PUMP THERMOSTAT
69-1414—2 2
Fig. 1. Typical location of thermostat.
Fig. 2. Mounting the wallplate.
3. Remove the wallplate from the wall and drill two
3/16 inch (76 mm holes) in the wall (if drywall) as
marked. For firmer material such as plaster, drill
two 7/32 inch (5.56 mm) holes. Gently tap anchors
(provided) into the drilled 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.
WIRING
All wiring must comply with local electrical codes and
ordinances. Refer to Fig. 3 and 4 for typical hookup. A
letter code is located near each terminal for identification.
CAUTION
Electrical Hazard.
Can cause electrical shock or equipment
damage.
Disconnect power before wiring.
1. Loosen the terminal screws on the wallplate and
connect the system wires. See Fig. 5.
IMPORTANT
Use 18 gauge, color-coded thermostat cable 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 pre-
vent drafts from affecting the thermostat.
The two OC terminals can be wired to the TZ-4 panel for
remote operation of the Zone-A-Lone feature during the
Leave and Sleep periods. See Table 9 and the TZ-4
Installation Instructions, form 68-0259, for more
information.
Fig. 3. Typical wiring diagram for EMM-3U panel.
5 FEET
[1.5 METERS]
YES NO
NO
NO
M1010
6
WIRES
THROUGH WALL
WALL
MOUNTING
HOLES
M15044
MOUNTING
SCREWS
WALL
ANCHORS (2)
NORMALLY, WIRE E ON THERMOSTAT TO W1/E ON PANEL;
ALTERNATIVELY, INSTALL JUMPER FROM E TO Y ON
THERMOSTAT AND OMIT WIRE TO W1/E ON PANEL.
CONNECT O/B JUMPER ON EMM-3U PANEL WHEN O/B TERMINAL ON
THERMOSTAT IS CONFIGURED AS O.
1
2
RE Y G O/BC W2 L OT OT
C7089B
OUTDOOR
TEMPERATUR
E
SENSOR
(OPTIONAL)
M2093
3
1
EMM-3U
THERMOSTAT
CONNECTORS
2
R
C
GW2Y2 M6M4M1Y1CRL
24 VAC
40 VA
O/BW1/E

T8611G CHRONOTHERM® DELUXE ZONING HEAT PUMP THERMOSTAT
3 69-1414—2
Fig. 4. Typical wiring diagram for T8611G on TotalZone® Control Panel.
Fig. 5. Correct wiring technique.
Mounting Thermostat
1. Engage tabs at the top of the thermostat and wall-
plate. See Fig. 6. Be sure to align subbase pins to
avoid damage to the thermostat.
2. Press lower edge of case to close and latch.
NOTE: To remove the thermostat from the wall, first pull
out at the bottom of the thermostat; remove top
last.
Fig. 6. Mounting thermostat on wallplate.
NORMALLY, WIRE E ON THERMOSTAT TO W1/E ON PANEL;
ALTERNATIVELY, INSTALL JUMPER FROM E TO Y ON
THERMOSTAT AND OMIT WIRE TO W1/E ON PANEL.
CONNECT O/B JUMPER ON TZ-4 PANEL WHEN O/B TERMINAL ON
THERMOSTAT IS CONFIGURED AS O.
CONNECT THE OC TERMINALS ONLY IF THE ZONE-A-LONE UNOCCUPIED
FEATURE IS DESIRED. SEE TZ-4 INSTALLER INSTRUCTIONS FOR EXPLANATION.
TZ-4
THERMOSTAT
CONNECTORS
1
2
3
2
C OC OC
E Y G O/BR W2 L OT OT
OC
OC
C7089B OUTDOOR
TEMPERATURE
SENSOR (OPTIONAL
)
M20932
1 3
M482
6
F
OR WRAPAROUND
I
NSERTION STRIP
7
/16 IN. (11 MM).
FOR STRAIGHT INSERTION
STRIP 5/16 IN. (8 MM).
M1463
4
PRESS LOWER
EDGE OF CASE
TO LATCH.
ENGAGE TABS
AT TOP OF
THERMOSTAT
AND WALLPLATE.
A.
B
.

T8611G CHRONOTHERM® DELUXE ZONING HEAT PUMP THERMOSTAT
69-1414—2 4
Fig. 7. T8611G key locations and descriptions.
Using Thermostat Keys
The thermostat keys are used to:
• set current day and time,
• program times and setpoints for heating and cooling,
• temporarily override program temperatures,
• display present setting,
• configure Installer Setup,
• check System-Test,
• display outdoor temperature,
• set the system operation,
• set the fan operation.
