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 Powering Methods Description Battery only Direct connection to a 24 Vac transformer only Direct connection to a 24 Vac transformer with battery backup Conventional (up to 2 Heat, 2 Cool stages) Heat Pump (up to 3 Heat, 2 Cool stages) Manual or automatic changeover (selectable) Heat-Off-Cool-Auto Auto-On 3. 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. Installer must be a trained, experienced service technician. After installation is complete, check out product operation as provided in these instructions.
System Types Changeover System Setting Fan Setting

MERCURY NOTICE

CAUTION

INSTALLATION

When Installing this Product.
1. 2. Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition. Check ratings given in instructions and on the product to ensure the product is suitable for your application.
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.

62-3070-03

TB8220U COMMERCIAL VISIONPRO PROGRAMMABLE THERMOSTAT 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.
WALL WIRES THROUGH WALL AND WIRE SLOT WALL ANCHORS (2)
YES NO NO 5 FEET [1.5 METERS]

M22258

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.

MOUNTING HOLES

MOUNTING SCREWS (2)

M19916

Separate Wallplate from Thermostat
1. Separate the wallplate from the thermostat. See Fig. 2.

WALLPLATE WIRE HOLE

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. 7 through 17 for wiring diagrams for specific equipment applications.

THERMOSTAT

M22267
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.
1. Select set of terminal identifications that correspond to your system type (conventional or heat pump). (See Fig. 4).

HEAT PUMP CONVENTIONAL

Y2 L A W1 S1 S2

Y2 L A W2 S1 S2

RC R W Y G C

RC R O/B Y G C

SCREW TERMINALS

M22780A

Fig. 4. Terminal identifications for system type. 2. Loosen screw terminals used for the application.

62-307003

TB8220U COMMERCIAL VISIONPRO PROGRAMMABLE THERMOSTAT 3. Insert the wires into the terminal block and tighten each screw terminal. See Fig. 5.

WALLPLATE

M19917
Fig. 5. Insert wires into terminal block. 4. 5. 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.

WALL OPENING SHADED AREA

M22266
Fig. 6. Restrict wires to shaded area of wire hole.
Table 2. Terminal Designation Descriptions. Terminal Designation Rc (see Note 1) R (see Note 1) Y C (see Note 2) W G W2 Y2 O/B (see Note 3) A (see Note 4) S1 (See Note 5) S2 (See Note 5) L W1 NOTES: 1. Description Power for coolingconnect to secondary side of cooling system transformer. Power for heatingconnect to secondary side of heating system transformer. Compressor output. Common wire from secondary side of cooling system transformer. Heat relay. Fan relay. Second stage heat relay. Second stage cooling. Changeover valve for heat pumps. Economizer/Time-Of-Day (TOD) outputpowered 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) 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. (Power indicates occupied.) Sensor wires must have a cable separate from the thermostat control cable. 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. Table 3. Wiring Diagrams. Wallplate Terminal Identifications Conventional Conventional Conventional Conventional Conventional Heat Pump Heat Pump Wiring Diagram Figure 7, 12, 13 14, 15 16, 17 18, 19, 20 21
System Type Standard Heat/Cool Heat Only Heat Only with Fan Cool only Standard Multistage up to 2 Heat/2 Cool Heat Pump (No Auxiliary Heat) Heat Pump (with Auxiliary Heat) Multiple T7770A Sensors Multiple C7189U Sensors
Terminal A Wiring Details for Economizers
Wire the A terminal to the W7212 N terminal, or the W7459 TR terminal. When using dual transformers at the thermostat, the heating transformer must power the economizer.
TB8220U COMMERCIAL VISIONPRO PROGRAMMABLE THERMOSTAT
Conventional System Wiring
Y2 L A W2 S1 S2 RC R W Y G C

L1 (HOT) 24 VAC LFAN RELAY OUTDOOR/INDOOR TEMPERATURE SENSOR ECONOMIZER 3 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. FACTORY INSTALLED JUMPER. WHEN USING BATTERIES, THE 24V COMMON CONNECTION M22781A IS OPTIONAL. COMPRESSOR CONTACTOR HEAT RELAY 3

1 L1 (HOT) L2

3 OUTDOOR/INDOOR TEMPERATURE SENSOR HEAT RELAY ECONOMIZER POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. FACTORY INSTALLED JUMPER. WHEN USING BATTERIES, THE 24V COMMON CONNECTION IS OPTIONAL. M22783A
Fig. 9. Typical hookup of heat-only system.
Fig. 7. Typical wiring of single transformer 1H/1C system.

