Hot melt flow path
Maintenance
5-6
Part 1107600_03
2014 Nordson Corporation
Replacing the Adhesive Filter
AltaBlue TT melters are equipped with a 100‐mesh (0.15‐mm) disposable hot
melt adhesive filter. The adhesive filter removes debris and char from the hot
melt as it flows from the tank. Hot melt flows from the inside to the outside of
the filter, trapping contaminants inside the filter. There is no need to
back‐flush or clean the filter.
When the filter reaches the end of its service life, it should be replaced. The
factors that determine the service life of the filter are:
the type, grade, and purity of the solid‐form hot melt
the set point temperature of the tank
the period of time that the hot melt remains in the tank
The filter should also be replaced when making the change to a different type
or grade of hot melt.
To determine the optimal service life for the filter, monitor and compare the
total number of hours that the heaters are on with observations of:
the purity of the dispensed hot melt
increases in operating pressure
the frequency of gun nozzle replacement or cleaning
As an aid to ensuring that the filter is replaced at the end of its service life, the
melter is equipped with a service LED that turns on at the end of a
customer‐defined time period. Refer to Setting Up the Melter in Section 3,
Installation, for information about the service interval time.
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