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.
T8611G2051HardwiredAutomatic or manualHeat-Off-Cool-Auto-Em. HeatOn-Auto
Table 2. T8611 Zoning Applications.
ModelTotalZone®EMM-3UEMM-3
T8611G2051YesYesNo
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.
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.
®
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
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.
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
YES
NO
NO
5 FEET
NO
[1.5 METERS]
(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. 1. Typical location of thermostat.
WALL
MOUNTING
SCREWS
M15044
WALL
ANCHORS (2)
WIRES
THROUGH WALL
Fig. 2. Mounting the wallplate.
MOUNTING
HOLES
M1010
2
R
NORMALLY, WIRE E ON THERMOSTAT TO W1/E ON PANEL;
1
ALTERNATIVELY, INSTALL JUMPER FROM E TO Y ON
THERMOSTAT AND OMIT WIRE TO W1/E ON PANEL.
2
CONNECT O/B JUMPER ON EMM-3U PANEL WHEN O/B TERMINAL ON
THERMOSTAT IS CONFIGURED AS O.
R SCROLL FORWARD
HROUGH INSTALLER SETUP
ND SYSTEM TEST
SET CURRENT
DAY AND TIME
RETURN TO
NORMAL
OPERATIONS
ENTER
INDEFINITE
OR TIMED
HOLD MODE
SET CURRENT OR
PROGRAM DAY
CHANGE BETWEEN
DAYLIGHT SAVINGS
AND STANDARD TIME
SET WAKE TIMES
AND SETPOINTS
Set Current
Run
Day/Time
Program
Hold Temp
Day
Daylight
Time
COPY ONE PROGRAMMED
DAY TO ANOTHER DAY
SET LEAVE TIMES
AND SETPOINTS
TimeSet Program
Heat/Cool
Settings
Copy
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
SET RETURN TIMES
AND SETPOINTS
Leave
Wake
DECREASE TIME SETTING OR
SCROLL BACKWARD THROUGH
INSTALLER SETUP AND SYSTEM TEST
ReturnSleep
SystemFan
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.
INCREASE TEMPERATURE
SETTING OR SCROLL
FORWARD THROUGH
INSTALLER SETUP OPTIONS
DECREASE TEMPERATURE
SETTING OR SCROLL
BACKWARD THROUGH
INSTALLER SETUP OPTION
DISPLAY INFORMATION
SUCH AS PRESENT
SETTINGS AND OUTDOOR
TEMPERATURE
SET SLEEP TIMES
AND SETPOINTS
SELECT FAN
OPERATION
SELECT SYSTEM
OPERATION
CHANGE BETWEEN
HEATING AND COOLING
SETPOINTS
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.
M14624
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
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.
PeriodTime
Wake6:00 AM70°F
Leave8:00AM62°F
Return 5:00 PM70°F
Sleep10:00 PM62°F
A combination of key presses are required to use the
Installer Setup feature:
— To enter the installer setup, press and hold the
information i key 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.
Heat
Setpoint
(21°C)
(16.5°C)
(20°C)
(16.5°C)
Cool
Setpoint
78°F
(25.5°C)
85°F
(29.5°C)
78°F
(25.5°C)
82°F
(28°C)
Fan
Setting
Auto
Auto
Auto
Auto
— To exit the Installer Setup, press Run Program.
Wait
Recovery
Hold for
Filter
Em Ht
Mon
TueWed Thu Fri Sat Sun
Wake Leave Return Sleep
Set Day/TimeSet Program
Aux Ht
Days
AM
PM
Temporary Setting
Repl Batt
DST
Heat
OutdoorRoom
Cool
Fig. 9. Display of all LCD segments.
INSTALLER SETUP
NUMBER DISPLAY
(COLUMN 2 OF TABLE 3)
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.
FACTORY SETTING OR OTHER
CHOICE DISPLAY (COLUMN 3
OR 5 OF TABLE 3)
System
Em Hea
Fan
M1455
M14618
Coo
Auto
Auto
Of
On
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
SettingDisplayDescriptionDisplayDescription
Not Used.1 thru 4—————
Heating cycle
a
rate
56Stage 23 or 93—3 cph (factory setting for
6 (Not Used).————
79Emergency heat3 or 6
first stage of heat)
6—6 cph used for second
stage of heat
9—9 cph used for electric
heat
Not Used.8 thru 11—————
System setting
adjustment
Adaptive
Intelligent
Recovery™
control.
121Manual
130Adaptive Intelligent
changeover
Recovery™
control is activated
(system starts
early so setpoint is
reached by start of
program period).
Ultraviolet (UV)
Air Treatment
System Lamp
Monitor.
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.
3. Press Time ∆ or Time ∇ until the current time is dis-
NOTE: Tapping the Set Current Day/Time changes the
Program
Heat/Cool
Hold Temp
System Fan
Day
Settings
Daylight
Copy
Time
played.
time in one-hour increments.
PM
Tue
M1462
Daylight
4. Press Run Program.
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 i key until the
2. Press the Time ∆ key to reset the timer.
Run
Program
Hold Temp
Time
Run
Program
Run
Hold Temp
expired timer is displayed.
Filter
Set Current
Day/Time
Day
Daylight
Time
Set Current
Day/Time
Day
Daylight
Time
TimeSet Program
Leave
Wake
Heat/Cool
Settings
Copy
TimeSet Program
Leave
Wake
Heat/Cool
Settings
Copy
Days
Return Sleep
System Fan
Return Sleep
System Fan
Set Day/Time
AM
Tue
Tue
Wake
DST
M1462
System
AM
DST
Heat
Fan
Room
Auto
M1462
M2024
Time
Set Day/Time
TimeSet Program
Set Current
Run
Leave
Wake
Return Sleep
Day/Time
Program
Heat/Cool
Hold Temp
NOTE: If the current time is Daylight Savings Time,
press Daylight Time until DST is displayed.
System Fan
Day
Settings
Daylight
Copy
Time
AM
Tue
M1462
69-1414—28
Filter
Days
M2024
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.
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.
Tes t
NumberSystem Test Description
10-19Heating equipment can be turned on and off.
20-29Emergency heat equipment can be turned
on and off.
30-39Cooling equipment can be turned on and off.
40-49Fan equipment can be turned on and off.
60 0 to
60 19
70-79Thermostat information including date code
Keyboard keys test.
and software versions are displayed.
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.
Table 6. Installer System Test Options.
Keys to
Press
Heating Equipment Self-Test
Time ∆10Enter heating equipment self-test.
Emergency Heating Equipment Self-Test
Time ∆20Change from heating to emergency heating equipment self-test.
Cooling Equipment Self-Test
Time ∆ 30Change from heating or emergency heating to cooling equipment self-test.
Fan Equipment Self-Test
Time ∆40Change from cooling to fan equipment self- test.
Tes t
NumberDescription
11Stage-one heat comes on. The system fan is also energized.
12Stage-two heat comes on. Stage-one heat and system fan remain on.
11Stage-two heat turns off.
10Stage-one heat and system fan turn off.
21Emergency heat and system fan come on.
22Stage 2 heat comes on.
21Stage 2 heat turns off.
20Emergency heat and system fan turn off.
31Cool and system fan come on.
30Cool and system fan turn off.
Wait
Recovery
Hold for
Filter
Mon
TueWed Thu Fri Sat Sun
Wake Leave Return Sleep
Em Ht
Set Day/TimeSet Program
Aux Ht
Days
AM
PM
Temporary Setting
Repl Batt
DST
Heat
OutdoorRoom
Cool
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.