Bosch Room thermostat II 230 V Operator's manual

Room thermostat II 230 V
quick instructions
Product description
The room thermostat II 230 V allows you to control
your wired heating applications conveniently via
your Smart Home system.
Description of the symbols
Warning!
Note about hazards
Note:
Additional
important information
Note about the installation video
8-750-002-395

Safety instructions
▶ Read this user manual completely before installing
or commissioning the device and pay particular
attention to the hazard information.
▶ The installation of this device and work on the
230 V network must only be carried out by an
electrician.
▶ The device is not a toy! Do not allow children to
play with it. Never leave the packaging material
lying around unattended. Plastic film and small
parts may pose a danger to children.
▶ This device may be used by children from 8
years of age and by persons with reduced
physical, sensory or mental capacities, or a lack
of experience and knowledge provided these
persons are supervised or have been instructed
in the safe use of the device, and understand the
corresponding risks.
▶ When remotely or automatically controlling a
device, it is not always possible to guarantee
that commands are actually executed or that the
correct device status is displayed in the app and
on other Smart Home display devices because of
external circumstances. This may lead to material
damage and/or personal injury. Therefore, you
must ensure to the greatest extent possible that
no person is endangered at the time of remote
operation or automated control. Please take
special care when setting up or adjusting the
remote control or when using the automated
control and check the desired functionality at
regular intervals.

▶ Do not paint over the device! Do not apply
wallpaper or paste over the device!
▶ The device is not suitable for disconnection.
▶ For safety and approval reasons (CE/UKCA), the
device may not be modified and/or no changes
may be made to the device without authorisation.
▶ Any use other than that which is described in the
user manual is considered improper and leads to
the exclusion of guarantee and liability.
▶ We accept no liability for material damage or
personal injury which is caused by improper use or
failure to observe the safety instructions. In these
cases, any guarantee claim becomes void! We
accept no liability for consequential damage.
▶ Do not use the device if it has damage visible from
the outside, for example, to the housing, control
elements or connection sockets, or if it has a
malfunction. If in doubt, please contact our service
team.
▶ Only operate the device indoors and do not expose
it to moisture, vibrations, constant sunlight or
other sources of heat, extreme cold temperatures
and mechanical stress.
▶ Do not open up the device. It does not contain
any parts to be maintained by the user. If a fault
occurs, have the device checked by a specialist.
▶ Only use the device together with original
components and recommended products from
Bosch partners.
▶ Only operate the device with the control element
attached.

Notes
▶ The range within buildings can differ significantly
from the range in open spaces. In addition to the
transmitting power and the receiving properties
of the receiver, environmental factors such as
humidity, as well as the local structural situation,
play an important role.
▶ The device is only intended for use in residential
environments.
▶ The device is only intended for private use.
You can also use the explanatory videos and
additional information on our website as an
additional aid for mounting, installing, starting
up and restoring the factory settings on your
Bosch Smart Home room thermostat II 230 V:
www.bosch-smarthome.com/rom/
room-thermostat-2-230V

Product overview
1
2
3
4
5 7
9
86
Item Name
1Control unit
2LED display
3Status LED
4Rotary knob / system button
5In-wall housing (power supply and switching
relay)
6Control unit connector
7Power supply and consumer terminals
8Sensor terminals
9Wire bridge
(Only use consumers at 230 VAC!)
bc
d
ef
g
a
h
LED display (2)
Item Name Description
aInformation area Displays error codes or other additional
information.
bHumidity Displays room humidity in normal operation.
cSecondary temperature display Reserved for the display of further temperature
values (if applicable, optional accessories required)
dStatus indicators
Power supply loss Appears when the 230 V power supply is down.
Connection status Wireless connection to the controller is active. In
the event of constant flashing, there is a connection
problem with the controller.
Child lock Press the system button > 3 seconds, adjust the
desired value by turning
Open window The system has detected an open window in the
room. Heating/cooling mode paused.
eCooling mode The device/system is set to cooling mode.
fHeating mode The device/system is set to heating mode.
gRoom control modes
(press system button 1x, select mode)
Automatic Room control is controlled via a schedule.
Manual Temperature at constant value. Can be changed via
rotary knob.
Rest mode Heating or cooling mode paused.
hValue display Displays actual and set temperature. Other
text information in case of an error or during
configuration.

