VDL (E3) 09/2019 Page 36/234
2.6 Standard Operating Procedures (SOPs)
The operator is responsible to determine the correct auto-ignition temperature of the solvent. To ensure
this, creating Standard Operating Procedures (SOPs) is recommended.
In particular, this should prevent the Residual Risks due to incorrect operation specified in Chap. 1.11
and the exceeding of the auto-ignition temperature of the solvent.
When creating Standard Operating Procedures, take into account the information and instructions in this
Operating Manual. The following are some examples of these risks and suggestions for measures to be
taken. These are to be created, adapted, and supplemented by the operator using the risks determined
and respective conditions at the installation site.
Risk Measures
Operation of the device by
untrained users
• Ensure knowledge of the Operating Manual
• Use only ATEX-trained personnel
• Create operating instruction and standard operating procedures
Use of an unsuitable solvent
with a too low ignition tempe-
rature
Cause: Assumption of wrong
solvent
• Prior to each new drying procedure check again the auto-ignition
temperature with the safety specifications.
•
Clearly label the material to be dried to avoid confusion
Information: There is no risk during the proper drying process, since
this takes place in a vacuum. There is only a risk in the event of prema-
ture air supply (termination of the drying process.
• Avoid premature air supply. Also observe the instructions in the
Operating Manual.
Reloading with the a material
with a lower auto-ignition tem-
perature
• Prior to each new drying procedure check again the auto-ignition
temperature with the safety specifications and the desired drying
temperature. If appropriate, let the chamber cool down before reloa-
ding
Occurrence of a zone outside
the specified area (see Chap.
3.6)
Cause: operating error (e.g.
Falling of the loading material
or of the filled condensate
catchpot of the pump)
• Make sure that the chamber is always disconnected from the power
supply when emptying the condensate catchpot .
• Switch off chamber immediately : disconnect the power plug or use
the customer's explosion-protected emergency stop switch
Termination of the drying pro-
cess due to inadmissible sol-
vent with a too low ignition
temperature.
Ventilation with ambient air or
opening the still hot chamber
Cause: 2 operating errors:
incorrect loading with an in-
admissible solvent; improper
Termination of the drying pro-
cess
• Disconnect the power plug and turn off the pump.
• Let the chamber cool down to room temperature.
• Do NOT remove the “Manual ventilation” plug.
• Only ventilate when the interior temperature has cooled to room
temperature. Only then open the door.
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