Sterlco MDB Series Dryers - Manual (Page 45)

Regen Air Blower Safety Fault
Regen Air Dirty Filter Alert
Regen Exhaust Sensor Error Alert
Temperature Alarms
The control checks for high low and fail to change (loop break) alarm conditions on the
regeneration inlet temperature and the drying hopper process supply air temperature. It also
checks for high temperature on the dryer exit and the pre-cooler (or after-cooler) if the option is
installed.
A high temperature alarm is generated when the actual temperature rises above a pre-set limit, or
when the difference between the actual temperature and a controlling set point (if one exists) is
greater than a calculated limit. High temperature alarms are always treated as critical alarms.
A low temperature alarm is generated when the actual temperature falls below a pre-set limit, or
when the difference between the actual temperature and a controlling set point (if one exists) is
less than a calculated limit. Low temperature alarms are always treated as non-critical alarms.
A loop break alarm is generated when a controlled temperature fails to rise by X degrees every Y
seconds while its heaters are consuming power. The setting values associated with loop break
alarms are automatically calculated following the completion of an auto-tune. Loop break alarms
are always treated as critical alarms.
4-7 Multi-Hopper Dryer Control Operation
The DryPro Control for a dryer with more than one hopper is very similar to the standard
single hopper version. However, there a few differences that need to be noted.
You will notice the addition of the black and white arrow on several setup screens. This
allows for a convenient transition from one hopper or dryer setup screen to the next. The
single hopper control did not require this arrow.
Controls 45