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Page 38 SMD Series Dehumidifying Dryers
5-10 Redundant Safety Controller Display
Optional
The Redundant Safety Controller limits the process air temperature
from exceeding the upper temperature range set by the E5CN
Temperature Controller. Standard Sterling dryers use a
microprocessor-based controller for limiting the process air
temperature. The controller is a modular, self-contained unit
removable from the mounting housing. All parameters are factory
set and adjusted; normally, no field adjustment to the internal
controls are necessary.
Figure 10
Typical Redundant Safety Controller Display
5-11 Setting the Redundant Safety Controller
The Redundant Safety Controller alarm setting is changed by
pressing the up and down keys to input the alarm value. The upper
display reading indicates the Process Value, while the lower
display indicates the High Point Setting alarm value. The factory
setting for the High Point Alarm Value
(
L1-hi
) is 150°F (-23°C).
5-12 Restoring the WATLOW Redundant Safety
Controller to Factory Setup
If the preset parameters on the controller have been tampered with
and it no longer functions properly, call the Service Department at
Sterling. This controller is not meant to be modified.