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Safety Instructions


Feb 10, 2017    |     For the safe operation of ESK products please read and observe carefully the respective assembly and operating manuals. ESK components and pressure vessels are exclusively used for cooling systems. They correspond to the EC pressure equipment directive 2014/68/EU. Operation is only permitted if the installation was carried out in accordance with legal regulations.

  • Any components and accessories are provided for the maintenance, installation and use by professional and qualified assemblers, installers and operators. They must have comprehensive knowledge on cooling technology, refrigerants and cooling machine oils. Any work at the components requires specialist knowledge and shall therefore only be carried out by trained and instructed staff.
  • The inappropriate installation or misuse of the device may result in material damages or personal injury.
  • For the safe functioning the assembly instructions and usage limits (pressure, temperature, media) must be adhered to.
  • When using high viscosity refrigerant oil > 46 cSt, the correct function of the components must be controlled and monitored during operation. Where applicable, corrective measures must be taken.
  • Before filling the cooling system with refrigerants, a leakage test of the system as well as of the mounted ESK components must be performed. No oxygen may be used in pressure tests.
  • For the maintenance of refrigerants and cooling machine oils and performance of works on the filled cooling circuit the corresponding accident prevention regulations must be observed.
  • The relevant environmental regulations must be observed when disposing of old oils or refrigerants.
  • All works on ESK products must only be performed in pressure-free and cooled condition. This is specifically valid for the opening of the devices or dismantling of components.
  • Use only ESK spare parts for servicing.

    • During operation severe risk of injury may exist when surface temperatures are within a range of - 40° … +140°C.
    Electrical connections may only be performed by specialist staff.
    Before opening the device, always disconnect the device from the main power supply.
    The electrical connections must be protected against humidity.


    Operation with refrigerants R744 / CO2 (carbon dioxide)
    ESK produces components for sub- and transcritical running. The refrigerant is colorless and odorless, and is not noticeable upon discharge. Inhaling elevated concentrations can lead to unconsciousness and suffocation. Ventilation of the machine rooms must be carried out in accordance with EN 378.
    The high pressure condition of CO2 is dangerous and must be observed. In case the system stops the pressure elevates significantly at the ambient temperature and there may be danger of burst. The critical point is 31°C and 74 bar. Parts of the plant that can be blocked must be equipped with a safety valve (EN 378-2 and EN 13136.)

    It is not allowed to connect a tube to the safety valve, in order to avoid blockage due to dry ice accumulation during opening.
      
    Operation with flammable refrigerants
    There is an increased risk of light inflammability, toxic effect and explosiveness. Refrigerant-specific knowledge as well as strictly keeping the safety regulations are fundamental requirements for the production and operation of such systems.

    Only components shall be used that have been constructed and released by ESK for such installations and/or operations.

    For the production, operation, and service of refrigeration plants with inflammable refrigerants, special regulations come into force. Precautions must be taken so that, upon discharge of refrigerant, a safely ventilation is guaranteed, in order to avoid the development of an ignitable gas mixture. The following standards describe e.g. regulations regarding the execution of systems: EN 378, DGUV 100-500 ch. 2.35


    Returning of components
    When returning components the devices must be exhausted completely by the return sender.
    The devices are delivered without oil and refrigerants and in an appropriate packaging.



    Beware: Pressurized components of level controls and regulators within cooling systems
    Please observe that despite of system standstill components for the level control and regulation can still be under pressure.
    The highlighted components are pressurized, opening is thus only allowed in pressure-free condition.
    Components that can be dismantled in operation are the coil of the solenoid valve (4) and the electronic module (5).




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    please refer to the following documents:
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