Honeywell TB7220U User manual

INSTALLATION INSTRUCTIONS
62-0223—1
TB7220U
Ultrastat
Programmable Thermostat
APPLICATION
The TB7220U Programmable Thermostat provides electronic control of 24 Vac heating and cooling systems.
See Table 1 for a description.
Table 1. TB7220U Thermostat Description.
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 an old control.
INSTALLATION
When Installing this Product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a
hazardous condition.
2. Check ratings given in instructions and on the
product to ensure the product is suitable for your
application.
3. Installer must be a trained, experienced service
technician.
4. After installation is complete, check out product
operation as provided in these instructions.
CAUTION
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. 1.
Fig. 1. 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.
Feature Description
Powering Methods •Battery only
•Direct connection to a 24 Vac transformer only
•Direct connection to a 24 Vac transformer with battery backup
System Types •Conventional (up to 2 Heat, 2 Cool stages)
•Heat Pump (up to 3 Heat, 2 Cool stages)
Changeover Manual or automatic changeover (selectable)
System Setting Heat-Off-Cool-Auto
Fan Setting Auto-On
5 FEET
[1.5 METERS]
YES
NO
M22258
NO
NO

TB7220U ULTRASTAT PROGRAMMABLE THERMOSTAT
62-0223—1 2
Separate Wallplate from Thermostat
1. Separate the wallplate from the thermostat. See
Fig. 2.
Fig. 2. Separate wallplate from thermostat.
Install Wallplate (See Fig. 3)
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. Ensure all wires are pulled through the wire hole on
the wallplate.
6. Position the wallplate over the wall anchors.
7. Insert the mounting screws into the wall anchors
and tighten.
Fig. 3. Install wallplate.
WIRING
IMPORTANT
— All wiring must agree with applicable codes,
ordinances and regulations.
— Use 18 gauge thermostat wire. Shielded cable is
not required.
NOTES:
— Sensor wires must have a cable separate
from the thermostat control cable.
— Refer to Table 2 for terminal designation
descriptions.
— See Fig. 6 through 16 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. 4).
Fig. 4. 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.
4. Push excess wire back into the wall opening and
restrict wires to the shaded area. See Fig. 5.
5. Plug the wall opening with nonflammable insulation
to prevent drafts from affecting the thermostat.
Fig. 5. Restrict wires to shaded area of wire hole.
THERMOSTAT
WIRE HOLE
M22267
WALLPLATE
M22268
DRILLED
HOLES (2)
WALL
ANCHORS (2)
MOUNTING
SCREWS (2)
WALLPLATE
M23052
C
G
Y
O/B
RC
R
W1
Y2
S1
S2
C
G
Y
W
RC
R
W2
Y2
S1
S2
SCREW
TERMINALS
HEAT PUMP
CONVENTIONAL
WALLPLATE
M22266
WALL OPENING
WIRE
SHADED AREA

TB7220U ULTRASTAT PROGRAMMABLE THERMOSTAT
3 62-0223—1
Table 2. Terminal Designation Descriptions.
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).
4. Sensor wires must have a cable separate
from the thermostat control cable.
Table 3. Wiring Diagrams.
Terminal Designation Description
RC (see Note 1) Power for cooling—connect to secondary side of cooling system transformer.
R (see Note 1) 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.
WHeatrelay.
G Fan relay.
W2 Second stage heat relay.
Y2 Second stage cooling.
O/B (see Note 3) Changeover valve for heat pumps.
S1 (See Note 4) Optional outdoor or indoor remote sensor.
S2 (See Note 4) Optional outdoor or indoor remote sensor.
System Type
Wallplate
Terminal
Identifications
Wiring
Diagram
Figure
Standard Heat/Cool Conventional 6, 7
Heat Only Conventional 8
Heat Only with Fan Conventional 9
Cool only Conventional 10
Standard Multistage
up to 2 Heat/2 Cool
Conventional 11, 12
Heat Pump
(No Auxiliary Heat)
Heat Pump 13, 14
Heat Pump
(with Auxiliary Heat)
Heat Pump 15, 16
Multiple T7770A Sensors — 17, 18, 19
Multiple C7189U Sensors — 20