NOTE: Always press the keys with your fingertip or sim-
ilar blunt tool. Sharp instruments like a pen or
pencil point can damage the keyboard.
SETTINGS
System and Fan Settings
The system default setting is Heat and the fan default
setting is Auto. Use the System and Fan keys to change
the settings. See Fig. 8. The fan settings can be set for
each program period individually. The system selection is
for all the program periods.
System settings control thermostat operation:
Em Heat: L terminal is on continuously.Thermostat
cycles emergency heat and second stage of heat.
Cooling system is off. Compressor is de-energized.
Heat: Thermostat controls the heating.
Off: Both the heating and cooling are off.
Cool: Thermostat controls the cooling.
Auto (if selected): Thermostat automatically changes
between heating and cooling operation, depending
on the indoor temperature.
Fan settings control the system fan:
On: Fan operates continuously.
Auto: Fan operates with equipment.
NOTE: Always press the keys with you fingertip or simi-
lar blunt tool. Sharp instruments like a pen or
pencil point can damage the keyboard.
Temperature Settings
Refer to Table 3 for the default program. If the daytime
energy savings period is not used, press the period key
(Leave or Return) until the time is blank. See Owner’s
Guide, form number 69-1400, for complete instructions
on changing the program.
NOTE: For most applications, the thermostat factory-
settings do not require changing. Review the
factory settings in Table 3 and if no changes are
necessary, go to the Installer Self-Test section.
Fig. 8. T8611G System and Fan key locations.
M14624
Time Set Program
System Fan
Run
Program
Hold Temp
Set Current
Day/Time Wake Leave Return Sleep
Day Heat/Cool
Settings
Daylight
Time Copy
INCREASE TEMPERATURE
SETTING OR SCROLL
FORWARD THROUGH
INSTALLER SETUP OPTIONS
DECREASE TEMPERATURE
SETTING OR SCROLL
BACKWARD THROUGH
INSTALLER SETUP OPTION
S
DISPLAY INFORMATION
SUCH AS PRESENT
SETTINGS AND OUTDOOR
TEMPERATURE
RETURN TO
NORMAL
OPERATIONS
ENTER
INDEFINITE
OR TIMED
HOLD MODE
SET CURRENT
DAY AND TIME
SET CURRENT OR
PROGRAM DAY
CHANGE BETWEEN
DAYLIGHT SAVINGS
AND STANDARD TIME
I
NCREASE TIME SETTING
O
R SCROLL FORWARD
T
HROUGH INSTALLER SETUP
A
ND SYSTEM TEST
DECREASE TIME SETTING OR
SCROLL BACKWARD THROUGH
INSTALLER SETUP AND SYSTEM TEST
COPY ONE PROGRAMMED
DAY TO ANOTHER DAY
SET WAKE TIMES
AND SETPOINTS
CHANGE BETWEEN
HEATING AND COOLING
SETPOINTS
SET LEAVE TIMES
AND SETPOINTS SET RETURN TIMES
AND SETPOINTS
SET SLEEP TIMES
AND SETPOINTS
SELECT SYSTEM
OPERATION
SELECT FAN
OPERATION
M14625
HoldTemp
Run
Program
Copy
Daylight
Time
Set Current
Day/Time
System Fan
Time Set Program
Day System
Fan
Wake Leave Return Sleep
Heat/Cool
Settings

T8611G CHRONOTHERM® DELUXE ZONING HEAT PUMP THERMOSTAT
5 69-1414—2
INSTALLER SETUP
The Installer Setup is used to customize the thermostat
to specific systems. Some of the options include
temperature display, changeover, and outdoor
temperature display. Installer Setup numbers are listed in
Table 4. The table includes all the configuration options
and the factory settings for the T8611.
Table 3. Default Program Settings.
A combination of key presses are required to use the
Installer Setup feature:
— To enter the installer setup, press and hold the
information ikey with the increase and decrease 
keys until the first number is displayed. All display
segments appear for approximately three seconds
before the number is displayed. See Fig. 9 and 10.
— To advance to the next Installer Setup, press the
Time ∆key.
— To change a setting, use the increase or
decrease  key.
— To scroll the Installer Setup numbers backward, press
the Time ∇key.
— To exit the Installer Setup, press Run Program.
Fig. 9. Display of all LCD segments.
Fig. 10. Display of Installer Setup
number and setting.
