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Honeywell T4 & T4M
Programmable Thermostat
Honeywell T4R
Programmable Thermostat
The T4, T4M and T4R thermostats are designed to provide
automatic time and temperature control of heating systems
in homes and apartments. The T4 It’s compatible with 24-
230V on/off appliances such as gas boilers, combi-boilers and
heat pump. Also works with zone valve applications but not
with electric heating (240V). The T4M and T4R versions
support also OpenTherm® appliances.
The T4 and T4M are for wired on the wall installations and
the T4R for wireless installations. T4R exist of a thermostat
and a Receiver box.
The solution is designed with the installer in mind and
includes a Receiver module with mounting options for
directly on the wall or on a wall box. Wiring can be from
below or from the back by lifting the terminal platform,
which makes installation quick and easy.
The thermostat has a large and clear fix segment display with
backlight, simple programming philosophy all to make it
easier to install and very user friendly.
The T4 product line is ideal for consumers who want to
control their comfort remotely with a modern design,
simple to program and easy to use product.
FEATURES
• Minimalistic and modern design makes it easy to blend
in any type of homes.
• Table stand or wall mounted thermostat options to fit
new and replacement installations.
• Backlight for easier viewing in all light conditions.
• Factory programmed daily, weekly or 5+2 default
heating schedule.
• Schedule options with 4 or 6 independent set-points to
suit comfort needs.
• Set-point temperature always displayed.
• OFF position has an integral frost protection setting at
minimum 5 °C so that pipes in the house will never
freeze.
• Alert messages to assist in fault finding.
• Timed override function allows to hold a targeted set
point for 1 or 2 hours.
• Away mode allows to reduce the temperature for a
period of 1 to 99 days.
• Automatic time clock adjustment for “Daylight Saving
Time”.
• Receiver box with clear LED indication and override button.
• On/Off or OpenTherm® (T4R/T4M) compatible control.
• A flip up wiring platform for easy wiring.
• User menu allows extra functions to be set at the discretion
of the user:
• Heating schedule
• Date and time setting
• Optimisation
• Lock function
• OpenTherm® alerts (T4M only)
• Installer menu allows extra functions to be set at the
discretion of the installer to match the homeowner’s
applications and needs
• Language selection
• Cycle rate
• Upper / Lower set point limit adjustment
• Minimum ON time
• Daily, weekly or 5+2 schedule option
• 4 or 6 periods a day
• Wired remote sensor
• Fail safe mode
• Clock format
• Daylight saving time change (DST)
• Temperature display offset
• Factory reset
• Binding (T4R only)
PRODUCT SPECIFICATION SHEET
LYRIC T4, T4R& T4M
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T4 PROGRAMMABLE THERMOSTAT
Reference to the icons:
Manual override
Reset
- Delete binding
Status LED
- Communication with
thermostat
- Binding mode
RECEIVER BOX INTERFACE
THERMOSTAT DISPLAY/BUTTON LAYOUT
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T4 PROGRAMMABLE THERMOSTAT
Control form
Room
temperature
display range
Dimensions
(w x h x d)
Time display
Time keeping
accuracy
Program
Time setting
resolution
Sensing
element
Temperature
Setting range
Power
Wiring
SPECIFICATIONS
: Fuzzy Logic
: From 0 °C to 50 °C
: T4/T4M: 136 x 97 x 28 mm
T4R (Wireless) 136 x 98 x 62 mm
: 24 hour or 12 hour AM/PM format
: +/- 10mins per year
: 5+2, weekly or daily schedule with 4 or 6
daily time and temperature level changes
: Program – 15 minute steps
: 10k(@25 °C) NTC thermistor
: Program: 5 to 35 °C
OFF : 5 °C
: Powered by 2 x AA batteries
: T4(wired) and T4M (Opentherm) terminal
block capable of accepting wired up to 1.5
mm
2
T4/T4M/T4R Thermostat
Power
Electrical rating
Cycle rate
Wiring
Wire access
Dimensions
(w x h x d)
IP class
: 230VAC
: 230V~, 50..60Hz, 0.5A to 5A resistence
0.5A to 3A inductive (0.6 pf)
24V~, 50..60Hz, 0.5A to 5A resistence
0.5A to 3A inductive (0.6 pf
: Selectable by application (see installer
set up
: Terminal block capable of accepting
wires up to 1.5 mm
2
: From back via large wall box opening.
From bottom with cable clamps.
Mains wiring – left
Low voltage wiring - right
: 110 x 110 x 40 mm
: 30
Receiver box
Operating
temperature range
Shipping and storage
temperature
Humidity range
EMC
LVD
R&TTE
Wire access
ErP
: 0 to 40 °C
: -20 to 55 °C
: 10 to 90% rh, non- condensing
: 2014/30/EU
: 2014/35/EU
: 1995/5/EC
: From back via large wall box opening.
