Honeywell LYRIC T4, LYRIC T4R, LYRIC T4M Product Specification Sheet

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

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

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