QWZ-RAD

Qbus wireless Zigbee thermostatic valve for radiators

Name: Glue digital agency
Price range: $

Zigbee wireless connection: Wirelessly connects to the Qbus system via the QWI/ZB interface (sold separately)
Smart wireless temperature control per radiator
Multizone heating possible using multiple radiator valves
Energy-efficient LED display shows the temperature when in use and when turning the control knob
Protection features such as open window detection, antifreeze mode, and child lock
Long battery life (±1 year)
Wide compatibility: standard M30 x 1.5 thread + adapters included for Danfoss, Giacomini, and Caleffi

Technical info Control

The QWZ-RAD is a wireless motorized radiator thermostat that can be linked to the Qbus Wireless Interface with Zigbee protocol (QWI/ZB).

The radiator thermostat has a round rotating and push button for adjusting the temperature. The temperature is easy to read thanks to the energy-efficient LED display.

Multiple QWZ-RAD units can be installed in the same home, allowing you to easily create a multi-zone heating control in situations where a wired solution is not possible, feasible, or desirable.

Frequently Asked Questions

How do you read an existing configuration?
This is a completely different procedure depending on the type of controller.
For the CTD controllers this goes as follows:
In the SMIII via "File" or "Utilities / Setup / SD card", click on "Recover QDB from SD".
After confirmation you choose the name and location where the file should be saved. The zipped QDB file is then read from the SD card of the CTD and saved. With a positive answer to the question "Unzip and open restored QDB?", All data will then be immediately available. If the data you were still working on was not sent or saved, you will first receive a notification to do so.

For a CTL controller follow the following procedure:
Because this controller does not yet have a large memory, only limited data can be recovered. Ao the names are abbreviated to 12 characters and serial numbers are not stored anywhere.
The first step is therefore to type in ALL serial numbers via SMII via "File / Modules". These 6-digit serial numbers can be found on every module (DIN rail, switch, detector, etc.). For the SWC0x switches, an extra option was provided to have them send their serial number via “Search for modules”.
When you then click on the "down arrow", you can read all this limited information.
Always use the latest software for configuration.

It is always recommended to use the most recent version. This version supports the newest modules and resolves all known bugs.
If, for example, you enter a serial number and the correct module information does not appear, you are likely not working with the most recent software.
A newer version will always be able to open the older files (.QDB) without data loss.
The latest version of the System Manager software, along with the user manual and version history, can be found in the knowledge center.

Control

Operations via Qbus Control

Thermostat
Through System Manager, you can assign a Thermostat output to any contact of this module. You can then easily control this thermostat with Qbus Control.
At the bottom, you can choose a regime, which are a number of pre-set temperatures. You can also choose to set the temperature yourself by swiping up/down.
On the left side, you see the measured temperature, on the right side the set one.
With the graph symbol in the top right corner, you can view the historical data.
24 hours: Here you see the status of this I/O for the last 24 hours. The line shows you the trend of the measured temperature, the bars show the set temperature.
7 days: Here you see the status of this I/O for the last 7 days. The line shows you the trend of the measured temperature,
30 days: Here you see the status of this I/O for the last 30 days. The line shows you the trend of the measured temperature,

Technical info for installers

Function description

The QWZ-RAD is a wireless motorized radiator thermostat that can be linked to the Qbus Wireless Interface with Zigbee protocol (QWI/ZB). This allows you to easily create a multi-zone heating control in situations where a wired solution is not possible, feasible, or desirable. A multi-zone heating control typically results in a 30% saving. Thanks to the connection with the Qbus controller via the QWI/ZB, numerous applications and configurations are possible. This enables the use of various control options within the Qbus system, as well as online with, for example, Qbus Control. Multiple QWZ-RADs can be placed in the same zone. The radiator thermostats in the same zone are synchronized by the Qbus system to achieve uniform and straightforward operation and control.
The radiator thermostat (QWZ-RAD) is easily operable and configurable with the round rotary and push button. An energy-efficient LED display is integrated so that the selected temperature is readable during operation. The QWZ-RAD is powered by 2 replaceable AA batteries. Under normal conditions and average use, you only need to replace the batteries once a year. You can mount the QWZ/RAD on valves via the M30 x 1.5 nut. Three adapters are also included for mounting on Danfoss (RA), Giacomini (1/2” + short extension), and Caleffi (1/2”) valve bodies.
Technical specifications
General Specifications
Power Supply: 2 AA batteries (do not use rechargeable batteries)
Battery lifespan under normal use: 1 year
Temperature accuracy: 0.5 °C
Room temperature display range: 0–50°C
Room temperature control range: 5-30°C
Storage environment temperature: -10°C to 60°C
Display: LED
Frequency: 2.4GHz
Wireless communication protocol: Zigbee
Maximum humidity: 93%, no condensation
Maximum installation height: 2,000 meters above sea level
Zigbee RF Signal Distances from QWZ-RAD to the Next Active Participant
Inside building and same floor: 15m for normal masonry.
Inside building different floor: 10m for normal masonry
Open air: 50m
Physical Specifications
Protection grade: IP21
Dimensions: 94x55x55 mm
Standard connection M30x1.5mm
CE Marking
Qbus declares that this product complies with all applicable European directives and regulations.
The EU declaration of conformity can be consulted on our website www.qbus.be.
Protection functions

