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General Rules for Installation:
Important Note:These thermostats are intended to monitor or control temperatures in gas or dust hazardous areas. For gas hazardous areas, this equipment is approved as "Ex-eb db" and is suitable for use in zone 1 and zone 2, gas group IIC (Hydrogen/Acetylene, the highest protection group), with a temperature classification T6 ;
For dust hazardous areas, this equipment is approved as "Ex-tb", suitable for use in zone 21 and zone 22, the dust group is IIIC (electric conductive dust, the highest protection group), with ambient temperature limits on its body from -25°C to +80°C. The thermostat, box and terminal block assembly is an inseparable unit.

Ambient temperature on the enclosure must stay between -25 and +70° C but may also be limited by the maximum ambient temperature allowed on the temperature sensing element (See the parts numbers table). The temperature sensing element is located inside the aluminum enclosure, on the back side. Therefore, the response time is quite long. If this enclosure is mounted on a wall, we recommend to increase the gap between the backside and the wall to 20mm, to increase air circulation. Two extension washers of 20mm are supplied in standard for this use
Approvals: These thermostats are certified: Atex: TÜV 22ATEX 8893 X ; IECEx: TUR 22.0058X ; CCCEx: ??????

Housing: aluminum, 140 × 110 × 90mm (Dimensions without cable glands), epoxy painting, RAL7035 (thickness less than 0.2mm).

Temperature sensing element: liquid expansion principle, oil filled. Temperature sensing element is located inside the aluminum enclosure, on backside
Electrical connection: On built-in junction block, for conductors of 0.5mm² to 4mm², screw terminals. 5 terminals for neutral and line, including jumpers between input and output for neutral. There are also 2 ground terminals M4 inside and 2 outside the enclosure.

Cable glands: One or two M20 metal cable glands can be used for cable from 3.5 to 12mm. There is a cable locking saddle inside the enclosure, at each cable gland input. It allows the grounding of the braid if braided cables are used.

Adjustment: With knob printed in °C (°F on request). Adjustment is possible only after removing the cover, and when the electrical supply is powered off.

Mounting: Wall mounting, by 2 holes dia. 6.5 mm at 100mm × 95mm distance. The housing rear side also includes

four M4 threaded holes 36.5 × 75mm distance for mounting metal brackets and feet providing offset wall mounting, pole or pipes mounting (see the accessories in the last part of this catalog)
Contacts: SPDT (snap action contact)
Electrical rating: Suitable for power control, remote control of relay coils or PLCs circuits, and direct power switching.

These devices use silver contacts or silver alloy contacts. Due to the possible oxidation of the contacts in time, we do not recommend the use of AC or DC low-voltage circuits (24V or less) if the switched intensity is less than 100mA, or the switched power less than 800mW. Contact us for those applications that require gold-plated contacts. The electrical ratings given are normalized resistive circuit values.

Mechanical life:> 500.000 cycles
Options: These enclosures can receive thermostats with setpoint screw driver adjustment (Type 97KAC) or with sealed fixed setting (Type 97KAF). See pages of thermostats without enclosure for more information.

Gas classification:
      II 2G Ex eb db IIC T6 Gb
Dust classification:
      II 2D Ex tb IIIC T80°C Db
Certificates:
ATEX: TÜV 22 ATEX 8893 X
IECEx: IECEx TUR 22.0058 X