Sterlco SDAP 90-225 CFM Series Drying and Conveying Systems - Manual (Page 30)

Page 30 SDAP Series PD 2 to PD 4 Drying and Conveying Systems
Right Bed In Regen Light
The Right Bed In Regen LED lights when the right bed is in regeneration.
Right Bed Heater Light
The Right Bed Heater indicator lights when the right bed regenerates and is in the heat-up
portion of the regeneration cycle.
Process Blower On Light
The Process Blower On indicator lights when the process blower energizes.
Process Heater On Light
The Process Heater On indicator lights when the process air heater is energized.
Low Compressed Air Light
The Low Compressed Air alarm indicator lights when the dryer compressed air supply drops
below 60 psi (413kPa/ 4.13 bars). Upon loss of compressed air, the pressure switch opens and
sends a signal to the PLC controller to shut down dryer operation. Dryer operation automatically
resumes when 80 psi (551 kPa/ 5.51 bars) air is restored.
High Temp Process Air Light
The High Temp Process Air alarm indicator lights when the temperature at the process air
thermocouple is above the high alarm set value. Upon high temperature alarm condition the
process heaters turn off, the process blower remain on.
The alarm mode and value are factory-set to track 25º above the process set point. The alarm
value is an upper-limit deviation above the process set point. When the temperature at the
process thermocouple returns to within the acceptable range, the alarm output de-energizes and
all heaters turn on again automatically.
High Temp Regen Air Light
The High Temperature Regen Air alarm indicator lights when the thermostat above the
regeneration heater assembly senses an abnormally high temperature.
The regeneration heaters shut down until the temperature falls below the alarm point. The
regeneration blower continues to run for cooling the heaters and desiccant bed. The alarm
condition clears when the temperature drops below the thermostat setpoint. The heaters re-
energize automatically.
High Dew Point Light
The High Dew Point alarm indicator lights when the process air delivery dew point exceeds a
dew point of -10
°F (-23°C).