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TB8220U  
Commercial VisionPRO™  
Programmable Thermostat  
INSTALLATION INSTRUCTIONS  
APPLICATION  
The TB8220U Programmable Thermostat provides electronic control of 24 Vac heating and cooling systems.  
See Table 1 for a description.  
Table 1. TB8220U Thermostat Description.  
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  
System Setting  
Fan Setting  
Manual or automatic changeover (selectable)  
Heat-Off-Cool-Auto  
Auto-On  
3.  
Installer must be a trained, experienced service  
technician.  
MERCURY NOTICE  
4. After installation is complete, check out product  
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.  
operation as provided in these instructions.  
CAUTION  
Contact your local waste management authority  
for instructions regarding recycling and the  
proper disposal of an old control.  
Electrical Shock or Equipment Damage  
Hazard.  
Can shock individuals or short equipment  
circuitry.  
Disconnect power supply before installation.  
INSTALLATION  
Select Thermostat Location  
When Installing this Product...  
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.  
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.  
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TB8220U COMMERCIAL VISIONPRO™ PROGRAMMABLE THERMOSTAT  
4
.
Remove the wallplate from the wall and drill two  
/16 in. holes in the wall (if drywall) as marked. For  
3
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.  
Pull the wires through the wire hole on the wallplate  
and position the wallplate over the wall anchors.  
Insert the mounting screws into the wall anchors  
and tighten.  
5
6
.
.
YES  
NO  
NO  
NO  
5 FEET  
1.5 METERS]  
[
WALL  
WIRES THROUGH WALL  
AND WIRE SLOT  
WALL ANCHORS (2)  
M22258  
Fig. 1. Select thermostat location.  
Do not install the thermostat where it can be affected by:  
MOUNTING  
HOLES  
—
—
—
—
—
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.  
MOUNTING  
SCREWS (2)  
M19916  
Separate Wallplate from Thermostat  
1.  
Separate the wallplate from the thermostat. See  
Fig. 2.  
Fig. 3. Install wallplate.  
WALLPLATE  
WIRE HOLE  
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. 7 through 17 for wiring diagrams for  
specific equipment applications.  
—
—
THERMOSTAT  
M22267  
Fig. 2. Separate wallplate from thermostat.  
1
.
Select set of terminal identifications that correspond  
to your system type (conventional or heat pump).  
(
See Fig. 4).  
Install Wallplate (See Fig. 3)  
Mount the thermostat horizontally on the wall:  
HEAT PUMP  
CONVENTIONAL  
1
2
.
.
Pull the wires through the wire hole on the wallplate.  
Position the wallplate on the wall with the arrow  
pointing up. Level the wallplate for appearance only.  
Use a pencil to mark the mounting holes.  
3.  
Y2  
L
Y2  
L
RC  
R
RC  
R
A
A
W
Y
G
O/B  
Y
W1  
S1  
S2  
W2  
S1  
S2  
G
C
C
SCREW  
TERMINALS  
M22780A  
Fig. 4. Terminal identifications for system type.  
. Loosen screw terminals used for the application.  
2
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TB8220U COMMERCIAL VISIONPRO™ PROGRAMMABLE THERMOSTAT  
3.  
Insert the wires into the terminal block and tighten  
each screw terminal. See Fig. 5.  
WIRE  
WALLPLATE  
M19917  
Fig. 5. Insert wires into terminal block.  
WALL OPENING  
SHADED AREA  
4
.
.
Push excess wire back into the wall opening and  
restrict wires to the shaded area. See Fig. 6.  
Plug the wall opening with nonflammable insulation  
to prevent drafts from affecting the thermostat.  
M22266  
5
Fig. 6. Restrict wires to shaded area of wire hole.  
Table 2. Terminal Designation Descriptions.  
Terminal Designation  
Description  
Power for cooling—connect to secondary side of cooling system transformer.  
Power for heating—connect to secondary side of heating system transformer.  
Compressor output.  
Rc (see Note 1)  
R (see Note 1)  
Y
C (see Note 2)  
Common wire from secondary side of cooling system transformer.  
Heat relay.  
W
G
Fan relay.  
W2  
Second stage heat relay.  
Y2  
Second stage cooling.  
O/B (see Note 3)  
A (see Note 4)  
S1 (See Note 5)  
S2 (See Note 5)  
L
Changeover valve for heat pumps.  
Economizer/Time-Of-Day (TOD) output—powered via R terminal.  
Optional outdoor or indoor remote sensor.  
Optional outdoor or indoor remote sensor.  
Powers red LED behind plastic in upper right corner of the thermostat.  
Auxiliary Heat Relay Output (Head Pump Mode 2H/1C, 3H/2C)  
W1  
NOTES:  
— The A signal is powered from the R terminal and  
energizes the economizer to signal occupied status  
and drive the damper to the set minimum position.  
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.  
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.  