TB7220U ULTRASTAT PROGRAMMABLE THERMOSTAT
62-0223—1 4
Conventional System Wiring
Fig. 6. Typical wiring of single transformer
1H/1C system.
Fig. 7. Typical hookup of dual transformer
1H/1C system.
Fig. 8. Typical hookup of heat-only system.
Fig. 9. Typical hookup of heat-only system with fan.
Fig. 10. Typical hookup of cool-only system.
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
M23053
COMPRESSOR CONTACTOR
M23054
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
M23055
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
M23056
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
3
L1
(HOT)
L2
1
24 VAC
C
G
Y
W
RC
R
W2
Y2
S1
S2
2
M23057
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
COMPRESSOR CONTACTOR
L1
(HOT)
L2
1
24 VAC
C
G
Y
W
RC
R
W2
Y2
S1
S2
2

TB7220U ULTRASTAT PROGRAMMABLE THERMOSTAT
5 62-0223—1
Fig. 11. Typical hookup of single transformer
multistage system (up to 2H/2C).
Fig. 12. Typical hookup of dual transformer multistage
system (up to 2H/2C).
M23058
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
M23059
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

TB7220U ULTRASTAT PROGRAMMABLE THERMOSTAT
62-0223—1 6
Heat Pump System Wiring
Fig. 13. Typical hookup of single-stage heat pump
with no auxiliary heat (1H/1C).
Fig. 14. Typical hookup of multistage heat pump with
no auxiliary heat (2H/2C).
Fig. 15. Typical hookup of single-stage heat pump
with auxiliary heat (2H/1C).
Fig. 16. Typical hookup of multistage heat pump
with auxiliary heat (3H/2C).
COMPRESSOR CONTACTOR
M23059
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
M23061
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
COMPRESSOR CONTACTOR
M23062
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
M23063
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

TB7220U ULTRASTAT PROGRAMMABLE THERMOSTAT
7 62-0223—1
Sensor Wiring for Temperature Averaging
Fig. 17. Wiring four T7770A1006 (20K ohm) Sensors.
Fig. 18. Wiring two T7770A3002 (10K ohm) Sensors to
provide a temperature averaging network.
Fig. 19. Wiring two T7770A1006 (20K ohm) Sensors
and one T7770A3002 (10K ohm) sensor to provide a
temperature averaging network
Fig. 20. Wiring four C7189U (10K ohm) Sensors to
provide a temperature averaging network.
M22831
S1 S2
TT
SUBBASE
T7770A
TT
T7770A
TT
T7770A
TT
T7770A
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
M23027
WIRES MUST HAVE A CABLE SEPARATE
FROM THE THERMOSTAT CABLE.
1
1C7189 C7189
C7189 C7189
S1 S2
SUBBASE

TB7220U ULTRASTAT PROGRAMMABLE THERMOSTAT
62-0223—1 8
POWER THE THERMOSTAT
You can choose from three methods to power the
thermostat:
• Batteries only (AA alkaline).
• 24 Vac direct connection only.
• 24 Vac direct connection with battery backup (AA
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. 21.
Fig. 21. Installing batteries.
2. Locate and remove the tab labeled Remove. See
Fig. 22.
IMPORTANT
This tab must be removed in order to set the
real-time clock.
Fig. 22. Remove tab labeled REMOVE from thermostat
back.
Mount Thermostat to Wallplate
1. Align the terminal screw blocks with the pins on the
back of the thermostat.
2. Push the thermostat straight onto the wallplate until
it snaps into place. See Fig. 23.
Fig. 23. Mount thermostat to wallplate.
M22259
BACK OF THERMOSTAT
BATTERY HOLDER
BATTERIES (2)
REMOVE
TAB
REMOVE DURING
INSTALLATION
M22260
REMOVE DURING
INSTALLATION
WALL
M23024