1 L1 (HOT) 24 VAC L2

3 FAN RELAY OUTDOOR/INDOOR TEMPERATURE SENSOR 1 HEAT RELAY ECONOMIZER
3 FAN RELAY COMPRESSOR CONTACTOR HEAT RELAY 1 L1 (HOT) LPOWER 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.
OUTDOOR/INDOOR TEMPERATURE SENSOR ECONOMIZER
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. FACTORY INSTALLED JUMPER. WHEN USING BATTERIES, THE 24V COMMON CONNECTION IS OPTIONAL.

M22784A

24 VAC
Fig. 10. Typical hookup of heat-only system with fan.

M22782A

Fig. 8. Typical hookup of dual transformer 1H/1C system.
OUTDOOR/INDOOR TEMPERATURE SENSOR
3 FAN RELAY COMPRESSOR CONTACTOR
ECONOMIZER 3 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. FACTORY INSTALLED JUMPER. WHEN USING BATTERIES, THE 24V COMMON CONNECTION IS OPTIONAL. M22785A
Fig. 11. Typical hookup of cool-only system.
OUTDOOR/INDOOR TEMPERATURE SENSOR HEAT RELAY 2 ECONOMIZER 3
1 L1 (HOT) 24 VAC LFAN RELAY
OUTDOOR/INDOOR TEMPERATURE SENSOR HEAT RELAY 2

COOL RELAY 2

COOL RELAY 1

COOL RELAY VAC

HEAT RELAY 1

ECONOMIZER 1 2

M22786A
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.

Fig. 12. Typical hookup of single transformer multistage system (up to 2H/2C).

M22787A

Fig. 13. Typical hookup of dual transformer multistage system (up to 2H/2C).

Heat Pump System Wiring

L1 (HOT) Y2 L A W1 S1 S2 OUTDOOR/INDOOR TEMPERATURE SENSOR ECONOMIZER RC R O/B 4 Y G C 3 FAN RELAY COMPRESSOR CONTACTOR CHANGEOVER VALVE 24 VAC LY2 L A W1 S1 S2 OUTDOOR/INDOOR TEMPERATURE SENSOR 2 RC R O/B 4 Y G C 3 FAN RELAY COMPRESSOR CONTACTOR CHANGEOVER VALVE AUXILIARY HEAT RELAY ECONOMIZER 24 VAC LL1 (HOT)
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. 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).
L1 (HOT) Y2 L A W1 S1 S2 OUTDOOR/INDOOR TEMPERATURE SENSOR 2 RC R O/B 4 Y G C 3 FAN RELAY CHANGEOVER VALVE COMPRESSOR VAC L2 1
Fig. 16. Typical hookup of single-stage heat pump with auxiliary heat (2H/1C).
L1 (HOT) Y2 L A W1 S1 S2 OUTDOOR/INDOOR TEMPERATURE SENSOR 2 RC R O/B 4 Y G C 3 FAN RELAY COMPRESSOR 1 CHANGEOVER VALVE COMPRESSOR VAC L2 1

ECONOMIZER

AUXILIARY HEAT RELAY ECONOMIZER 5

M22789A

COMPRESSOR 2

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).
Sensor Wiring for Temperature Averaging
SUBBASE S1 T7770A T T S2 T7770A T T S1 T7770A1006 T T T4 T3 SUBBASE S2
1 T7770A3002 T7770A T T T7770A T T T7770A1006 T T

M22831

1 THE T7770A3002 IS A 10K OHM SENSOR. M22934
Fig. 18. Wiring four T7770A1006 (20K ohm) Sensors.

SUBBASE S1 S2

Fig. 20. Wiring two T7770A1006 (20K ohm) Sensors and one T7770A3002 (10K ohm) sensor to provide a temperature averaging network
Y2 T4 T3 T4 T3 W2 ST7770AT7770A3002 C7189 C7189 SC7189 C7189
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.

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). IMPORTANT This tab must be removed in order to set the real-time clock.