If thermostat is configured for a heat pump in  
the Installer Setup, configure changeover  
valve for cool (O-factory setting) or heat (B).  
Reference economizer literature for wiring  
details. When set for economizer operation,  
the A terminal provides the occupancy signal.  
Table 3. Wiring Diagrams.  
2.  
Wallplate  
Terminal  
Identifications  
Wiring  
Diagram  
Figure  
System Type  
Standard Heat/Cool  
Heat Only  
Conventional  
Conventional  
Conventional  
Conventional  
Conventional  
7, 8  
9
3
.
.
Heat Only with Fan  
Cool only  
10  
4
11  
Standard Multistage  
up to 2 Heat/2 Cool  
12, 13  
(Power indicates occupied.)  
5.  
Sensor wires must have a cable separate  
from the thermostat control cable.  
Heat Pump  
(No Auxiliary Heat)  
Heat Pump  
Heat Pump  
14, 15  
16, 17  
Heat Pump  
Terminal “A” Wiring Details for Economizers  
(with Auxiliary Heat)  
—
Wire the A terminal to the W7212 “N” terminal, or the  
W7459 “TR” terminal.  
Multiple T7770A Sensors  
Multiple C7189U Sensors  
—
—
18, 19, 20  
21  
—
When using dual transformers at the thermostat, the  
heating transformer must power the economizer.  
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TB8220U COMMERCIAL VISIONPRO™ PROGRAMMABLE THERMOSTAT  
Conventional System Wiring  
Y2  
L
A
W2  
S1  
S2  
RC  
R
W
Y
G
C
2
1
L1  
Y2  
L
A
W2  
S1  
S2  
RC  
R
W
Y
G
C
1
(HOT)  
L2  
2
24 VAC  
L1  
HOT)  
(
24 VAC  
L2  
3
3
OUTDOOR/INDOOR  
TEMPERATURE  
SENSOR  
HEAT RELAY  
FAN RELAY  
OUTDOOR/INDOOR  
TEMPERATURE  
SENSOR  
ECONOMIZER  
COMPRESSOR CONTACTOR  
HEAT RELAY  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD  
PROTECTION AS REQUIRED.  
ECONOMIZER  
2
3
FACTORY INSTALLED JUMPER.  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD  
PROTECTION AS REQUIRED.  
WHEN USING BATTERIES, THE 24V COMMON CONNECTION IS  
OPTIONAL.  
M22783A  
2
3
FACTORY INSTALLED JUMPER.  
Fig. 9. Typical hookup of heat-only system.  
WHEN USING BATTERIES, THE 24V COMMON CONNECTION  
IS OPTIONAL.  
M22781A  
Y2  
L
A
W2  
S1  
S2  
RC  
R
W
Y
G
C
1
2
Fig. 7. Typical wiring of single transformer  
H/1C system.  
L1  
1
(HOT)  
2
4 VAC  
L2  
Y2  
L
A
W2  
S1  
S2  
RC  
2
1
R
W
Y
G
C
L1  
3
(HOT)  
24 VAC  
FAN RELAY  
HEAT RELAY  
ECONOMIZER  
L2  
OUTDOOR/INDOOR  
TEMPERATURE  
SENSOR  
3
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD  
PROTECTION AS REQUIRED.  
FAN RELAY  
OUTDOOR/INDOOR  
TEMPERATURE  
SENSOR  
1
2
3
COMPRESSOR CONTACTOR  
FACTORY INSTALLED JUMPER.  
L1  
HOT)  
(
WHEN USING BATTERIES, THE 24V COMMON CONNECTION  
IS OPTIONAL.  
HEAT RELAY  
ECONOMIZER  
24 VAC  
M22784A  
L2  
Fig. 10. Typical hookup of heat-only system with fan.  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD  
PROTECTION AS REQUIRED.  
2
3
REMOVE FACTORY INSTALLED JUMPER.  
Y2  
L
A
W2  
S1  
S2  
RC  
R
W
Y
G
C
1
2
WHEN USING BATTERIES, THE 24V COMMON CONNECTION  
IS OPTIONAL. WHEN USED, THE COMMON MUST CONNECT  
TO THE COOLING TRANSFORMER SECONDARY.  
L1  
(HOT)  
M22782A  
2
4 VAC  
L2  
Fig. 8. Typical hookup of dual transformer  
1
H/1C system.  
3
OUTDOOR/INDOOR  
TEMPERATURE  
SENSOR  
FAN RELAY  
COMPRESSOR CONTACTOR  
ECONOMIZER  
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD  
1
PROTECTION AS REQUIRED.  
2
3
FACTORY INSTALLED JUMPER.  
WHEN USING BATTERIES, THE 24V COMMON CONNECTION  
IS OPTIONAL.  
M22785A  
Fig. 11. Typical hookup of cool-only system.  
