63-2636-03
TB7220 Ultrastat
Programmable Thermostat
FEATURES
• Large, clear display with backlight shows the current
and set temperature and time—even in the dark.
• Menu-driven programming make setup effortless.
• Beautiful ergonomic design is smart and sophisticated
to match your customers’ lifestyle.
• Real-time clock keeps time during power failures and
automatically updates to daylight savings.
• “Saving Changes” notification lets you know when the
schedule changes have been saved.
• Change reminders let you know when to replace the
batteries.
• Holiday Override options allow you to override the
APPLICATION
The TB7220 Ultrastat Programmable Thermostat is an
effortless, seven-day programmable thermostat that provides
universal system compatibility, precise comfort control and is
easy-to-program.
program schedule, as desired.
• Speedy same-schedule programming—no need to
copy multiple days.
• Armchair programming allows you to remove the
thermostat from the wall for programming.
PRODUCT DATA
The TB7220 provides temperature control for gas, oil, electric
and heat pumps for up to 2 heat, 2 cool systems.
Contents
Application ........................................................................ 1
Specifications ................................................................... 2
Ordering Information ........................................................ 2
Installation ........................................................................ 4
Wiring ............................................................................... 5
Installer Setup .................................................................. 12
Operation .......................................................................... 17
Troubleshooting (Table 10) ............................................... 22
TB7220 ULTRASTAT PROGRAMMABLE THERMOSTAT
SPECIFICATIONS
Thermostat Description: See Table 1.
Electrical Ratings: See Table 2.
Temperature:
Ratings:
Operating Ambient:
TB7220: 0°F to 120°F (-18°C to 49°C).
C7089U, C7189U: 5% to 95%.
Shipping: -30 °F to 150 °F (-34.4°C to 65.6°C).
Display Accuracy: ±1°F (±0.5°C).
Setpoint:
Range:
Heating: 40°F to 90°F (4°C to 32°C).
Cooling: 50°F to 99°F (10°C to 37°C).
Default Settings: See Table 3.
Humidity Ratings (RH, non-condensing):
TB7220 Thermostat: 5% to 90%.
C7089U, C7189U: 5% to 95%.
Table 1. Thermostat Description.
Feature Description
Powering
methods
System types
(up to
2 heat/2 cool)
Changeover Manual or Auto changeover selectable
System setting Heat-Off-Cool-Auto
Fan setting Auto-On
Terminal
W (Heating) 20 - 30 Vac 0.02 - 1.0A
Y (Cooling) 20 - 30 Vac 0.02 - 1.0A
G (Fan) 20 - 30 Vac 0.02 - 0.60A
• Battery only
• 24 Vac only
• 24 Vac with battery backup
• Gas or electric heat with air conditioning
• Warm air, hot water, high-efficiency
furnaces, and heat pumps
• Heat only
• Heat only with fan
• Cool only
Table 2. Electrical Ratings
Voltage
(50/60 Hz) Running Current
Table 3. Energy-saving Default Program Settings.
Schedule
Period Time
Occ1 8:00am 70°F (21°C) 75°F (24°C)
Unocc1 10:00pm 55°F (10°C) 85°F (29.5°C)
Occ2 — — —
Unocc2 — — —
Cycle Rates (at 50% Load):
Heating: Selectable 1 - 12 cycles per hour.
Cooling: Selectable 1 - 6 cycles per hour.
Interstage Differential:
Droopless control. Once the first stage is running at 90% load,
the thermostat energizes the second stage.
Cool Indication: Displays “Cool On” when Cool is activated.
Heat Indication: Displays “Heat On” when Heat is activated.
Auxiliary Heat Indication: Displays “Aux. Heat On” when
Auxiliary Heat is activated.
Clock Accuracy: ±1 minute per month.
Finish:
TB7000: Premier White® color.
C7189U Wall Mount Remote Indoor Sensor: Premier White®
color.
T7770A Wall Mount Remote Indoor Sensor: Premier White®
color.
Batteries:
Two replaceable AA alkaline batteries: Power thermostat when
24 Vac common is not used.
Non-replaceable lithium battery with ten-year life: Under nor-
mal conditions holds calendar and time settings.
NOTE: Alkaline batteries keep calendar and time if lithium
battery is no longer functional.
Resistance Characteristics of Remote Sensors:
C7089U Outdoor Sensor: 10K ohm NTC.
C7189U Remote Indoor Sensor: 10K ohm NTC.
C7772 Flush-Mount Remote Indoor Sensor: 20K ohm NTC.
T7770A1006 Wall-Mount Remote Indoor Sensor: 20K ohm
NTC.
T7770A3002 Wall-Mount Remote Indoor Sensor: 10K ohm
NTC.
Setpoints
Heat Cool
ORDERING INFORMATION
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number.
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 Automation and Control Products Sales Office (check white pages of your phone directory).
2. Honeywell Customer Care
1985 Douglas Drive North
Minneapolis, Minnesota 55422-4386
In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Toronto, Ontario M1V 4Z9.
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.
63-2636—03 2
Calibration (TB7220, C7089U, C7189U, T7770A):
M24100
3-3/4
(95)
THERMOSTAT
AND WALLPLATE
1-3/8
(35)
6 (152)
LARGE COVER PLATE
BRACKET
LEVEL
LEVEL
MEDIUM COVER PLATE
UP
6-7/8 IN. (175 MM)
UP
8-5/16 IN. (211 MM)
6 IN.
(152 MM)
M13669
BRACKET FOR MOUNTING ON JUNCTION BOX NOT INCLUDED
WITH COVER PLATE
.
1
USE BOTTOM MOUNTING HOLES.
2
2
2
5 IN.
(127 MM)
1
2
2
No field calibration required.
Mounting Means:
TB7220: Direct wall-mount using mounting screws and
anchors provided. Fits standard vertical or horizontal
2 in. x 4 in. junction box.
C7089U: Mounts outside of living space with mounting clip and
screws provided.
C7189U, T7770A: Mounts directly on the wall using mounting
screws and anchors provided. Fits a vertical 2 x 4 in. junction box.
Cover Plate:
32003796-001 Cover Plate is used to cover marks left on the
wall by the old thermostat.
Dimensions:
TB7220 Thermostat: See Fig. 1.
C7089U Outdoor Sensor Mounting Clip: See Fig. 3.
C7189U Remote Indoor Sensor: see Fig. 5.
T7770A: See Fig. 4.
32003796-001 Cover Plate: See Fig. 2.
TB7220 ULTRASTAT PROGRAMMABLE THERMOSTAT
Fig. 1. TB7220 Thermostat
dimensions in in. (mm).
Fig. 2. 32003796-001 Cover Plate dimensions in in. (mm).
1-1/2 (38)
M4488
Fig. 3. C7089U Outdoor Sensor Mounting Clip
dimensions in in. (mm).
3 63-2636—03
TB7220 ULTRASTAT PROGRAMMABLE THERMOSTAT
MERCURY NOTICE
CAUTION
M24102
4-5/8
(117)
2-3/4 (70)
1-1/8
(29)
FRONT VIEW SIDE VIEW
KNOCKOUTS FOR
EUROPEAN APPLICATIONS
2-3/8
(60)
STANDARD
UTILITY
CONDUIT
BOX (2 X 4)
MOUNTING
HOLES
2-3/8 (60)
3-3/16 (80)
15/16
(23)
Fig. 4. T7770A dimensions in in. (mm).
5-1/16
(128)
M24101
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
Select Thermostat Location
Select a location for the thermostat about 5 ft (1.5m) above the
floor in an area with good air circulation at average
temperature. See Fig. 6.
NO
M22258
NO
NO
YES
5 FEET
[1.5 METERS]
INSTALLATION
When Installing this Product...