Installing Batteries

1. Install three AAA alkaline batteries on the back of the thermostat as marked. See Fig. 22.
REMOVE DURING INSTALLATION
Single-Transformer SystemConnect 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 SystemConnect 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.

Wiring 24 Vac Common

REMOVE TAB

M19920

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. SETTING CALENDAR AFTER THERMOSTAT IS ALREADY FUNCTIONING See steps 1 through 4, in the Advanced Settings section, to set year, month and day.

BATTERIES (3)

M19918
Fig. 22. Installing batteries. 2. Locate and remove the tab labeled Remove. See Fig. 23.
SET CURRENT DAY SET MONTH
OK TO PICK MULTIPLE DAYS SCREEN LOCKED CHANGE FILTER UV LAMP HUMIDIFIER PAD
USE ARROWS TO SET YEAR AND TIME

M22761

Fig. 24. Setting calendar and time after initial powerup.
Mount Thermostat to Wallplate
1. 2. Align the terminal screw blocks with the pins on the back of the thermostat. Push the thermostat straight onto the wallplate until
it snaps into place. See Fig. 25.

Advanced Settings

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. From the main screen, press SYSTEM. Five blank touch keys show on the bottom of the screen between DONE and CANCEL. 2. Press and hold the two blank keys on either side of the center blank key for approximately five seconds. (See Fig. 26.) 3. 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.

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

Following Schedule

SYSTE M EM HEAT

Equipment Damage Hazard. Minimum compressor off time is bypassed during Installer System Test Avoid cycling compressor quickly.
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 0160 Installer Setup Name Date (Year Upper) Date (Year Lower) Date (Month) Date (Day) Schedule Options Default Setting 4
All Settings 2020xx 2121xx 00-99 1-12 1-31 (Month Dependent) 0Non-Programmable 4Programmable
Notes Available year range: 2001 - 2178 Available year range: 2001 - 2178
TB8220U COMMERCIAL VISIONPRO PROGRAMMABLE THERMOSTAT Table 4. Installer Setup Menu. (Continued) Installer Setup Number 0170 Installer Setup Name System Selection Default Setting 8

All Settings

11H/1C Conv To use the Emergency Heat button, select setting 21H/1C HP #7 or #12. See Fig. 16 or 17 for auxiliary heat 31H w/o fan wiring. 41H with fan 61C 72H/1C HP (Aux. Heat) 82H/2C Conv 92H/1C Conv 101H/2C Conv 112H/2C HP 123H/2C HP (Aux. Heat) 0Unused 1TOD 2Economizer 0Fossil 1Electric 0no duration 1one hour 2two hours 3three hours 0O (O/B On Cool) 1B (O/B On Heat) 1-6 Economizer energizes A during a call for cool. TOD energizes A during Occupied period, and deenergizes A during Unoccupied. 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 (and sends economizer to minimum position). Only shown with heat pump system selected. Only shown for system with cool stages. Selection in this stage changes default CPH of second stage cool. Only shown if two stages of cool selected. Only shown if system is conventional with heat stages. Selection in this stage changes default CPH of second stage heat. Only shown with at least two stages conventional heat or 2H/1C heat pump selected. Only shown if 3H/2C heat pump is selected. Only shown if multi-stage heat pump is selected (heat pump with more heat than cool stages). 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. Only shown if Automatic Changeover Selected
TOD/Economizer output (terminal A)

Heat Fan Operation 0

Pre-occupancy Purge Duration

0190 0220

Reversing Valve O/B
Cycles Per Hour 3 (CPH) for first stage compressor CPH for second stage compressor CPH for first stage conventional heat 3 5

0230 0240

1-6 1-12
CPH for second 9 stage conventional heat CPH for third Stage 9 Heat CPH for Auxiliary Heat Continuous Backlight Changeover Deadband 9 0
1-12 1-12 0No 1Yes 0Manual 1Auto 2 (1.5)2F (1.5C) 3 (2.0)3F (2.0C) 4 (2.5)4F (2.5C) 5 (3.0)5F (3.0C) 6 (3.5)6F (3.5C) 7 (4.0)7F (4.0C) 8 (4.5)8F (4.5C) 9 (5.0)9F (5.0C) 0F 1C 0Disabled 1Enabled (US 1987) 2Enable (US 2007) 3Enabled (Europe)

