Operation Tips To Minimize Charring - Graco InvisiPac Tank-Free HM25 Instructions - Parts Manual

Operation
Operation Tips to Minimize
Charring
Set the Pump Idle Time to System Inactive function
on the System 3 screen to lowest value that will not
interfere with normal operation. This feature automati-
cally disables the heating system if the pump is idle for
longer than the preset amount of time. Disabling the
heating system minimizes adhesive degradation and
limits char formation.
When possible, utilize the Schedule function, see
page 32, to automatically enable and disable the heat-
ing system in accordance with your production sched-
ule. This will ensure adhesive spends as little time at
temperature as possible. Less time at high temperature
ultimately means less adhesive degradation and less
char.
NOTICE
Set melter, hose, and gun to the same setpoint
temperature for best performance. Do not set the
hose temperature higher than the melter. Running
the hose at a setpoint higher than the melter is
unnecessary in this tank-free system and could
lead to adhesive degradation in the hose. Short
adhesive residence time in the melter eliminates
the need to set the melter at a lower setpoint than
other zones.
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