Eurotronic CZW-250 User manual

CZW-250 Energy-Saving
Controller with WiFi
OPERATING INSTRUCTIONS

2
CZW-250
LEGAL NOTICE
Operating Instructions
CZW-250 Energy-Saving Controller with WiFi
Manufacturer
EUROtronic Technology GmbH
Südweg 1
36396 Steinau-Ulmbach
Germany
www.eurotronic.org
Publisher
Ingenieurbüro FORMAT GmbH
Ebertstraße 80
26382 Wilhelmshaven
Germany
www.format-docu.de
Operating Instructions
Status 2023.10
Version 1.0 / EN
Legal Information
All brand names and trademarks mentioned in this document and, where applicable, protected by
third-party rights, are subject without restriction to the provisions of the applicable trademark law and the
ownership rights of the respective registered owners. Comply with all local and regional laws and regula-
tions as well as the safety regulations referred to in this document.
Copyright Notice
The contents of this document are protected by copyright.
The disclosure, transfer and any other distribution of the contents of this document to third parties, the
making of copies, transcripts and other reproductions as well as utilisation and any other use are prohibit-
ed - even in part - without the prior, express and written consent of the author.
© 2023 All rights reserved.

3
CZW-250
CONTENTS
These operating instructions will guide you through the commissioning and use of your CZW-250 and
answer all essential questions. Read these operating instructions carefully before using your CZW-250.
Hand over all documents when passing it on to third parties.
1 Safety Information.................................................................................4
1.1 Depiction of warnings................................................................................4
1.2 Warnings............................................................................................5
2 Scope of Delivery..................................................................................7
3 Overview..........................................................................................8
3.1 Proper use...........................................................................................8
4 Controls and Display Elements .....................................................................9
5 Putting into Operation ............................................................................10
5.1 Installing Eurotronic Smart Living 2.0 app ........................................................... 10
5.2 Creating user account . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.3 Adding new device................................................................................. 12
5.4 Selecting network.................................................................................. 13
5.5 Inserting batteries. ................................................................................. 14
5.6 Teaching in CZW-250............................................................................... 15
5.7 Installing on radiator ............................................................................... 18
5.8 Adapter overview.................................................................................. 20
5.9 Adapting CZW-250................................................................................. 22
5.10 Naming and assigning CZW-250.................................................................... 23
6 Removing CZW-250 ..............................................................................25
7 Configuring App...................................................................................26
7.1 Setting temperature in a room...................................................................... 27
7.2 Device settings. .................................................................................... 29
7.3 Heating profile..................................................................................... 30
7.4 Holiday............................................................................................ 34
7.5 Customer service .................................................................................. 38
8 Operating Modes & Functions.....................................................................40
8.1 Basic operating modes............................................................................. 40
8.2 Additional functions................................................................................ 41
8.3 Resetting to factory settings........................................................................ 43
9 Troubleshooting ..................................................................................44
10 Cleaning and Storage..............................................................................45
11 Appendix.........................................................................................46
11.1 Technical data...................................................................................... 46
11.2 Support and contact................................................................................ 46
11.3 Disposal........................................................................................... 47
11.4 Personal data...................................................................................... 47
11.5 Simplified declaration of conformity................................................................. 47
11.6 Warranty notice.................................................................................... 48
11.7 Manufacturer...................................................................................... 48

4
CZW-250
Safety Information
1SAFETY INFORMATION
In addition to the safety information in these operating instructions, all other available sources must also
be observed.
The areas of use defined in the written explanations of the proper use must be observed.
1.1 DEPICTION OF WARNINGS
The warnings used in these operating instructions have the following meaning:
CAUTION!:
Moderate to minor personal injury may occur if warnings with this signal word are disregard-
ed.
ÎProbability of occurrence: possible
IMPORTANT!
Material damage can occur if warnings with this signal word are disregarded.
ÎProbability of occurrence: possible
INFORMATION
Contains additional information.

