Operating Instructions STBW 225
May 2022
Seite 2
Kinking and cutting through the sensor lines leads to permanent failure of the device. Filling
liquid can escape if the measuring system breaks. This one isn't dangerous, isn't it irritant, non-
hazardous to health and non-toxic.
The housing may be opened for the electrical connection and parameterization. Inside the
housing there are circuits that are dangerous to touch. The device may only be operated by
personnel who have been authorized and instructed to do so by the system operator. The
applicable standards and guidelines must be observed. The EMC guidelines for the entire
system must be guaranteed.
2. Intended Use
The safety temperature limiters and temperature monitors are only intended for commercial use.
The devices are used for the following purposes:
- For supply air monitoring and as a limiter for electric air heaters and heating registers
- Please also note our information S 20 and A 1999.
- When used in air ducts, a protective coil or immersion sleeve must be used.
- The protective coil has a flange for direct attachment in the air duct. The regulator itself can
be installed later. The controller head is fastened with the screws in the fastening set.
screw and plate by clamping them onto the protective coil (see Fig. 1).
Intended use also includes the following points:
- The instructions in this manual must be observed and followed.
- The technical limit values (see chapter 6 "Technical data") must be observed.
- The probe is to be used exclusively for measuring air
- The devices are not suitable and intended for use in explosive or pressurized areas.
The manufacturer accepts no liability for any resulting damage in the event of improper use, unauthorized
modifications, non-compliance with these instructions or the use of unqualified personnel. The manufacturer's
warranty also expires.
3. Standards and Guidelines
The device conforms to the following requirements:
- DIN EN 14597 temperature control devices and temperature limiters
- DIN EN 60730 Automatic electrical regulation and control devices
4. Function
If the set temperature is reached, the capillary sensor switches the microswitch and the heating contact 1 – 2
opens. Contact 1 – 4 closes. The heating circuit is switched off. In the event of a sensor break, contact 1 - 2 is
permanently opened and contact 1 - 4 is permanently closed in the STB / TW application. Unlocking is no
longer possible with the STB (intrinsic safety).
TW
(Temperature Monitor) = internal setting
STB
(Safety Temperature Limiter) = internal setting, internal reset