0300 0310

1 3F (2C)

0320 0330

Temperature Indication Scale Daylight Saving
TB8220U COMMERCIAL VISIONPRO PROGRAMMABLE THERMOSTAT Table 4. Installer Setup Menu. (Continued) Installer Setup Number 0340 Installer Setup Name Remote Temperature Sensor Default Setting 0
All Settings 0None 1Outdoor for Display 2Outdoor for Control 3Remote 10K Indoor 4Remote 20K Indoor 0None 15(-9.5)15F (-9.5C) 20(-6.5)20F (-6.5C) 25(-4.0)25F (-4.0C) 30(-1.0)30F (-1.0C) 35(1.5)35F (1.5C) 40(4.5)40F (4.5C) 45(7.0)45F (7.0C) 0None 40(4.5)40F (4.5C) 45(7.0)45F (7.0C) 50(10.0)50F (10.0C) 55(13.0)55F (13.0C) 60(15.5)60F (15.5C) 0no duration 1one hour 2two hours 3three hours 4four hours 22 Periods 44 Periods
Notes 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). 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
Heat Pump Compressor Lockout
Heat Pump Auxiliary Lockout
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. 0 means no limit
Temporary Occupied Duration Limit

Number of Periods 4

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. Only shown if system has cool stages.
Minimum Compressor Off Time
0Off 22 minutes 33 minutes 44 minutes 55 minutes 40 to 90F (4 to 32C) 50 to 99F (10 to 37C) 1212 Hour 2424 Hour 0Off 9090 seconds 0Off 4040 seconds 0Unlocked 1Partial Lockout 1 2Partial Lockout 2 3Fully Locked 1Less Aggressive 2Standard 3More Aggressive

0660 0670

Heat Temperature Range Stops Cool Temperature Range Stops Clock Format Extended Fan-on time Heat Extended Fan-on time Cool Keypad Lockout
Only shown if system has heat stages. Only shown if system has cool stages.
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.) Only shown if system has heat stages. 0 disables ramped recovery (step setpoint change at period start time).

Temperature Control Heat

Recovery Heat Ramp Rate

0-20F/hour

TB8220U COMMERCIAL VISIONPRO PROGRAMMABLE THERMOSTAT Table 4. Installer Setup Menu. (Continued) Installer Setup Number 0690 Installer Setup Name Temperature Control Cool Default Setting 2
All Settings 1Less Aggressive 2Standard 3More Aggressive
Notes 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.) Only shown if system has cool stages. 0 disables ramped recovery (step setpoint change at period start time). This offset applies to both the control temperature and to the display temperature for indoor sensor (and remote indoor sensor).
Recovery Cool Ramp Rate Temperature Display Offset
-3 (-1.5) -3F (-1.5C) -2 (-1.0) -2F (-1.0C) -1 (-0.5) -1F (-0.5C) 0 (0.0)0F (0.0C) 1 (0.5)1F (0.5C) 2 (1.0) 2F (1.0C) 3 (1.5)3F (1.5C) 0No 1Yes

Restore Factory Defaults

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 Installer Test Fan Installer Test Heat 0 0Off 1Cool Stage 1 2Cool Stage 2 0Off 1Fan On 0Off 1Heat Stage 1 2Heat Stage 1 and 2 3Heat Stage 1,2 and 3 0Auxiliary Heat Off 1Auxiliary Heat On 0TOD/Economizer Off 1TOD/Economizer On

Test 2 Test 3

Test 4 Test 8
Installer Test Auxiliary Heat Installer Test TOD/Economizer
NOTE: Press the Done button to exit the Installer System Test.

OPERATION

System Settings
HeatThermostat controls the heating system. OffBoth heating and cooling systems are off. CoolThermostat controls the cooling system. AutoThermostat automatically changes between heat and cool operation, depending on indoor temperature.

