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Product description
2.2 Ignition protection concept
In accordance with Directive 2014/34/EU, GEA ATEX compressors are suitable for use in device
category 2 for explosive gas atmospheres up to temperature class T3 and explosion hazard subgroup
IIB
/
IIC.
The entire compressor, including motor, is perceived as technically tight and therefore does not need
an ignition protection.
To prevent ignition risk caused by working materials also during system malfunctions, all used work-
ing materials have to meet the requirements for the temperature class of the compressor. The surface
temperature of the compressor may not exceed 80 % of the ignition temperature of the working
material. For this reason all working materials need to have an auto-ignition temperature of > 250 °C.
To protect against high temperatures that may occur during incorrect operation or faults at the com-
pressor, the areas with the highest heat potential are controlled with temperature sensors (Ex b).
The installation of the electronic control unit INT69 EX2 and the safety barrier,
both included in the scope of supply, is therefore absolutely necessary.
The connection areas for load circuits are designed according to the requirements of the appliance
category in Ex e. The circuits for the temperature sensors of the used ignition source control Ex b have
to be intrinsically safe to prevent inadmissibly high thermal or electric values. To ensure the intrinsic
safety, the included safety barrier has to additionally be integrated in the electric circuit according to
this assembly instruction. The terminal board is designed for the protection type Ex de. The whole
electric connection area is protected by a housing that complies with the requirements for the protec
-
tion type increased safety (Ex e).
The scope of delivery of the standard compressor comprises a conductive paint finish, that is suitable
for the use in explosion group IIC. If the compressor is delivered with the accessory "Offshore Paint
Finish", the application is restricted to explosion group IIB.
