Honeywell Home T4 Pro User manual

Package Includes:
• T4 Pro Thermostat
• UWP™ Mounting System
• Decorative Cover Plate
• Screws and Anchors
• 2 AA Batteries
• Thermostat Literature
T4 Pro
Programmable Thermostat
Product Data
TH4110U2005,
TH4210U2002
M37844
Optional Cover Plate installation
NOTE: If Optional Cover Plate is not
required, see “UWP Mounting System
installation” on next page.
Use the Optional Cover Plate when
you need to cover paint gap from old
thermostat.
There are different cover plates
depending on when the thermostat was
manufactured.
For the square cover plate:
1. Separate the Cover Plate from
Mounting Plate.
2. Mount the Mounting Plate on to the
wall using any of the 8 screw holes.
Insert and tighten mounting screws
supplied with Cover Plate Kit. Do not
overtighten. See Figure 2. Make sure
the Mounting Plate is level.
3. Attach the UWP by hanging it on the
top hook of the Mounting Plate and
then snapping the bottom of the UWP
in place. See Figure 3.
4. Snap the Cover Plate onto the
Mounting Plate. See Figure 4.
Use supplied
screws and
wall anchors
4
3
2
1
MCR38416

2
UWP Mounting System installation
Use 3x supplied
screws (#8 11/2
for red anchors and
#6 11/2 for yellow
anchors)
1. Before starting, turn the power off
at the breaker box or switch. Open
package to find the UWP. See Figure 1.
2. Position the UWP on wall. Level and
mark hole positions. See Figure 2.
Drill holes at marked positions, and
then lightly tap supplied wall anchors
into the wall using a hammer.
‒If your box contains red anchors,
drill 7/32” holes.
‒If your box contains yellow anchors,
drill 3/16” holes.
3. Pull the door open and insert the wires
through wiring hole of the UWP. See
Figure 3.
4. Place the UWP over the wall anchors.
Insert and tighten mounting screws
supplied with the UWP. Do not
overtighten. Tighten until the UWP
no longer moves. Close the door. See
Figure 4.
For the rectangular cover plate:
1. Mount the Cover Plate on the wall using
any of the 6 screw holes. Insert and tighten
the mounting screws supplied with the
Cover Plate. Do not overtighten. See Figure
1. Make sure the Cover Plate is level. Attach
the UWP by hanging it on the top hook
of the Cover Plate and then snapping the
bottom of the UWP in place. See Figure 2.
2. If there are no existing wall anchors:
a. Position the Cover Plate on wall. Level
and mark hole positions. See Figure 1.
b. Drill holes at marked positions, and then
lightly tap supplied wall anchors into the
wall using a hammer.
•If your box contains red anchors, drill
7/32” (5.6 mm) holes.
•If your box contains yellow anchors,
drill 3/16” (4.8 mm) holes.
•Use 2x supplied screws (#8 11/2”
(38 mm) for red anchors and #6
11/2” (38 mm) for yellow anchors).
2
1
MCR38417
4
12
3
MCR38409

3
Power options
UWP Wiring terminal designations
SNot used for T4
thermostat.
L/A
- A Not used for T4 thermostat.
SO/B Changeover valve
YCompressor contactor
(stage 1)
AUX -
W2
Auxiliary heat (TH4210U
only)
Y2 Not used for T4
thermostat. EEmergency heat (TH4210U only)
GFan WHeat (stage 1)
C
24VAC common. For 2
transformer systems,
use common wire from
cooling transformer.
KConnect to K on C-wire
adaptor**
UNot used for T4
thermostat.
R24VAC power from heating
transformer*
URc 24VAC power from cooling
transformer*
Note: Not all
terminals may be
used, depending
on the system
type that is being
wired. The most
commonly used
terminals are
shaded.
* Terminal can be jumped using Slider Tab. See “Setting Slider Tabs” above.
** The THP9045A C-wire adaptor is used on heat/cool systems when you only have four wires at the thermostat,
and you need a fifth wire for a common wire. Use the K terminal in place of the Y and G terminals on
conventional or heat pump systems to provide control of the fan and the compressor through a single wire—the
unused wire then becomes your common wire. See THP9045 instructions for more information.
MCR36094
S
S
Y2
U
U
G
C
Y
A
Rc
W
K
W2
R
L/A
O/B
AUX
E
MCR36776
MCR36114
Set R Slider Tab.
• Use built-in jumper (R Slider Tab)
to differentiate between one or two
transformer systems.
• If there is only one R wire, and it is
connected to the R, Rc, or RH terminal, set
the slider to the up position (1 wire).
• If there is one wire connected to the R
terminal and one wire connected to the Rc
terminal, set the slider to the down position
(2 wires).
NOTE: Slider Tabs for U terminals should be
left in place for T4 Pro models.
Setting Slider Tabs
Insert Rand Cwires into
designated terminals
for primary AC power (C
terminal is optional if
batteries are installed,
but it is recommended).
Remove wires by
depressing the terminal
tabs.
Insert AA
batteries for
primary or
backup power.
R/Rc Slider Tab
(built-in jumper)
UWP Mounting System
MCR36115