Table 5. Energy Star Default Program Settings. Schedule Period Occ1 Unocc1 Occ2a Unocc2a Setpoints Time 8:00am 10:00pm Heat 70F (21C) 55F (10C) Cool 78F (25.5C) 85F (29.5C) Fan Setting Auto Auto

Fan Settings

Auto Fan runs only when heating/cooling system is on. OnFan runs continuously. Table 5 shows default program settings. See Owners Guide for complete instructions to change the program.
a The thermostat default setting is two period only. To use four periods, change the appropriate setup parameter.
Minimum-Off Timer Compressor Protection
The thermostat has an adjustable Minimum-Off Timer that can be set from zero to five minutes (Factory Settingfive 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.
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. Choose correct heat pump application in Installer Setup Number 0170. 2. Choose Outdoor Temperature Sensor for Control Option in Installer Setup Number 0340. 3. Choose Compressor Lockout Temperature in Installer Setup Number 0350. 4. Choose Auxiliary Lockout Temperature in Installer Setup Number 0360. NOTE: There is a 5F deadband between Compressor and Auxiliary Heat lockout temperatures.
Economizer/TOD Logic (Table 6)
Table 6. Operation of Terminal A. Effective Occupancy Occupied Call for Cool No Override Terminal A Economizer Energized Energized De-energized Energized TOD Energized De-energized De-energized Energized

Unoccupied Yes

Operation in Heat Mode
When the outdoor temperature is: 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.

OUTDOOR TEMPERATURE

Heat Pump Temperature Lockouts
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. 3. Choose appropriate Balance Point Temperature in Installer Setup Number 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.

COMPRESSOR ONLY

BOTH COMPRESSOR AND AUXILIARY HEAT
AUXILIARY LOCKOUT TEMPERATURE COMPRESSOR LOCKOUT TEMPERATURE

M19950

AUXILIARY ONLY
Fig. 27. Heat Pump Operation with Lockout Temperatures Set.
TROUBLESHOOTING (TABLE 7)
Table 7. Troubleshooting. Symptom Display does not come on. Possible Cause Thermostat is not being powered. Action Check for 24 Vac between C and Rc. Check that AAA batteries are installed correctly and are good. Check temperature setpoints. Check Installer Setup Numbers 0600 and 0610; modify as needed. Check Installer Setup Number 0670 to change keypad locked options. Wait up to five minutes for the system to respond. Set system Selection to correct position. Check Installer Setup Number 0170 and make sure correct System type is chosen. Check wiring. Check Installer Setup Number 0170 and make sure correct system type is chosen. Verify operation of equipment in System Test mode. 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. Set Changeover Valve (Installer Setup Number 0190) to match the changeover required by the installed heat pump. Set System Type (Installer Setup Number 0170) to match the installed heating and/or cooling equipment. Separate the shorted heating and cooling wires. 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.

Temperature settings do not change.
The upper or lower temperature limits were reached. The keypad is fully locked.
Heating or cooling does not come on.
Thermostat minimum off-time is activated. System selection not set to Heat or Cool. System type Selection is incorrect.
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. Heat does not turn on (Heat On is solid in the display). Heating equipment failure.
Heat pump puts out cool air in Changeover Valve (Installer Setup the heat mode and warm air in Number 0190) is not configured to the cool mode. match the changeover required by the installed heat pump. Both the heating and cooling equipment are running at the same time. The heating equipment is not a heat pump but the System Type (Installer Setup Number 0170) is set to Heat Pump. Heating and cooling wires are shorted together. Cooling does not turn on (Cool Cooling equipment failure. On is solid in the display).
TB8220U COMMERCIAL VISIONPRO PROGRAMMABLE THERMOSTAT Table 7. Troubleshooting. (Continued) Symptom Fan does not turn on in a call for heat (electric furnace). Heating equipment is running in the cool mode. Possible Cause Fan Control in Heating is set to Gas or Oil Furnace (Setting 0180). Heating equipment is not a heat pump but System Type (Installer Setup Number 0170) is set to Heat Pump. Action Set Fan Control in Heating to Electric Furnace (Setting 0180). Set System Type (Installer Setup Number 0170) to match the installed heating and/or cooling equipment. Set System Type (Installer Setup Number 0170) to match the installed heating and/or cooling equipment.
Heating equipment does not Heating equipment is not a heat pump turn off and heat temperature but System Type (Installer Setup setting is set below room Number 0170) is set to Heat Pump. temperature (Heat On is not in the display). Cannot set the system setting System Type (Installer Setup Number to Heat. 0170) is set to Cool Only.
Set System Type (Installer Setup Number 0170) to match the installed heating and/or cooling equipment. Set System Type (Installer Setup Number 0170) to match the installed heating and/or cooling equipment.