5
CZW-250
Safety Information
1.2 WARNINGS
When operating your CZW-250 and its components, hazards may occur that can be avoided by observing
the following warnings.
CAUTION!:
Serious risk of injury caused by exploding batteries!
Improper handling of batteries can lead to an explosion.
ÎDo not heat batteries and do not throw batteries into open fire.
ÎDo not place batteries in direct sunlight.
ÎProtect batteries from excessive heat.
ÎDo not short-circuit the batteries.
ÎNever attempt to charge non-rechargeable batteries.
ÎNever dismantle batteries.
ÎDo not use new and used batteries together.
ÎWhen inserting the batteries, observe the correct polarity (+/-).
ÎBefore inserting the batteries, clean the batteries and the contacts in the thermostat.
CAUTION!:
Serious risk of injury caused by chemical burns!
Leaking battery acid can cause burns.
ÎAvoid contact of battery acid with skin, eyes and mucous membranes.
ÎIn case of contact with battery acid, immediately rinse the affected areas with plenty of
clean water and consult a doctor.
CAUTION!:
Serious risk of injury caused by malfunction!
Malfunctions can lead to injuries.
ÎNEVER carry out repairs to your CZW-250 yourself.
ÎDo not open your CZW-250.
ÎDo not carry out any modifications or conversions on your CZW-250.
ÎIn the event of an error, contact Customer Service.

6
CZW-250
Safety Information
CAUTION!:
Risk of fatal injury and accidents to infants and children!
The CZW-250 and packaging material represent a risk of choking and suffocation.
ÎNever leave children unsupervised with your CZW-250 or the packaging material. Chil-
dren often underestimate the risks involved. Always keep children away from your
CZW-250 and the packaging material.
ÎKeep batteries out of reach of children. Should a battery be swallowed, seek medical
attention immediately.
ÎYour CZW-250 is not a toy.
IMPORTANT!
Material damage and malfunction possible!
Your CZW-250 can be used by children aged from 8 years and above and persons with reduced
physical, sensory or mental capabilities or lack of experience and knowledge if they have been
supervised or instructed in the safe use of your CZW-250 and understand the hazards involved.
ÎChildren may not play with your CZW-250.
ÎCleaning and user maintenance must not be carried out by children without supervision.
IMPORTANT!
Material damage and malfunction possible!
Environmental influences can affect the functions of your CZW-250.
ÎKeep your CZW-250 away from direct sunlight.
ÎOnly use your CZW-250 in a dry, dust-free environment.
IMPORTANT!
Material damage and malfunction possible!
Damaged components and/or malfunctions will prevent your CZW-250 from functioning prop-
erly.
ÎIf material damage and/or malfunctions occur, contact the Customer Service of
Eurotronic Technology GmbH.

7
CZW-250
Scope of Delivery
2SCOPE OF DELIVERY
Check the scope of delivery for completeness as well as visual and technical defects before putting your
CZW-250 into operation.
•1× CZW-250 Energy-Saving Controller
•1× Quick Guide
•3× Adapter (Danfoss RA/RAV/RAVL)
•1× Screw for adapter
•2× AA/LR6 batteries
•1× Reset button (only for older models)
IMPORTANT!
Material damage and malfunction possible!
Damaged components and/or malfunctions will prevent your CZW-250 from functioning prop-
erly.
ÎIf material damage and/or malfunctions occur, contact the Customer Service of
Eurotronic Technology GmbH.
INFORMATION
The following drawings are for the purpose of illustration and are not necessarily to scale.
EUROtronic Technology GmbH reserves the right to change the design or dimensions without
prior notice.
2× AA/LR6 batteries
Screw
for adapter
CZW-250 energy-saving controller
*When using the RAV adapter, the RAV pin is required to extend the valve plunger.
RAV
RA
RAVL
RAV pin*

8
CZW-250
Overview
Reduce heating costs
with energy-efficient control.
WiFi connection
Control and configure your
CZW-250 via the 2.4 GHz WiFi network.
Easy assembly
without intervention in the heating water circuit.
3OVERVIEW
Thank you for choosing a product from EUROtronic Technology GmbH. Your CZW-250 is an energy-saving
controller for radiators equipped with the WiFi radio standard with modern, simple operation. It automat-
ically regulates your room temperature according to your specifications and is configurable, either directly
on the controller or conveniently with a smartphone via your WiFi network.
Your CZW-250 helps you to effectively reduce your heating costs.
Development and production are 100% "Made in Germany", which guarantees premium quality and tech-
nology. These operating instructions will help you to get your CZW-250 up and running quickly and easily.
3.1 PROPER USE
Your CZW-250 is used to regulate a radiator valve. This makes it possible to regulate the room temper-
ature time-controlled and via an app. Your CZW-250 moves a radiator valve to control the flow of heat
into the radiator. Your CZW-250 can be installed on all common radiator valves. Only use your CZW-250
indoors.
Any use other than that described in these operating instructions is not in accordance with the proper use
and will result in the warranty being voided and exclusion of liability. It is forbidden to complete any unau-
thorised modifications, conversions and repairs. Your CZW-250 is intended for private use only.
INFORMATION
The drawings in these instructions are for the purpose of illustration and are not necessarily to
scale. Product designations and pictograms on screenshots may differ from the actual prod-
uct.