The following features are incorporated into the control of the thermostatic radiator valve:
1 Open window detection:
If the room temperature drops by 6°C within 4 minutes, the valve will interpret this as an open window and will close. Only when the temperature rises 2°C again, the valve will resume functioning.
2. Anti-blocking:
To prevent the valve body from seizing due to scaling, a built-in safety mechanism is provided. If the radiator valve has not been operated for two weeks, the QWZ-RAD will open and close the valve for 30 seconds. During this operation, "AS" (Anti-scaling) will display. Afterwards, the QWZ-RAD will return to normal operation.
3. Child lock:
You can lock the control for child protection or to prevent other unwanted operations.
Set the desired temperature by gently turning the knob. Press and hold the knob (+/-10s) to lock the control. The desired temperature can still be adjusted via the Qbus controls.
Press this button again for more than 10 seconds to unlock.
4. Alarm "Low Battery Power":
When the battery level is very low, the battery symbol will be displayed: To ensure proper operation, replace both batteries immediately.
5. Anti-freeze function
If the QWZ-RAD is in "OF" status, and the room temperature drops below 5°C, the valve will open. The flame symbol will be displayed.
If the temperature rises above 8°C and the valve is still in "OF" status, the QWZ-RAD will close the valve again.
6. Malfunction
If the temperature sensor is defective, the text “Er” will appear. The actuator will no longer function and must be replaced.
7. Switching delay:
To protect battery life, the valve will respond with a delay to a changed temperature request. After adjusting the requested temperature, the QWZ-RAD will wait briefly before implementing the change.
Explanation of Symbols

Equipment where protection against the risk of electric contact is not only based on basic insulation but also on additional protection such as double insulation or reinforced insulation. There is no possibility for grounding.

Before connecting the device, it is mandatory to read the manual of the respective product. ISO7000-0434

Power supply connection (230V) to the power supply connector. IEC 60417-5036

CE conformity. All declarations of conformity are available upon request.
Warranty Provision

Standard Warranty Period: 2 years from delivery date.
The warranty is no longer valid if the module has been opened!
Defective modules should be sent without seal along with a description of the defect to our service department:
QBUS N.V.
Joseph Cardijnstraat 19
9420 Erpe-Mere
Belgium
T +32 53 60 72 10
F +32 53 60 72 19
Email: support@qbus.be

General

Safety regulations
Read the full manual before installing and activating the module.
ATTENTION
The device should not be opened except as described for battery replacement. The warranty is void if the module is mishandled.
Remove depleted batteries to avoid damage from defective batteries and recycle according to local regulations.
Use appropriate batteries of the same brand and production date.
Do not apply pull force on the rotary knob.

Installation and wiring

Installation
First, insert two AA batteries. To do this, remove the casing by gently pressing the designated button on the side of the casing and sliding it away from the faucet body. When inserting the batteries, check the polarity by considering the markings on the thermostatic valve, and then replace the casing.
After inserting the batteries, the thermostat valve display will show “LA.” The QWZ-RAD now starts a calibration. This process can take several minutes. Eventually, the actuator pin will be fully recessed into the housing.

Ensure that the valve stem is flush with the valve body on the radiator prior to installation, as indicated in the diagram. Attach the thermostatic valve with M30*1.5 threads to the radiator's valve body. Use the supplied adapters if necessary. A new calibration may begin, after which the display will turn off.
Power Supply

Power supply: 2 AA batteries (do not use rechargeable batteries)

Installation

Mounting Danfoss
Slide the adapter into place
Insert the screw and the nut into the adapter
Tighten the screw without deforming the adapter
Screw the M30*1.5 onto the faucet
Mounting Caleffi
Click the adapter onto the faucet body.
Screw the M30*1.5 onto the faucet.
Mounting Giacomini
Click the adapter onto the faucet body.
Place the spacer onto the pin of the actuator.
Follow these steps first before assembling the

Qbus System Manager III Manual Update 04 2025 pdf image 443

Likewise as the QWZ-REL02/230, this module can be connected in a similar way

Qbus System Manager III Manual Update 04 2025 pdf image 444

In the example above, the module was linked perfectly and was assigned address 0x5B98.
Unfortunately, the RSSI value is sometimes incorrectly displayed for this type of modules. “(---)” will sometimes be shown incorrectly.

When assigning a Thermostat I/O, it is important to also indicate whether this thermostatic valve should work as a temperature sensor.
When you check the “TH -> CTD” button, this module will transmit its measured temperature to the controller. This option may only be enabled on 1 module!

A Thermostat I/O may be assigned to different thermostatic valves. These will all follow the same temperature setting.

Please note: If the thermostatic valve is manually set to the 'OF' position, it will no longer listen to new desired temperatures.

Qbus System Manager III Manual Update 04 2025 pdf image 446

As shown in the figure above, “Read values” displays the measured temperature as well as the current program, the desired temperature and the status of the thermostat outputs.

After confirmation, the 'Remove from network' button will send the command to the wireless network to disconnect the module from the wireless interface. Even if the module could not be reached, the short address will be removed from the list of connected modules so that the I/O on that module can no longer be controlled.