Page 1
TH8110U Touch Screen
Programmable Thermostats
INSTALLATION INSTRUCTIONS
APPLICATION
The TH8110U Universal Programmable Thermostats provide electronic control of 24 Vac heating and cooling systems
or 750 mV heating system. See Table 1 for a general description.
Table 1. TH811 Thermostats Description.
Model
TH8110U Batteries or
RECYCLE 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
Power
Method Changeover System Selection Fan Selection Comments
common wire
Automatic or
manual
selectable
Heat-Off-Cool-Auto On-Auto-Circ System and Fan
NO
NO
selection vary based on
system type
NO
YES
5 FEET
[1.5 METERS]
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 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.
Selecting Location
Install the thermostat about 5 ft. (1.5m) above the floor in
an area with good air circulation at average temperature.
See Fig. 1.
® U.S. Registered Trademark
Copyright © 2004 Honeywell International Inc. • • All Rights Reserved
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.
M19925
Fig. 1. Selecting thermostat location.
69-1700
Page 2
TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS
CO
L
SC
S
H
UMP
S1
2
C
G
C
Installing Wallplate
CAUTION
Electrical Hazard.
Can cause electrical shock or equipment
damage.
Disconnect power before wiring.
The thermostat can be mounted horizontally on the wall
or on a 4 in. x 2 in. (101.6 mm x 50.8 mm) wiring box.
1. Position and level the wallplate (for appearance
only).
2. Use a pencil to mark the mounting holes.
WALL
WIRES THROUGH WALL
AND WIRE SLOT
WALL ANCHORS (2)
MOUNTING
HOLES
MOUNTING
SCREWS (2)
Fig. 2. Mounting wallplate.
3. Remove the wallplate from the wall and, if drywall,
drill two 3/16-in. holes in the wall, as marked. For
firmer material such as plaster, drill two 7/32-in.
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. See Fig. 2.
5. Insert the mounting screws into the holes and
tighten.
M19916
3. Securely tighten each screw.
4. Push excess wire back into the hole.
5. Plug the hole with nonflammable insulation to
prevent drafts from affecting the thermostat.
EAT P
NVENTIONA
Y2
L
E
AUX
S1
S2
Fig. 3. Selecting terminal identifications for
Table 2. Selecting Terminal Identifications for
W2
S
system type.
System Type.
System Type
R
W
Y
REW TERMINAL
Wallplate
Terminal
Identifications
RC
R
O/B
Y
G
C
M19951
Wiring
Diagram
Reference
Standard Heat/Cool Conventional 5, 6
Heat Only Conventional 7
Heat Only with Fan Conventional 8
Heat Only Series 20 Conventional 9
Cool Only Conventional 10
Heat Pump with No
Auxiliary Heat
Heat Pump 11
WIRING (FIG. 5-11)
All wiring must comply with local electrical codes and
ordinances.
1. Select set of terminal identifications (Table 2) that
corresponds with system type (conventional or
heat pump) in Fig. 3.
2. Loosen the screws for the appropriate system type
selected; see Table 2. Insert wires in the terminal
block under the loosened screw. See Fig. 4.
69-1700 2
Fig. 4. Inserting wires in terminal block.
IMPORTANT
Use 18 gauge thermostat wire.
M19917
Page 3
TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS
CONVENTIONAL
RC
Y2
W2
S1
S2
3
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
FACTORY INSTALLED JUMPER.
3
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE
ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE
FROM THE THERMOSTAT CABLE.
Fig. 5. Typical hookup of conventional single-stage
heat and cool system with single transformer
Y2
W2
S1
S2
3
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
REMOVE FACTORY INSTALLED JUMPER.
3
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE
ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE
FROM THE THERMOSTAT CABLE.
2
R
W
Y
G
C
CONNECTION
FAN
RELAY
COMPRESSOR
CONTACTOR
HEAT RELAY
(1H/1C conventional).
CONVENTIONAL
RC
2
R
W
Y
G
C
CONNECTION
FAN
RELAY
COMPRESSOR
CONTACTOR
HEAT RELAY
OPTIONAL
24 VAC
COMMON
OPTIONAL
24 VAC
COMMON
M19895
M19896
CONVENTIONAL
RC
1
R
C
Y2
W2
S1
S2
3
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
FACTORY INSTALLED JUMPER.