Cannot set the system setting System Type (Installer Setup Number to Cool. 0170) is set to Heat Only or Heat Only with Fan. 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 temperature setting above the room room temperature. temperature. 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.
Cool On is not in the display.

Wait is in the display.

SPECIFICATIONS
Electrical Ratings: Terminal W (Heating) Y (Cooling) G (Fan) Voltage (50/60 Hz) 20 - 30 Vac 20 - 30 Vac 20 - 30 Vac Running Current 0.02 - 1.0A 0.02 - 1.0A 0.02 - 0.60A 0.02 - 1.0A Thermostat Dimensions: 3-3/4 in. (95 mm) high x 6 in. (152 mm) wide x 1-3/8in. (35 mm) deep. Accessories: 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.
A (Economizer/TOD) 20 - 30 Vac Temperature Setting Range: Heating: 40F to 90F (4.5C to 32C). Cooling: 50F to 99F (10C to 37C). Operating Ambient Temperature: 0F to 120F (-18C to 49C). Shipping Temperature: -30F to 150F (-34.4C to 65.6C).

Perchlorate Material

This thermostat contains a Lithium battery which may contain Perchlorate material. The following statement is required: Perchlorate Materialspecial handling may apply. See www.dtsc.ca.gov/hazardouswaste/perchlorate
Operating Relative Humidity (Non-condensing): 5% to 90%.
Automation and Control Solutions Honeywell International Inc. 1985 Douglas Drive North Golden Valley, MN 55422 customer.honeywell.com
U.S. Registered Trademark 2008 Honeywell International Inc. 62-307003 M.S. Rev. 01-08
Honeywell Limited-Honeywell Limite 35 Dynamic Drive Toronto, Ontario M1V 4Z9

TB8220U Programmable Commercial Thermostat
FOR MULTISTAGE CONVENTIONAL AND HEAT PUMP SYSTEMS

GUIDE SPECIFICATION

GENERAL
A. B. Overview: Type of System: The contractor shall furnish, install, and place in operating condition an HVAC control system described herein. All units shall be located in accordance with the plans. System Requirements: a. Control up to 2 heating and 2 cooling stages for gas heat, electric heat, heat pump or compressor cooling. b. Provide minimum 2 year clock backup. c. Provide two Occupied and two Unoccupied periods per day. d. Offer automatic heat/cool changeover with 2F minimum deadband. e. Provide cumulative override capability for a 1 to 4 hour installer-adjustable period. f. Include a comfort adjust feature to modify setpoints for the override duration. g. Provide Proportional plus Integral (P + I) temperature control. h. Display room temperature in F or C. i. Use multiple remote sensors (optional). j. Use in conjunction with an economizer (optional). k. Provide four levels of keypad lockout - none, override and holiday, override only and complete. l. Provide Holiday Override, 1-365 days. m. Provide separate configurable recovery ramps for heating and cooling. n. Provide separate configurable cycle rates for heating and cooling response. o. Provide touch screen user interface. System Components: a. Seven day programmable thermostat with subbase. b. Wall mount temperature sensors (optional). c. Outdoor air sensor (optional). C. Codes and Standards: The system shall comply with applicable provisions of ASHRAE 90-75. These specifications are based on equipment from Honeywell to set a standard for design and quality. D. Wiring: All wiring shall meet National Electrical Codes and local electrical codes.

63-26113

TB8220U PROGRAMMABLE COMMERCIAL THERMOSTAT
Testing Guarantee Service:
Prior to installation, the contractor shall provide copies of submittals. The contractor is responsible for assuring that conduit and wire quantity, size, and type are suitable for the equipment supplied. Upon completion, the contractor shall conduct a total system test for the owner and engineer. All components, parts, and assemblies supplied by the manufacturer shall be guaranteed against defects in materials and workmanship for 5 years. Warranty service shall be performed by the contractor.