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TB8220U COMMERCIAL VISIONPRO™ PROGRAMMABLE THERMOSTAT  
Y2  
L
A
W2  
S1  
S2  
RC  
R
W
Y
G
C
2
1
Y2  
L
A
W2  
S1  
S2  
RC  
R
W
Y
G
C
2
1
L1  
L1  
(HOT)  
(HOT)  
24 VAC  
24 VAC  
L2  
L2  
3
3
OUTDOOR/INDOOR  
TEMPERATURE  
SENSOR  
FAN RELAY  
COOL RELAY 2  
COOL RELAY 1  
HEAT RELAY 1  
OUTDOOR/INDOOR  
TEMPERATURE  
SENSOR  
FAN RELAY  
COOL RELAY 2  
COOL RELAY 1  
1
HEAT RELAY 2  
ECONOMIZER  
HEAT RELAY 2  
ECONOMIZER  
L1  
HOT)  
(
HEAT RELAY 1  
24 VAC  
L2  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND  
OVERLOAD PROTECTION AS REQUIRED.  
FACTORY INSTALLED JUMPER.  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND  
OVERLOAD PROTECTION AS REQUIRED.  
REMOVE FACTORY INSTALLED JUMPER.  
2
3
2
3
WHEN USING BATTERIES, THE 24V COMMON CONNECTION  
IS OPTIONAL.  
M22786A  
WHEN USING BATTERIES, THE 24V COMMON CONNECTION  
IS OPTIONAL. WHEN USED, THE COMMON MUST CONNECT  
TO THE COOLING TRANSFORMER SECONDARY.  
M22787A  
Fig. 12. Typical hookup of single transformer  
multistage system (up to 2H/2C).  
Fig. 13. Typical hookup of dual transformer multistage  
system (up to 2H/2C).  
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TB8220U COMMERCIAL VISIONPRO™ PROGRAMMABLE THERMOSTAT  
Heat Pump System Wiring  
L1  
L1  
(
HOT)  
(HOT)  
Y2  
L
2
RC  
R
24 VAC  
Y2  
L
RC  
R
24 VAC  
2
L2  
L2  
A
O/B  
Y
4
1
A
O/B  
Y
4
1
W1  
S1  
S2  
W1  
S1  
S2  
G
G
C
C
3
3
FAN RELAY  
OUTDOOR/INDOOR  
TEMPERATURE  
FAN RELAY  
OUTDOOR/INDOOR  
TEMPERATURE  
5
5
COMPRESSOR CONTACTOR  
CHANGEOVER VALVE  
ECONOMIZER  
SENSOR  
COMPRESSOR CONTACTOR  
CHANGEOVER VALVE  
SENSOR  
ECONOMIZER  
AUXILIARY HEAT RELAY  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD  
PROTECTION AS REQUIRED.  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD  
PROTECTION AS REQUIRED.  
2
3
FACTORY INSTALLED JUMPER.  
2
3
FACTORY INSTALLED JUMPER.  
WHEN USING BATTERIES, THE 24V COMMON CONNECTION  
IS OPTIONAL.  
WHEN USING BATTERIES, THE 24V COMMON CONNECTION  
IS OPTIONAL.  
4
5
"O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B"  
IN THE INSTALLER SETUP.  
4
5
"O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B"  
IN THE INSTALLER SETUP.  
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR.  
AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A  
CABLE SEPARATE FROM THE THERMOSTAT CABLE.  
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR.  
AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A  
CABLE SEPARATE FROM THE THERMOSTAT CABLE.  
M22788A  
M22790A  
Fig. 14. Typical hookup of single-stage heat pump  
with no auxiliary heat (1H/1C).  
Fig. 16. Typical hookup of single-stage heat pump  
with auxiliary heat (2H/1C).  
L1  
L1  
(
HOT)  
(HOT)  
Y2  
L
2
RC  
R
24 VAC  
Y2  
L
24 VAC  
2
RC  
R
L2  
L2  
A
O/B  
Y
4
1
A
1
O/B  
Y
4
W1  
S1  
S2  
W1  
S1  
S2  
G
G
C
C
3
3
OUTDOOR/INDOOR  
TEMPERATURE  
FAN RELAY  
OUTDOOR/INDOOR  
TEMPERATURE  
5
FAN RELAY  
COMPRESSOR 1  
5
SENSOR  
SENSOR  
CHANGEOVER VALVE  
COMPRESSOR 2 COMPRESSOR 1  
CHANGEOVER VALVE  
COMPRESSOR 2  
ECONOMIZER  
AUXILIARY HEAT RELAY  
ECONOMIZER  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD  
PROTECTION AS REQUIRED.  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD  
PROTECTION AS REQUIRED.  
FACTORY INSTALLED JUMPER.  
2
3
FACTORY INSTALLED JUMPER.  
2
3
WHEN USING BATTERIES, THE 24V COMMON CONNECTION  
IS OPTIONAL.  
WHEN USING BATTERIES, THE 24V COMMON CONNECTION  
IS OPTIONAL.  