3
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE
ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE
FROM THE THERMOSTAT CABLE.
Fig. 7. Typical hookup of heat-only system
Y2
1
R
C
1
C
R
OUTDOOR/INDOOR
1
2
3
W2
S1
S2
3
TEMPERATURE
SENSOR
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
FACTORY INSTALLED JUMPER.
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE
ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE
FROM THE THERMOSTAT CABLE.
Fig. 8. Typical hookup of heat only system with fan
2
R
W
Y
G
C
HEAT RELAY
(1H conventional).
CONVENTIONAL
RC
2
R
W
Y
G
C
FAN
RELAY
HEAT RELAY
(1H conventional).
CONNECTION
OPTIONAL
24 VAC
COMMON
OPTIONAL
24 VAC
COMMON
CONNECTION
1
R
C
M19897
1
R
C
M19898
Fig. 6. Typical hookup of conventional single-stage
heat and cool system with two transformers
(1H/1C conventional).
3 69-1700
Page 4
TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS
CONVENTIONAL
RC
Y2
W2
S1
S2
3
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
FACTORY INSTALLED JUMPER.
3
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE
ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE
FROM THE THERMOSTAT CABLE.
2
R
W
Y
G
C
W BR
SERIES 20
MOTOR OR
TR
TR
1
VALVE
M19899
Fig. 9. Typical hookup of heat only Series 20 system.
HEAT PUMP
Y2
L
E
AUX
S1
S2
4
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
1
FACTORY INSTALLED JUMPER.
2
"O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B" IN THE INSTALLER SETUP.
3
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS.
4
WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE.
R
C
CONVENTIONAL
RC
Y2
W2
S1
S2
3
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
FACTORY INSTALLED JUMPER.
3
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE
ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE
FROM THE THERMOSTAT CABLE.
Fig. 10. Typical hookup of cool only system
RC
2
R
O/B
3
2
R
W
Y
G
C
FAN
RELAY
COMPRESSOR
CONTACTOR
(1C conventional).
1
OPTIONAL
CONNECTION
R
C
Y
G
OPTIONAL
24 VAC
C
COMMON
CONNECTION
FAN RELAY
CHANGEOVER
VALVE
COMPRESSOR
24 VAC
COMMON
M19903
1
R
C
M19900
Fig. 11. Typical hookup of single-stage heat pump with no auxiliary/backup heat (1H/1C heat pump).
Powering the Thermostat
There are two different ways to power the thermostat:
• Batteries (three AAA alkaline).
• 24 Vac Common wire.
Wiring 24 Vac Common
Wire the common side of the transformer to the C screw
of the thermostat wallplate. When installing in a single
transformer system, keep jumper wire between the R
and Rc screws. When installed in a two-transformer
69-1700 4
system, use the common from the cooling transformer to
connect to C screw and remove the jumper wire between
the R and Rc screws.
Inserting Batteries (Optional)
If not using a 24 Vac Common to power the thermostat,
install three AAA alkaline batteries (included) in the back
of the thermostat. Make sure the positive and negative
terminals are oriented correctly, as marked on the device.
See Fig.12.
Page 5
TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS
E
MON
UE
THUSASUN
E
MON
THUSASUN
CHANGE FILTER UV LAMP HUMIDIFIER PAD
OK TO PICK MULTIPLE DAYS SCREEN LOCKED
USE ARROWS TO SET YEAR AND TIME
R
U
BATTERIES (3)
M19918
Fig. 12. Installing batteries on thermostat back.
Mounting the Thermostat
1. Align the terminal screw blocks with the pins on the
back of the thermostat.
2. Push the thermostat straight onto the wallplate.
See Fig. 13.
WALL
REMOVE TAB TO ACTIVATE REAL TIME CLOCK
INSTALLATION
REMOVE DURING
INSTALLATION
REMOVE DURING
M19920
Fig. 14. Removing tab to activate real-time clock.
This thermostat is designed to automatically keep current
time and day in memory for up to ten years under normal
use after calendar is set. When thermostat is first
powered, display is ready to enter calendar date (Fig.15).