1. Read these instructions carefully. Failure to follow them
2. Check ratings given in instructions and on the product to
3. Installer must be a trained, experienced service
4. After installation is complete, check out product
63-2636—03 4
Fig. 5. C7189U Indoor Sensor dimensions in in. (mm).
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 an old control.
could damage the product or cause a
hazardous condition.
ensure the product is suitable for your application.
technician.
operation as provided in these instructions.
Fig. 6. Select thermostat location.
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.
Separate Wallplate from Thermostat
1. Separate the wallplate from the thermostat. See Fig. 7.
WALLPLATE
WIRE HOLE
THERMOSTAT
M22267
Fig. 7. Separate wallplate from thermostat.
TB7220 ULTRASTAT PROGRAMMABLE THERMOSTAT
CAUTION
WALL
MOUNTING
HOLES
M13665
MOUNTING
SCREWS (2)
WALL
ANCHORS (2)
WIRES THROUGH WALL
AND WIRE SLOT
Install Wallplate (See Fig. 8)
Mount the thermostat horizontally on the wall:
1. Pull the wires through the wire hole on the wallplate.
2. Position the wallplate on the wall with the arrow pointing
up. Level the wallplate for appearance only.
3. Use a pencil to mark the mounting holes.
4. Remove the wallplate from the wall and drill two 3/16 in.
holes in the wall (if drywall) as marked. For firmer
material such as plaster, drill two 7/32 in. holes. Tap the
wall anchors (provided) into the drilled holes until flush
with the wall.
5. Pull the wires through the wire hole on the wallplate and
position the wallplate over the wall anchors.
6. Insert the mounting screws into the wall anchors and
tighten.
NOTES:
— Refer to Table 5 for terminal designation
descriptions.
— See Fig. 12 through 21 for wiring diagrams for
specific equipment applications.
1. Select set of terminal identifications that correspond to
your system type (conventional or heat pump). See Fig. 9.
HEAT PUMP
CONVENTIONAL
1
SCREW
W2
Y2
S1
S2
W1
Y2
S1
S2
M24015
C
G
Y
O/B
RC
R
1
C
G
Y
W
RC
R
TERMINALS
FACTORY INSTALLED JUMPER.
Fig. 9. Terminal identifications for system type.
2. Loosen screw terminals used for the application.
3. Insert the wires into the terminal block and tighten each
screw terminal. See Fig. 10.
Fig. 8. Install wallplate.
WIRING
Electrical Shock Hazard.
Can cause electrical shock or equipment damage.
Disconnect power supply before connecting wiring.
IMPORTANT
— All wiring must agree with applicable codes,
ordinances and regulations.
— Use 18 gauge thermostat wire. Shielded cable is not
required.
M13666
WIRE HOLE
Fig. 10. Insert wires into terminal block.
4. Push excess wire back into the wall opening and restrict
wires to the shaded area. See Fig. 11.
5. Plug the wall opening with nonflammable insulation to
prevent drafts from affecting the thermostat.
5 63-2636—03
TB7220 ULTRASTAT PROGRAMMABLE THERMOSTAT
WALLPLATE
M22266
WALL OPENING
WIRE
SHADED AREA
Fig. 11. Restrict wires to shaded area of wire hole.
Table 4. Wiring Diagrams.
System Type
Wallplate Terminal
Identifications
Wiring Diagram
Figure
Standard Heat/Cool Conventional 12, 13
Heat Only Conventional 14
Cool only Conventional 15
Standard Multistage
Conventional 16, 17
up to 2 Heat/2 Cool
Heat Pump
Heat Pump 18, 19
(No Auxiliary Heat)
Heat Pump
Heat Pump 20, 21
(with Auxiliary Heat)
Multiple T7770A
— 26, 27, 28
Sensors
Multiple C7189U
—29
Sensors
Table 5. Terminal Designation Descriptions.
Terminal
Designation Description
Rc
(see Note 1)
R
(see Note 1)
Power for cooling—connect to secondary side
of cooling system transformer.
Power for heating—connect to secondary side
of heating system transformer.
Y Compressor output.
C
(see Note 2)
Common wire from secondary side of cooling
system transformer.
W Heat relay.
GFan relay.
W2 Second stage heat relay.
Y2 Second stage cooling.
O/B
Changeover valve for heat pumps.
(see Note 3)
S1
Optional outdoor or indoor remote sensor.
(See Note 5)
S2
Optional outdoor or indoor remote sensor.
(See Note 5)
NOTES:
1. When used in a single-transformer system, leave
metal jumper wire in place between Rc and R. If
used on a two-transformer system, remove metal
jumper wire between Rc and R.
2. Common wire is optional when thermostat is used
with batteries. When using separate transformers
for heating and cooling, the common must come
from the cooling transformer.
3. If thermostat is configured for a heat pump in the
Installer Setup, configure changeover valve for
cool (O-factory setting) or heat (B).
63-2636—03 6
Conventional System Wiring
COMPRESSOR CONTACTOR
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
HEAT RELAY
FAN RELAY
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
FACTORY INSTALLED JUMPER.
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL.
1
2
3
C
G
Y
W
RC
R
W2
Y2
S1
S2
2
3
L1
(HOT)
L2
1
24 VAC
M24016
COMPRESSOR CONTACTOR
M24017
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
HEAT RELAY
FAN RELAY
COOLING
TRANSFORMER
HEATING
TRANSFORMER
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
REMOVE FACTORY INSTALLED JUMPER.
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL. WHEN USED, THE COMMON MUST CONNECT
TO THE COOLING TRANSFORMER SECONDARY.
1
3
2
3
L1
(HOT)
L2
1
24 VAC
L1
(HOT)
L2
1
24 VAC
C
G
Y
W
RC
R
W2
Y2
S1
S2
2
M24018
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
HEAT RELAY
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
FACTORY INSTALLED JUMPER.
WHEN USING BATTERIES, THE 24V COMMON CONNECTION IS
OPTIONAL.
1
3
2
3
L1
(HOT)
L2
1
24 VAC
C
G
Y
W
RC
R
W2
Y2
S1
S2
2
TB7220 ULTRASTAT PROGRAMMABLE THERMOSTAT
Fig. 12. Typical wiring of single transformer 1H/1C system.
Fig. 13. Typical hookup of dual transformer 1H/1C system.
Fig. 14. Typical hookup of heat-only system.
1
L1
(HOT)
24 VAC
L2
COMPRESSOR CONTACTOR
FAN RELAY
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
1
PROTECTION AS REQUIRED.
2
FACTORY INSTALLED JUMPER.
3
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL.
3
C
G
W2
Y2
Y
W
RC
2
R
S1
S2
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
Fig. 15. Typical hookup of cool-only system.
M24019
7 63-2636—03
TB7220 ULTRASTAT PROGRAMMABLE THERMOSTAT
M24020
HEAT RELAY 2
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
FAN RELAY
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
FACTORY INSTALLED JUMPER.
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL.
1
3
2
3
COOL RELAY 1
HEAT RELAY 1
COOL RELAY 2
L1
(HOT)
L2
1
24 VAC
C
G
Y
W
RC
R
W2
Y2
S1
S2
2
M24022
HEAT RELAY 2
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
FAN RELAY
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
REMOVE FACTORY INSTALLED JUMPER.
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL. WHEN USED, THE COMMON MUST CONNECT
TO THE COOLING TRANSFORMER SECONDARY.
1
3
2
3
COOL RELAY 1
HEAT RELAY 1
COOL RELAY 2
L1
(HOT)
L2
1
24 VAC
L1
(HOT)
L2
1
24 VAC
C
G
Y
W
RC
R
W2
Y2
S1
S2
2
COOLING
TRANSFORMER
HEATING
TRANSFORMER
COMPRESSOR CONTACTOR
M24021
CHANGEOVER VALVE
1
2
3
4
5
FAN RELAY
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
FACTORY INSTALLED JUMPER.
