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Type 8Z
Type 8Z
Type 8Z
1, 2, 3-pole manual reset limiter. Fixed setting. Comply with IEC 60079-0, IEC 60079-15. To use when R290 highly flammable refrigerant classed A3 upon ISO 817 may be present. This is not a Ex certified product. Maximum rating 20 (3.3)A 250V, 16(2.6)A 400V Waterproof. Calibration from 70°C to 130°C
Controls and Safety
Explosion-proof
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product presentation

Main applications
General rules for installation:
Important note: Fully compliant for heat pumps and water heater heat pumps using R290 refrigerant according to EN60335-2-40 (Particular requirements for electrical heat pumps) – Arcs and sparks protection chapter.

General description:

This Thermal Cut Out was designed as a sealed device as per lEC 60079-15:2017.
The Thermal Cut Out met the requirements of lEC 60079-15: 2017 clause 9.
The Thermal Cut Out was examined and tested according to clause 26.5.1.2 of lEC 60079-0: 2017 and clause 11.2 of lEC 60079-15: 2017.
The Thermal Cut Out passed the test items, complies with the relevant clauses of lEC 60079-15: 2017 cited by lEC 60335-2-40: 2024 and UL 60335-2-40: 2022, applicable to appliance with A3 refrigerants.

Certification:

- UL: UL 60730-1, UL 60730-2-9, CAN/CSA E60730-1:15, UL/CSA E60730-2-9 (6,000 cycles)
- CE: LVD certified by TÜV, EN60730-1, EN60730-2-9 (6,000 cycles)
- Explosive atmosphere by TÜV according to standards and specific chapters above.
- Registration No.: CL 50710811 0001

Technical features

Housing dimensions: see drawings

Capillary: Copper, capillary length 250mm, 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 250mm 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 × 0.8 quick connect terminals, or 6 M4 input screw terminals with saddle. (Other terminals combinations are possible). Terminals can be horizontal or vertical

Adjustment: Fixed setting

Mounting: Front bushing, with M10 × 1 thread

Manual reset: Fail safe action, front access button

Contacts: 3 poles single throw 20(3.3)A 250V, 16(2.6)A 400V snap action contact. Single pole and double pole available with same dimensions.

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

Acceptable degree of pollution for use in 250V: 3

Acceptable degree of pollution for use in 400V: 2