Engineering manual - SAB 193-233-283 S A-frame (including ATEX)
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008831 en 2022.02
Safety precautions
3. Safety precautions
This chapter provides general safety precautions for the equipment. Additional safety precau-
tions relating to specific tasks are given in specific documents.
The safety precautions are intended for all users.
3.1 Areas of application
3.1.1 Application of the screw compressor
To prevent unintentional application of the compressor, which could injure personnel or dam-
age equipment, the following must be observed:
• The compressor must only be used as a refrigeration compressor and within the oper-
ating limits specified in the manuals or in a written agreement with Johnson Controls
Denmark.
• The compressor must only be used with the refrigerant (s) and number of revolutions
per minute, shown on the compressor name plate. Other refrigerants must only be used
in accordance with Johnson Controls Denmark's instructions. All other types of gas
must only be used with a written permission from Johnson Controls Denmark.
• The unit must not be installed in areas where the relative humidity (RH) may exceed
90%.
• Johnson Controls Denmark further accept no liability of any kind for damage to com-
pressor unit and plant parts caused by torsional oscillation, or the like, which is attribut-
able to built-in VSD solutions initiated by the customer after delivery.
• ATEX: The compressor is approved for application in potentially explosive atmos-
pheres provided it is fitted with explosion-proof equipment. If it is ATEX approved, there
will be an EX name plate fixed on the unit. Please note that special non-sparking tools
must be used for all maintenance work on the compressor.
The compressor must NOT be used:
• to evacuate the refrigeration plant of air and moisture
• to put the refrigeration plant under air pressure in view of a pressure testing
• as an air compressor.
3.1.2 Application of combustion engines
According to EN 378/ISO 5149, no other machinery should be installed in a refrigeration ma-
chine room. Some refrigerant types may, to a certain extent, be absorbed by the fuel in a com-
bustion engine, and when the contaminated fuel reaches the fuel pumps, the refrigerant will
“flash out” (separate) and react on the increased temperature and pressure by creating acids,
which will destroy the pumps. However, check with the local authorities as exemptions to this
rule may be granted.
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