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL.
"O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B"
IN THE INSTALLER SETUP.
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR.
WIRES MUST HAVE A CABLE SEPARATE FROM THE
THERMOSTAT CABLE.
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
3
L1
(HOT)
L2
1
24 VAC
5
C
G
Y
O/B
RC
R
W1
Y2
S1
S2
4
2
COMPRESSOR 1
COMPRESSOR 2
M24023
CHANGEOVER VALVE
FAN RELAY
1
2
3
4
5
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
FACTORY INSTALLED JUMPER.
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL.
"O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B"
IN THE INSTALLER SETUP.
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR.
WIRES MUST HAVE A CABLE SEPARATE FROM THE
THERMOSTAT CABLE.
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
3
L1
(HOT)
L2
1
24 VAC
5
C
G
Y
O/B
RC
R
W1
Y2
S1
S2
4
2
Fig. 16. Typical hookup of single transformer multistage
system (up to 2H/2C).
Fig. 17. Typical hookup of dual transformer multistage
system (up to 2H/2C).
Heat Pump System Wiring
Fig. 18. Typical hookup of single-stage heat pump with no
63-2636—03 8
auxiliary heat (1H/1C).
Fig. 19. Typical hookup of multistage heat pump with no
auxiliary heat (2H/2C).
TB7220 ULTRASTAT PROGRAMMABLE THERMOSTAT
COMPRESSOR CONTACTOR
M24024
CHANGEOVER VALVE
1
2
3
4
5
FAN RELAY
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
FACTORY INSTALLED JUMPER.
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL.
"O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B"
IN THE INSTALLER SETUP.
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR.
WIRES MUST HAVE A CABLE SEPARATE FROM THE
THERMOSTAT CABLE.
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
3
L1
(HOT)
L2
1
24 VAC
5
AUXILIARY HEAT RELAY
C
G
Y
O/B
RC
R
W1
Y2
S1
S2
4
2
COMPRESSOR 1
COMPRESSOR 2
M24025
CHANGEOVER VALVE
FAN RELAY
1
2
3
4
5
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
FACTORY INSTALLED JUMPER.
WHEN USING BATTERIES, THE 24V COMMON CONNECTION
IS OPTIONAL.
"O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B"
IN THE INSTALLER SETUP.
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR.
WIRES MUST HAVE A CABLE SEPARATE FROM THE
THERMOSTAT CABLE.
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
3
L1
(HOT)
L2
1
24 VAC
5
AUXILIARY HEAT RELAY
C
G
Y
O/B
RC
R
W1
Y2
S1
S2
4
2
POWER THE THERMOSTAT
You can choose from three methods to power the thermostat:
• Batteries only (AAA alkaline).
• 24 Vac direct connection only.
• 24 Vac direct connection with battery backup (AAA alkaline).
Wiring 24 Vac Common
• Single-Transformer System—Connect the common side of
the transformer to the C screw terminal of the thermostat
wallplate. Leave the metal jumper wire in place between Rc
and R.
• Two-Transformer System—Connect the common side of
the cooling transformer to the C screw terminal of the
thermostat wallplate. Remove the metal jumper wire
between Rc and R.
Installing Batteries
1. Install two AA alkaline batteries on the back of the thermostat as marked. See Fig. 22.
Fig. 20. Typical hookup of single-stage heat pump with
auxiliary heat (2H/1C).
Fig. 21. Typical hookup of multistage heat pump
with auxiliary heat (3H/2C).
BATTERIES (2)
BACK OF THERMOSTAT
BATTERY HOLDER
M22259
Fig. 22. Installing batteries.
2. Locate and remove tab labeled Remove. See Fig. 23.
IMPORTANT
This tab must be removed in order to set the real-time
clock.
REMOVE
TAB
INSTALLATION
REMOVE DURING
INSTALLATION
REMOVE DURING
M24103
Fig. 23. Remove tab labeled REMOVE from thermostat
back.
9 63-2636—03
TB7220 ULTRASTAT PROGRAMMABLE THERMOSTAT
CAUTION
M7514
1
2
2
1
USE APPROPRIATE MOUNTING MEANS FOR THE
TYPE OF STRUCTURE.
PLUG WIRING HOLE WITH NON-HARDENING CAULK
OR PUTTY.
C7089
WIRING HOLE
THROUGH
STRUCTURE
M13664
Locate and Mount C7089U Outdoor Temperature Sensor (Optional)
Mount the sensor where (see Fig. 24):
• cannot tamper with settings.
• there is good air circulation.
• it can measure true outdoor ambient temperature.
• surface is flat.
• wire distance between C7089U and thermostat is less than
200 feet.
Do not mount the sensor:
• in direct sunlight.
• where hot or cold air blows on the sensor. Discharge line
from an outdoor compressor unit, vent or fan causes
inaccurate temperature readings.
• where snow, ice or debris can cover it.
Use the following steps to mount the sensor:
1. Remove the sensor from the mounting clip.
2. Mark the area on the location selected for mounting the
sensor mounting clip.
3. Mount the clip.
Wire C7089U Outdoor Sensor
Electrical Interference (Noise) Hazard.
Can cause erratic system operation.
Keep wiring at least one foot away from large inductive
loads such as motors, line starters, lighting ballasts and
large power distribution panels.
Use shielded cable to reduce interference when
rerouting is not possible.
1. Wire C7089U Outdoor Sensor to S1 and S2 terminals on
the thermostat. If leadwire provided is not long enough
(60 in.), run a cable to a hole at C7089U location.
a. Using color-coded, 18-gauge thermostat wire is
recommended. For example of general wiring of
C7089U, see Fig. 25.
2. Mount C7089U in its mounting clip.
3. Plug wiring hole using nonhardening caulk or putty.
Fig. 24. Typical locations for C7089U Outdoor Sensor.
63-2636—03 10
Fig. 25. Wire C7089U Outdoor Sensor to the thermostat.
Locate and Mount T7770A or C7189U Remote Indoor Temperature Sensor (Optional)
Locate and mount the sensor in the same fashion as the
thermostat. See the Select Thermostat Location section.
Consider the following as well:
1. Be sure wire distance between sensor and thermostat is
less than 200 feet.
2. Mark the area on the wall selected for mounting the
sensor or junction box.
3. Sensor wire must be separate from the thermostat cable.
4. Run wire cable to a hole at the selected wall location.
5. Pull approximately three inches of wire through the
opening.
NOTE: Color-coded, 18-gauge wire is recommended.
Wire Indoor Sensor
CAUTION
M22933
S1 S2
SUBBASE
T7770A3002
T4 T3
T7770A3002
T4 T3
1
11
THE T7770A3002 IS A 10K OHM SENSOR.
M22934
T4 T3
T7770A3002
1
1
THE T7770A3002 IS A 10K OHM SENSOR.
S1 S2
TT
SUBBASE
T7770A1006
TT
T7770A1006
M13667
WIRES MUST HAVE A CABLE SEPARATE FROM
THE THERMOSTAT CABLE.
1
1
C7189
C7189
C7189 C7189
W2
Y2
A
S1
S2
Electrical Interference (Noise) Hazard.
Can cause erratic system operation.
Keep wiring at least one foot away from large inductive
loads such as motors, line starters, lighting ballasts and
large power distribution panels.
1. Check Installer Setup Number (ISU) 340 to ensure it is
set to the desired value. (See Table 6.)
2. Wire sensor to S1 and S2 thermostat terminals.
3. Push excess wire back into the hole. Plug the hole using
nonhardening caulk, putty or insulation to prevent drafts
from affecting performance.
