Honeywell T6 Pro Hydronic User manual

Package Includes:
• T6 Pro Hydronic Programmable
Thermostat
• Floor sensor (model AQ12C20)
• UWP™ Mounting System
• Honeywell Standard Installation Adapter
(J-box adapter)
• Honeywell Decorative Cover Plate –
Small; size 449/64 in x 449/64 in x
11/32 in (121 mm x 121 mm x 9 mm)
• Screws and anchors
• 2 AA Batteries
• Installation Instructions and User Guide
T6 Pro Hydronic
Programmable Thermostat
Installation Instructions
Welcome!
T6 Pro Hydronic Programmable Thermostat can be used
to control the ambient air temperature or floor temperature
or both. You can choose among the following temperature
control modes.
A mode: Controls and displays the ambient air temperature
only.
F mode: Controls and displays the floor temperature only
using an external floor temperature sensor. This control
mode is suitable for areas such as bathrooms where floor
temperature could be scheduled to be warm only during
occupied, morning and evening periods.
• Floor temperature is indicated by “FLR” above the actual
floor temperature.
• Actual ambient air temperature could also be displayed in
the Thermostat MENU/TEMP.
AF mode: Controls and displays the ambient air temperature
as well as maintains the floor temperature within desired
floor temperature limits using an external floor temperature
sensor. Setting the minimum and maximum floor
temperature limits is a way to enhance
comfort and to protect the floor covering at
the same time.
• Actual floor temperature could also be
displayed in the Thermostat MENU/
TEMP.
NOTE: To set the thermostat temperature
control mode, go to “Installer setup (ISU)”
on page 7.
A, AF mode; main screen
F mode; main screen
Temperatures menu
Back

2
UWP Mounting System installation
Use 3x supplied
screws #8 11/2”
5. Before starting, turn the power off
at the breaker box or switch. Open
package to find the UWP. See Figure 5.
6. Position the UWP on wall. Level and
mark hole positions. See Figure 6.
Drill holes at marked positions, and
then lightly tap supplied wall anchors
into the wall using a hammer.
‒Drill 7/32” holes for drywall.
7. Pull the door open and insert the wires
through wiring hole of the UWP. See
Figure 7.
8. 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 8.
8
5
6
7
Optional Cover Plate installation
NOTE: If Optional Cover Plate is not
required, see “UWP Mounting System
installation” below.
Use the Optional Cover Plate when:
• Mounting the thermostat to an
electrical junction box
• Or when you need to cover paint gap
from old thermostat.
1. Separate the Junction Box Adapter
from the Cover Plate. See Figure 1.
2. Mount the Junction Box Adapter to
the wall or an electrical box using
any of the eight screw holes. Insert
and tighten mounting screws
supplied with Cover Plate Kit. Do not
overtighten. See Figure 2. Make sure
the Adapter Plate is level.
3. Attach the UWP by hanging it on the
top hook of the Junction Box Adapter
and then snapping the bottom of the
UWP in place. See Figure 3.
4. Snap the Cover Plate onto the
Junction Box Adapter. See Figure 4.
Use 2x
supplied
screws #6
5/8”
4
3
2
1

3
S
S
Y2
U
U
G
C
Y
A
Rc
W
K
W2
R
L/A
O/B
AUX
E
Power options
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. Match the polarity of the batteries
with the + / – marks inside the battery
compartment.
Set R Slider Tab.
• Boiler, hot water valve circuit, or hot water
relay panel wires to Rand W. If the same
transformer is providing common to power
the thermostat, wire the transformer
common to Cand leave the R slider tab in
the up position (1 wire). If a transformer
that is not powering the heating equipment
is used to power the thermostat display,
set the R slider tab to the down position
(2 wires). Wire the heat circuit to Rand W,
then wire the separate transformer to Rc
and C.
NOTE: Slider Tabs for U terminals should be
left in place for this thermostat model.
Setting Slider Tabs
R/Rc slider tab
UWP Mounting System

