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Main applications
Temperature control and two poles cut off on hot water tanks, including flat tanks, electric radiators, electro-thermal heating equipment.

Technical features

Housing dimensions: 50 × 42 × 30mm (Without adjusting shaft, terminals, bulbs and capillaries)

Capillary of the fail-safe reset: Copper, capillary length 250mm, 500 or 900mm. Black PVC sleeve on capillary. Capillary minimum bending radius 5mm.

For technical reasons, we do not recommend to use capillary length longer than 900mm. We don’t recommend 250mm long capillary for calibration temperature above 90°C (194°F)

Special lengths on request.

Bulb of the fail-safe reset: Copper, corkscrew type for temperatures from 60 to 212°C (140 to 414°F).
Straight uncoiled or half length bended capillary available on request

Temperature sensing element of fail-safe diastat: Liquid-filled thermostatic assembly whose boiling causes tripping of the contact. Therefore, unlike liquid expansion systems, these thermostats are sensitive to atmospheric pressure, and their reaction time is faster than liquid filled diastats. Copper capillary.

Measuring element of the temperature control diastat: Liquid-filled thermostatic assembly, the expansion of which triggers the contact. Bulb and capillary in stainless steel, with transparent PVC sleeve. As standard, the two capillaries have the same length and the two bulbs have the same diameter. Different lengths on request.

Terminals: Four 6.35 × 0.8 quick connect terminals, or two M4 input screw terminals and two 6.35 × 0.8 quick connect terminals for connection to heater. In the model with one auxiliary close on rise terminal, this output connection is mandatory 6.35 × 0.8 tab.

6.35 × 0.8 tabs can have different bending angle. References on request. (MOQ apply)

Adjustment: Fixed setting for manual reset safety, adjustment by 6mm shaft with 4.6mm flat, standard length 11.5mm for the temperature control thermostat (Other possible lengths: 14, 20, 25mm on request)

The temperature control shaft is available with 180 or 270° mechanical angulation

Mounting: 2 M4 screws, 28mm distance

Access to manual reset: By freely accessible push button or by push button protected by a non-protruding M10 plastic cap (optional). Access to the push button is possible after removing the set point adjustment knob if its diameter covers the hole

Contacts: Double pole single throw 20A 250V snap action contact for the fail-safe and 20A 250V single pole single throw for the temperature control. In option: 1 close on rise auxiliary contact on the line terminal of fail-safe contact.

Max ambient temperature on body: 115°C (239°F). Must not be higher than calibration temperature of fail-safe contact minus 10°C (-18°F)

Acceptable degree of pollution for use in 250V: 3

Not to be used in 400V