4. Remove sensor cover.
5. Mount sensor to the wall or junction box using the
screws and anchors provided.
6. Level the sensor for appearance only. Device functions
correctly even when not level.
7. Install sensor cover.
Sensor Wiring for Temperature Averaging
TB7220 ULTRASTAT PROGRAMMABLE THERMOSTAT
Fig. 28. Wiring two T7770A1006 (20K ohm) Sensors and
one T7770A3002 (10K ohm) sensor to provide a
temperature averaging network
Fig. 26. Wiring four T7770A1006 (20K ohm) Sensors.
Fig. 27. Wiring two T7770A3002 (10K ohm) Sensors to
SUBBASE
S1 S2
T7770A
TT
T7770A
TT
T7770A
TT
T7770A
TT
M22831
provide a temperature averaging network.
Fig. 29. Wiring four C7189U (10K ohm) Sensors to provide
a temperature averaging network.
SET CALENDAR AND TIME
This thermostat is designed to, under normal use,
automatically keep current time and day in memory for up to
ten years once the calendar is set. There are two ways to set
the calendar for this thermostat:
Setting Calendar Once Functioning
See steps 1 through 4, in the Advanced Settings section, to set
year, month and day.
Setting Calendar When First Powered
When first powered, the thermostat proceeds through a
sequence of screens to set the calendar.
— When first powered, the thermostat proceeds through a
sequence of screens to set the calendar. See Fig. 30.
11 63-2636—03
TB7220 ULTRASTAT PROGRAMMABLE THERMOSTAT
M24104
MONTH
YEAR
DAY
GO BACK BUTTON
GOES BACK TO LAST SETTING
NEXT BUTTON
ADVANCE TO NEXT SETTING
DONE
BUTTON
ADVANCES
TO TIME
SETTING
SCREEN
UP AND DOWN
BUTTONS
CHANGES
MONTH,
DAY AND
YEAR
DeSelect Day
System & Fan
FanUseEdit
Schedule
View
Clock & More
Tue
DONE BUTTON
ADVANCES TO HOME SCREEN
UP AND DOWN BUTTONS
CHANGES TIME
M24105
View
Clock & More
AM
System & Fan
Schedule Clock & More
Fan Auto
Tue
System Auto
M24106
System & Fan
FanUseEdit
Fan Auto
System Auto
M24107
Fig. 30. Setting calendar when thermostat is first powered.
3. The Setup Number displays to the center of the screen.
It is a four-digit code beginning with zero. The current
setting is displayed to the right.
NOTE: To cycle through the Setup Numbers, press the up or
down arrow.
Fig. 31. Setting time when thermostat is first powered.
INSTALLER SETUP
Advanced Settings
The thermostat has advanced settings to match the HVAC
system. These settings can be adjusted to match specific
needs.
There are two different groups of settings:
— A complete set designed for the installation use.
— A simple set to limit accessibility for typical users.
Installer Settings (Complete Set)
Access to the installer settings is obtained as follows:
1. From the main screen, press SYSTEM.
2. Press and hold the two keys on either side of the center
key for approximately five seconds. (See Fig. 32.)
63-2636—03 12
Fig. 32. Entering Installer Setup.
User Settings (Simple Set)
Access to the user settings is obtained as follows:
1. From the main screen, press SYSTEM.
2. Press and hold the center key approximately five sec-
onds.
3. The Setup Number displays to the center of the screen.
It is a four-digit code beginning with zero. The current
setting is displayed to the right.
NOTE: To cycle through the Setup Numbers, press the up or
down arrow.
Fig. 33. Entering User Setup.
TB7220 ULTRASTAT PROGRAMMABLE THERMOSTAT
CAUTION
INSTALLER SETUP NUMBERS (ISU), SETTINGS, AND TESTS (TABLE 6)
Use the Installer System Test to test the heating, cooling and
fan. Refer to the latter portion of Table 6.
Equipment Damage Hazard.
Minimum compressor off time is bypassed during
Installer System Test
Avoid cycling compressor quickly.
Table 6. Installer Setup Menu.
Installer
Setup
Number
a
0120
a
0130
a
0140
a
0150
a
0160
0170 System Selection 8 1—1H/1C Conv
0180 Heat Fan Operation 0 0—Fossil
0185 Pre-occupancy
0190 Reversing Valve O/B 0 0—O (O/B On Cool)
0220 Cycles Per Hour
0230 CPH for second
0240 CPH for first stage
0250 CPH for second
0260 CPH for third Stage
a
Setting available for modification in both the Installer and User setup modes.
Installer Setup
Name
Date (Year Upper) 20 20—20xx
Date (Year Lower) 04 00-99 Available year range: 2001 - 2178
Date (Month) 6 1-12
Date (Day) 15 1-31 (Month Dependent)
Schedule Options 4 0—Non-Programmable
Purge Duration
(CPH) for first stage
compressor
stage compressor
conventional heat
stage conventional
heat
Heat
Default
Setting All Settings Notes
21—21xx
4—Programmable
2—1H/1C HP
3—1H w/o fan
4—1H with fan
6—1C
7—2H/1C HP
8—2H/2C Conv
9—2H/1C Conv
10—1H/2C Conv
11— 2 H / 2 C H P
12—3H/2C HP
1—Electric
0 0—no duration
1—one hour
2—two hours
3—three hours
1—B (O/B On Heat)
3 1-6 Only shown for system with cool stages. Selection in this
3 1-6 Only shown if two stages of cool selected.
5 1-12 Only shown if system is conventional with heat stages.
5 1-12 Only shown with at least two stages conventional heat or
9 1-12 Only shown if 3H/2C heat pump is selected.
IMPORTANT
NOTE: Unless otherwise noted, setup items are accessible
Available year range: 2001 - 2178
Only shown for conventional system with heat stages and
fan capability selected. If heat pump is selected, fan
defaults to electric.
Shown only if system has fan and schedule programmable.
Pre-occupancy purge enabled by nonzero duration.
Only shown with heat pump system selected.
stage changes default CPH of second stage cool.
Selection in this stage changes default CPH of second
stage heat.
2H/1C heat pump selected.
Use Installer System Test to test heating, cooling and
fan. The setting chosen for System Type (ISU 0170)
can prevent some System Test Numbers from
appearing.
through only the Installer setup and not the User
setup.
13 63-2636—03
TB7220 ULTRASTAT PROGRAMMABLE THERMOSTAT
Table 6. Installer Setup Menu. (Continued)
Installer
Setup
Number
0270 CPH for Auxiliary
0280 Continuous
0300 Changeover 1 0—Manual
Installer Setup
Name
Heat
Backlight
Default
Setting All Settings Notes
9 1-12 Only shown if multi-stage heat pump is selected (heat
pump with more heat than cool stages).
0 0—No
1—Yes
Always shown. If AC power not present the option is
overridden and normal backlight operation occurs.
Only shown if system has both heat and cool stages.
1—Auto
0310 Deadband 3°F
(2°C)
2 (1.5)—2°F (1.5°C)
3 (2.0)—3°F (2.0°C)
Only shown if Automatic Changeover Selected
4 (2.5)—4°F (2.5°C)
5 (3.0)—5°F (3.0°C)
6 (3.5)—6°F (3.5°C)
7 (4.0)—7°F (4.0°C)
8 (4.5)—8°F (4.5°C)
9 (5.0)—9°F (5.0°C)
a
0320
0330
Temperature
Indication Scale
a
Daylight Saving 2 0—Disabled
0 0—°F
1—°C
1—Enabled (US 1987)
2—Enabled (US 2007)
3—Enabled (Europe)
0340 Remote
Temperature Sensor
0 0—None
1—Outdoor for Display
2—Outdoor for Control
3—Remote 10K Indoor
Averaging would not include on-board sensor. It is
accomplished by series/parallel combinations.