4
5
"O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B"  
IN THE INSTALLER SETUP.  
4
5
"
O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B"  
IN THE INSTALLER SETUP.  
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR.  
AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A  
CABLE SEPARATE FROM THE THERMOSTAT CABLE.  
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR.  
AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A  
CABLE SEPARATE FROM THE THERMOSTAT CABLE.  
M22789A  
M22791A  
Fig. 15. Typical hookup of multistage heat pump with  
no auxiliary heat (2H/2C).  
Fig. 17. Typical hookup of multistage heat pump  
with auxiliary heat (3H/2C).  
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TB8220U COMMERCIAL VISIONPRO™ PROGRAMMABLE THERMOSTAT  
Sensor Wiring for Temperature Averaging  
SUBBASE  
S2  
SUBBASE  
S2  
S1  
S1  
T7770A1006  
T7770A  
T
T7770A  
T
T
T
T
T
T4  
T3  
1
T7770A3002  
T7770A  
T
T7770A  
T
T7770A1006  
T T  
T
T
M22831  
1
THE T7770A3002 IS A 10K OHM SENSOR. M22934  
Fig. 18. Wiring four T7770A1006 (20K ohm) Sensors.  
Fig. 20. Wiring two T7770A1006 (20K ohm) Sensors  
and one T7770A3002 (10K ohm) sensor to provide a  
temperature averaging network  
SUBBASE  
S1  
S2  
Y2  
T4  
T3  
T4  
T3  
W2  
S1  
S2  
1
C7189  
C7189  
C7189  
C7189  
1
1
T7770A3002  
T7770A3002  
1
THE T7770A3002 IS A 10K OHM SENSOR.  
M22933  
Fig. 19. Wiring two T7770A3002 (10K ohm) Sensors to  
provide a temperature averaging network.  
1
WIRES MUST HAVE A CABLE SEPARATE FROM  
THE THERMOSTAT CABLE.  
M22935  
Fig. 21. Wiring four C7189U (10K ohm) Sensors to  
provide a temperature averaging network.  
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TB8220U COMMERCIAL VISIONPRO™ PROGRAMMABLE THERMOSTAT  
POWER THE THERMOSTAT  
You can choose from three methods to power the  
thermostat:  
IMPORTANT  
This tab must be removed in order to set the  
real-time clock.  
•
•
•
Batteries only (AAA alkaline).  
24 Vac direct connection only.  
24 Vac direct connection with battery backup (AAA  
alkaline).  
REMOVE  
TAB  
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.  
M
V
 D
 I
  G
SALTION  
•
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.  
M
 V
 D
  R
   G
SALTION  
Installing Batteries  
M19920  
1.  
Install three AAA alkaline batteries on the back of  
the thermostat as marked. See Fig. 22.  
Fig. 23. Remove tab labeled REMOVE from  
thermostat back.  
Setting Calendar and Time  
Setting Calendar  
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 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.  
BATTERIES (3)  
M19918  
SETTING CALENDAR AFTER THERMOSTAT IS ALREADY  
FUNCTIONING  
Fig. 22. Installing batteries.  
2.  
Locate and remove the tab labeled Remove. See  
Fig. 23.  
See steps 1 through 4, in the Advanced Settings section,  
to set year, month and day.  
SET CURRENT DAY  
SET MONTH  
MM OO NN  
TUE  
WED  
THU  
F RR II  
SA  
SUN  
MON  
WEDD  
THU  
FRI  
SA  
SUN  
OK TO PICK MULTIPLE DAYS SCREEN LOCKED  
CHANGE FILTER UV LAMP HUMIDIFIER PAD  
OK TO PICK MULTIPLE DAYS SCREEN LOCKED  
CHANGE FILTER UV LAMP HUMIDIFIER PAD  
PM  
DONE  
DONE  
USE ARROWS TO SET YEAR AND TIME  
M22761  
Fig. 24. Setting calendar and time after initial powerup.  
it snaps into place. See Fig. 25.  
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  
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TB8220U COMMERCIAL VISIONPRO™ PROGRAMMABLE THERMOSTAT  
Advanced Settings  
WALL  
The thermostat has advanced settings to match the HVAC  
system. These settings can be adjusted to match specific  
needs. Access to these settings is obtained as follows:  
1
2
3
.
.
.
From the main screen, press SYSTEM. Five blank  
touch keys show on the bottom of the screen  
between DONE and CANCEL.  
Press and hold the two blank keys on either side of  
the center blank key for approximately five seconds.  
(
See Fig. 26.)  
The Setup Number displays to the lower-left area 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.  
TION  
LA  
M
O
 V
 E
 D
  U
  R
  I
   N
   G
INST  
M19919  
Fig. 25. Mount thermostat to wallplate.  
INSTALLER SETUP NUMBERS, SETTINGS, AND TESTS (TABLE 4)  
Installer System Tests  
Use the Installer System Test to test the heating, cooling  
and fan. Refer to the latter portion of Table 4.  