SET CURRENT DAY
SET MONTH
T
DON
INSTALLATION
REMOVE DURING
Fig. 13. Mounting thermostat on wallplate.
Adjusting Real-Time Clock
Setting Calendar and Time
Locate and remove the tab labeled Remove in the lower
left corner on the thermostat back. The tab must be
removed to activate the real-time clock. See Fig. 14.
M19919
DON
M19921
Fig. 15. Setting calendar and time after initial
IMPORTANT
The tab on back of thermostat in lower-left
corner must be removed to activate this feature.
powerup.
Using the Thermostat
The thermostat has a touch screen interface. Words or
symbols appear, highlighting keys, as needed, to
complete tasks. Press keys with your fingertips. Sharp
tips on pens or pencils can damage thermostat.
1. Use arrow keys to set Year, Month and Day (see
Fig. 15).
2. Press Done key.
3. Use arrow keys to set current time. See Fig. 15.
4. Press Done key.
5 69-1700
Page 6
TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS
E
MON
UE
THUSASUN
SYSTEM
OFF
COOL
g
Schedule
de
Se
o
DONE
MON
THUSASUN
A
OPERATION
System and Fan Settings
The System default setting is Heat and the Fan default
setting is Auto.
SYSTEM Settings
Heat: Thermostat controls heating system.
Off: Both heating and cooling are off.
Cool: Thermostat controls cooling system.
Auto: Thermostat automatically changes between
heating and cooling systems, depending on indoor
temperature. (See Installer Setup section.)
FAN Settings
The Fan setting can be programmed into the thermostat
schedule for each period (Wake, Leave, Return, Sleep).
See the Owners’ Guide for additional information.
Preprogrammed Settings
Table 3 shows the default program settings. See Owners’
Guide for complete instructions on changing the
program.
Table 3. Default Program Settings.
70
(21
62
(16.5
70
(21
62
(16.5
Setpoints
°
F
°
C)
°
F
°
C)
°
F
°
C)
°
F
°
C)
°
78
(25.5
°
85
(29.5
°
78
(25.5
°
82
(28
Fan
SettingHeat Cool
Auto
F
°
C)
Auto
F
°
C)
Auto
F
°
C)
Auto
F
°
C)
Schedule
Period Time
Wake 6:00AM
Leave 8:00AM
Return 6:00PM
Sleep 10:00PM
Entering Installer Setup
1. Thermostat must be powered either with Alkaline
AAA batteries or with 24 Vac Common wire.
2. From the home screen, press System key. (Press
Done or Cancel key to return to home screen.)
3. Five blank touch keys show on the bottom of the
screen between the Done and Cancel keys. Press
and hold the two blank keys on either side of the
center blank key for approximately five seconds
until screen changes. See Fig. 16.
T
Insi
DON
Fig. 16. Entering Installer Setup.
4. The Installer Setup Number is displayed in the
lower left. It is a four-digit code beginning with zero.
The factory setting or other choice selection is displayed in the lower right. See Fig. 17. This is a twodigit code shown in the Option column of Table 4.
INSTALLER
SETUP NUMBER
t T
Followin
CANCEL
ADVANCE TO NEXT
INSTALLER SETUP
FACTORY
SETTING
M19923
INSTALLER SETUP
This Universal Thermostat works with many different
system types. To operate correctly, the thermostat must
be set up to operate the installed heating and/or cooling
system.
Installer Setup Menus
Main Menu: Offers the most commonly used options.
It is necessary to enter this menu to set the
thermostat to the type of system it is operating. Many
applications use only the Main Menu.
Regional Menu: Offers choices often changed due to a
particular area or region. For example, temperature
display in Fahrenheit or Celsius is offered in this menu.
Advanced Settings Menu: Offers more settings to fully
customize the thermostat. Many of these settings do not
require changing from the factory settings.
69-1700 6
PRESS TO EXIT
INSTALLER SETUP
Fig. 17. Installer Setup Number and factory setting
selection locations.
CHANGE THE
FACTORY
SETTING
M19922
Changing Installer Setup Selections
1. Advance to the next Installer Setup Number by
pressing the up and down arrow keys to the right of
the four-digit Installer Setup Number. See Fig. 17.
2. Change the factory Setting Options by pressing the
up and down arrow keys right of the two-digit code
selection. See Fig. 17.