2 applies only to Heat Pump applications (allowing
compressor lockout while displaying temperature).
4—Remote 20K Indoor
0350 Heat Pump
Compressor Lockout
0 0—None
15(-9.5)—15°F (-9.5°C)
20(-6.5)—20°F (-6.5°C)
25(-4.0)—25°F (-4.0°C)
30(-1.0)—30°F (-1.0°C)
Only shown for heat pump systems with more heat stages
than cool selected and remote sensor selection is outdoor
for control.
Must enforce a dead band between this and Auxiliary
Lockout
35(1.5)—35°F (1.5°C)
40(4.5)—40°F (4.5°C)
45(7.0)—45°F (7.0°C)
0360 Heat Pump Auxiliary
Lockout
0 0—None
40(4.5)—40°F (4.5°C)
45(7.0)—45°F (7.0°C)
50(10.0)—50°F (10.0°C)
55(13.0)—55°F (13.0°C)
Only shown for heat pump systems with more heat stages
than cool selected and remote sensor selection is outdoor
for control.
Must enforce a dead band between this and Heat Pump
Compressor Lockout.
60(15.5)—60°F (15.5°C)
0535 Temporary Occupied
Duration Limit
3 0—no duration
1—one hour
0 means no limit
2—two hours
3—three hours
4—four hours
a
0540
Number of Periods 4 2—2 Periods
4—4 Periods
Does not appear if Non-programmable is chosen.
Applies to all days of the week. With 2 selected the “Cancel
Period” option does not appear on the display.
0580 Minimum
Compressor Off
Time
50—Off
2—2 minutes
3—3 minutes
Only shown if system has cool stages.
4—4 minutes
5—5 minutes
0600 Heat Temperature
90 40 to 90°F (4 to 32°C) Only shown if system has heat stages.
Range Stops
0610 Cool Temperature
50 50 to 99°F (10 to 37°C) Only shown if system has cool stages.
Range Stops
a
Setting available for modification in both the Installer and User setup modes.
63-2636—03 14
TB7220 ULTRASTAT PROGRAMMABLE THERMOSTAT
Table 6. Installer Setup Menu. (Continued)
Installer
Setup
Number
a
0640
0650 Extended Fan
0660 Extended Fan
0670 Keypad Lockout 0 0—Unlocked
0680 Temperature Control
Installer Setup
Name
Default
Setting All Settings Notes
Clock Format 12 12—12 Hour
24—24 Hour
00—Off
On time Heat
90—90 seconds
00—Off
On time Cool
40—40 seconds
1—Partial Lockout 1
2—Partial Lockout 2
3—Fully Locked
2 1—Less Aggressive
Heat
2—Standard
3—More Aggressive
Not displayed with fan set to fossil or with cool-only
systems
Only shown if system has cool stages.
Unlocked: All functions accessible.
Partial 1: Locks all but Holiday, Override, and Up/Down.
Partial 2: Locks all but Holiday and Override.
Full: Entire interface locked/non-functional.
Only shown if system has heat stages.
Only integral gains affected. Affects control operation in all
control regimes (not just recovery or setpoint change).
More Aggressive stops signal prior to reaching the setpoint.
(For use with oversized equipment.)
0685 Recovery Heat
Ramp Rate
5 0-20°F/hour Only shown if system has heat stages.
0 disables ramped recovery (step setpoint change at period
start time)
0690 Temperature Control
Cool
2 1—Less Aggressive
2—Standard
3—More Aggressive
Only shown if system has cool stages.
Only integral gains affected. Affects control operation in all
control regimes (not just recovery or setpoint change).
More Aggressive stops signal prior to reaching the setpoint.
(For use with oversized equipment.)
0695 Recovery Cool
Ramp Rate
3 0-20°F/hour Only shown if system has cool stages.
0 disables ramped recovery (step setpoint change at period
start time)
0700 Temperature Display
Offset
0 -3 (-1.5)— -3°F (-1.5°C)
-2 (-1.0)— -2°F (-1.0°C)
-1 (-0.5)— -1°F (-0.5°C)
This offset applies to both the control temperature and to
the display temperature for indoor sensor (and remote
indoor sensor)
0 (0.0)—0°F (0.0°C)
1 (0.5)—1°F (0.5°C)
2 (1.0)— 2°F (1.0°C)
3 (1.5)—3°F (1.5°C)
0710 Restore Factory
Defaults
0 0—No
1—Yes
Resets all Installer Setup parameters to default values and
resets the schedule to default. Retains only calendar
settings and time.
INSTALLER SYSTEM TEST ITEMS
Test 1 Installer Test
Cool
00—Off
1—Cool Stage 1
2—Cool Stage 2
Test 2 Installer Test
Fan
Test 3 Installer Test
Heat
00—Off
1—Fan On
00—Off
1—Heat Stage 1
2—Heat Stage 1 and 2
3—Heat Stage 1,2 and 3
Test 4 Installer Test
Auxiliary Heat
a
Setting available for modification in both the Installer and User setup modes.
0 0—Auxiliary Heat Off
1—Auxiliary Heat On
NOTE: Press the Done button to exit the Installer System Test.
15 63-2636—03
TB7220 ULTRASTAT PROGRAMMABLE THERMOSTAT
M24108
UP ARROW BUTTON
RAISES TEMPERATURE SETTING OR
MAKES SELECTIONS IN OTHER SCREENS
DOWN BUTTON
LOWERS TEMPERATURE SETTING OR
MAKES SELECTIONS IN OTHER SCREENS
CLOCK &
MORE BUTTON
SELECTS TIME AND
FURNACE FILTER
INFORMATION
SYSTEM & FAN BUTTON
SELECTS FAN AUTO OR ON
SELECTS HEAT, OFF, COOL
AND EM HEAT
SCHEDULE BUTTON
SELECTS PROGRAMMING
MODE
System
Cool
Fan Auto
System & Fan Schedule Clock & More
Set To
MAIN SCREEN
PROGRAMMING
Table 7 shows default program settings.
Table 7. Energy-saving Default Program Settings.
Schedule
Period Time
Occ1 8:00am 70°F (21°C) 75°F (24°C)
Unocc1 10:00pm 55°F (10°C) 85°F (29.5°C)
Occ2 — — —
Unocc2 — — —
Fan Settings
Auto: Fan runs only when heating/cooling system is on.
See the Fan Schedule section for more information.
On: Fan runs continuously.
System Settings
Heat: Thermostat controls the heating system.
Off: Both heating and cooling systems are off.
Cool: Thermostat controls the cooling system.
Auto: Thermostat automatically changes between heat and
cool operation, depending on indoor temperature.
Setpoints
Heat Cool
Fig. 34. Main screen selections.
SHOWS CURRENT
DAY OF WEEK
Mon
CURRENT
SYSTEM SETTING
CURRENT
FAN SETTING
System Auto
System & Fan
TEMPERATURE
SETTING
CURRENT
TIME
Aux Heat On
Fan Auto
Schedule Clock & More
INDICATES
THERMOSTAT IS
"CALLING FOR
COOL OR HEAT"
Programming Heating and Cooling Schedule
The thermostat can control up to four different schedule
periods per day:
OCC 1: Work arrival time. Period to keep space at a
comfortable temperature.
UNOCC1: Work exit time. Period to keep space at an
energy-saving temperature.
OCC 2: Second occupied period.
UNOCC2: Second unoccupied period.
NOTE: Available schedule times are at 15-minute intervals.
Editing Schedule
1. Press MORE
2. Press SCHEDULE.
3. Press EDIT.
4. Press SELECT DAY to select the days you wish to
schedule.
5. Press NEXT when finished selecting days
NOTES:
— Multiple days can be selected.