MO  
TU  
WE  
TH  
FR  
SA  
SU  
Inside  
Set To  
CAUTION  
Following  
Schedule  
Equipment Damage Hazard.  
Minimum compressor off time is bypassed  
during Installer System Test  
Avoid cycling compressor quickly.  
SYSTE  
M
EM  
HEAT  
OFF  
DONE  
CANC  
IMPORTANT  
Use Installer System Test to test heating, cooling  
and fan. The setting chosen for System Type  
(
Installer Setup Number 0170) can prevent some  
System Test Numbers from appearing.  
M19923  
Fig. 26. Entering Installer Setup.  
Table 4. Installer Setup Menu.  
Installer  
Setup  
Number  
Installer Setup  
Name  
Default  
Setting  
All Settings  
20—20xx  
1—21xx  
Notes  
0120  
Date (Year Upper) 20  
Available year range: 2001 - 2178  
2
0130  
0140  
0150  
0160  
Date (Year Lower) 04  
00-99  
1-12  
Available year range: 2001 - 2178  
Date (Month)  
Date (Day)  
6
15  
4
1-31 (Month Dependent)  
0—Non-Programmable  
Schedule Options  
4
—Programmable  
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Table 4. Installer Setup Menu. (Continued)  
Installer  
Setup  
Number  
Installer Setup  
Name  
Default  
Setting  
All Settings  
1—1H/1C Conv  
Notes  
0
170  
System Selection  
8
To use the Emergency Heat button, select setting  
#7 or #12. See Fig. 16 or 17 for auxiliary heat  
wiring.  
2
3
4
6
7
8
9
1
—1H/1C HP  
—1H w/o fan  
—1H with fan  
—1C  
—2H/1C HP (Aux. Heat)  
—2H/2C Conv  
—2H/1C Conv  
0—1H/2C Conv  
1
1
1—2H/2C HP  
2—3H/2C HP (Aux.  
Heat)  
0175  
0180  
0185  
TOD/Economizer  
output (terminal A)  
0
0—Unused  
1—TOD  
Economizer energizes A during a call for cool.  
TOD energizes A during Occupied period, and de-  
energizes A during Unoccupied.  
2
—Economizer  
0—Fossil  
—Electric  
Heat Fan Operation 0  
Only shown for conventional system with heat  
stages and fan capability selected. If heat pump is  
selected, fan defaults to electric.  
1
Pre-occupancy  
Purge Duration  
0
0—no duration  
1—one hour  
Shown only if system has fan and schedule  
programmable.  
2
3
—two hours  
—three hours  
Pre-occupancy purge enabled by nonzero duration  
(and sends economizer to minimum position).  
0
190  
220  
Reversing Valve  
O/B  
0
3
0—O (O/B On Cool)  
1—B (O/B On Heat)  
Only shown with heat pump system selected.  
0
Cycles Per Hour  
1-6  
Only shown for system with cool stages. Selection  
in this stage changes default CPH of second stage  
cool.  
(
CPH) for first stage  
compressor  
0
230  
240  
CPH for second  
stage compressor  
3
5
1-6  
Only shown if two stages of cool selected.  
0
CPH for first stage  
conventional heat  
1-12  
Only shown if system is conventional with heat  
stages.  
Selection in this stage changes default CPH of  
second stage heat.  
0250  
CPH for second  
stage conventional  
heat  
9
1-12  
Only shown with at least two stages conventional  
heat or 2H/1C heat pump selected.  
0260  
0270  
0280  
CPH for third Stage  
Heat  
9
9
0
1-12  
1-12  
Only shown if 3H/2C heat pump is selected.  
CPH for Auxiliary  
Heat  
Only shown if multi-stage heat pump is selected  
(heat pump with more heat than cool stages).  
Continuous  
Backlight  
0—No  
1—Yes  
Always shown. If AC power not present the option  
is overridden and normal backlight operation  
occurs.  
0
300  
310  
Changeover  
Deadband  
1
0—Manual  
Only shown if system has both heat and cool  
stages.  
1
—Auto  
0
3°F  
2 (1.5)—2°F (1.5°C)  
3 (2.0)—3°F (2.0°C)  
Only shown if Automatic Changeover Selected  
(2°C)  
4
5
6
7
8
9
(2.5)—4°F (2.5°C)  
(3.0)—5°F (3.0°C)  
(3.5)—6°F (3.5°C)  
(4.0)—7°F (4.0°C)  
(4.5)—8°F (4.5°C)  
(5.0)—9°F (5.0°C)  
0
320  
330  
Temperature  
Indication Scale  
0
2
0—°F  
1—°C  
0
Daylight Saving  
0—Disabled  
1
2
3
—Enabled (US 1987)  
—Enable (US 2007)  
—Enabled (Europe)  
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TB8220U COMMERCIAL VISIONPRO™ PROGRAMMABLE THERMOSTAT  
Table 4. Installer Setup Menu. (Continued)  
Installer  
Setup  
Number  
Installer Setup  
Name  
Default  
Setting  
All Settings  
0—None  
1—Outdoor for Display  
2—Outdoor for Control  
Notes  
0340  
Remote  
Temperature  
Sensor  
0
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).  