TB7220U ULTRASTAT PROGRAMMABLE THERMOSTAT
9 62-0223—1
SETTING 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 and time for this thermostat:
SETTING DATE/TIME WHEN THERMOSTAT IS FIRST POWERED
When the thermostat is first powered, the display is ready
to set the calendar and time. The thermostat proceeds
through a sequence of setup screens. See Fig. 24.
SETTING DATE/TIME AFTER THERMOSTAT IS ALREADY
FUNCTIONING
Use the installer setup to set year, month and day. See
Fig. 25.
Fig. 24. Setting calendar and time when thermostat is first powered.
Fig. 25. Setting Date/Time after thermostat is already
functioning.
ADVANCED SETTINGS
The thermostat has advanced settings to match the HVAC
system. These settings can be adjusted to match specific
needs. See the following section (Installer Setup
Numbers, Settings, and Tests) for details.
M23023
MONTH
YEAR DAY
GO BACK KEY
GOES BACK TO
LAST SETTING
NEXT KEY
ADVANCE TO NEXT SETTING
DONE KEY
ADVANCES TO TIME SETTING
SCREEN AND HOME SCREEN
UP AND DOWN KEYS
CHANGES MONTH, DAY,
YEAR AND TIME
DeSelect Day
System & Fan
FanUseEdit
Schedule
View
Clock & More
Tue
Done
PM
M23049
0120 Date (Year
Upper)
Select first two digits of current
calendar year (20 for year 2005, etc).
Date (Year
Lower)
Select last two digits of current
calendar year (05 for year 2005, etc).
Date
(Month)
Select number that represents current
calendar month.
Date
(Day)
Select number that represents current
calendar date.
0130
0140
0150
CHANGE
THE
FACTORY
SETTING
FACTORY
SETTING
ADVANCE TO
NEXT SETUP
NUMBER
PRESS TO
EXIT SETUP
GOES BACK
TO LAST
SETUP
NUMBER
View
Clock & More
Next
Go Back
SETUP
NUMBER AM
Setup
Number
Setup
Name
(Select Your Setting)
Settings
Done

TB7220U ULTRASTAT PROGRAMMABLE THERMOSTAT
62-0223—1 10
INSTALLER SETUP NUMBERS, SETTINGS, AND TESTS (TABLE 4)
Configure Installer Setup
1. Press and release the System key.
2. Press System and Done keys simultaneously.
3. Hold keys for approximately five seconds, until the
screen changes.
4. When the display changes, release the System and
Done keys.
NOTE: See Table 4 for installer setup (ISU) numbers
and settings.
5. Use the Up and Down keys to change the value of
the ISU currently displayed.
6. Use the Go Back and Next keys to move from the
current ISU to another.
Installer System Tests
Use Installer System Test to test heating, cooling and fan.
For test details, refer to the latter portion of Table 4.
CAUTION
Equipment Damage Hazard.
Minimum compressor off time is bypassed
during Installer System Test
Avoid cycling compressor quickly.
IMPORTANT
The setting chosen for System Type (ISU 0170)
can prevent some System Test Numbers from
appearing.
Table 4. Installer Setup Menu.
Installer
Setup
Number
Installer Setup
Name
Default
Setting All Settings Notes
0120 Date (Year Upper) 20 20—20xx
21—21xx
Available year range: 2001 - 2178
0130 Date (Year Lower) 04 00-99 Available year range: 2001 - 2178
0140 Date (Month) 6 1-12
0150 Date (Day) 15 1-31 Available day range varies by month.
0160 Schedule Options 4 0—Non-Programmable
4—Programmable
0170 System Selection 8 1—1H/1C Conv
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—2H/2C HP
12—3H/2C HP
0180 Heat Fan Operation 0 0—System controls fan
1—Thermostat controls
fan (ON during call for
heat)
Only shown for conventional system with heat
stages and fan capability (ISU 0170) selected.
If heat pump is selected, fan always operates with
Thermostat control.
The only thing that allows the fan to turn off during
occupied periods is a manual override of the fan
from On to Auto.
0185 Pre-occupancy
Purge Duration
0 0—no duration
1—one hour
2—two hours
3—three hours
Only shown if thermostat is programmable
(ISU 0160).
0190 Reversing Valve
O/B
0 0—O (O/B On Cool)
1—B (O/B On Heat)
Only shown with heat pump system selected.
0220 Cycles Per Hour
(CPH) for first stage
compressor
3 1-6 Only shown for system with cool stages
(ISU 0170). Selection in this stage changes
second stage cool default CPH.
0230 CPH for second
stage compressor
3 1-6 Only shown for system with two stages of cool
(ISU 0170).
0240 CPH for first stage
conventional heat
5 1-12 Only shown for conventional system with heat
stages (ISU 0170).
Selection in this stage changes default CPH of
second stage heat.