Honeywell TB7220U User manual

INSTALLATION INSTRUCTIONS
62-0221-05
TB7220U
CommercialPRO™
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.
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

TB7220U COMMERCIALPRO™ PROGRAMMABLE THERMOSTAT
62-0221—05 2
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.
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. 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.
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.
5 FEET
[1.5 METERS]
YES
NO
M22258
NO
NO
THERMOSTAT
WIRE HOLE
M22267
WALLPLATE
M22268
DRILLED
HOLES (2)
WALL
ANCHORS (2)
MOUNTING
SCREWS (2)
WALLPLATE
M23010
C
G
Y
O/B
RC
R
W1
Y2
A
S1
S2
C
G
Y
W
RC
R
W2
Y2
A
S1
S2
SCREW
TERMINALS
HEAT PUMP
CONVENTIONAL

TB7220U COMMERCIALPRO™ PROGRAMMABLE THERMOSTAT
3 62-0221—05
Fig. 5. Restrict wires to shaded area of wire hole.
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. Reference economizer literature for wiring
details. When set for economizer operation,
the A terminal provides the occupancy signal.
(Power indicates occupied.)
5. Sensor wires must have a cable separate
from the thermostat control cable.
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
cooling transformer must power the economizer.
— The A signal is powered from the RC terminal and
energizes the economizer to signal occupied status
and drive the damper to the set minimum position.
Table 3. Wiring Diagrams.
WALLPLATE
M22266
WALL OPENING
WIRE
SHADED AREA
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.
A (see Note 4) Economizer/Time-Of-Day (TOD) output—powered via RC terminal.
S1 (See Note 5) Optional outdoor or indoor remote sensor.
S2 (See Note 5) Optional outdoor or indoor remote sensor.
W1 Auxiliary Heat Relay Output (Head Pump Mode 2H/1C, 3H/2C)
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 TR21 Sensors — 17, 18, 19
Multiple C7189U Sensors — 20

TB7220U COMMERCIALPRO™ PROGRAMMABLE THERMOSTAT
62-0221—05 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
ECONOMIZER
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
A
S1
S2
2
3
L1
(HOT)
L2
1
24 VAC
M23011
COMPRESSOR CONTACTOR
M23012
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
ECONOMIZER
L1
(HOT)
L2
1
24 VAC
L1
(HOT)
L2
1
24 VAC
C
G
Y
W
RC
R
W2
Y2
A
S1
S2
2
M23013
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
ECONOMIZER
C
G
Y
W
RC
R
W2
Y2
A
S1
S2
2
M23014
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
HEAT RELAY
FAN RELAY
ECONOMIZER
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
A
S1
S2
2
M23015
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
ECONOMIZER
C
G
Y
W
RC
R
W2
Y2
A
S1
S2
2

TB7220U COMMERCIALPRO™ PROGRAMMABLE THERMOSTAT
5 62-0221—05
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).
M23016
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
ECONOMIZER
C
G
Y
W
RC
R
W2
Y2
A
S1
S2
2
M23017
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 ECONOMIZER
C
G
Y
W
RC
R
W2
Y2
A
S1
S2
2
COOLING
TRANSFORMER
HEATING
TRANSFORMER

TB7220U COMMERCIALPRO™ PROGRAMMABLE THERMOSTAT
62-0221—05 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
M23018
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
ECONOMIZER
C
G
Y
O/B
RC
R
W1
Y2
A
S1
S2
4
2
COMPRESSOR 1 COMPRESSOR 2
M23019
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
ECONOMIZER
C
G
Y
O/B
RC
R
W1
Y2
A
S1
S2
4
2
COMPRESSOR CONTACTOR
ECONOMIZER
M23020
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
A
S1
S2
4
2
COMPRESSOR 1
COMPRESSOR 2
M23021
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
ECONOMIZER
AUXILIARY HEAT RELAY
C
G
Y
O/B
RC
R
W1
Y2
A
S1
S2
4
2

TB7220U COMMERCIALPRO™ PROGRAMMABLE THERMOSTAT
7 62-0221—05
Sensor Wiring for Temperature
Averaging
Fig. 17. Wiring four T7770A1006 (20K ohm) Sensors.
Fig. 18. Wiring two TR21-A (10K ohm) Sensors to
provide a temperature averaging network.
Fig. 19. Wiring two TR21 (20K ohm) Sensors and one
TR21-A (10K ohm) sensor to provide a temperature
averaging network
Fig. 20. Wiring four C7189U (10K ohm) Sensors to
provide a temperature averaging network.
M27481
S1 S2
T T
SUBBASE
TR21
T T
TR21
T T
TR21
T T
TR21
M27482
S1 S2
SUBBASE
TR21-A
T4 T3
TR21-A
T4 T3
1
11
THE TR21-A IS A 10K OHM SENSOR.
M27483
T4 T3
TR21-A
1
1
THE TR21-A IS A 10K OHM SENSOR.
S1 S2
TT
SUBBASE
TR21
TT
TR21
M23027
WIRES MUST HAVE A CABLE SEPARATE
FROM THE THERMOSTAT CABLE.
1
1
C7189 C7189
C7189 C7189
S1 S2
SUBBASE

TB7220U COMMERCIALPRO™ PROGRAMMABLE THERMOSTAT
62-0221—05 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 COMMERCIALPRO™ PROGRAMMABLE THERMOSTAT
9 62-0221—05
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
the Installer Setup Numbers, Settings, and Tests section.
Fig. 24. Setting calendar and time after initial powerup.
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 BUTTON
GOES BACK TO
LAST SETTING
NEXT BUTTON
ADVANCE TO NEXT SETTING
DONE BUTTON
ADVANCES TO TIME SETTING
SCREEN AND HOME SCREEN
UP AND DOWN BUTTONS
CHANGES MONTH, DAY,
YEAR AND TIME
DeSelect Day
System & Fan
FanUseEdit
Schedule
View
Clock & More
Tue
Done
PM

TB7220U COMMERCIALPRO™ PROGRAMMABLE THERMOSTAT
62-0221—05 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.
Installer System Tests
Use the Installer System Test section to test the heating,
cooling and fan. 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
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.
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 (Month Dependent)
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 (Aux. Heat)
8—2H/2C Conv
9—2H/1C Conv
10—1H/2C Conv
11—2H/2C HP
12—3H/2C HP (Aux.
Heat)
To use the Emergency Heat button, select setting
#7 or #12. See Fig. 16 or 17 for auxiliary heat
wiring.
0175 TOD/Economizer
output (terminal A)
0 0—Unused
1—TOD
2—Economizer
Economizer energizes A during a call for cool.
TOD energizes A during Occupied period, and de-
energizes A during Unoccupied.
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 (ISU 0170) and fan capability 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).
Pre-occupancy purge enabled by nonzero duration
(and sends economizer to minimum position).
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).