— To skip over a day, press the Up or Down arrow
keys.
— Checkmarks appear next to selected days. These
are scheduled with identical times and temperatures.
M24109
Fig. 35. Main screen display.
63-2636—03 16
TB7220 ULTRASTAT PROGRAMMABLE THERMOSTAT
M24110
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Select Day
Next Step
Cancel
M24111
DAYS
SELECTED
NEXT STEP BUTTON
ADVANCES PERIOD,TIME,
HEAT AND COOL TEMPERATURES
SCHEDULE
PERIOD
HEAT OR COOL
TEMPERATURES
GO BACK BUTTON
GOES BACK TO THE
LAST SCHEDULE STEP
DONE BUTTON
EXITS AND SAVES
CHANGES MADE
TO SCHEDULE
DOWN ARROW
CHANGES TIME
AND
TEMPERATURES
UP ARROW
CHANGES TIME
AND
TEMPERATURES
AM
Period
Wake Leave
Go Back Next Step Done
Mon
Tue
Wed
Thu
Fri
Heat
OPERATION
Setting Temperature Overrides
There are three temperature override options:
— Hold Temperature Until
— Override, and
—Holiday.
HOLD TEMPERATURE UNTIL
Holds the temperature temporarily until the time set by the
user, or the next scheduled period time.
1. Press the Up or Down arrow next to the temperature to
adjust. The Hold Until time appears on the screen. The
time defaults to the next scheduled period start time
2. Press NEXT to adjust the time for the thermostat to
resume schedule.
Fig. 36. Initial schedule edit screen.
6. OCCUPIED 1 flashes, denoting the period that is about
to be edited.
7. Press NEXT, and the start time for that period flashes.
8. Change the start time by pressing the Up and Down
arrow keys.
9. Press NEXT to edit the heating and cooling setpoints.
10. Continue to cycle through the remaining periods and
make changes by pressing the NEXT key.
NOTE: The installer setup can limit the length of time
for an override to 1, 2, 3, or 4 hours beyond the
current time.
3. Press DONE or wait 5 seconds.
4. Press CANCEL or SCHEDULE to cancel “Hold Tempera-
ture Until” and resume the schedule.
OVERRIDE
Changes temperature setting until the next period takes effect.
For use during Unoccupied periods.
1. Press OVERRIDE. The settings change by default to the
next Occupied period.
NOTE: Changes are limited to those allowed by the
lockout level.
2. Press Up or Down arrow to change the override temperature, and NEXT to adjust override time.
HOLIDAY
Changes temperature setting for a designated number of days.
Press MORE and then HOLIDAY. The screen shows “Hold
Until 1 DAYS”.
1. Press Up or Down arrow to change the temperature
desired for the thermostat to override the schedule.
2. Press NEXT to change the desired days for the duration
of the holiday.
3. To cancel the Holiday Override early, press CANCEL.
11. When complete, press DONE. SAVING CHANGES
12. To exit schedule without saving changes, press CANCEL
Setting Time
1. Press CLOCK.
2. Use arrows to set current time.
3. Press DONE.
IMPORTANT
Fig. 37. Screen to edit existing settings.
appears on the screen to indicate changes are being
saved to the day(s) modified.
any time.
The current day of the week should already be set
correctly. If not, see the Advanced Settings section to
set the day.
Fan Status Displayed on Main Screen
. When the thermostat is running the fan, the fan blade symbol
appears next to FAN to indicate the thermostat has the fan
on.
NOTE: If the thermostat is not controlling the fan—typical for
many gas, forced-air heating systems—the fan blade
symbol will not appear even though the fan may
be running.
Replacing Batteries
Not all thermostat models require batteries. If the thermostat
has batteries, a low battery warning (see Fig. 38) flashes on
the main screen for approximately 30 days.
17 63-2636—03
TB7220 ULTRASTAT PROGRAMMABLE THERMOSTAT
WALL
M24113
WALLPLATE
M24114
TERMINAL SCREW BLOCK
PINS ON
BACK OF
THERMOSTAT
NOTES:
— If batteries are not replaced when the Low Battery
warning is flashing, the LO batt screen displays
continuously and the thermostat stops operating
until batteries are replaced.
— The thermostat has a low battery indicator.
However, it is recommended that the batteries be
replaced once each year. Do this to prevent
leakage and prevent the thermostat and HVAC
system from shutting down due to lack of
thermostat battery power.
M24112
Fig. 38. Low battery signal.
Replace the batteries as follows:
1. Remove the thermostat from the base by pulling it
straight out. (See Fig. 39.)
2. Install two new AA alkaline batteries with proper polarization.
NOTES:
— Always use AA alkaline batteries.
— All programming (Schedule, Date and Time)
information is retained during battery replacement.
3. Place thermostat back on subbase by aligning terminal
screw blocks with the pins on the back of the thermostat.
(See Fig. 40.)
4. Push the thermostat straight onto the base.
Fig. 40. Placing thermostat back onto subbase.
Reading Remote Indoor Temperature
If connected to an installed remote indoor temperature sensor,
the thermostat displays the indoor temperature from the
remote sensor(s).
NOTE: If connected to an installed remote indoor temperature
sensor, the thermostat internal sensor is not used.
ONE REMOTE INDOOR SENSOR INSTALLED
If one remote indoor temperature sensor is used, the screen
showing the Inside temperature reading displays the
temperature at the indoor remote sensor location.
MULTIPLE REMOTE INDOOR SENSORS INSTALLED
If more than one remote indoor sensor is used, the screen
showing the Inside temperature reading displays the average
of all the remote indoor sensors.
Reading Outdoor Temperature
If connected to an outdoor sensor, the thermostat can display
the Outside temperature.
VIEW OUTSIDE TEMPERATURE
View the outdoor temperature by pressing MORE until the
outside temperature shows where the Indoor temperature was
displayed. The word Outdoor will be displayed on the LCD.
Fig. 39. Removing thermostat from subbase.
63-2636—03 18
Screen Locked
Portions of the touch screen interface can be fully or partially
locked. See the Advanced Settings section for information to
use these features. When the thermostat displays LOCKED,
the buttons are either fully or partially locked.
Fully Locked Screen
In this mode, the entire interface is locked and not functional.
To unlock screen, see the Advanced Settings section. The
screen continuously displays SCREEN LOCKED.
TB7220 ULTRASTAT PROGRAMMABLE THERMOSTAT
Partially Locked Screen
When partially locked:
— Pressing a locked key prompts the screen to indicate
SCREEN LOCKED for five to seven seconds.
— Pressing an unlocked key with SCREEN LOCKED active
removes SCREEN LOCKED from the display.
PARTIAL LOCKOUT 1
This mode locks all keys except HOLIDAY, OVERRIDE, and
temperature Up/Down arrows:
— User can change the temperature setpoint, but cannot
change schedule settings.
— The temporary temperature change lasts until next
scheduled period. The screen displays that time.
— User can change the temperature setpoint, but cannot
change schedule settings.
— Pressing HOLIDAY sets the temperature to the Unoccupied
setting for the selected period of time. The next Occupied
period switches back to the program settings.
— Pressing OVERRIDE sets the temperature to the Occupied
setting for the selected period of time. The next Unoccupied
period switches back to the program settings.
— To cancel the temperature override and follow the
programmed schedule, press CANCEL.
— To unlock the screen, see Advanced Settings section.
PARTIAL LOCKOUT 2
This mode locks all keys except HOLIDAY and OVERRIDE:
— Pressing HOLIDAY sets the temperature to the Unoccupied
setting for the selected period of time. The next Occupied
period switches back to the program settings.
— Pressing OVERRIDE sets the temperature to the Occupied
setting for the selected period of time. The next Unoccupied
period switches back to the program settings.