IMPORTANT
Only configurable numbers are shown on the
device. Review Table 4 factory-settings and
mark any desired changes in the Actual Setting
column. When Installer Setup is complete,
review the settings to confirm that they match
the system.
Period Time
Heat
Setpoint
Cool
Setpoint
Fan
Setting
Wake 6:00 AM 70°F
(21°C)
78°F
(25.5°C)
Auto
Leave 8:00AM 62°F
(16.5°C)
85°F
(29.5°C)
Auto
Return 5:00 PM 70°F
(20°C)
78°F
(25.5°C)
Auto
Sleep 10:00 PM 62°F
(16.5°C)
82°F
(28°C)
Auto
M1455
9
Aux Ht
Set Day/TimeSet Program
Mon
Wake Leave Return Sleep OutdoorRoom
Filter
Wait
System
Fan
Em Hea
t
On
Auto
Of
f
Coo
l
Auto
AM
PM
Hold for
Heat Cool
Repl Batt
Recovery
DST
TueWedThu Fri Sat Sun
Days
Temporary Setting
Em Ht
M14618
INSTALLER SETUP
NUMBER DISPLAY
(COLUMN 2 OF TABLE 3)
FACTORY SETTING OR OTHER
CHOICE DISPLAY (COLUMN 3
OR 5 OF TABLE 3)
Table 4. Thermostat Installer Setup Options.
Select
Installer Setup
Number (Press
Time ∆key to
change)
Factory Setting
Other Choices
(Press or key to change)
Actual
SettingDisplay Description Display Description
Not Used. 1 thru 4 — — — — —
Heating cycle
ratea
5 6 Stage 2 3 or 9 3—3 cph (factory setting for
first stage of heat)
6—6 cph used for second
stage of heat
9—9 cph used for electric
heat
6 (Not Used). — — — —
7 9 Emergency heat 3 or 6
Not Used. 8 thru 11 — — — — —
System setting
adjustment
12 1 Manual
changeover
0 or 2 0—Auto changeover.
2—Fixed auto changeover.
Adaptive
Intelligent
Recovery™
control.
13 0 Adaptive Intelligent
Recovery™
control is activated
(system starts
early so setpoint is
reached by start of
program period).
1 Conventional recovery
(system starts recovery at
programmed time).
—

T8611G CHRONOTHERM® DELUXE ZONING HEAT PUMP THERMOSTAT
69-1414—2 6
Degree
temperature
display
14 0 Temperature is
displayed in °F
1 Temperature is displayed in
°C
Not Used. 15 — — — — —
Clock format. 16 0 12-hour clock
format.
1 24-hour clock format.
Not Used. 17 and 18 — — — — —
Extended fan
operation in
heating.
19 0 No extended fan
operation after the
call for heat ends.
1 Fan operation is extended
90 seconds after the call for
heat ends.
Extended fan
operation in
cooling.
20 No extended fan
operation after the
call for cool ends.
1 Fan operation is extended
90 seconds after the call for
cool ends.
Not Used. 21 thru 23 — — — — —
Outdoor
temperature
display (models
with OT
terminals).
24 0 No outdoor
temperature is
displayed.
1 Outdoor temperature is
displayed. Needs a
C7089B1000 Outdoor
Temperature Sensor to
operate.
Not Used. 25 thru 28 — — — — —
O/B terminal
energized in
heating or
cooling.
29 0 O/B terminal
energized for
reversing valve in
cooling.
1 O/B terminal energized for
reversing valve in heating
Deadband 30 3 Heating and
cooling setpoints
can be set no
closer than 3°F
(1.5°C).
2 thru 10 Heating and cooling
setpoints can be set no
closer than the chosen
value:
2—2°F (2°C)
4—4°F (2°C)
5—5°F (2.5°C)
6—6°F (3°C)
7—7°F (3.5°C)
8—8°F (4°C)
9—9°F (4.5°C)
10—10°F (5°C)
Not Used. 31 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 90 Highest heating
setpoint setting.
40 to 89 Temperature range (1°F
increments) of heating
setpoint settings.
Temperature
range stops in
cooling.
35 45 Lowest cooling
setpoint setting.
46 to 99 Temperature range (1°F
increments) of cooling
setpoint settings.
System on
indicator
(flame=heat,
snowflake=
cool) is
displayed.
36 0 LCD on symbol is
displayed when
system is
energized
1 Icons in display are
disabled.
