Hypertherm Koolant Koolers N-Series, User Manual, Page: 52 / 77

Maintenance ‐ Replacing the Particulate Filter Cartridge
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6. Schedule planned maintenance services.
Consult the factory to schedule and perform planned maintenance services on the chiller by qualified
refrigeration technicians.
10.2 Replacing the Particulate Filter Cartridge
The chiller’s process circuit is equipped with a particulate filter. Although this prolongs the lifespan of the
Chiller, the filter cartridge will eventually deplete. The chiller monitors when the cartridge is no longer
functional and will display a warning on the controller. If this warning occurs the cartridge must be replaced
according to the following steps:
1. Shut the chiller down by turning the Local/Off/Remote Switch below the controller to the “O” position.
2. Access the chiller’s air intake/filter side (refer to section 6.4 Internal Access).
3. Locate the particulate filter refer to Figure 41.
4. Carefully unscrew the sump of the filter using the provided filter wrench (typically stored in the inside
door pocket of the electrical enclosure when shipped). The sump will be full of coolant when removed.
5. Remove and discard the depleted filter cartridge and empty the sump of coolant.
6. Reinstall a new filter cartridge into the sump.
7. Reinstall the sump with the new filter cartridge taking care to ensure the sump o ‐ ring is properly seated.
8. Tighten the filter sump using the filter wrench.
9. Reinstall the air intake filter(s) before restarting chiller.
Hypertherm, Inc. Part Number: 810540