9
CZW-250
Controls and Display Elements
Symbol lights up
Connected to server
Symbol flashes
Connection to server is established
Symbol off
No connection to WiFi network
4CONTROLS AND DISPLAY ELEMENTS
The following section describes the controls and display elements of your CZW-250.
1
Union nut
2
Wireless symbol
3
+ button (increase temperature)
4
- button (decrease temperature)
5
Temperature display
6
Reset button
1
2
3
4
5
6

10
CZW-250
Putting into Operation
5PUTTING INTO OPERATION
The following section describes the procedure using the Eurotronic Smart Living 2.0 app for the Android
operating system (app version: 1.2). The procedure may differ for the iOS operating system.
INFORMATION
The following illustrations show the app at the time of publication of these operating instruc-
tions. Newer versions of the app may differ in appearance and content.
The illustrations in these instructions are for illustrative purposes only. Product designations
and pictograms on screenshots may differ from the actual product.
5.1 INSTALLING EUROTRONIC SMART LIVING 2.0 APP
1. Download the Eurotronic Smart Living 2.0 app from Google Play (Android) or the App Store (iOS).
2. Install the app on your smartphone.
System requirements:
Android from version 6.0
iOS from version 13
INFORMATION
During the initial setup of the app, requests are made as to whether the app is granted author-
isation to access functions of your smartphone. Allow access to use the full range of functions
of your CZW-250.

11
CZW-250
Putting into Operation
5.2 CREATING USER ACCOUNT
You must create a user account to use the app:
1. Create a user account. Enter your e-mail address and assign a password. Make sure your e-mail is
valid. The validity of the e-mail address will not be checked.
2. Check the box to accept the general terms and conditions and data protection policy.
3. Tap the Register button.
ÎYou will receive an activation code by e-mail to verify your user account. Also check your spam
folder.
4. Enter the activation code in the input field.
5. Tap the Activate User Account button.
ÎYou have successfully created your user account.
1
2
3
4
5

12
CZW-250
Putting into Operation
5.3 ADDING NEW DEVICE
1. Tap the + button to add a new device.
2. Then follow the steps displayed in the setup wizard to set up your CZW-250 for initial operation.
ÎYou have successfully added your CZW-250.
1

13
CZW-250
Putting into Operation
5.4 SELECTING NETWORK
1. The WiFi network to which your smartphone is connected is automatically displayed. You can integrate
your CZW-250 in another WiFi network if required.
INFORMATION
For your WiFi to be displayed in the My WiFi Network field, the following requirements must
be met:
•Your WiFi must transmit in the 2.4 GHz frequency range. If your router only supports the 5 GHz fre-
quency range, operation of your CZW-250 is not possible. For more information, see the operating
instructions for your router.
•The location detection (GPS) of your smartphone must be activated.
•The Eurotronic Smart Living 2.0 app requires authorisation to access your location (GPS). Adjust
this setting in your smartphone if necessary. For more information, see the operating instructions
for your smartphone.
2. Enter your WiFi password in the input field. Make sure you spell your password correctly. The app will
not check your WiFi's password. If the password is entered incorrectly, the setup process will still con-
tinue, but the connection to your CZW-250 cannot be established.
3. Tap the Next button.
ÎYou have successfully connected your CZW-250 to your WiFi network.
1
2
3

14
CZW-250
Putting into Operation
5.5 INSERTING BATTERIES
1
2
3
1. Open the battery compartment cover.
2. Insert the batteries provided as shown.
Pay attention to the correct polarity and do not use rechargeable batteries!
3. Close the battery compartment cover. The battery compartment cover audibly clicks into place.
ÎYou have successfully inserted the batteries.