—
Table 4. Thermostat Installer Setup Options. (Continued)
Select
Installer Setup
Number (Press
Time ∆key to
change)
Factory Setting
Other Choices
(Press or key to change)
Actual
SettingDisplay Description Display Description

T8611G CHRONOTHERM® DELUXE ZONING HEAT PUMP THERMOSTAT
7 69-1414—2
IMPORTANT
Review the settings to confirm that they match
the system. Press Run Program to exit the
Installer Setup. The thermostat has saved the
Installer Setup changes and initiated a reset in
order to operate using the new settings. Be sure
to set the current day and time immediately.
Temperature
display
adjustment.
37 0 No difference in
displayed
temperature and
actual room
temperature.
3 thru -3
or
1.5 thru
-1.5
1 (0.5)—Display adjusts to
1°F (0.5°C) higher than
actual room temperature.
2 (1.0)—Display adjusts to
2°F (1.0°C) higher than
actual room temperature.
3 (1.5) —Display adjusts to
3°F (1.5°C) higher than
actual room temperature.
-1 (-0.5) —Display adjusts to
-1°F (-0.5°C) lower than
actual room temperature.
-2 (-1.0) —Display adjusts to
-2°F (-1.0°C) lower than
actual room temperature.
-3 (-1.5) —Display adjusts to
-3°F (-1.5°C) lower than
actual room temperature.
Furnace Air
Filter Timer.
43 2 30 days (System
run time)
0, 1, 3, 4 0 – off
1 – 10 days
3 – 60 days
4 – 120 days
(Time is counted when heat,
cool or fan is running.)
Humidifier Pad
Monitor.
44 0 Off 1, 2, 3 1 – 90 days
2 – 180 days
3 – 365 days
(Time is counted by calendar
days in heat mode.)
Ultraviolet (UV)
Air Treatment
System Lamp
Monitor.
45 0 Off 1 1 – 365 days
(Time is counted by calendar
days in any mode.)
Table 4. Thermostat Installer Setup Options. (Continued)
Select
Installer Setup
Number (Press
Time ∆key to
change)
Factory Setting
Other Choices
(Press or key to change)
Actual
SettingDisplay Description Display Description

T8611G CHRONOTHERM® DELUXE ZONING HEAT PUMP THERMOSTAT
69-1414—2 8
Setting Current Day and Time
1. Press Set Current Day/Time.
NOTE: On initial powerup or after an extended power
loss, 1:00 pm flashes on the display until a key
is pressed.
2. Press Day until the current day is displayed.
NOTE: Sun=Sunday, Mon=Monday,
Tue=Tuesday, Wed=Wednesday,
Thu=Thursday, Fri=Friday, Sat=Saturday.
3. Press Time ∆or Time ∇until the current time is dis-
played.
NOTE: Tapping the Set Current Day/Time changes the
time in one-hour increments.
NOTE: If the current time is Daylight Savings Time,
press Daylight Time until DST is displayed.
4. Press Run Program.
View or Reset Timer Settings
When the thermostat activates a timer, the thermostat
flashes Filter until the timer resets.
1. Reset the timer by pressing the ikey until the
expired timer is displayed.
2. Press the Time ∆key to reset the timer.
3. Press the Run Program key.
NOTE: You can view the number of days remaining at
any time by pressing the i key three or four
times. If more than one timer is active, all active
timers show sequentially when pressing the
i key several times.
M1461
9
Time Set Program
System Fan
Run
Program
Hold Temp
Set Current
Day/Time
Set Current
Day/Time Wake Leave Return Sleep
Day Heat/Cool
Settings
Daylight
Time Copy
Set Day/Time
Mon
PM
M1462
0
Time Set Program
System Fan
Run
Program
Hold Temp
Set Current
Day/Time Wake Leave Return Sleep
Day
Day Heat/Cool
Settings
Daylight
Time Copy
Set Day/Time
PM
Tue
M1462
1
Time Set Program
System Fan
Run
Program
Hold Temp
Set Current
Day/Time Wake Leave Return Sleep
Day
Time
Heat/Cool
Settings
Daylight
Time Copy
Set Day/Time
AM
Tue
M1462
2
Time Set Program
System Fan
Run
Program
Hold Temp
Set Current
Day/Time Wake Leave Return Sleep
Day Heat/Cool
Settings
Daylight
Time
Daylight
Time
Copy
Set Day/Time
AM
DST
Tue
M1462
3
Time Set Program
System Fan
Run
Program
Run
Program Hold Temp
Set Current
Day/Time Wake Leave Return Sleep
Day Heat/Cool
Settings
Daylight
Time Copy Wake Room
System
Fan
Heat
Auto
AM
DST
Tue
M2024
3
Filter Days
M2024
4
Filter Days

T8611G CHRONOTHERM® DELUXE ZONING HEAT PUMP THERMOSTAT
9 69-1414—2
INSTALLER SELF-TEST
Use the Installer Self-Test to check the thermostat
operation. Refer to Table 5 for a list of the available
self-tests.