SEQUENCE OF OPERATIONS

The heating and cooling setpoints shall be individually adjustable for both the Occupied, Unoccupied and standby periods. The thermostat shall have a minimum deadband of 2F (no mechanical heating or cooling shall operate within this deadband). Space temperature deviation above the cooling setpoint or below the heating setpoint shall generate a demand signal to control the system as follows: A. Heating: The thermostat shall control the heating output based on the demand signal communicated from the thermostat program, taking into account both space temperature deviation (proportional gain), the duration of that temperature deviation (integral gain). The thermostat shall energize heating equipment when space temperature falls below heating setpoint. B. Cooling: The thermostat shall control the cooling output based on the demand signal communicated from the thermostat program, taking into account both space temperature deviation (proportional gain), the duration of that temperature deviation (integral gain). The thermostat shall energize cooling equipment when space temperature exceeds cooling setpoint. (Optional Remote Equipment) A solid state enthalpy changeover control shall determine the capability of the outdoor air to provide free cooling (optional). The system shall operate as follows: a. Free cooling available from Outdoor Air: On a call for cooling, the system shall enable the economizer to provide free cooling. If this does not meet the space demand, the system shall call for mechanical cooling to satisfy the programmed setpoint. b. Free Cooling Not Available From Outdoor Air: On a call for cooling, the system shall hold the economizer to minimum position and cooling shall be energized to satisfy the programmed setpoint. C. Economizer Interface: The auxiliary output of the subbase shall be connected to the economizer's power circuit or the Occupied/Unoccupied signal terminal. a. Occupied Period: The auxiliary output will provide 24 Vac, allowing the economizer to operate normally and be available for free cooling if outdoor conditions permit. b. Unoccupied Periods: The auxiliary output will cease, defeating either economizer operation or the minimum position. Heating Setback and Cooling Setup: Initiation of heating setback or cooling setup for each of 7 days shall be provided by a programmed time schedule manually entered into the thermostat. When all or a portion of a manually programmed schedule is unavailable, the thermostat shall control to the default program as shown in Table 1. Table 1. Default Program. Occupied Heating Setpoints Cooling Setpoints E. Setpoint Recovery from Unoccupied to Occupied: 70F (21C) 75F (24C) Unoccupied 55F (13C) 85F (29C)

The thermostat shall incorporate a ramping feature that gradually changes the space setpoints. During recovery operation, the setpoint changes at a rate in degrees per hour (defined in the Installer Setup Menu).

Fan Operation:

Fan operation shall be selectable as follows: a. On: Fan operates continuously in Occupied mode, and during a call for heat or cool in the Unoccupied mode. b. Auto: Fan is energized with calls for heating and cooling. a. Minimum On: Heat - 1 minute; Cool - 3 minutes. b. Minimum Off: Cool & Heat Pump - 1 minute. a. On loss of power, the thermostat shall maintain programmed times and temperatures for 10 years. b. Clock and day information shall be retained for a minimum of 2 years. a. The Holiday Override can be used when the thermostat is in Unoccupied mode. It shall switch to the Occupied mode for an installer-configured number of hours. b. The Temporary Unoccupied Override shall fix the schedule to operate in Unoccupied mode for a number of days (between 1 and 365) without changing programming saved in memory. c. Pressing Cancel or Run Schedule shall cancel the overrides and return to the program.
Minimum Stage Operation Time: Power Interruption:

Overrides:

THERMOSTAT MODELS AND FEATURES
Table 2. TB8220 Thermostat Features. Maximum Stagesa Model TB8220U

a All b When

Applications Conventional or Heat Pump 2b

Heat 2

Features Remote Outdoor or Indoor sensor
models are down-selectable and can be configured to control fewer stages than the maximum allowed. configured for heat pump operation, an additional stage of heat is available.

OPTIONS

A. B. C. D. Outdoor Air Sensors: C7089U. Temperature Sensors (Remote): T7770A, C7089U, C7189U, C7772. Economizer Logic Modules: Other Accessories: W6210, W6215, W7210, W7212, W7215, W7459. 209651A Vertical Mounting Hardware Wallplate Adapter (Trident white). TG511, TG512 Universal Versaguard Thermostat guards.
Automation and Control Solutions Honeywell International Inc. 1985 Douglas Drive North Golden Valley, MN 55422 customer.honeywell.com
U.S. Registered Trademark 2005 Honeywell International Inc. 63-26113 B.B. Rev. 05-05
Honeywell Limited-Honeywell Limite 35 Dynamic Drive Scarborough, Ontario M1V 4Z9