4
Wiring terminal designations
SInput for auxiliary wired floor
or indoor sensors
L/A
- A Unused
SO/B Unused
YUnused AUX
- W2 Unused
Y2 Unused EUnused
GUnused WHeat relay (stage 1)
C
24 VAC common. If a second
transformer, separate
from the one powering the
heating equipment, is used,
use the common from that
transformer.
KUnused
U
Unused
R24 VAC power from heating
transformer*
URc
24 VAC power is a
transformer other than a
heating transformer used to
power display (optional)
* Terminal can be jumped using Slider Tab. See “Setting Slider Tabs” on
page 3.
Heat-only System (with floor sensor)
R Power [1]
Rc [R+Rc joined by Slider Tab] [2]
C 24 VAC common [3]
W Heat relay
S,S Input for wired floor sensor
Heat-only System (power open zone
valve)
R Power [1]
Rc [R+Rc joined by Slider Tab] [2]
C 24 VAC common [3]
W Valve
Heat-only System (hot water relay
panel with floor sensor)
R Power [1]
Rc [R+Rc joined by Slider Tab] [2]
C 24 VAC common [3]
W to W on zone of relay panel
S,S Input for wired floor sensor
Heat-only System (boiler with floor
sensor)
R Power [1]
Rc [R+Rc joined by Slider Tab] [2]
C 24 VAC common [3]
W to W on boiler
S,S Input for wired floor sensor
Wiring conventional systems
NOTES
Wire specifications: Use 18 to 22-gauge thermostat wire. Shielded cable is not
required.
[1] Power supply. Provide disconnect means and overload protection as required.
[2] Move RSlider Tab on UWP to the R (1 wire) setting. For more information,
see “Setting Slider Tabs” on page 3.
[3] Optional 24 VAC common connection.

5
Floor temperature sensor installation
T6 Pro Hydronic thermostat is compatible
with the following 10K ohm Honeywell floor
temperature sensors: AQ12C20, AC11201,
AC13001.
The floor temperature sensor needs to be
installed mid way between the piping to
ensure proper temperature reading (not over
or right next to piping). Example: For a 12”
pipe spacing install the sensor 6” away from
the piping and ensure the sensor is vertically
centered.
We recommend installing the floor
temperature sensor inside of min. 0.5’’
PEX pipe. This simplifies future sensor
replacement, if required.
In a small room, position the sensor in the
center of the floor. In larger rooms, ensure the
sensor is at least 7 feet from the wall.
Recommended floor temperatures
settings
Recommended maximum floor temperature
is 90 °F (32 °C) for most floor covering types
except wood. Suggested maximum floor
temperature for wood floor is 85 °F (29.5 °C).
Freeze protection temperature for garages and
basements is suggested to be set between
4145 °F (57.2 °C).
Floor sensor conduit position in a slab
FLOOR SENSOR
CONDUIT
HEATING PIPE
S
SLAB

6
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.
Set the time and date
Time
1 Press Menu on your thermostat.
2 Press or to go to TIME. Press Select.
3 Press or to choose between 12 or 24 hour.
Press Select.
4 Use or to adjust the hour. Press Select.
5 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 day. Press Select to
save and exit Date menu.
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.
Available System modes:
‒Heat
‒Off

7
1 Press and hold CENTER and buttons for
approximately 3 seconds to enter advanced
menu.
2 Press Select to enter ISU.
3 Press Select to cycle through menu setup
options.
4 Press or to change values or select
from available options.
5 Press Select and confirm your settings or
press Back to ignore changes and return
to ISU menu screen to continue editing
another setup option.
6 To finish setup process and save your
setting, press Home and return to Home
screen.
NOTE: A complete list of all setup (ISU)
parameters and options starts below and
continues through page 9.
Installer setup (ISU)
Advanced setup options (ISU)
NOTE: Depending on system settings, not all options may be available.
# ISU ISU Name ISU Options (factory defaults
in bold)
Notes
120 Scheduling Options 0 = Non-programmable
2 = 52 Programmable
3 = 511 Programmable
4 = 7Day Programmable
You can change default 511 schedule here. To edit
periods, temperature setpoints during days, go to
MENU/PROG.
125 Temperature
Indication Scale
0 = Fahrenheit
1 = Celsius
129 Wired Floor
Temperature Sensor
0 = None
1 = Wired
Floor Temperature Sensor needs to be wired to S
terminal and configured if you want thermostat to
operate either in AF or F mode (ISU 299). If Floor
Temperature Sensor is wired to S terminal and
configured, actual floor temperature can be displayed
in thermostat Menu/Temp.
205 Heating Equipment
Type
9 = Hot Water Radiant Heat
10 = Hot Water Radiant Floor
Heat
12 = Steam
This ISU configuration helps to optimize control
algoritms and to force optimal default cycle rates for
controlled heating euipment.
299 Temperature Control
Mode
1 = Air and Floor (AF Mode)
2 = Air Only, (A Mode)
3 = Floor Only (F Mode)
This ISU is only displayed if ISU 129 is configured for
1 (wired floor sensor) and ISU 205 is set to 10 (Hot
Water Radiant Floor Heat). Default Mode is AF.
AF Mode: Controls and displays the ambient air
temperature. Maintains the floor temperature within
desired limits using an external floor temperature
sensor.
A Mode: Controls and displays the ambient air
temperature only.
F Mode: Controls and displays the floor temperature
only using an external floor temperature sensor.