15
CZW-250
Putting into Operation
5.6 TEACHING IN CZW-250
PA appears on the display of your CZW-250 and the wireless symbol flashes. Your CZW-250 is ready to
connect to your WiFi network.
1. Tap the Next button.
2. Tap the Open WiFi Settings button to switch to the WiFi settings of your smartphone.
1
2

16
CZW-250
Putting into Operation
3. Select your CZW-250 in the WiFi settings of your smartphone. Depending on the software version,
your CZW-250 is displayed in the WiFi settings with the designation "Comet WiFi" or "Eurotronic".
4. When prompted, enter the password displayed in the app (from factory 11223344) in the input field
to connect to your CZW-250.
ÎA loading animation appears on the display of your CZW-250.
ÎYour CZW-250 is connected to your WiFi and the app. The process may take a moment.
INFORMATION
During setup, you are briefly connected to the WiFi network of your CZW-250 and a message may
be displayed informing you that you are not connected to the Internet. Confirm this message to stay
connected to your CZW-250 and continue with the setup.
5. Switch back to the Eurotronic Smart Living 2.0 app.
6. Tap the Next button.
INFORMATION
If you are using a CZW-250 with an older software version, a software update will automatically be
carried out after the setup.
3
6

17
CZW-250
Putting into Operation
7. Tap the Next button.
8. Now install your CZW-250 on your radiator (see  Section 5.7 Installing on radiator on Page
18) and tap the Next button.
INFORMATION
If the setup is not completed, ensure the following points:
•Temporarily deactivate the mobile data of your smartphone.
•Activate the location detection (GPS) of your smartphone and allow the app to access it.
7

18
CZW-250
Putting into Operation
5.7 INSTALLING ON RADIATOR
Install your CZW-250 on the desired radiator when indicated by the app.
The CZW-250 can be installed on all known valve bodies (see adapter list at
www.eurotronic.org/service/faq).
CAUTION!:
Burns caused by hot radiator valve!
Touching can cause burns to the hand.
Avoid contact of battery acid with skin, eyes and mucous membranes.
ÎAllow the radiator to cool down before installing, removing or troubleshooting your CZW-
250!
1. Open the current thermostatic head completely. Loosen the fastening and pull the thermostatic head
off the radiator.
2. Optional: Select a suitable adapter from the scope of delivery. For additional information on the adapt-
ers, please see the Section 5.8 Adapter overview on Page 20.

19
CZW-250
Putting into Operation
3. Position your CZW-250 on the radiator and turn the union nut clockwise.
ÎYou have successfully installed your CZW-250.
ÎFollowing installation, start the adaptation, see  Section 5.9 Adapting CZW-250 on Page
22.
INFORMATION
When installing/removing at a later date, please note that your CZW-250 must be in the adaptation
mode. To do this, open the battery compartment cover and remove the batteries. Replace the batteries
after approx. 10 sec. and close the battery compartment cover. Your CZW-250 restarts and is in the
adaptation mode. Ad appears in the display.

20
CZW-250
Putting into Operation
5.8 ADAPTER OVERVIEW
The following overview contains information about the valves and the required adapters. The adapters for
Danfoss RAV, Danfoss RA and Danfoss RAVL are included with your CZW-250. When using the Danfoss
RAV adapter, the RAV pin must be inserted on the valve plunger.
RAV RA RAVLRAV pin
Valve Thread dimension Adapter
Heimeier M30 x 1.5 mm Not required
Junkers Landys+Gyr M30 x 1.5 mm Not required
MNG M30 x 1.5 mm Not required
Honeywell M30 x 1.5 mm Not required
Braukmann M30 x 1.5 mm Not required
Herz M28 x 1.5 mm Required; not in scope of delivery
Comap M28 x 1.5 mm Required; not in scope of delivery
Vaillant 30.5 mm Required; not in scope of delivery
Oventrop M30 x 1.0 mm Required; not in scope of delivery
Meges M38 x 1.5 mm Required; not in scope of delivery
Ondal M38 x 1.5 mm Required; not in scope of delivery
Giacomini 22.6 mm Required; not in scope of delivery
Rossweiner M33 x 2.0 mm Required; not in scope of delivery
Markaryd M28 x 1.0 mm Required; not in scope of delivery
Ista M32 x 1.0 mm Required; not in scope of delivery
Vama M28 x 1.0 mm Required; not in scope of delivery
Pettinaroli M28 x 1.5 mm Required; not in scope of delivery
T+A M28 x 1.5 mm Required; not in scope of delivery
Gampper 1/2/6 M20 Required; not in scope of delivery
Danfoss RA/RAV/RAVL 25.5/30.5/30 mm Included in scope of delivery