Table 5. Tests Available In Installer Self-Test.
CAUTION
Equipment Damage Hazard.
Minimum compressor off-time is bypassed
during the Installer System Test.
Avoid cycling compress quickly.
To start the system test:
Press and hold the increase and decrease keys at
the same time until 10 appears. All segments of the
display are displayed before the 10 appears.
See Fig. 10 and 11.
Fig. 11. Display of all LCD segments.
Fig. 12. Display of test number.
Refer to Table 6 for the directions and results of the
specific tests.
NOTE: Press Time ∆to advance to the next test and
Time ∇to go back to the previous test. Press
Run Program to exit the system test.
Test
Number System Test Description
10-19 Heating equipment can be turned on and off.
20-29 Emergency heat equipment can be turned
on and off.
30-39 Cooling equipment can be turned on and off.
40-49 Fan equipment can be turned on and off.
60 0 to
60 19
Keyboard keys test.
70-79 Thermostat information including date code
and software versions are displayed.
M1455
9
Aux Ht
Set Day/TimeSet Program
Mon
Wake Leave Return Sleep OutdoorRoom
Filter
Wait System
Fan
Em Hea
t
On
Auto
Of
f
Coo
l
Auto
AM
PM
Hold for
Heat Cool
Repl Batt
Recovery
DST
TueWedThu Fri Sat Sun
Days
Temporary Setting
Em Ht
M1461
2
Table 6. Installer System Test Options.
Keys to
Press
Test
Number Description
Heating Equipment Self-Test
Time ∆10 Enter heating equipment self-test.
11 Stage-one heat comes on. The system fan is also energized.
12 Stage-two heat comes on. Stage-one heat and system fan remain on.
11 Stage-two heat turns off.
10 Stage-one heat and system fan turn off.
Emergency Heating Equipment Self-Test
Time ∆20 Change from heating to emergency heating equipment self-test.
21 Emergency heat and system fan come on.
22 Stage 2 heat comes on.
21 Stage 2 heat turns off.
20 Emergency heat and system fan turn off.
Cooling Equipment Self-Test
Time ∆30 Change from heating or emergency heating to cooling equipment self-test.
31 Cool and system fan come on.
30 Cool and system fan turn off.
Fan Equipment Self-Test
Time ∆40 Change from cooling to fan equipment self- test.

T8611G CHRONOTHERM® DELUXE ZONING HEAT PUMP THERMOSTAT
69-1414—2 10
NOTE: Press any key and the displayed numbers will change. Press Time ∇to go to the previous test and Time ∆to
go to the next test. The Run Program key does not exit this test. Press Time ∆or Time ∇and then the Run
Program key to exit.
THERMOSTAT INFORMATION
1. Press the Time ∆key to access the thermostat
information.
2. Press the increase key to display the production
date code. The first two large digits are the month
and the third digit is the last digit of the year.
(Example: 027 = February 1997).
3. Press the increase key again to display the
software identification code.
(Example: 02 = software ID code 2).
sy
4. Press the increase key again to display the soft-
ware revision number. (Example: 001 = Revision
number 1).
5. Press the increase key again to display the
EEPROM identification code. (Example: 314 =
EEPROM ID 314)
6. Press the Run Program key to exit the self- test.
The self- test times out after four minutes without
any key presses.
CHECKOUT
Outdoor Temperature Sensor
Allow the outdoor temperature sensor to absorb the
outdoor air for a minimum of five minutes before taking a
reading.
41 Fan comes on.
40 Fan turns off.
Key Operation Self-Test
Time ∆60 2 Change from fan to key operation self-test.
Table 6. Installer System Test Options. (Continued)
Keys to
Press
Test
Number Description
M1461
3
M1461
4
M1461
5
M1461
6
M1461
7

T8611G CHRONOTHERM® DELUXE ZONING HEAT PUMP THERMOSTAT
11 69-1414—2
TROUBLESHOOTING GUIDE (TABLE 7)
Table 7. Troubleshooting Guide.
Symptom Possible Cause Action
Display does not
come on.
Thermostat is not being
powered.
• Check for 24 Vac between R and C terminals.
