
1
Turn OFF the power
and remove the old thermostat
T6
SMART THERMOSTAT
Compatible with 24-230V on/off and OpenTherm®
Need help? For assistance please visit: getconnected.honeywell.com
Honeywell Control Systems Ltd., Skimped Hill Lane,
Bracknell, Berkshire, RG12 1EB
Approvals
Conforms to protection requirements of the following directives: EMC: 2014/30/EU,
LVD: 2014/35/EU and RED: 2014/53/EU. Hereby, Honeywell, declares that this
thermostat is in compliance with the essential requirements and other relevant
provisions of Directive 2014/53/EU. The full text of the EU Declaration of Conformity
is available at the following Internet address: http://hwll.co/DoC
Wi-Fi (2.4GHz): Max Power 100mW, 2.4–2.458GHz
ErP: Class V (+3%), (EU) 811/2013
Must be installed by a competent person!
Read these instructions carefully. Failure to follow these instructions
can damage the product or cause a hazardous condition.
appliances such as gas boilers, combi-boilers and heat
pump. Also works with zone valve applications but not
with electric heating (240V).
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 reference then proceed to installation.
1.2-1.5 m
The T6 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.
Maximum cable length between Receiver box and thermostat:
15m for 0.5mm² cable or 20m for 1.0mm² cable.
WEEE Directive 2012/19/EC
Waste Electrical and Electronic Equipment directive
At the end of the product life dispose of the packaging and product in a
corresponding recycling centre. Do not dispose of the unit with the usual
domestic refuse. Do not burn the product.
Prepare Receiver Box
2
Before installation of the
Receiver Box
Find a suitable location near
to the boiler.
Needed during installation:
Cable with 2 wires from the Receiver Box (R4H810A) to thermostat.
Cable with 2 wires from the boiler to Receiver Box.
The Receiver Box requires 230V power
for installation
Loosen the front
screw to remove
cover or tighten it
when the cover is
back in place.
Install the
3
A) Wall box or Rear Wiring
Receiver Box
Hinge open the terminal block flap
to access the cables and wall box
screw holes.
Max 6 mm
min 0.25mm2
max 1.5mm
Please refer to the wiring
diagrams over the page
B) Surface wiring
Use the cable clamps to secure the
surface wiring.
C) Replace the cover
Locate the
hinges at the top
of the cover and
2
wall plate, close
the cover and
secure with the
screw.
Install the
4
Remember to use the same wires that you
connected to the Receiver Box when
connecting to the thermostat.
A) B)
T6 thermostat
Using a screwdriver open
wallplate terminal cover to
connect wires
Optional Coverplate
installation
Connect 2 thermostat wires to the
T and T terminals and close cover.
T
T
T
T
S
S
Complete
5
Turn ON mains power to the Heating Appliance and Receiver Box.
After
powering up both
devices the green
LED is on.
installation
Push the button to
check if the boiler
switches on.
Button lights green.
After power up,
SETUP is displayed
on the thermostat’s
screen.
Attach the thermostat to the
C)
wallplate when finished.
32308180-017 A

6
Set Up and
configuration
Once setup is completed, if you need to
change more settings go to the advanced
menu. To access the advanced menu
press for 5 seconds.
AM
PM
*1234
AM
PM
*****230****
1 2 3 4 5 6
AM
PM
***SETUP****
1) Touch to begin
setting up the thermostat.
SETUP
*CLOCK
3) Set the clock format,
time and date.
SETUP
**LANGUAGE**
2) Select your language.
SETUP
CONFIGURE W
4) Touch to finalise setup.
( to setup using the App is
currently unsupported)
In the advanced menu the following
settings can be adjusted:
Menu Item Default Options
LANGUAGE
OPENTHERM
CYCLE RATE
MINIMUM ON TIME
HEAT RANGE
SCHEDULE OPTIONS
EXTERNAL SENSOR
OPTIMISE
CLOCK
LOW LOAD CONTROL
TEMPERATURE OFFSET
RESET
FAILSAFE
English
-
6
1 minute
Min = 5.0ºC
Max = 35.0ºC
Daily
No sensor 0 = No sensor, 1 = Room sensor
Opt. start OFF
Opt. stop OFF
Format: 24h
Time: --:-Date: 01/09/16
ON 0 = OFF, 1 = ON
0.0ºC 1.5 ºC to 1.5ºC
-
OFF
0 = English, 1 = Français, 2 = Español
3 = Deutsch, 4 = Nederlands, 5 = Italiano
OpenTherm boiler data when available
3, 6, 9 or 12
1, 2, 3, 4 or 5 minutes
Min: 5ºC to 21ºC, Max: 21ºC to 35ºC
1 = Daily schedule, 2 = 5+2 days schedule
Opt. start: 0 = OFF, 1 = ON, 2 = Delayed start
Opt. stop: 0 = OFF, 1 = ON
Clock format: 1 = 12h, 2 = 24h
Setup time and date
Factory, schedule, WiFi and HomeKit reset
0 = OFF, 1 = ON
5 sec
Wiring Diagrams
A) Basic 230V boiler B) Combi boiler
Receiver Box
Thermostat
s s
Boiler
Receiver Box
Thermostat
s s
T1 T2
Boiler*
C) OpenTherm boiler D) Two-port zone valve or S-plan
Receiver Box
Thermostat
Receiver Box
s s
T1 T2
Boiler*
For other wiring
diagrams visit:
www.honeywelluk.com/
professional-zone/resource-centre/
WiringDiagrams/
V4043
Thermostat
s s
* See boiler specifications for correct terminals
Manufactured for and on behalf of the Environmental and Energy Solutions Division of Honeywell
Technologies Sàrl, ACS-ECC EMEA, Z.A. La Pièce 16, 1180 Rolle, Switzerland by its Authorised
Representative Honeywell Inc.