Maintenance
5-8
Part 1128350_02
E 2020 Nordson Corporation
Cleaning the Tank
To avoid problems that can occur when different hot melt materials are mixed
or when hot melt char forms in the tank. Clean the tank when:
S Changing to a different type of hot melt
S Excessivecharbuildsupinsidethetank
NOTE: The tank cleaning procedures provided in this section require that an
appropriatehotmeltsystemcleanerbeusedtosoftenordissolveresidual
hotmelt.Ifyouareuncertainwhattypeofhotmeltsystemcleaneris
appropriate for the adhesives you are using, contact your hot melt supplier.
WARNING! Hot! Risk of burns. Wear heat-protective clothing, safety
goggles, and/or heat-protective gloves.
1. Empty the tank either by operating the system until the t ank is empty or
by pumping out the contents using the drain valve. Refer to Draining the
Tank given earlier in this section.
2. While the tank is at normal operating temperature, and while wearing
appropriate protective equipment, wipe residual hot melt and loose char
from the tank. Do not use sharp objects to scrape the tank as damage to
the release coating may result.
3. Add hot melt system cleaner to the tank and clean the tank following the
cleaner manufacturer’s instructions.
4. Using the drain valve, pump the cleaner out of the tank. Refer to Draining
the Tank givenearlierinthissection.
5. If necessary, while wearing appropriate protective equipment, wipe the
inside of the tank clean again.
6. Replace the adhesive filter with a new one.
7. If you are changing to a different type of hot melt adhesive, flush the
system by pumping a minimum of one tank of the new adhesive through
the system.
8. Return the syst em to normal operation.
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