11. Maintenance
11.1 Procedures
11.1.1 HEPA/SAFETY Filters: Periodically, these filters should be inspected and replaced. Condition of the HEPA/SAFETY filter will generally be a function of the Magnehelic gage (for the HEPA/SAFETY filters – NOT the cartridge filters) reading. To examine: • Remove the two wing nuts for each filter • Lift off the filter “tie down” bar • Remove HEPA/SAFETY filters • Install new HEPA/SAFETY filters • Install HEPA/SAFETY filter “tie down” bar • Install the two wing nuts for each filter. 11.1.2 Cartridge Filters: The cartridge filters will need to be replaced periodically. The frequency varies from a few weeks to a few years, depending on factors such as density of fumes/dust, particle size, humidity of air, oil or grease contents of matter, etc… To change out:
11.1.2.1 Rotate the Cartridge Access Lid Handle to the up position. (Picture 1).
Handle
Access Lid
Gasket
Picture 1
11.1.2.2 Carefully remove the Cartridge access lid by lifting it up, then off. Set the lid aside where it will not be damaged. Inspect the gaskets and hardware on the lid and replace parts as necessary. (Picture 1).
Picture 2
11.1.2.3 Slide the filter out of the machine. Depending on the Model, remove the
second filter from the filter rack as required. (Picture 2).
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