— To cancel the temperature override and follow the
programmed schedule, press CANCEL.
— To unlock the screen, see Advanced Settings section.
Minimum-Off Timer Compressor Protection
The thermostat has an adjustable Minimum-Off Timer that can
be set from zero to five minutes (Factory Setting—five
minutes). The Minimum-Off Timer can be bypassed through
the Installer System Test or it can be bypassed permanently by
setting the Minimum-Off Timer to 0 minutes in the Installer
Setup. The Minimum-Off Timer is activated after the
compressor turns off:
— If the thermostat is system powered (common wire), the
Minimum-Off Timer is also activated upon initial startup and
after power interruptions.
— If there is a call for cooling or heating during the Minimum-
Off Time, the thermostat displays “Wait.”
— When the Minimum Off Timer expires, “Cool On” or “Heat
On” (heat pumps only)” appears solidly in the display and
the compressor and fan turn on.
Heat Pump Temperature Lockouts
Dual Fuel Heat Pump and Outdoor Temperature
Sensor
In this operation, there is no external fossil fuel kit (dual fuel kit)
installed; the thermostat controls this function:
1. Choose correct heat pump application in ISU 0170.
2. Choose Outdoor Temperature Sensor for Heat Pump
Temperature Lockouts Option in ISU 0340.
3. Choose appropriate Balance Point Temperature in
ISU 0350.
OPERATION IN HEAT MODE ABOVE BALANCE POINT (OUTDOOR
TEMPERATURE)
When the outdoor temperature is above the selected Balance
Point Temperature (ISU 0350), only the compressor operates
and the fan (G terminal) energizes when the thermostat calls
for heat.
Temperature Recovery
The thermostat is equipped with a feature to eliminate
guesswork when setting a schedule. That is, the user need not
know the amount of time for the HVAC system to bring the
space to temperature (without overshoot) prior to the
scheduled time. The thermostat manages that automatically.
Simply set the program schedule to the desired time to have
the space at comfort temperature. In addition, program the
temperature to this comfort temperature. The thermostat
activates the heating or cooling at the proper time to reach the
scheduled temperature at the scheduled time.
NOTE: The setpoint changes gradually to use economical
stages and avoid overshoot.
For example—the space will be occupied at 8:00 AM and the
desired temperature is 70°F. Set the OCC 1 period for 8:00 AM
and 70°F. The thermostat turns on the heat prior to 8:00 AM to
raise the temperature to 70°F by 8:00 AM.
The thermostat provides an alert that the heating or cooling
system is coming on before a scheduled time by displaying
“Recovery” on the screen.
OPERATION IN HEAT MODE BELOW BALANCE POINT (OUTDOOR
TEMPERATURE)
When the outdoor temperature is below the selected Balance
Point Temperature (ISU 0350), only the Fossil Fuel (auxiliary
heat) operates and the fan (G terminal) does not energize
when the thermostat calls for heat.
Heat Pump with Auxiliary (Backup) Heat and Outdoor
Temperature Sensor
1. Choose correct heat pump application in ISU 0170.
2. Choose Outdoor Temperature Sensor for Control
Option in ISU 0340.
3. Choose Compressor Lockout Temperature in
ISU 0350.
4. Choose Auxiliary Lockout Temperature in ISU 0360.
NOTE: There is a 5°F deadband between Compressor and
Auxiliary Heat lockout temperatures
Operation in Heat Mode
When the outdoor temperature is:
— Below Compressor Lockout Temperature: only Auxiliary
Heat operates.
— Above Auxiliary Lockout Temperature: only the Compressor
operates.
— Between the two temperatures: both the Compressor and
Auxiliary Heat operate.
19 63-2636—03
TB7220 ULTRASTAT PROGRAMMABLE THERMOSTAT
COMPRESSOR ONLY
50
BOTH COMPRESSOR AND
AUXILIARY HEAT
35
AUXILIARY ONLY
OUTDOOR TEMPERATURE
AUXILIARY
LOCKOUT
TEMPERATURE
COMPRESSOR
LOCKOUT
TEMPERATURE
M19950
Fig. 41. Heat Pump Operation with Lockout
Temperatures Set.
Operating Sequence
The thermostat energizes specific terminal(s), depending on
the demand for heating, cooling or fan. The thermostat screen
shows the time, inside temperature, system and fan selections.
Additional indicators are shown when the heating, cooling or
fan is energized. See Tables 8 and 9 for specification
information.
Table 8. Sequence of Operation for Conventional Systems.
System
Setting
Off Auto — — —
Cool Auto — — —
Cool
or Auto
Cool
or Auto
Heat Auto — — —
Heat
or Auto
Heat
or Auto
a
If Installer Setup System type is set to two stages of cooling.
b
G energizes only if Installer Setup 0180 is set to Electric.
c
If Installer Setup System type is set to two stages of heating.
Fan
Setting Call for Action
Auto Stage 1
Cooling
Auto Stages 1 and 2
Cooling
Auto Stage 1
Heating
Auto Stages 1 and 2
Heating
Energize
Terminals
Screen
Message
Y, G Cool On
Y, Y 2
W, G
W, W2
a
, G
b
c
, G
b
Cool On
Heat On
Heat On
Table 9. Sequence of Operation for Heat Pump Systems.
System
Setting
Off Auto —
Fan
Setting Call for Action
Energize
Terminals
a
O/B
Screen
Message
—
Cool
a
a
a
d
a
b
, G,
c
b
,
, G,
, G,
a
a
Cool On
—
Heat On
Auxiliary
Heat On
Cool
or Auto
Heat Auto None
Heat
or Auto
Auto Stage 1 Cooling
Stages 1 and 2
Cooling
Auto Stage 1 Heating
Stages 1 and 2
Heating
Stages 1, 2 and 3
Heating
Y, G, O/B
Y, Y 2
O/B
O/B
Y, G, O/B
Y, W 1
O/B
Y, Y 2
W1
O/B
a
Configure O/B in Installer Setup. Based on last piece of
equipment called (cooling = O; heating = B).
b
If Installer Setup System Type is set to 3Heat/2Cool Heat
Pump with Auxiliary Heat.
c
If Installer Setup System Type is set to 2Heat/1Cool Heat
Pump with Auxiliary Heat.
d
This terminal does not energize if Installer Setup System type
is set to 2 Heat/2 Cool Heat Pump with no Auxiliary Heat.
Second Stage Heat and Cool Control
While maintaining setpoint, several factors affect when 2nd
stage energizes such as load conditions, environmental
conditions, P+I control, and home insulation. The second stage
energizes when the thermostat senses 1st stage is running at
90% capacity. This operation is droopless control.
Temperature Sensor Operation and Checkout
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.
63-2636—03 20
NOTE: The C7089U, C7189U, and T7770A Temperature
Sensors are calibrated at the factory and cannot
be recalibrated in the field.
C7089U Outdoor Temperature Sensor
Operation
When installed with Thermostat ISU 0340 set to 1 or 2, the
thermostat can display outside temperature.
Checkout
Allow C7089U Outdoor Sensor to absorb outdoor air for a
minimum of twenty minutes before taking a reading.
With an accurate thermometer (±1°F [0.5°C]) measure the
temperature at the sensor location, allowing time for the
thermometer to stabilize before reading.
TB7220 ULTRASTAT PROGRAMMABLE THERMOSTAT
TEMPERATURE (DEGREES)
o
F
-40
-20 0 20 40
60
80
100
120
-20
-30
-40
-10
40
RESISTANCE (OHMS)
10K OHM AT
77
o
F (25oC)
220K
190K
160K
130K
100K
90K
60K
30K
o
C
M22823
0
10 20
30
50
0K
To verify sensor resistance, remove one wire from one of the
C7089U 60-in. leadwires. Use an ohmmeter to measure the
resistance across the sensor. Then compare sensor accuracy
with the temperature/resistance curve in Fig. 42.
