Replacing The Filter; Monitoring The Life Of The Filter - Nordson ProBlue P4 Customer Product Manual

5-6
Maintenance

Replacing the Filter

Filter location
Hot melt flow path
Part 1024496_06
ProBlue melters are equipped with a 100‐mesh (.15 mm) disposable hot melt
filter. The 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:
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the type, grade, and purity of the solid‐form hot melt
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the set point temperature of the tank
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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:
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the purity of the dispensed hot melt
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increases in operating pressure
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the frequency of gun nozzle replacement or cleaning

Monitoring the Life of the Filter

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. You can use this feature to alert you when it is
time to change the filter. Refer to Section 3, Setting Up the Melter, for
information about the service interval time.
When the service LED turns on, replace the filter, and then press the
Clear/Reset key to reset the timer and turn off the service LED.
NOTE: The melter must be in the automatic scan mode when you press the
Clear/Reset key.
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