Page 7
TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS
Exiting Installer Setup
1. Press Done key to exit Installer Setup screen.
Table 4. Main Installer Setup Menu.
Factory Setting Other Choices
Installer
Select
Not used. 1 thru 0099 — — — — —
Date (Year
Upper)
Date (Year
Lower)
Date (Month) 0140 6 Digit(s) represents
Date
(Day)
Schedule
Options
System Type
Selection
Fan Operation 0180 0 Conventional
Reversing
Valve (O/B)
Operation
Setup
Number
0120 20 Set first two digits of
0130 04 Represents last two
0150 15 Digit(s) represents
0160 4 7-day programming 0 0 —nonprogrammable —
0170 1 1 Heat/1 Cool
0190 0 O/B terminal is
current calendar
year (20 for year
2005, etc)
digits of current
calendar year
(2004).
current calendar
month.
current calendar
date.
Conventional
System
applications where
equipment controls
fan operation in
heat mode.
energized for
reversing valve in
cooling
IMPORTANT
The three Installer Setup Menus (Tables 4-6)
show all available options. These options customize themselves as you make selections to
Installer Setup. So not all Installer Setup
Selections are shown or are available to
change.
21 21 —first two digits of
00 -99 Select last two digits of
1-12 Select number that
1-31 Select number that
1-6 1—1 heat/1 cool
1 Heat pump or electric heat
1 O/B terminal is energized for
current calendar year (21xx)
current calendar year.
represents current calendar
month.
represents current calendar
date.
2—single-stage heat pump
(no aux. heat)
3—heat only (no fan)
4 —heat only (with fan)
5—hot water Series 20
(3-wire or normally open
zone valves)
6—cool only
applications where
thermostat controls fan
operation in heat mode.
reversing valve in heating
CommentsOption Description Options Description
2000 -2178
available
2001-2178
available
—
—
Available options
and defaults vary
by thermostat.
System selection
automatically
modifies some
default settings
and/or hides other
Installer Setup
options.
Only shown if
conventional
system is
selected. If heat
pump is chosen,
fan defaults to
electric.
Only shown if
heat pump
system is chosen.
7 69-1700
Page 8
TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS
Table 4. Main Installer Setup Menu. (Continued)
Factory Setting Other Choices
Installer
Select
Cycles per
hour (cph) for
1st Stage
Compressor
Cycles per
hour (cph) for
1st Stage
Conventional
Heat
Continuous
Backlight
Additional
Menu Choices
Setup
Number
0220 3 Compressor Stage
0240 5 Conventional Heat
0280 0 Backlight not on
0290 0 Only main menu
1 cycles per hour
(cph)
Stage 1 cycles per
hour (cph)
continuously.
Thermostat
backlight comes on
with each key
press.
options are shown.
Installer Test
Options shown next
(Table 7).
1-6 1-6 available;
1-12 1-12 available; typical
1 Backlight is on continuously
1,2 1—Main Menu and Regional
3 is recommended.
s e tt i n g s :
1—1 cph used for steam or
gravity system.
3—3 cph used for hot water
systems or high efficiency
(90% or better) fossil fuel
f o r c e d a i r s y s t e m s .
5—5 cph used for standard
fossil fuel forced air
systems.
9—9 cph used for electric
forced air heat systems.
(thermostat must have a
common wire attached for
this function).
Settings are shown plus
Installer Test (Tables 5 and 7
only).
2—All remaining Menu/
Options shown plus Installer
Test (Tables 5, 6 and 7).
CommentsOption Description Options Description
—
Not shown if
system selection
is heat pump.
Selection in this
stage changes
default cph for
2nd stage heat.
Option is always
shown; however,
continuously on
backlight works
only if thermostat
is wired with 24
vac Common.
The majority of
application
require only the
Main Menu
Options.
69-1700 8
Page 9
TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS
Table 5. Regional Settings Menu.
Installer
Select
Setup
Number
Changeover 0300 0 Manual changeover 1 1—auto
Deadband 0310 3 Heating and cooling
Temperature
Indication
Scale
Daylight
Savings
Remote
Temperature
Sensor
(Outdoor or
Indoor)
0320 0 Temperature is
0330 1 Daylight savings
0340 0 No remote
Factory Setting Other Choices
changeover
setpoints can be set
no closer than 3
°
(1.5
C)
displayed in
enabled (United
States).
