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Main applications

Important Note: Fully compliant with the requirements for heat pumps and thermodynamic water heaters using R290 refrigerant, in accordance with EN 60335-2-40 (Special requirements for electric heat pumps) – Chapter on protection against arc flash and sparks.

General Description:

This thermal cut-out has been designed as a sealed device in accordance with IEC 60079-15:2017.
The thermal cut-out meets the requirements of Clause 9 of IEC 60079-15:2017.
The thermal cut-out has been examined and tested in accordance with Clause 26.5.1.2 of IEC 60079-0:2017 and Clause 11.2 of IEC 60079-15:2017.
The thermal cut-out has passed testing and complies with the relevant sections of IEC 60079-15:2017, as cited by IEC 60335-2-40:2024 and UL 60335-2-40:2022, applicable to equipment using Class A3 refrigerants.

Certification:

- UL: UL 60730-1, UL 60730-2-9, CAN/CSA E60730-1:15, UL/CSA E60730-2-9 (6000 cycles)
- CE: LVD certified by TÜV, EN60730-1, EN60730-2-9 (6.000 cycles)
- Explosive atmosphere: certified by TÜV according to standards and specific chapters above.

Certification test number: CL *********.

Technical features

Housing dimensions: see drawings

Capillary: Copper, capillary length 500 or 900 mm. Black PVC sleeve on capillary. Capillary minimum bending radius 5 mm.

For technical reasons, we do not recommend to use capillary length longer than 900 mm. We don’t recommend 500mm long capillary for calibration temperature above 90°C (194°F)

Special lengths on request.

Bulb: Copper, corkscrew type for temperatures from 70 to 130°C (158 to 266°F).

Straight uncoiled capillary available on request

Temperature sensing element: Liquid-filled thermostatic assembly whose boiling causes tripping of the contact.

Therefore, unlike liquid filled systems, these thermostats are sensitive to atmospheric pressure, and their reaction time is faster.

Terminals: Six 6.35 x 0.8, vertical quick connect terminals, epoxy sealed

Adjustment: Fixed setting

Mounting: rear bracket for 2 screws dia. 4mm, 60mm distance

Manual reset: Fail safe action, by waterproof front access button

Contacts: 3 poles single throw, 3 x 25A 250V, 3 x 20A 400V snap action, double break contacts.

Max ambient temperature on head: 85°C (185°F). Must not be higher of 10°C (18°F) than calibration temperature

Acceptable degree of pollution for use in 250V: 2

Acceptable degree of pollution for use in 400V: 2

Option: the spiral capillary in the shape of a bulb of dia. 6mm can be replaced by a tubular phial, but then the thermal response time is greatly increased.

Important safety note: Due to the presence of electrical connections near the reset button, disconnect the power supply before accessing it.