: Class IV (+2%), (EU) 811/2013 (T4)
Class V (+3%), (EU) 811/2013 (T4R)
Class VI (+4%), (EU) 811/2013 (T4M)
Environmental and standards
Honeywell, declares that this thermostat is in compliance
with the essential requirements and other relevant
provisions of Directive 2014/53/EU
RF operation band
Max, power
Protocol
Comm. Range
Comm. Technology
Receiver class
R.E.D.
: ISM (868.0-868.6) MHz, 1% duty cycle
: 25mW
: Encrypted
: 30m in residential building
environment
: short, high rate transmissions to
minimise air time and avoid collisions
: RX Cat 2 (ETSI EN300 220-1 version
1.3.1)
RF communication
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T4 PROGRAMMABLE THERMOSTAT
INSTALLER MENU
To enter the Installer menu press the button
and then until the display changes (approx. after 3 secs)
Specific Applications Setting What do you need to change?
CpH
(cycle per hour)
Minimum on
Time (min)
Note:
a. To change cycle per hour
b. To change minimum ON time
Heating Gas Boilers
(30kW)
6 1 No action required
Oil Boiler 3 4 a. Set minimum ON time to 4 minutes.
b. Set cycle per hour to 3.
Thermal
Actuator
12 1 Set cycle per hour to 12.
Zone valve 6 1 No actions required
Special Features Description
Opentherm® By connecting the T4M to an OpenTherm® appliance various specific data can be viewed. The
data is depending on what the appliance is providing.
Heat range The normal lower temperature limit of 5 °C can be increased up to 21 °C
to protect the inhabitants from cold. Useful if the inhabitants include the elderly, children or
disabled. The normal upper temperature limit of 37 °C
can be reduced down to 21 °C
to save the homeowner energy. Useful if the homeowner rents
to tenants.
Schedule options The thermostat has the 5+2 by default, however it can be change to 7 days for different
schedule each day of the week or 1 day for having the same schedule during the week
External temperature
sensor (only for wired
versions)
An external temperature sensor can be fitted, allowing the thermostat to control the
temperature from another room or space, where it is inconvenient to locate the thermostat.
It will read the remote sensor every 1 minute. The sensor can be connected up to 50 meters
from the unit. Useful for commercial premises where the public may tamper with the product
Optimisation (optimum
start, optimum stop and
delayed start)
Optimum Start: learns how long it takes your system to reach the temperature you want. It
turns on the heating system earlier to make sure it’s comfortable at the scheduled time.
Optimum Stop: Saves energy and money by switching off a little bit earlier than the normal
programmed time. If the home is up to temperature, it will not notice the effect on the
temperature, but will show a difference in the fuel bill.
Delayed start: Saves energy by slightly delaying the start of heating depending on the
difference between the scheduled temperature and the actual room temperature.
Clock setting Change display format (default 24hr) and adjust time and date.
Temperature offset If the Thermostat is located in a hot/cold location and cannot be moved because of wiring
then the measured/ displayed temperature can be adjusted by +/- 1,5 oC. Useful if the
homeowner wants the reading to match another appliance temperature display.
Binding (only for T4R) Menu to bind the Thermostat and the Receiver box, test the RF signal strength of the radio
communication and to clear an existing binding.
Reset Reset the thermostat back to factory default settings, reset the schedule to default.
Failsafe When the temperature sensor fails(T4,T4M) or the radio communication between the
Thermostat and the Receiver box is lost the device will cycle the demand 20% On / 80% Off
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T4 PROGRAMMABLE THERMOSTAT
Menu item Default What do you need to change?
1LA:Language 1=English 1=English, 2=Dutch, 3=French, 4=German, 5= Spanish, 6=Italian
2CR:Cycle rate 6 3,6,9,12
3OT:Min on time 1 1,2,3,4 or 5 minutes
4LL:Lower Temperature 5 5 °C to 21°C
5UL:Upper Temperature 25 21°C to 35°C
6SO:Schedule options 5+2
1= 7 day (different schedule each day of the week)
2= 5+2 (weekday + weekend schedule)
3= 1 day (same schedule every day of the week)
7NP:Number of periods 4 4 or 6 number of heating periods per day
9LC:Fail safe mode 0
0= Deactivated
1= Activated
10BL:Backlight 1
0= Deactivated
1= Activated (only on demand)
11CL:Clock format 0
0= 24h
1= 12h (AM/PM)
12DS:Daylight saving time change 1
0= Deactivate Daylight saving time change
1= Automatically change time during DST
13TO:Temperature offset 0 -1.5°C to + 1.5 °C
15SD: Restore schedule 0 0
1= Reset the default schedule
16FS: Restore factory settings 0
0
1= Reset the device to factory settings
DIMENSIONS
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T4 PROGRAMMABLE THERMOSTAT
INSTALLATION
To ensure your safety, always make sure mains power is switched OFF before accessing wiring.
Before removing the old thermostat take a picture of the old thermostat’s wiring as a reference then proceed to installation.