°
F
°
F.
temperature sensor
2 thru 9 Heating and
1 Temperature is
0 0—daylight sav ings
1,3 1—outdoor
cooling setpoints
can be set no
closer than
chosen value:
°
F (1°C )
2—2
°
3—3
F (2°C )
°
4—4
F (2.5°C )
°
5—5
F (3°C )
°
6—6
F (3.5°C )
°
7—7
F (4°C )
°
8—8
F (4.5°C )
°
9—9
F (5°C)
displayed in °C.
is disabled.
temperature sensor
for display only.
3—indoor
temperature sensor
CommentsOption Description Options Description
—
Shown only if
automatic
changeover is
selected.
—
Set to 0 in areas that
do not follow
daylight savings.
Defaults and
Options depend on
System Type
selected. Indoor
Temperature Sensor
uses an averaging
network and does
not include on-board
sensor.
9 69-1700
Page 10
TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS
Table 6. Advanced Settings Menu.
Select
Furnace Filter
Change
Reminder
Humidifier Pad
Replacement
Reminder
Installer
Setup
Number
0500 0 Furnace filter
0510 0 Humidifier pad
Factory Setting Other Choices
change reminder
off
replacement
reminder off
1-6 1—1 0 r u n t i m e d a y s
1-3 1—90 calendar days
2—3 0 r u n t i m e d a y s
3—6 0 r u n t i m e d a y s
4—9 0 r u n t i m e d a y s
5—1 2 0 r u n t i m e d a y s
6—3 6 5 r u n t i m e d a y s
2—180 calendar days
3—365 calendar days
CommentsOption Description Options Description
Run time based on
call for fan.
—
UV Lamp
Replacement
Reminder
Adaptive
Intelligent
Recovery™
Number of
Periods
Minimum
Compressor
Off Time
Heat
Temperature
Range Stop
Cool
Temperature
Range Stop
Clock Format 0640 12 12-hour clock
Extended Fan
on time Heat
Extended Fan
on time Cool
0520 0 UV Lamp
0530 1 Adaptive
0540 4 Four periods
0580 5 Five minute
0600 90 Highest heating
0610 50 Lowest cooling
replacement
reminder off
Intelligent
Recovery™
control is
activated (system
starts early so
setpoint is
reached by start
of program
period).
available (Wake,
Leave, Return,
Sleep)
minimum off time
for compressor
setpoint.
setpoint.
format
0650 0 No extended fan
0660 0 No extended fan
operation after
call for heat ends
operation after
call for cool ends
1 1—365 calendar days —
0 0—conventional
2 Two periods availbable
0, 2, 3, 4 Minimum number of
40 to 89 Temperature range (1°F
51 to 99 Temperature range (1°F
recovery (system starts
recovery at
programmed time)
(Wake and Sleep)
minutes compressor is
off between calls for
compressor
increments) of heating
setpoint.
increments) of cooling
setpoint.
24 24-hour clock format —
90 Fan operation is
90 Fan operation is
extended 90 seconds
after call for heat ends.
extended 90 seconds
after call for cool ends.
—
Not shown in nonprogrammable is
selected. 2 or 4
applies to all days of
the week.
—
Shown in 1/2 °C.
Shown in 1/2 °C.
Not shown if fan
operation is set to
fossil fuel or in Cool
Only Systems
Not shown in Heat
Only Systems.
69-1700 10
Page 11
Select
Keypad
Lockout
Temperature
Control in Heat
Temperature
Control in Cool
Temperature
Display Offset
Reset
Thermostat
TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS
Table 6. Advanced Settings Menu. (Continued)
Installer
Setup
Number
0670 0 Unlocked keypad 1, 2 1—partially locked
0680 2 Standard
0690 2 Standard
0700 0 No difference in
0710 0 No thermostat
Factory Setting Other Choices
k ey pa d
2—fully locked keypad
temperature
control in heating
temperature
control in cooling
displayed
temperature and
actual room
temperature
reset.