8
Advanced setup options (ISU)
# ISU ISU Name ISU Options (factory defaults
in bold)
Notes
370 Heating Cycle Rate
(Cycles per hour)
1 - 12 This ISU allows you to limit the maximum number
of times the system can cycle in a 1 hour period
measured at a 50% load. For example, when set to 3
CPH, at a 50% load, the most the system will cycle
is 3 times per hour (10 minutes on, 10 minutes off).
The system cycles less often when load conditions
are less than or greater than a 50% load. The
recommended (default) cycle rate settings are below
for each heating equipment type selected:
Hot Water Radiant Heat = 3 CPH; Hot Water
Radiant Floor Heat in A or AF mode = 1CPH; Hot
Water Radiant Floor Heat in F mode = 3CPH; Steam
= 1CPH
388 Minimum On Time
(Boiler short cycling
protection)
0 = Off
2 = 2min
5 = 5min
15 = 15min
This ISU allows you to set minimum on time to protect
equipment from short cycling.
425 Adaptive Intelligent
Recovery
0 = No
1 = Yes
Adaptive Intelligent Recovery (AIR) is a comfort
setting. Heating equipment will turn on earlier,
ensuring the indoor temperature will match the
setpoint at the scheduled time.
431 Maximum Heat
Setpoint
A/AF mode:
40 °F to 90 °F (90 °F);
4.5 °C to 32.0 °C (32.0 °C)
F mode:
40 °F to 99 °F (85 °F);
4.5 °C to 38.0 °C (29.5 °C)
The user cannot set the heating temperature above
this level. Air heating temperature in A/AF mode,
Floor heating temperature in F mode.
432 Minimum Heat
Setpoint
A/AF mode:
40 °F to 90 °F (50 °F);
4.5 °C to 32.0 °C (10 °C)
F mode:
40 °F to 99 °F (50 °F);
4.5 °C to 38.0 °C (10 °C)
The user cannot set the heating temperature below
this level. Air heating temperature in A/AF mode.
Floor heating temperature in F mode.
435 Keypad Lockout 0 = Off
1 = Partial
2 = Full
Unlocked: User has access to all thermostat settings.
Partially Locked: User can modify only temperature
settings.
Fully Locked: User cannot modify any settings.
Screen will be locked by default "1234" factory code
and cannot be changed.
500 Wired Indoor Air
Temperature Sensor
0 = No
1 = Yes
This ISU is only displayed if no Wired Floor
Temperature Sensor (ISU 129) is configured.
515 Wired Indoor Air
Temperature Sensor
Type
0 = 10k
1 = 20k
Choose resistance type of Wired Indoor Air
Temperature Sensor. This ISU is only displayed if
Wired Indoor Air Temperature Sensor (ISU 500) is
configured.
520 Which Indoor Air
Temperature Sensor
will be used for
TEMPERATURE
Control? (Multiple
Sensors are
Averaged)
1 = Thermostat Only
2 = Wired Only
3 = Average
You can choose what Air temperature source to
be used or you can ask thermostat to use both
thermostat and remote wired sensors for higher
accuracy of measurement. This ISU is only displayed
if Wired Indoor Air Temperature Sensor (ISU 500) is
configured.

9
Advanced setup options (ISU)
# ISU ISU Name ISU Options (factory defaults
in bold)
Notes
575 Minimum Floor
Temperature Limit
40 °F to 89 °F* (72 °F);
4.5 °C to 31.5 °C* (22.2 °C)
*If the floor temperature is below that limit, the
heating will be activated regardless of the ambient Air
temperature. This ISU is only displayed if Temperature
Control Mode (ISU 299) is set to AF mode. The
minimum floor temp limit setting cannot be set higher
than 10 degrees below the maximum floor temp limit
setting.
576 Maximum Floor
Temperature Limit
50 °F* to 99 °F (85 °F);
10 °C* to 38 °C (29.5 °C)
*If the floor temperature is above that limit, the
heating will turn off regardless of the ambient Air
temperature. This ISU is only displayed if Temperature
Control Mode (ISU 299) is set to AF mode. The
maximum floor temp limit setting cannot be set lower
than 10 degrees above the minimum floor temp limit
setting.
577 Floor Economy
Mode
0 = Off
1 = On
If enabled, Low Floor Temperature Limit (ISU 575)
will be disabled during Away and Sleep period. This
ISU is only displayed if Temperature Control Mode
(ISU 299) is set to AF mode and (ISU 120) is set to
programmable.
578 Freeze protection
temperature
A mode:
40 °F to 50 °F (40 °F);
4.5 °C to 10.0 °C (4.5 °C)
A/AF mode:
40 °F (4.5 °C) to Min. Floor Temp.
Limit
F mode:
40 °F (4.5 °C) to Min. Heat Temp.
Setpoint
The thermostat operates the heat whenever the room
or floor temperature falls below that limit, even when
the system mode is set to Off. Default setting is 40 °F
(4.5 °C) for all A/AF/F regulation modes.
Freeze protection temperature cannot be set above the
minimum floor temperature limit in AF mode or above the
minimum heat temperature setpoint in F mode.
1400 Backlighting 0 - On Demand
1 - Continuous
Common wire needed for Continuous Backlight
1401 Inactive Backlight
Brightness
1 - 5This ISU is only displayed if Continuous Backlight
selected.
1=minimum, 5=maximum inactive backlight
brightness
1410 Clock Format 12 / 24
1415 Daylight Saving Time 0 = Off
1 = On
Set to Off in areas that do not follow Daylight Saving
Time.
1420 Temperature Display
Offset
3 - 3 °F (0)
1.5 to 1.5 °C (0)
0°F - No difference in displayed temperature and the
actual room temperature. The thermostat can display
up to 3 °F (1.5 C) lower or higher than the actual
measured temperature.