4
Wiring diagrams
W R
G
C
S
S
Y
Y2
G
C
U
U
A
W2
W
K
Rc
R
L/A
E
AUX
M38990
1COMMON OPTIONAL.
G USED FOR INDEPENDENT FAN CONTROL ONLY. MOST HEA
T
ONLY, GAS OR OIL FORCED AIR SYSTEMS DO NOT USE A FAN
(G) WIRE.
2
12
FURNACE
R/Rc
SWITCH UP
O/B
COMPATIBLE MODELS:
TH4110U2005
TH4210U2002
M38991
COMPATIBLE MODELS:
TH4110U2005
TH4210U2002
1COMMON OPTIONAL.
AIR-HANDLER
Y R
G
C
S
S
Y
Y2
G
C
U
U
A
W2
W
K
Rc
R
L/A
E
AUX
1
O/B
R/Rc
SWITCH UP
M38992
COMPATIBLE MODELS:
TH4110U2005
TH4210U2002
1COMMON OPTIONAL.
W R
G
C
S
S
Y
Y2
G
C
U
U
A
W2
W
K
Rc
R
L/A
E
AUX
FURNACE
O/B
RW
Y
G
C
1
1
R/Rc
SWITCH UP
M38993
S
S
Y
Y2
G
C
U
U
A
W2
W
K
Rc
R
L/A
E
AUX
OIL FURNACE
O/B
RW
Y
G
CR
1COMMON OPTIONAL.
1
AIR HANDLER
COMPATIBLE MODELS:
TH4110U2005
TH4210U2002
R/Rc SWITCH
DOWN
1 Stage Heat Only: Gas or Oil Furnace 1 Stage Cool Only
1H/1C: Gas Furnace +
AirConditioning 2 Transformer System, 1H/1C: Oil Furnace + AirConditioning

5
M38994
S
S
Y
Y2
G
C
U
U
A
W2
W
K
Rc
R
L/A
E
AUX
BOILER
O/B
RW
Y
G
CR
1COMMON OPTIONAL.
1
AIR HANDLER
COMPATIBLE MODELS:
TH4110U2005
TH4210U2002
R/Rc SWITCH
DOWN
M38995
S
S
Y
Y2
G
C
U
U
A
W2
W
K
Rc
R
L/A
E
AUX
BOILER
O/B
R (T)W (T)
COMPATIBLE MODELS:
TH4110U2005
TH4210U2002
R/Rc SWITCH
UP
M38996
S
S
Y
Y2
G
C
U
U
A
W2
W
K
Rc
R
L/A
E
AUX
BOILER
R/Rc SWITCH
UP
O/B
R (T)
W (T)
COMPATIBLE MODELS:
TH4110U2005
TH4210U2002
1COMMON OPTIONAL TO THERMOSTAT.
C
V8043
ZONE VALVES
1
TH
TR
TRANSFORME
R
R
24 VOLTS
END SWITCH
M38997
S
S
Y
Y2
G
C
U
U
A
W2
W
K
Rc
R
L/A
E
AUX
R/Rc SWITCH
UP
O/B
COMPATIBLE MODELS:
TH4110U2005
TH4210U2002
1COMMON OPTIONAL TO THERMOSTAT.
THERMOSTAT MUST BE CONFIGURED FOR RADIANT HEAT
WITH 0 COOL STAGES.
C
POWER OPEN/
POWER CLOSED
ZONE VALVE
1
5
TRANSFORMER
R
2
L2
L1
120 VOLT
SUPPLY
2
63
41
TO AUXILIARY
CIRCUIT FOR
OPERATING BOILER.
(SEE VALVE
INSTUCTIONS)
2
2 Transformer System, Hot Water Heat
with AirConditioning (or Hot Water
Coil)
Hot Water Boiler, Heat Only
Hot Water Heat with Power Open Zone
Valve Hot Water Heat with Power Open/ Power Closed, Series 20 Zone Valve