1, 3 1—less aggressive
1, 3 1—less aggressive
-3, -2, -1,
0, 1, 2, 3
1 Resets all Installer
temperature control
(could cause
temperature
u n d e r s h o o t )
3—more aggressive
temperature control
(could cause
temperature overshoot)
temperature control
(could cause
temperature
u n d e r s h o o t )
3—more aggressive
temperature control
(could cause
temperature overshoot)
°
F (-1.5°C )
-3
- 2 ° F ( - 1 ° C )
- 1 ° F ( - . 5 ° C )
0 F ( 0 . ° C )
1 ° F ( . 5 ° C )
2 ° F ( 1° C )
3°F (1.5°C)
Setup Options to default
values and resets
schedule to default
setting.
CommentsOption Description Options Description
Unlocked—all
functions are
available.
Partially locked—
only temperature up
and down keys and
ability to enter and
modify Installer
Setup mode are
a v ai l a b l e.
Fully locked—only
ability to enter and
modify Installer
Setup mode are
available.
Applies to recovery
ramp and use of
auxiliary heat during
recovery.
Choose 1 if getting
temperature
overshoot.
Choose 3 if getting
temperature
undershoot.
Applies to recovery
ramp.
Choose 1 if getting
temperature
overshoot.
Choose 3 if getting
temperature
undershoot.
—
Only calendar
settings and time are
retained.
SYSTEM CHECKOUT
Installer System Test
The Installer System Test mode is used to test the HVAC
system(s). See Table 7. While in System Test mode,
minimum off -time for compressors is bypassed.
The Installer Test is part of Installer Setup options. Enter
Installer Setup screen and press Down arrow key to bring
up test selection(s) quickly. See Fig. 16.
ADVANCED FEATURES
Outdoor or Indoor Temperature Sensor
Allow outdoor or indoor temperature sensor to absorb the
air for a minimum of five minutes before taking a reading.
See the Sensor instructions for more information.
11 69-1700
Page 12
TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS
CAUTION
Equipment Damage Hazard.
Minimum compressor off-time is bypassed
during Installer System Test.
Avoid cycling compressor quickly.
Table 7. System Test(s).
Select
Installer Test
Cool
Installer Test
Fan
Installer Test
Heat
Installer
Setup
Number
Test 1 0 Cool is off 1 0—cool off
Test 2 0 Fan is off 1 0— f a n o f f
Test 3 0 Heat is off 1 0—heat off
Factory Setting Other Choices
TROUBLESHOOTING (SEE TABLE 8)
Table 8. Troubleshooting.
Symptom Possible Cause Action
Display does not come on. Thermostat is not being
Temperature settings do not
change.
Heating or cooling does not
come on.
Thermostat is calling for Heat
(Heat on) or Cool (Cool on) but
no heating or cooling is running.
Thermostat does not respond
when touchpad is pressed.
powered.
The upper or lower
temperature limits were
reached.
The keypad is fully locked. Check Installer Setup Number 0670 to change keypad
Thermostat minimum offtime is activated.
System selection is not set to
Heat or Cool.
O/B terminal is not set
correctly (Heat Pumps only).
System type Selection is
incorrect.
Heating or cooling
equipment is not operating.
The keypad is locked. Check Installer Setup Number 0670 to change keypad
CommentsOptions Description Options Description
1—cool stage 1
turns on
1—fan turns on
1—stage 1heat on
Check for 24 Vac between C and Rc.
Verify AAA batteries installed correctly and good.
Check temperature setpoints.
Check Installer Setup Numbers 0600 and 0610;
modify.
lock options.
Wait up to five minutes for the system to respond.
Set system Selection to correct position.
Check Installer Setup Number 0190 and set correctly.
Check Installer Setup Number 0170 and make sure
correct System type is chosen.
Check wiring.
Check Installer Setup Number 0170; verify correct
system type is chosen.
Verify equipment operation in System Test mode.
locked options.
System selection determines tests available and
number of stages shown.
Automation and Control Solutions
Honeywell International Inc. Honeywell Limited-Honeywell Limitée
1985 Douglas Drive North 35 Dynamic Drive
Golden Valley, MN 55422 Scarborough, Ontario
69-1700 G.H. 03-04 www.honeywell.com/yourhome
M1V 4Z9
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