Fulfill
Retrofit Kit − DuraBlue/VersaBlue 25L and 50L Melters
13
Part 1105309A
E 2010 Nordson Corporation
Theory of Operation
Overview
The system adds small quantities of adhesive to the sealed tank at regular
intervals, reducing the possibility of adhesive char, contaminants, thermal
shock and incorrect adhesive temperatures that result in poor bonding.
A capacitance sensor located in the melter detects low adhesive level, and
then sends a signal to the Fulfill system control box. A delay timer prevents
the fill system from frequently cycling on and off.
At the end of the delay, the control box activates the vacuum via a solenoid
valve. Air pressure flows to a suction lance that is placed in the supplied bulk
adhesive container. Using vacuum, the system conveys adhesive from the
bulk container to the adhesive melter tank. When the adhesive in the melter
tank reaches the desired level, the control box shuts off the solenoid valve to
stop the flow of adhesive.
The control box activates the suction lance for a limited amount of time to
prevent over‐fill conditions. If the maximum fill time is exceeded, the
controller activates a fault that stops the system from filling.
A safety interlock switch detects whether the melter tank lid is in place. If the
tank lid is not in place, the fill system will not operate.
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