The T4 thermostat should not be placed near draughts, in direct sunlight or near heat sources. It should be at least 1.2 - 1.5
meters from the floor.
Prepare Receiver Box (T4R only)
Needed during installation:
• Cable with 2 wires from boiler to Receiver Box (R4H910RF1004).
• The Receiver Box requires 230V power.
Find a suitable location near the boiler. Leave at least 30cm distance from any
metal objects including wall boxes and boiler housing.
Loosen the front screw to remove cover or tighten it when the cover is back in
position.
Install Receiver Box (T4R only)
A. Wall box or Rear wiring
Hinge open the terminal block flap
to access the cables and wall box
screw holes
B. Surface wiring
Hinge open the terminal block flap to
access the cables and wall box screw
holes
C. Replace cover
Locate the hinges at the top of the
cover and wall plate, close the cover
and secure with the screw.
Complete installation(T4R)
Turn mains powers ON to the heating application and the receiver box
Press the manual override
to check if the boiler switches ON.
The button LED lights should light
GREEN
After powering up both
devices the status LED
should be steady GREEN
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T4 PROGRAMMABLE THERMOSTAT
Install Thermostat(T4 and T4M only)
A. Wall plate
Using a screwdriver open wall plate
terminal cover to connect wires.
B. Surface wiring
Connect wires according to wiring
diagrams and clip the cover closed.
C. Place thermostat
Attach the thermostat to the wall
plate when finished
Power Up the Thermostat (T4 and T4R only)
Setup and Configuration
Remove the battery tab and clip the
thermostat onto the wall-plate.
Press + or – to select language
and press to confirm
Press + or – to set date, time and
clock format and press to confirm
After power up, the language selection is displayed on the thermostat’s screen.
BINDING(T4R only)
The T4R thermostat wireless kit comes pre-bound from the factory.
The binding operation described below is only required if:
• The T4 thermostat or the Receiver box is replaced
• The T4 thermostat or the Receiver box has incorrect or no binding data stored
To bind/rebind
Note: When the Receiver box has been bound before, first press with a small pin
the pinhole for approximately 3 seconds to reset the binding, LEDs will flash
amber for a moment.
1. Put the Receiver box into binding mode by pressing the button for 3 secs.
The LED will flash amber.
2. Enable binding on thermostat:
Enter binding menu by pressing and hold the for 3 secs and the press
the – button.
Change parameter 14A to 1 and press to confirm
3. When binding is successful:
The will appear on the thermostat’s screen.
The Receiver box status LED will show steady green
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T4 PROGRAMMABLE THERMOSTAT
WIRING (T4 and T4M only)
WIRING (T4R only)
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T4 PROGRAMMABLE THERMOSTAT
TROUBLESHOOTING – T4 and T4M only
Problem Display Possible Cause Remedy
Thermostat display is blank Batteries exhausted, installed
incorrectly or tab hasn't been
removed
Unclip thermostat from wall and check
battery installation - replace batteries if
necessary
Display shows
(only for T4)
Battery power critically low Unclip thermostat from wall and replace
batteries immediately
Display shows Faulty temperature sensor Replace thermostat or check wiring to
remote temperature sensor if fitted
Thermostat shoes heat
demand but boiler doesn’t
respond
a. Boiler water already at
temperature
b. Faulty wiring connection
a. Normal behaviour – wait for water
temperature to drop
b. Check wiring at thermostat and boiler
terminals
TROUBLESHOOTING – T4R
Problem Display Possible Cause Remedy
Thermostat display is blank Batteries exhausted, installed
incorrectly or tab hasn't been
removed
Pull thermostat from wall bracket or
table stand and check battery installation
- replace batteries if necessary
Display shows Battery power critically low Pull thermostat from wall bracket or
table stand and check battery installation
- replace batteries if necessary
Display shows Faulty temperature sensor Replace thermostat or check wiring to
remote temperature sensor if fitted
Thermostat shoes heat
demand but boiler doesn’t
respond
a. Boiler water already at
temperature
b. Faulty wiring connection
a. Normal behaviour – wait for water
temperature to drop
b. Check wiring at thermostat and boiler
terminals
Thermostat displays shows
and Receiver Box
LED is flashing RED
Wireless communication with
Receiver Box is lost
Move thermostat to a location where
wireless communication is reliable
Thermostat displays shows
and Receiver Box
LED is flashing OFF
Thermostat and Receiver Box
not bound
Move thermostat to a location where
wireless communication is reliable
Receiver Box LED is flashing
ORANGE
Receiver Box is in bind mode Wait for bind mode to time out (3min) or
bind a Thermostat
ORDERING SPECIFICATION
Description Model EAN code Literature
T4 wired thermostat T4H110A1021 5025121381215
All packaging contains 6
languages: English,
Dutch, French, German,
Italian and Spanish
T4 wired thermostat for
OpenTherm boilers
T4H310A3032 5025121381208
T4 wireless thermostat Y4H910RF4003 5025121381079
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