Conair HTC 120, User Manual, Page: 228 / 330

4-86 l O p e r a t i o n
Using the OptiMizer™
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The Initial delay and Pre-dry modes occur when no material is being used. When
the dryer is running and the OptiMizer™ is enabled, the initial delay is the first
mode the system activates. During both of these modes, the Pre-dry setpoints
from the recipe are used for the temperature and air flow. These initial modes in
the OptiMizer™ sequence are used to bring the material up to its drying tempera-
ture and begin the drying process, before the injection molding machine is started
and material is removed from the hopper.
Once the Pre-dry mode is completed, a message will alert the operator that the
material is ready and the injection molding machine (IMM) or extruder can be
started. In a typical drying application, the Pre-dry mode is designed to provide
ready to use material in three to four hours. This message is displayed and should
be acknowledged like an alarm. The display is shown below.
Pre-dry Material Ready to Use Display
Material use is detected using a digital input from the downstream IMM or extrud-
er, or using the material temperature monitored at the machine throat. This tem-
perature is compared to the material temperature setpoint minus the material tem-
perature band. The temperature band is set on the ‘OptiMizer™ Input Selection
Setup’ screen shown below. Once material use is detected, the system will
progress through the OptiMizer™ Delay mode to allow the system to reach steady
state equilibrium, before any changes are made. During this delay (typically six
hours), the system will continue to use the Pre-dry temperature and air flow set-
points.
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