10
Installer system test
To perform a System Test:
1 Press and hold CENTER and buttons for
approximately 3 seconds to enter advanced
menu.
2 Use to go to TEST. Press Select to enter
System Test.
3 Use to change between Heat or Ver
(thermostat version information). Press Select.
4 Press to turn heat on. Press to turn heat
off.
5 Use the Home button to exit the System Test.
Number Alert/Reminder Definition
170 Internal Memory Error The memory of the thermostat has encountered an error. Please contact dealer for
assistance.
171 Set the Date and Time Set the date and time on your thermostat. The date and time are required for certain
features to operate, like the program schedule.
173 Thermostat Temperature
Sensor Error
The sensor of the thermostat has encountered an error. Please contact dealer to replace
the Thermostat.
177 Indoor Temperature Sensor
Error
Wired indoor temperature sensor is not connected or there is a wiring short. Please
contact dealer for assistance.
252 AC Power Lost No AC power detected. Please check the AC circuit breaker.
405 Battery Low Battery low. Please turn the system mode to off and replace the batteries.
407 Battery Critical Battery critical. Thermostat cannot control your system. Please replace the batteries
immediately.
514 Floor Temperature Sensor
Failure
Wired floor temperature sensor is not connected or there is a wiring short. When
the thermostat has been configured for AF mode, the thermostat will still control
the ambient air temperature but will ignore the floor temperature limits. When the
thermostat has been configured to F mode, heating will stop. However, when the air
temperature drops to, or below freeze protection temperature limit, heating will be
activated and control the ambient air temperature.
535 High Floor Temperature The measured temperature is above maximum floor temperature limit.
536 Freeze Protection The measured temperature is below freeze protection temperature limit.
Active alerts are displayed via the alert symbol and alert number in the clock
area on the home screen. You can read more information about active alerts,
snooze or dismiss non-critical alerts in MENU/ALRT.
Alerts

11
Specifications
Temperature Setpoint and Limit Ranges
See ISU settings 431, 432, 575, 576, and 578 starting on page 8.
Working Ambient Temperature
32 °F to 120 °F (0 C° to 48.9 °C)
Operating Ambient Temperature
37 °F to 102 °F (2.8 °C to 38.9 °C)
Shipping Temperature
20 °F to 120 °F (28.9 °C to 48.9 °C)
Operating Relative Humidity
5% to 90% (non-condensing)
Physical Dimensions in inches (mm) (H x W x D)
41/16” H x 41/16” W x 15/32” D
103.5 mm H x 103.5 mm W x 29 mm D
Electrical Ratings
Terminal Voltage
(50/60Hz)
Running
Current
WHeating 2030 Vac 0.021.0 A

Home and Building Technologies
In the U.S.:
Honeywell
715 Peachtree Street NE
Atlanta, GA 30308
customer.honeywell.com
® U.S. Registered Trademark.
© 2017 Honeywell International Inc.
33-00340—01 M.S. 09-17
Printed in U.S.A.
33-00340-01
For assistance with this product, please visit
customer.honeywell.com.
Or call Honeywell Customer Care toll-free at
18004681502.
Customer assistance
Pull to remove the thermostat
from the UWP.
+
CAUTION: MERCURY NOTICE
If this product is replacing a control that contains mercury in a sealed
tube, do not place the old control in the trash. Contact your local waste
management authority for instructions regarding recycling and proper
disposal.
CAUTION: ELECTRICAL HAZARD
Can cause electrical shock or equipment damage. Disconnect power before
beginning installation.