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Installation 2 - 7
When the Energy Management System LED indicator is
OFF, the dryer either does not have the Compu-Save En-
ergy Management System option, or that the sensor has
determined that the relative humidity in the on-line chamber
has reached the predetermined set point. At next
switchover, that chamber will regenerate using purge air.
When the Energy Management System LED indicator is
flashing, a high humidity condition may exist or there is an
Energy Management System failure.
Left Chamber DRYING Light
The Left Chamber DRYING light on the DEC control panel
indicates when the left chamber is drying.
Right Chamber DRYING Light
The Right Chamber DRYING light on the DEC control panel
indicates when the right chamber is drying.
Valve Switching Failure (Option A & B)
This alarm is triggered when the drying chambers are not in
the correct pressure state. The chamber pressure switch
should be open on the on-stream chamber and closed on
the regenerating chamber. If triggered, the dryer control
system will energize the red LED on the DEC control panel
labeled VALVE FAILURE and de-energize the common
alarm relay. The alarm automatically clears once the
alarm conditions are corrected.
Chamber Pressure Gauges
A gauge mounted on the inlet valve block (models LS60
through LS1500) or panel mounted (models LS2070 and
LS2580) indicates which chamber is on-stream and which
is regenerating. The gauge for the on-stream chamber in-
dicates operating pressure; the gauge for the regenerating
chamber should indicate 0 psig.
Purge Flow Indicator
A locally mounted gauge indicates purge air pressure as an
approximate measure of purge air flow when used with the
appropriate calibration curve found in Appendix A (for -
100°F pdp refer to Appendix C).
Moisture Indicator (Option A & B)
An indicator utilizing specially treated "silica gel" which
changes color to alert personnel of a moisture problem re-
quiring corrective action. The indicator is blue when dry,
but gradually changes to pink in color whenever a "wet gas"
sample is received.