3
4
—Remote 10K Indoor  
—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)  
Only shown for heat pump systems with more heat  
stages than cool selected and remote sensor  
selection is outdoor for control.  
2
3
3
4
4
5(-4.0)—25°F (-4.0°C)  
0(-1.0)—30°F (-1.0°C)  
5(1.5)—35°F (1.5°C)  
0(4.5)—40°F (4.5°C)  
5(7.0)—45°F (7.0°C)  
Must enforce a dead band between this and  
Auxiliary Lockout  
0
360  
535  
Heat Pump  
Auxiliary Lockout  
0
3
0—None  
40(4.5)—40°F (4.5°C)  
Only shown for heat pump systems with more heat  
stages than cool selected and remote sensor  
selection is outdoor for control.  
4
5
5
6
5(7.0)—45°F (7.0°C)  
0(10.0)—50°F (10.0°C) Must enforce a dead band between this and Heat  
5(13.0)—55°F (13.0°C) Pump Compressor Lockout.  
0(15.5)—60°F (15.5°C)  
0
Temporary  
Occupied Duration  
Limit  
0—no duration  
1—one hour  
2—two hours  
0 means no limit  
3
4
—three hours  
—four hours  
0
540  
580  
Number of Periods  
4
5
2—2 Periods  
—4 Periods  
Does not appear if Non-programmable is chosen.  
Applies to all days of the week. With 2 selected the  
4
“
Cancel Period” option does not appear on the  
display.  
0
Minimum  
Compressor Off  
Time  
0—Off  
2—2 minutes  
3—3 minutes  
Only shown if system has cool stages.  
4
5
—4 minutes  
—5 minutes  
0600  
0610  
0640  
0650  
0660  
0670  
Heat Temperature 90  
Range Stops  
40 to 90°F (4 to 32°C)  
50 to 99°F (10 to 37°C)  
12—12 Hour  
Only shown if system has heat stages.  
Only shown if system has cool stages.  
Cool Temperature 50  
Range Stops  
Clock Format  
12  
2
4—24 Hour  
Extended Fan-on  
time Heat  
0
0—Off  
90—90 seconds  
Not displayed with fan set to fossil or with cool-only  
systems  
Extended Fan-on  
time Cool  
0
0—Off  
40—40 seconds  
Only shown if system has cool stages.  
Keypad Lockout  
0
0—Unlocked  
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.  
1
2
3
—Partial Lockout 1  
—Partial Lockout 2  
—Fully Locked  
0
680  
685  
Temperature  
Control Heat  
2
5
1—Less Aggressive  
2—Standard  
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.)  
3
—More Aggressive  
0
Recovery Heat  
Ramp Rate  
0-20°F/hour  
Only shown if system has heat stages.  
0 disables ramped recovery (step setpoint change  
at period start time).  
11  
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Table 4. Installer Setup Menu. (Continued)  
Installer  
Setup  
Number  
Installer Setup  
Name  
Default  
Setting  
All Settings  
Notes  
0690  
Temperature  
Control Cool  
2
1—Less Aggressive  
2—Standard  
Only shown if system has cool stages.  
Only integral gains affected. Affects control  
operation in all control regimes (not just recovery  
or setpoint change).  
3
—More Aggressive  
More Aggressive stops signal prior to reaching the  
setpoint. (For use with oversized equipment.)  
0
695  
700  
Recovery Cool  
Ramp Rate  
3
0
0-20°F/hour  
Only shown if system has cool stages.  
0 disables ramped recovery (step setpoint change  
at period start time).  
0
Temperature  
Display Offset  
-3 (-1.5)— -3°F (-1.5°C) This offset applies to both the control temperature  
-2 (-1.0)— -2°F (-1.0°C) and to the display temperature for indoor sensor  
-
1 (-0.5)— -1°F (-0.5°C) (and remote indoor sensor).  
0
1
2
3
(0.0)—0°F (0.0°C)  
(0.5)—1°F (0.5°C)  
(1.0)— 2°F (1.0°C)  
(1.5)—3°F (1.5°C)  
0
710  
Restore Factory  
Defaults  
0
0
0—No  
1—Yes  
Resets all ISU parameters to default values and  
resets the schedule to default Energy Star. Retains  
only calendar settings and time.  
