Description
STT-868 wireless electric actuator allows the user to easily and effi ciently
manage the temperature in particular heating zones of a building. The system
controlling the actuator ensures optimum heating comfort and contributes to
signifi cant energy saving. This type of actuator may be used in heating systems.
It is compatible with such controllers as EU-WIFI 8S, EU-L-8, EU-8S etc.
Technical data
Output – M30x1,5 nut
Communication – wireless
Frequency 868MHz
Power supply – 2x AA 1,5V batteries –
it is advisable to use high volume batteries
(over 2500mAh).
How to register the actuator
In order to register the actuator in a given zone, select <Registration> in
the main controller (see: instruction manual of the device) and press the
communication button.
Release it and observe the control light:
- if the green light fl ashes twice, it indicates successful registration
- if the red light goes on for a while, it indicates registration failure - it is
necessary to conduct registration again.
NOTE
If you press the communication button and the control light does not fl ash, it
means that the actuator motor is still working. Wait until it stops.
How to install the actuator
Follow these steps while installing the device:
1. Insert the batteries. The actuator moves into mounting position making it
easier for the user to screw it. Once the actuator is in mounting position, the
control light fl ashes green. The actuator remains in mounting position for 2
minutes.
NOTE
Depending on settings, it may take the actuator even 1,5 minutes to get into
the mounting position.
2. Screw the actuator to the radiator. Actuator calibration is initiated after
pressing the button or automatically after 2 minutes.
How to replace
batteries
1. Remove the cover
2. Remove the batteries
3. Press the communication button in order to
release the residual electricity
4. Insert new batteries
NOTE
Always use two new batteries of the same
brand.
Registration in mounting position
When the actuator is in mounting position, select <Registration> in the main
controller (see: instruction manual of the device) and hold the communication
button until the control light changes from green to red.
Connectivity test
In order to check the connection with the main controller, press the
communication button and hold it until the control light fl ashes twice. Release
the button and observe the control light:
- if the green light fl ashes twice, it indicates successful communication
- if the red light goes on for a while, there is no connection with the main
controller.
Connectivity test enables the user to identify the controller and the zone in
which a given actuator is registered. The main controller displays appropriate
message.
How to reset the actuator
In order to reset the actuator, press the communication button and hold it until
the control light fl ashes three times. Release the button and the actuator will
move to mounting position. Press the button or wait 2 minutes - the actuator
will reset. It is not necessary to register the actuator again.
Installation with Danfoss valve
1. Danfoss RAN (click) or RTD-N valve
2. Valve pressure pin
3. Pressure pin cap
4. Danfoss RAN (click) or RTD-N adapter
5. STT-869 actuator
It is necessary to put the cap on the valve pressure pin if we want ST-869 and
Danfoss valve to work properly.
Main controller alarms connected with actuator operation
If the main controller supporting STT-869 actuator informs about one of the following alarms, follow the steps described in the table below:
Type of alarm Possible cause How to fi x it
Error #1 - Calibration error 1 – Moving the
screw to the mounting position took too
much time
- The limit switch sensor is damaged - Call the service staff
Error #2 - Calibration error 2 – The screw
is maximally pulled out. No resistance
while pulling out
- The actuator has not been screwed to the valve or has not been
screwed completely
- The valve stroke is too big or the valve dimensions are not typical
- Actuator current sensor is damaged
- Check if the controller has been
installed properly
- Replace the batteries
- Call the service staff
Error #3 - Calibration error 3 -
The screw has not been pulled out enough
- the screw meets resistance too early
- The valve stroke is too small or the valve dimensions are not typical
- Actuator current sensor is damaged
- Low battery level
- Replace the batteries
- Call the service staff
Error #4 - No feedback - The master controller is switched off
- Poor range or no range in the master controller
- Radio module in the actuator is damaged
- Turn on the master controller
- Reduce the distance from the master
controller
- Call the service staff
Error #5 - Low battery level - The battery is fl at - Replace the batteries
Error #6 - Encoder is locked - The encoder is damaged - Call the service staff
Error #7 - To high voltage - Unevenness of the screw, the thread etc. may cause excessive resistance
- Too high resistance of gear or motor
- Current sensor is damaged
- Call the service staff
Error #8 - Limit switch sensor error - Limit switch sensor damaged - Call the service staff
EU DECLARATION OF CONFORMITY
Hereby, we declare under our sole responsibility that STT-869 room
regulator manufactured by TECH, headquartered in Wieprz Biała Droga
31, 34-122 Wieprz, is compliant with:
• Directive 2014/53/EU of the European parliament and of the
Council of 16 April 2014. on the harmonisation of the laws of the
Member States relating to the making available on the market of
radio equipment;
• Directive 2009/125/EC establishing a framework for the setting of
ecodesign requirements for energy-related products;
• the regulation by the Ministry of Economy of May 8, 2013
‘concerning the essential requirements as regards the restriction of
the use of certain hazardous substances in electrical and electronic
equipment’, implementing provisions of ROHS directive 2011/65/
EU.
For compliance assessment, harmonized standards were used:
PN-EN 60730-2-9 :2011 par. 3.1a Safety of use ETSI EN 301 489-1
V2.1.1 (2017-02) par.3.1b Electromagnetic compatibility ETSI EN 301
489-3 V2.1.1 (2017-03) par.3.1 b Electromagnetic compatibility ETSI EN
300 220-2 V3.1.1 (2017-02) par.3.2 Eff ective and coherent use of radio
spectrum ETSI EN 300 220-1 V3.1.1 (2017-02) par.3.2 Eff ective and
coherent use of radio spectrum
Wieprz, 17.08.2018
Control light
1. Danfoss RAN (click) or RTD-N valve
Communication button