6
M38998
COMPATIBLE MODELS:
TH4110U2005
TH4210U2002
1COMMON OPTIONAL.
L CONNECTION (HEAT PUMP FAULT) NOT AVAILABLE ON T1 AND T4
MODELS. THE TH6210U2001 CAN BE USED IF FAULT INDICATION ON
THERMOSTAT IS NEEDED.
SOME HEAT PUMPS USE B RATHER THAN O FOR REVERSING VAL
VE.
DO NOT CONNECT ANY WIRE TO W FOR HEAT PUMP APPLICATIONS!
THIS CAN CAUSE HEAT TO RUN CONTINUOUSLY.
S
S
Y
Y2
G
C
U
U
A
W2
W
K
Rc
R
L/A
E
AUX
HEAT PUMP/
AIR-HANDLER
O/B
1
1
R
O
Y
G
CL
2
3
4
1
21
3
4
R/Rc
SWITCH UP
M39002
COMPATIBLE MODELS:
TH4210U2002
1
COMMON OPTIONAL.
L CONNECTION (HEATPUMP FAULT) NOT AV
AILABLE ON TH4210U2002
MODEL. THE TH6210U2001 CAN BE USED IF FAULT INDICATION ON
THERMOSTAT IS NEEDED.
SOME HEAT PUMPS USE B RATHER THAN O FOR REVERSING VALVE.
DIFFERENT HEAT PUMP MODELS LABEL THE AUXILIARY HEAT
TERMINAL DIFFERENTLY THAN SHOWN. CONSULT HEAT PUMP
WIRING GUIDE.
IF AUX HEAT LOCKOUT ON HIGH OUTDOOR TEMPERATURE IS
REQUIRED, USE TH6220U2000 THERMOSTAT AND C7089U1006
OUTDOOR SENSOR. THE TH4210U2002 CANNOT DO THIS.
MOST HEAT PUMPS SHARE THE SAME SET OF HEAT STRIPS FOR AUX
AND EM HEAT. IN THOSE CASES E ISN’T USED. IF YOU HAVE SEPARATE
HEAT SOURCES FOR THE AUX AND EM HEAT, THE TH4210U2002 CANNOT
BE SET TO DO THIS. THE TH6320U2008 MODEL CAN BE CONFIGURED
FOR SEPARATE AUX AND E. IF THIS IS DONE, WIRE ONE SET OF STRIPS
TO E TO BE ENERGIZED IN EM HEAT AND A DIFFERENT SET OF STRIPS
TO AUX TO BE ENERGIZED IN AUX HEAT.
DO NOT CONNECT ANY WIRE TO W FOR HEAT PUMP
APPLICATIONS! THIS CAN CAUSE HEAT TO RUN CONTINUOUSLY.
S
S
Y
Y2
G
C
U
U
A
W2
W
K
Rc
R
L/A
E
AUX
HEAT PUMP/
AIR-HANDLER
R/Rc
SWITCH UP
O/B
1
RAUX
L
G
CO
Y
2
3
4
5
6
7
234
6
7
5
1H/1C: Heat Pump without Aux Heat 2H/1C: Heat Pump with Electric Aux
Heat

7
Fan operation settings
1 Press the Fan button to cycle to the next
available Fan mode.
2 Cycle through the modes until the required
Fan mode is displayed and leave it to
activate.
NOTE: Available Fan modes vary with system
settings.
Fan modes:
‒Auto: Fan runs only when the heating or
cooling system is on.
‒On: Fan is always on.
Thermostat mounting
1. Push excess wire back into the wall
opening.
2. Close the UWP door. It should remain
closed without bulging.
3. Align the UWP with the thermostat, and
push gently until the thermostat snaps in
place.
4. Turn the power on at the breaker box or
switch.
System operation settings
1 Press the Mode button to cycle to the next
available System mode.
2 Cycle through the modes until the required
System mode is displayed and leave it to
activate.
NOTE: Available System modes vary by model
and system settings.
System modes:
‒Auto: Thermostat selects heating or cooling as
needed.
‒Heat: Thermostat controls only the heating
system.
‒Cool: Thermostat controls only the cooling
system.
‒Em Heat (TH4210U only) (only for heat
pumps with auxiliary heat): Thermostat
controls Auxiliary Heat. Compressor is not
used.
‒Off: Heating and cooling system is off. Fan will
still operate if fan is set to On.
MCR36116
MCR36517A
MCR36518A