C7189U Remote Indoor Temperature Sensor
Operation
When installed with Thermostat ISU 0340 set to 3, the remote
inside temperature is displayed on the Thermostat Home
Screen as Inside Temperature. The thermostat internal
temperature sensor is not used.
The C7189U can be used to provide one remote sensor input
or as a temperature averaging network with multiple C7189U
Sensors connected, as shown in Fig. 29.
Checkout
For best results, allow C7189U Wall Mount Temperature
Sensor to absorb the air moving through the room for a
minimum of twenty minutes before taking a resistance
measurement.
With an accurate thermometer (±1°F [0.5°C]) measure the
temperature at the sensor location, allowing time for the
thermometer to stabilize before reading.
T7770A Remote Temperature Sensor
Operation
When installed with Thermostat ISU 0340 set to 3 or 4, the
remote inside temperature is displayed on the Thermostat
Home Screen as Inside Temperature. The thermostat internal
temperature sensor is not used.
The T7770A can be used to provide one remote sensor input
or as a temperature averaging network with multiple T7770A
Sensors connected, as shown in Fig. 26 through 28.
Checkout
For best results, allow T7770A Wall Mount Temperature
Sensor to absorb the air moving through the room for a
minimum of twenty minutes before taking a resistance
measurement.
With an accurate thermometer (±1°F [0.5°C]) measure the
temperature at the sensor location, allowing time for the
thermometer to stabilize before reading.
To verify sensor resistance, remove one wire from one of the
wiring terminals. Use an ohmmeter to measure the resistance
across the sensor. Then verify the sensor accuracy with the
temperature/resistance in Fig. 43.
To verify sensor resistance, remove one wire from one of
C7189U wiring terminals. Use an ohmmeter to measure the
resistance across the sensor. Then compare sensor accuracy
with the temperature/resistance curve in Fig. 42.
Fig. 42. 10K ohm sensor resistance versus temperature.
80K
70K
60K
50K
40K
30K
RESISTANCE (OHMS)
20K
10K
30
0
40 50 60 70
10
20
TEMPERATURE (DEGREES)
20K OHM AT
77
80
30
o
F (25oC)
90
100
110
40
M5874A
o
F
o
C
Fig. 43. 20K ohm sensor resistance versus temperature.
21 63-2636—03
TB7220 ULTRASTAT PROGRAMMABLE THERMOSTAT
TROUBLESHOOTING (TABLE 10)
Table 10. Troubleshooting.
Symptom Possible Cause Action
Display does not come on. Thermostat is not being powered. Check for 24 Vac between C and Rc.
Check that AAA batteries are installed correctly
and are good.
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.
Heat does not turn on (Heat On is
solid in the display).
The upper or lower temperature limits were
reached.
The keypad is fully locked. Check ISU 0670 to change keypad locked
Thermostat minimum off-time is activated. Wait up to five minutes for the system to respond.
System selection is not set to Heat or Cool. Set system Selection to correct position.
System type Selection is incorrect. Check ISU 0170 and make sure correct System
Heating or cooling equipment is not
operating.
Heating equipment failure. Check for 24 Vac at the equipment on the
Check temperature setpoints.
Check ISU 0600 and 0610; modify as needed.
options.
type is chosen.
Check wiring.
Check ISU 0170 and make sure correct system
type is chosen.
Verify operation of equipment in System Test
mode.
secondary side of the transformer between power
and common. If voltage is not present, check the
heating equipment to find the cause of the
problem.
Cooling does not turn on (Cool
On is solid in the display).
Fan does not turn on in a call for
heat (electric furnace).
Heat pump puts out cool air in the
heat mode and warm air in the
cool mode.
Both the heating and cooling
equipment are running at the
same time.
Check for 24 Vac between the heat terminal (W)
and transformer common. If 24 Vac is present, the
thermostat is functional. Check the heating
equipment to find the cause of the problem.
Loose or broken wire connection between
thermostat and heating equipment.
Cooling equipment failure. Check for 24 Vac at the equipment on the
Loose or broken wire connection between
thermostat and cooling equipment.
Fan Control in Heating is set to Gas or Oil
Furnace (Setting 0180).
Changeover Valve (ISU 0190) is not
configured to match the changeover
required by the installed heat pump.
The heating equipment is not a heat pump
but the System Type (ISU 0170) is set to
Heat Pump.
Heating and cooling wires are shorted
together.
Check for 24 Vac between the heat terminal (W)
and transformer common. If voltage is not
present, check wire connection (loose or broken)
between the thermostat and the heating
equipment.
secondary side of the transformer between power
and common. If voltage is not present, check the
cooling equipment to find the cause of the
problem.
Check for 24 Vac between the cool terminal (Y)
and transformer common. If 24 Vac is present, the
thermostat is functional. Check the cooling
equipment to find the cause of the problem.
Check for 24 Vac between the cool terminal (Y)
and transformer common. If voltage is not
present, check the wire connection (loose or
broken) between the thermostat and the cooling
equipment.
Set Fan Control in Heating to Electric Furnace
(Setting 0180).
Set Changeover Valve (ISU 0190) to match the
changeover required by the installed heat pump.
Set System Type (ISU 0170) to match the
installed heating and/or cooling equipment.
Separate the shorted heating and cooling wires.
63-2636—03 22
Symptom Possible Cause Action
Heating equipment is running in
the cool mode.
Heating equipment does not turn
off and heat temperature setting
is set below room temperature
(Heat On is not in the display).
Cannot set the system setting to
Heat.
TB7220 ULTRASTAT PROGRAMMABLE THERMOSTAT
Table 10. Troubleshooting. (Continued)
Heating equipment is not a heat pump but
System Type (ISU 0170) is set to Heat
Pump.
Heating equipment is not a heat pump but
System Type (ISU 0170) is set to Heat
Pump.
System Type (ISU 0170) is set to Cool
Only.
Set System Type (ISU 0170) to match the
installed heating and/or cooling equipment.
Set System Type (ISU 0170) to match the
installed heating and/or cooling equipment.
Set System Type (ISU 0170) to match the
installed heating and/or cooling equipment.
Cannot set the system setting to
Cool.
Heat On is not in the display. System setting is not set to Heat and/or
Cool On is not in the display. System setting is not set to Cool and/or the
Wait is in the display. Compressor minimum off timer is active. Wait up to five minutes for the cooling or heating
“Screen Locked” appears on the
screen and all or some of the
keys do not respond.
System Type (ISU 0170) is set to Heat
Only or Heat Only with Fan.
temperature setting is not set above room
temperature.
temperature setting is not set below room
temperature.
The keypad is fully or partially locked. Check ISU 0670 to change keypad locked
Set System Type (ISU 0170) to match the
installed heating and/or cooling equipment.
Set the system setting to Heat and set the
temperature setting above the room temperature.
Set the system setting to Cool and set the
temperature setting below the room temperature.
(heat pump) equipment to turn on.
options.
Perchlorate Material
This thermostat contains a Lithium battery which may contain
Perchlorate material.
The following statement is required:
Perchlorate Material—special handling may apply.
See www.dtsc.ca.gov/hazardouswaste/perchlorate
23 63-2636—03
TB7220 ULTRASTAT PROGRAMMABLE THERMOSTAT
Automation and Control Solutions
Honeywell International Inc. Honeywell Limited-Honeywell Limitée
1985 Douglas Drive North 35 Dynamic Drive
Golden Valley, MN 55422 Toronto, Ontario M1V 4Z9
customer.honeywell.com
® U.S. Registered Trademark
© 2011 Honeywell International Inc.
63-2636—03 M.S. Rev. 03-11
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