The status LED (3) shows the status of the room
thermostat using flashing codes.
Signal Meaning Measures
Flashes
orange
Pairing mode
(is active)
or device is
communicating
with the
controller
Please wait
Flashes
green
Pairing mode
(successful)
or process
confirmed
Flashes
red 1x
Pairing mode
(not successful)
or
process failed
If this is the first
tuning attempt,
please try again.
Otherwise reset
the device to the
factory settings and
contact the service
department if
necessary.
Flashes
red
every
15 sec-
onds
Functional error Look for information
in the Smart Home
app. Contact the
service team if
necessary.

Notes regarding installation
The standards and directives applicable in your
country must be observed during planning,
set-up, operation and maintenance.
The device is part of the building installation.
Operation of the device is only permitted
at 230V/50Hz AC voltage. Work on the
230V network may only be carried out by an
electrician. The applicable accident prevention
regulations must be observed here. To avoid
an electric shock on the device, please switch
off the mains power. Failure to observe the
installation instructions may result in fire or
other hazards.
Mounting must be carried out following the
applicable requirements. Failure to observe the
requirements may result in damage to property
and/or injury, or even danger of death.
Please also note any additional information on
the product.
A 230 volt alternating current power supply is
required for this product (the device must have
a phase and neutral conductor).
The product is only intended for fixed
installation in in-wall switch boxes with a
minimum depth of 35 mm and a screw distance
of 60 mm (in accordance with DIN 49073-1) in
indoor areas.
The supplied wire bridge (connection “COM”
and “L” connections) may only be installed with
230 VAC consumers. Non-observance can lead
to destruction of the device, fire or electrical
accident!
When connecting the device terminals, ensure
that permitted wires and wire cross sections
are used.

The consumers connected to the relay outputs
must have sufficient insulation.
Observe the technical data, in particular
the maximum permissible switching power
of the relay and the type of consumer to be
connected, before connecting a consumer.
The device should only be loaded to the
specified power limit. Overloading may result
in destruction of the device, fire or an electrical
accident. Among other things, reliable
switching off of the connected consumer
cannot be guaranteed.
The power circuit to which the device and the
load are connected must be secured with a
circuit breaker in accordance with EN60898-1
(trigger characteristics B or C, max. 16A rated
current, min. 6kA breaking capacity, energy
limitation class 3). Installation guidelines
in accordance with the applicable national
standards, e. g. VDE 0100 or HD384 or IEC
60364, must be observed. The circuit breaker
must be easily accessible for the user and
labelled as a disconnecter for the device.
When using the device in wet rooms such as
bathrooms, a minimum distance of 60 cm from
wet areas, such as a bathtub, shower or wash
basin must be maintained.
Installation and mounting
Before you start: Be sure to shut off the power
circuit breaker!
If necessary, remove an existing thermostat.
Connect the room thermostat II 230 V according to
the connection diagram that suits you.

Operation with 230 V devices
L
N
T
230V
AC
Connec-
tion Description
L External conductor (230 VAC)
NNeutral conductor
COM
Voltage-free input. For 230 V devices,
connect the supply voltage to “L” via a
wire bridge.
NO Switching output for consumers
S1/S2 Connections for external sensors or
potential-free contacts.
T
External temperature sensor (available
as optional accessory), e. g. installed
in the floor.
230 V actuator

Operation with 24 V devices
L
N
T
230V
AC
~24V
AC
Connec-
tion Description
L External conductor (230 VAC)
NNeutral conductor
COM
Voltage-free input.
For 24 V devices, input for the external
24 V voltage supply.
NO Switching output for consumers
S1/S2 Connections for external sensors or
potential-free contacts.
T
External temperature sensor (available
as optional accessory), e. g. installed
in the floor.
24 V actuator

Operation with boiler
L
N
230V
AC
Connec-
tion Description
L External conductor (230 VAC)
NNeutral conductor
COM Voltage-free input.
NO Voltage-free output.
S1/S2 –
Attach the in-wall housing to the wall box using
suitable screws. Pay attention to correct orientation
(Bosch writing at the top and readable): Place the
control unit on the in-wall unit and press it in until it
clicks into place.
Now switch the power back on.
As soon as the room thermostat is connected to the
power supply, tuning mode starts and is active for
3minutes. Tuning mode can be restarted at any time
by pressing the system button (4).