— If missing 24 Vac:
— verify that the thermostat is correctly wired to the zone
control panel.
— R on thermostat to R on the TZ-3 and C to M1.
— R on thermostat to R on the EMM-3U and TZ-4 and
C to C.
— verify that the thermostat is correctly wired to the zone
control panel.
—replace any broken wires and tighten any loose
connections.
— If 24 Vac is present, proceed with troubleshooting
Thermostat is not fully
connected to wallplate.
Verify that thermostat is correctly positioned and securely
latched to wallplate.
Temperature
display is incorrect.
Room temperature display has
been reconfigured.
Enter Installer Setup number 37 and reconfigure the display.
Thermostat is configured for °F
or °C display.
Enter Installer Setup number 14 and reconfigure the display.
Bad thermostat location. Relocate the thermostat.
Temperature
settings do not
change. (Example:
Cannot set the
heating higher or
the cooling lower.)
The upper or lower temperature
limits were reached.
Check the temperature setpoints:
• Heating limits are 40 to 90°F (4.5 to 32°C).
• Cooling limits are 48 to 99°F (7 to 37°C).
The setpoint temperature range
stops were configured.
Check Installer Setup numbers 34 and 35 and reconfigure the
setpoint stops.
Heating or cooling
does not come on.
No power to the thermostat. Use action listed under “Display will not come on.”
Thermostat minimum off time is
activated.
Wait up to five minutes for the system to respond.
Enter Installer Setup number 33.
Reconfigure the minimum off time, if required.
System selector is set to off. Verify that the system selector is set for Heat, Cool or Auto.
Thermostat is not calling for
heat or cool.
Verity that the heat or cool icon (flame or snowflake) is present.
If not, raise or lower the setpoint to make a call for cool or heat.
System on indicator
(flame=heat,
snowflake=cool) is
displayed, but no
warm or cool air is
coming from the
registers.
Thermostat is not wired
correctly to the zone panel.
Verify wiring. Check if other zones can bring on the heat or cool.
Zone panel is not correctly
configured or wired correctly.
If no zones can bring on the heat, verify equipment configuration
and wiring.
Outdoor tempera-
ture not displayeda
Option not activated. Enter Installer Setup number 24 and set to 1. Thermostat must
have OT terminals and a C7089B1000 installed.
Outdoor
temperature
display is incorrecta
Outdoor sensor is connected
incorrectly.
Refer to C7089B1000 Installation Instructions and check wiring
between the thermostat and sensor.
Wrong sensor. Replace sensor with C7089B1000 Sensor.
aSelect models.

69-1414—2 G.H. Rev. 1-03 www.honeywell.com/yourhome
T8611G CHRONOTHERM® DELUXE ZONING HEAT PUMP THERMOSTAT
Printed in U.S.A. on recycled
paper containing at least 10%
post-consumer paper fibers.
Automation and Control Solutions
Honeywell International Inc. Honeywell Limited-Honeywell Limitée
1985 Douglas Drive North 35 Dynamic Drive
Golden Valley, MN 55422 Scarborough, Ontario
M1V 4Z9
Table 8. T8611G2051 Sequence of Operation.
Table 9. Occupied Terminal Operation.
Fan
Selection System Selection Call Energize Display****
AUTO OFF None None None
AUTO OFF Fan G Fan Symbol
ON OFF None G Fan Symbol
AUTO COOL None O* None
AUTO COOL or AUTO Cooling O, G, Y Snowflake Symbol,
Fan Symbol
AUTO HEAT or AUTO None B* None
AUTO HEAT or AUTO Stage 1 Heating B, Y Flame Symbol,
Fan Symbol
AUTO HEAT or AUTO Stage 2 Heating B, Y, W2 Flame Symbol,
Fan Symbol,
AUX. HEAT
AUTO EM. HEAT None L EM. HEAT
AUTO EM. HEAT Stage 1 Heating L, E Flame Symbol,
Fan Symbol,
EM. HEAT
AUTO EM. HEAT Stage 2 Heating L, E, W2 Flame Symbol,
Fan Symbol,
EM. HEAT,
AUX. HEAT
AUTO AUTO None O**, B*** None
SYSTEM and FAN selection identified on the LCD.
* = Thermostat O/B terminal is configurable for heating or cooling changover.
** = O is energized when cooling was last call from thermostat.
*** = B is energized when heating was last call from thermostat.
**** = Installer setup mode 36 disables flame and snowflake icons from display.
Mode OC Contacts Closed Display
Wake No None
Leave Yes None
Return No None
Sleep Yes None