INSTALLER TESTS  
Test 1  
Installer Test  
Cool  
0—Off  
1—Cool Stage 1  
2
—Cool Stage 2  
Test 2  
Test 3  
Installer Test  
Fan  
0
0
0—Off  
1—Fan On  
Installer Test  
Heat  
0—Off  
1—Heat Stage 1  
2
3
—Heat Stage 1 and 2  
—Heat Stage 1,2 and 3  
Test 4  
Test 8  
Installer Test  
Auxiliary Heat  
0
0
0—Auxiliary Heat Off  
1—Auxiliary Heat On  
Installer Test  
TOD/Economizer  
0—TOD/Economizer Off  
1—TOD/Economizer On  
NOTE: Press the Done button to exit the Installer System Test.  
Table 5. Energy Star Default Program Settings.  
Setpoints  
OPERATION  
Schedule  
Period  
Fan  
Time  
Heat  
70°F  
21°C)  
10:00pm 55°F  
(10°C)  
Cool  
Setting  
System Settings  
Occ1  
8:00am  
78°F  
(25.5°C)  
Auto  
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.  
(
Unocc1  
85°F  
(29.5°C)  
Auto  
Occ2a  
—
—
—
—
—
—
—
Unocc2a  
—
Fan Settings  
aThe thermostat default setting is two period only. To use  
four periods, change the appropriate setup parameter.  
Auto —Fan runs only when heating/cooling system is on.  
On—Fan runs continuously.  
Table 5 shows default program settings. See Owner’s  
Guide for complete instructions to change the program.  
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.”  
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  
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TB8220U COMMERCIAL VISIONPRO™ PROGRAMMABLE THERMOSTAT  
—
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.  
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.  
“
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.  
Heat Pump with Auxiliary (Backup) Heat and  
Outdoor Temperature Sensor  
1
2
3
.
.
.
Choose correct heat pump application in Installer  
Setup Number 0170.  
Choose Outdoor Temperature Sensor for  
Control Option in Installer Setup Number 0340.  
Choose Compressor Lockout Temperature in  
Installer Setup Number 0350.  
Economizer/TOD Logic (Table 6)  
Table 6. Operation of Terminal A.  
Terminal A  
Effective  
Call for  
Cool  
Occupancy  
Economizer  
Energized  
TOD  
4. Choose Auxiliary Lockout Temperature in  
Installer Setup Number 0360.  
Occupied  
—
Energized  
Unoccupied Yes  
No  
Energized  
De-energized  
NOTE: There is a 5°F deadband between Compressor  
and Auxiliary Heat lockout temperatures.  
De-energized De-energized  
Energized Energized  
Override  
—
Operation in Heat Mode  
When the outdoor temperature is:  
Heat Pump Temperature Lockouts  
—
—
—
Below the Compressor Lockout Temperature, only the  
Auxiliary Heat operates.  
Above the Auxiliary Lockout Temperature, only the  
Compressor operates. See Fig. 31.  
Between the two temperatures, both the Compressor  
and Auxiliary Heat operate.  
Dual Fuel Heat Pump and Outdoor 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 Installer  
Setup Number 0170.  
2
.
Choose Outdoor Temperature Sensor for Heat  
Pump Temperature Lockouts Option in Installer  
Setup Number 0340.  
Choose appropriate Balance Point Temperature  
in Installer Setup Number 0350.  
COMPRESSOR ONLY  
AUXILIARY  
5
3
0
5
LOCKOUT  
TEMPERATURE  
3.  
BOTH COMPRESSOR AND  
AUXILIARY HEAT  
COMPRESSOR  
LOCKOUT  
OPERATION IN HEAT MODE ABOVE BALANCE POINT  
OUTDOOR TEMPERATURE)  
TEMPERATURE  
AUXILIARY ONLY  
(
M19950  
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.  
Fig. 27. Heat Pump Operation with Lockout  
Temperatures Set.  
1
3
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TROUBLESHOOTING (TABLE 7)  
Table 7. 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.  
The upper or lower temperature limits Check temperature setpoints.  
were reached. Check Installer Setup Numbers 0600 and  
610; modify as needed.  
0
The keypad is fully locked.  
Check Installer Setup Number 0670 to  
change keypad locked options.  
Heating or cooling does not  
come on.  
Thermostat minimum off-time is  
activated.  
Wait up to five minutes for the system to  
respond.  
System selection not set to Heat or  
Cool.  
Set system Selection to correct position.  
System type Selection is incorrect.  
Check Installer Setup Number 0170 and  
make sure correct System type is chosen.  
Thermostat is calling for Heat Heating or cooling equipment is not  
Heat on) or Cool (Cool on) but operating.  
no heating or cooling is  
running.  
Check wiring.  
(
Check Installer Setup Number 0170 and  
make sure correct system type is chosen.  
Verify operation of equipment in System Test  
mode.  
Heat does not turn on (Heat  
On is solid in the display).  
Heating equipment failure.  
Check for 24 Vac at the equipment on the  
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.  
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.  
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.  
Heat pump puts out cool air in Changeover Valve (Installer Setup  
the heat mode and warm air in Number 0190) is not configured to  
Set Changeover Valve (Installer Setup  
Number 0190) to match the changeover  
the cool mode.  
match the changeover required by the required by the installed heat pump.  
installed heat pump.  