The room thermostat can also be operated
independently, with no connection to the Smart
Home system. The range of functions is then
essentially limited to displaying and controlling
the room temperature in conjunction with the
connected heat generator according to the preset
target temperature in the manual operating mode
(without a time program).
In the event that an initial start-up is required without
a Smart Home system (e.g. new build), basic settings
can be made on the device via an installer mode.
To this end, press and hold the rotary knob (4) for
at least 3seconds until the display shows “INS”. By
turning the knob (4) you can make a selection and
confirm the selection by pressing it.
Display Description
Level
1
Level
2
Level
3
UFH Potential application, e. g.
230 V/24 V actuators
NC Normally closed actuator
HT Heating mode
CL Cooling mode
NO Normally open actuator
HT Heating mode
CL Cooling mode
VFH – – Potential-free application,
e.g. boiler
RAD – –
Radiator, operation with
2nd generation Bosch
Smart Home radiator
thermostats

After connecting the room thermostat to the
Bosch Smart Home system, you can also make
all device settings in the Smart Home app.
Start-up
Ensure that you have a Bosch Smart Home
controller and the Bosch Smart Home app and have
successfully configured both. Now start the Bosch
Smart Home app and select “Add new device”. Follow
the instructions in the app.
Resetting to factory settings
You can reset the device to its factory settings as
follows:
Remove the control unit from the in-wall housing.
When reinserting it, hold the rotary knob (4) until
“RES” appears on the display. Release the rotary
knob and press it again. The device then restarts.
Please note that it can take a few seconds until the
room thermostat is ready for operation again.
When resetting to factory settings, the settings
and information are only lost from the device
and not from the Bosch Smart Home controller.
To re-configure the device, first delete it in the
device management section of the Bosch Smart
Home app and then add it again in the usual
configuring process.

Maintenance and cleaning
The device does not require maintenance. Leave any
repairs to a specialist. Clean the device with a soft,
clean, dry and lint-free cloth. When cleaning, do not
use any cleaning agents containing solvents.
Simplified declaration of conformity
Robert Bosch Smart Home GmbH hereby
declare that the radio equipment type Bosch
Smart Home BTH-RM230Z corresponds with the
directive 2014/53/EU. The complete text of the EU
declaration of conformity is available via the following
web address: https://gb-doc.bosch.com
Robert Bosch Smart Home GmbH hereby de-
clares that the radio system type BTH-RM230
complies with Regula tion 2017. The full text of
the declaration of conformity is available at the follow-
ing internet address: https://gb-doc.bosch.com
Environmental protection and disposal
Electrical or electronic devices which are no
longer usable must be collected separately
and disposed of via an environmentally
friendly recycling facility (European Directive on
Waste Electrical and Electronic Equipment). Use your
country’s specific return and collection systems when
disposing of waste electrical or electronic devices.

Technical data
Device type designation BTH-RM230Z
Protection type IP21
Ambient temperature 0 – 50 °C
Max. humidity 80 % (non-condensing)
Housing dimensions (W × H × D) 86 × 87 × 35 mm
Weight 131 g
Radio protocol ZigBee 3.0
Radio frequency 2.4 – 2.4835 GHz
Max. transmitting power 10 dBm
Radio range in the open < 100 m
Software class A
Receiver category 2
Supply voltage 230 VAC/50 Hz
Max. power consumption 1 A
Overload protection Thermal cutoff
Cable type and cross section Rigid and flexible cable 1.0 – 1.5 mm²
Installation In device sockets with a depth of at least 35mm and
a device screw spacing of 60mm
Switch output Potential-free relay
Max. switching power
Ohmic load 3 A
Inductive load 1 A
Capacitive load –
Mode of operation Type 1.B
Withstand voltage 3,000 V
Ball pressure test temperature 125 °C
Degree of soiling 2
Design Independently mounted, electronic control device
Technical modifications reserved

Service information
Robert Bosch Smart Home GmbH
Schockenriedstraße 17
70565 Stuttgart-Vaihingen
Germany
ser[email protected]
@ www.bosch-smarthome.com/service
8-750-002-395 V003 09/2022
Spare parts / accessories
For information on available spare parts or accesso-
ries, please visit:
https://www.bosch-smarthome.com/rom/
spareparts