Bosch Room thermostat II Operator's manual

Room thermostat II
quick instructions
Product description
The room thermostat II measures the temperature at
a suitable location in the room and ensures a more
stable and efficient temperature control. It is the per-
fect complement to your Bosch Smart Home radia-
tor thermostats.
Description of the symbols
Warning!
Note about hazards
Note:
Additional
important information
Note about the installation video
8-750-002-423

Safety instructions
▶ Read this user manual completely before installing
or commissioning the device and pay particular
attention to the hazard information.
▶ Do not charge used batteries, and do not attempt
to reactivate them using heat or other means. Do
not short-circuit batteries. Do not expose batteries
to strong sunlight. Do not throw batteries into fire!
There is a risk of explosion!There is a risk of explosion!
▶ Make sure the polarity is correct when insert-
ing the batteries! Only use batteries of the same
type. Drained batteries must be removed from the
device immediately. Remove batteries from the
device if it is not in use for a long period of time.
Increased risk of leakage!Increased risk of leakage!
▶ Store small cells and batteries which could be
swallowed out of the reach of children. Swallowing
can result in burns, perforation of the soft tissue
and death. Severe burns can occur within 2 hours
after swallowing. In the event that a cell or battery
is swallowed, seek medical assistance immedi-
ately.
▶ 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, sen-
sory or mental capacities, or a lack of experience
and knowledge provided these persons are super-
vised 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 cor-
rect device status is displayed in the app and on
other Smart Home display devices because of

external circumstances. This may lead to mate-
rial damage and/or personal injury. Therefore, you
must ensure to the greatest extent possible that no
person is endangered at the time of remote opera-
tion 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 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.
▶ We accept no liability for material damage or per-
sonal 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.
▶ 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.
▶ Do not paint over the device! Do not apply wallpa-
per over the device!
▶ Any use other than that which is described in the
user manual is considered improper and leads to
the exclusion of guarantee and liability.
▶ 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 mal-
function. 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.
▶ Only use the device together with original com-
ponents and recommended products from Bosch
partners.

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 humid-
ity, 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:
www.bosch-smarthome.com/rom/
room-thermostat-2

Product overview
1
2
3
4
5 9
10
8
7
6
Item Name Explanation
1Device front view
2LED display
3Status LED
4Rotary knob/system
button
5Device rear view
6Sensor connection Connection for op-
tional accessories.
7Mounting bracket
receiving openings
For different angles
of inclination of the
device.
8Battery compart-
ment
Ensure correct po-
larity when inserting
the batteries!
9Mounting plate Used to attach the
device to the wall.
10 Mounting bracket
Used to install the
device on even
surfaces.
b
c
de
f
g
a

LED display (2)
Item Name Description
aInformation area Displays error codes or other additional informa-
tion.
bHumidity Displays room humidity in normal operation.
cStatus indicators
Battery status Appears with low battery charge
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.
dCooling mode The device/system is set to cooling mode.
eHeating mode The device/system is set to heating mode.
fRoom 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.
Heating break The regulation in the room pauses.
gValue display Displays actual and set temperature. Other text
information in case of an error or during configura-
tion.

The status LED (3) shows the status of the room ther-
mostat using flashing codes.
Signal Meaning Measures
Flashes
orange
Pairing mode (is
active) or device
is communicat-
ing 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 tun-
ing 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 informa-
tion in the Smart
Home app. Contact
the service team if
necessary.
Notes regarding installation
When selecting the mounting location and when
drilling, pay attention to the areas where elec-
trical wires run, or to any supply cables.

Start-up
Ensure that you have a Bosch Smart Home control-
ler and the Bosch Smart Home app and have suc-
cessfully 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:
Open the battery compartment (8) and remove one
of the batteries. Replace the battery while holding the
rotary knob (4) pressed. Hold the knob pressed until
the status LED (3) on the room thermostat flashes
orange and “RES” appears on the display. Now
release it briefly and press the knob again and hold
until the LED lights green. 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
Removing or changing the batteryRemoving or changing the battery
To remove or replace the batteries, remove the
device from the mounting plate (9) or first remove the
mounting bracket (10). Open the battery compart-
ment(8). Remove the batteries. Take care to ensure
the correct polarity when replacing them.
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-RM corresponds with the directive
2014/53/EU. The complete text of the EU declaration
of conformity is available via the following web
address: https://eu-doc.bosch.com
Robert Bosch Smart Home GmbH hereby
declares that the radio system type BTH-RM
complies with Regulation 2017. The full text of
the declaration of conformity is available at the
following 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.
Used batteries do not go in the household
waste! Dispose of them at your local battery
collection point!

Technical data
Device type designation BTH-RM
Protection type IP21
Ambient temperature 0 – 50 °C
Max. humidity 80 % (non-condensing)
Dimensions (W × H × D) 86 × 87 × 28 mm
Weight (without batteries) 85 g
Radio protocol ZigBee 3.0
Radio frequency band 2.4 – 2.4835 GHz
Max. transmitting power 10 dBm
Radio range in the open < 100 m
Software class A
Receiver category 2
Batteries 4 × 1.5 V Micro/AAA/LR3, alkaline
Battery lifespan (typical) < 2 years
Technical modifications reserved

Spare parts / accessories
For information on available spare parts or
accessories, please visit:
https://www.bosch-smarthome.com/rom/
spareparts

Service information
Robert Bosch Smart Home GmbH
Schockenriedstraße 17
70565 Stuttgart-Vaihingen
Germany
ser[email protected]
@ www.bosch-smarthome.com/service
8-750-002-423 V002 08/2022