Both the heating and cooling The heating equipment is not a heat  
equipment are running at the pump but the System Type (Installer  
Set System Type (Installer Setup Number  
0170) to match the installed heating and/or  
cooling equipment.  
same time.  
Setup Number 0170) is set to Heat  
Pump.  
Heating and cooling wires are shorted Separate the shorted heating and cooling  
together.  
wires.  
Cooling does not turn on (Cool Cooling equipment failure.  
On is solid in the display).  
Check for 24 Vac at the equipment on the  
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.  
Loose or broken wire connection  
between thermostat and cooling  
equipment.  
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.  
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TB8220U COMMERCIAL VISIONPRO™ PROGRAMMABLE THERMOSTAT  
Table 7. Troubleshooting. (Continued)  
Symptom  
Fan does not turn on in a call Fan Control in Heating is set to Gas or Set Fan Control in Heating to Electric  
for heat (electric furnace). Oil Furnace (Setting 0180). Furnace (Setting 0180).  
Heating equipment is running Heating equipment is not a heat pump Set System Type (Installer Setup Number  
Possible Cause  
Action  
in the cool mode.  
but System Type (Installer Setup  
Number 0170) is set to Heat Pump.  
0170) to match the installed heating and/or  
cooling equipment.  
Heating equipment does not  
turn off and heat temperature but System Type (Installer Setup  
setting is set below room  
temperature (Heat On is not in  
the display).  
Heating equipment is not a heat pump Set System Type (Installer Setup Number  
0170) to match the installed heating and/or  
cooling equipment.  
Number 0170) is set to Heat Pump.  
Cannot set the system setting System Type (Installer Setup Number Set System Type (Installer Setup Number  
to Heat.  
0170) is set to Cool Only.  
0170) to match the installed heating and/or  
cooling equipment.  
Cannot set the system setting System Type (Installer Setup Number Set System Type (Installer Setup Number  
to Cool. 0170) is set to Heat Only or Heat Only 0170) to match the installed heating and/or  
with Fan. cooling equipment.  
Heat On is not in the display. System setting is not set to Heat and/or Set the system setting to Heat and set the  
temperature setting is not set above  
room temperature.  
temperature setting above the room  
temperature.  
Cool On is not in the display.  
Wait is in the display.  
System setting is not set to Cool and/or Set the system setting to Cool and set the  
the temperature setting is not set below temperature setting below the room  
room temperature.  
temperature.  
Compressor minimum off timer is  
active.  
Wait up to five minutes for the cooling or  
heating (heat pump) equipment to turn on.  
1
5
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TB8220U COMMERCIAL VISIONPRO™ PROGRAMMABLE THERMOSTAT  
SPECIFICATIONS  
Electrical Ratings:  
Thermostat Dimensions: 3-3/4 in. (95 mm) high x 6 in.  
152 mm) wide x 1-3/8in. (35 mm) deep.  
(
Voltage  
(50/60 Hz)  
Running  
Current  
Terminal  
W (Heating)  
Y (Cooling)  
G (Fan)  
Accessories:  
20 - 30 Vac  
20 - 30 Vac  
20 - 30 Vac  
0.02 - 1.0A  
0.02 - 1.0A  
0.02 - 0.60A  
0.02 - 1.0A  
C7089U Outdoor Sensor: 10K ohm NTC.  
C7189U Remote Indoor Sensor: 10K ohm NTC.  
C7772 Flush-Mount Remote Indoor Sensor:  
2
0K ohm NTC.  
T7770A1006 Wall-Mount Remote Indoor Sensor:  
0K ohm NTC.  
T7770A3002 Wall-Mount Remote Indoor Sensor:  
0K ohm NTC.  
A (Economizer/TOD) 20 - 30 Vac  
2
Temperature Setting Range:  
Heating: 40°F to 90°F (4.5°C to 32°C).  
Cooling: 50°F to 99°F (10°C to 37°C).  
1
Perchlorate Material  
This thermostat contains a Lithium battery which may  
contain Perchlorate material.  
Operating Ambient Temperature:  
0°F to 120°F (-18°C to 49°C).  
Shipping Temperature:  
30°F to 150°F (-34.4°C to 65.6°C).  
The following statement is required:  
Perchlorate Material—special handling may apply.  
See www.dtsc.ca.gov/hazardouswaste/perchlorate  
-
Operating Relative Humidity (Non-condensing):  
% to 90%.  
5
Automation and Control Solutions  
Honeywell International Inc.  
Honeywell Limited-Honeywell Limitée  
1985 Douglas Drive North  
35 Dynamic Drive  
Golden Valley, MN 55422  
customer.honeywell.com  
Toronto, Ontario M1V 4Z9  
®
©
U.S. Registered Trademark  
2008 Honeywell International Inc.  
62-3070—03 M.S. Rev. 01-08  

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