8
Set the time and date
Time
1 Press Menu, and then press to go to TIME.
Press Select.
2 Press or to choose between 12 or 24 hour.
Press Select.
3 Use or to adjust the hour. Press Select.
4 Use or to adjust the minutes. Press Select
to exit Time menu.
Date
1 If previously setting time, continue to Step
2. If at the Home screen, press Menu on your
thermostat.
2 Press or to go to DATE. Press Select.
3 Use or to adjust year. Press Select.
4 Use the or to adjust month. Press Select.
5 Use the or to adjust Date. Press Select to
save and exit Date menu.
MCR36519A
MCR36523
Program Schedule
You can program four time periods each day, with different settings for weekdays
and weekends. We recommend the pre-sets (shown in the table below), since they
can reduce your heating/cooling expenses.
Wake - Set to the time you wake up and the
temperature you want during the morning, until
you leave for the day.
Away - Set to the time you leave home and the
temperature you want while you are away (usually
an energy-saving level).
Home - Set to the time you return home and the
temperature you want during the evening, until
bedtime.
Sleep - Set to the time you go to bed and the
temperature you want overnight (usually an
energy-saving level).
NOTE: To temporarily or permanently override any of the above program
schedules, see page 4.
Heat Cool
Wake
(6:00 am)70 °78 °
Away
(8:00 am)62 °85 °
Home
(6:00 pm)70 °78 °
Sleep
(10:00
pm)62 °82 °

9
To adjust program schedules
1 Press Menu on your thermostat.
2 PROG is displayed. Press Select. Then ON
is displayed. (If you do not want to use a
schedule, press or to display OFF.
Press Select.) Press Select.
3 Press or to select day or set of days to
edit. Press Select.
4 Press or to select a schedule period to
edit (Wake, Away, Home, and Sleep). Press
Select.
5 ON is displayed. Press Select to keep the
schedule period on. Or press and then Select to turn off the schedule period.
6 Time starts blinking. Press or to adjust the schedule period start time.
Press Select.
7 Temperature starts blinking. Press or to adjust the “Heat” setpoint
temperature. Press Select. Press or to adjust the “Cool” temperature
setpoint. Press Select.
8 Repeat steps 4 through 7 for the remaining schedule periods.
9 Press Home when you’re finished to save and return to the home screen.
10 Schedule can be adjusted and turned ON or OFF by returning to Menu and
following the steps provided above.
MCR36519A
Program schedule override (permanent)
Program schedule override (temporary)
1 Press or to adjust the temperature.
2 Once at the desired setpoint temperature,
no further action is needed. The new
setpoint temperature will be held until the
next scheduled time period begins. For more
information on schedule time periods, see
“Program Schedule” on page 3.
3 To cancel the Temporary Hold, Press or
and then press Cancel.
1 Press or to adjust the temperature.
2 TEMPORARY HOLD is displayed and
the setpoint temperature flashes. While
it’s flashing, press Hold (Mode) button to
change to Permanent Hold.
3 To cancel the Permanent Hold, press or
and then press Cancel.
MCR36525
A
MCR36524A

10
MCR36526A
Adaptive Intelligent Recovery
Over time, the T4 Pro Thermostat “learns” how long it takes your system to reach
the temperature you want. It turns on the heating or cooling system earlier to
make sure you’re comfortable at the time you expect.
Damage can occur if the compressor is
restarted too soon after shutdown. This
feature forces the compressor to wait for a few
minutes before restarting.
During the wait time, the display will flash
the message Cool On (or Heat On if you have
a heat pump). When the safe wait time has
elapsed, the message stops flashing and the
compressor turns on.
Built-in compressor protection
Message flashes until safe
restart time has elapsed.
Adjusting keypad lockout
1 Press Menu on the thermostat.
2 Press or to go to LOCK. Press Select.
3 Press or to go to OFF, PART, or ON, and then press Select.
OFF: Unlocked, and full access allowed.
PART: Partial lockout, allowing only the temperature to be changed.
ON: No access allowed.
4 To unlock the keypad, press the CENTER button and then enter the password
“1234”. To enter the password, press or to change the first digit of the
number. Then press Select. Repeat this process to enter the second through
fourth digits of the number. Once all four numbers have been entered, press
Select again.
5 This will unlock the keypad.
6 If the code is incorrect, the screen will flash the lines "--".
7 Press Back to go back a step to enter the correct number and press Select.
NOTE: On some models keypad lockout is not available under menu if the
installer did not enable the lockout during the installer setup.
Adjusting idle backlight display brightness
1 Press Menu on the thermostat.
2 Press or to go to LITE. Press Select.
3 Current brightness setting is displayed (15).
4 Press or to adjust backlight brightness.
5 Press Select to save and exit LITE menu.
NOTE: Backlight is only displayed if the C (common) wire is connected.