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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

Summary of Contents for LYRIC T4

Page 1: ...able 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 ...

Page 2: ...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 ...

Page 3: ...to 3A inductive 0 6 pf Selectable by application see installer set up Terminal block capable of accepting wires up to 1 5 mm2 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 ...

Page 4: ...nt 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 su...

Page 5: ...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 Tem...

Page 6: ... 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 ...

Page 7: ...G 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 re...

Page 8: ...T4 PROGRAMMABLE THERMOSTAT WIRING T4 and T4M only WIRING T4R only ...

Page 9: ...lly 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 ...

Page 10: ......

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