Status Panel User Interface; Microprocessor Control; Display Parameters; Timing Sequence - Ingersoll Rand EH Serie Manual De Operador

7.6.2

STATUS PANEL USER INTERFACE

The status panel provides clear indication of dryer status via
bright LED indicators. The following illustration summarizes
the panel's features:
Dryer ON (Green)
Left Tower Regeneration
(Yellow)
Left Tower Drying
(Yellow)
NOTE: Ingersoll Rand solid state temperature controller modulates the
heater repeatedly during the heating cycle. Pulsating of the heater LED
will occur as a result and should be considered normal dryer operation.
7.6.3 MICROPROCESSOR CONTROL DISPLAY PARAMETERS
The Microprocessor Controller is capable of displaying a
number of system parameters in the default CUSTOMER
MODE. The following summarizes the parameters that can be
accessed by depressing the SELECT DISPLAY button from
the Microprocessor Controller. (Note that some displays are
optional and may not appear on all models):
• Tower Status {LT DRY / RT REGEN or LT REGEN / RT
DRY}: Provides visual confirmation of tower drying and
regenerating status.
• Step Timer {ie STEP 4
displaying the current step in the program and the time
remaining for the displayed step.
• Dew Point Temperature (OPTIONAL) - {DEW POINT TEMP:
XX}: When equipped with the optional EMS feature,
provides accurate display of dryer outlet pressure dew point.
• Purge Status (OPTIONAL) -
Indicates whether unit is currently consuming purging air.
Requires EMS.
• Heater Status (HEATED PURGE MODE ONLY) - {On /
OFF}: Indicates that the heater is being given a signal to
heat the purge air.
6
7.0 PRINCIPLES OF OPERATION
Figure 2 - Status Panel
TIME 120}: Information screen
{PURGE / NO PURGE}:
EH Series Desiccant Dryer Models 150-8000
http://www.ingersollrandproducts.com
• Heater Temperature
{HEATER TEMP: XX}: Indicates the heater temperature set
point..
• Alarms {ALARM LIST - PRESS ENTER}:
<ENT> at this prompt permits viewing of current alarm status
and alarm history, which includes the time and date of the
alarm occurrence.
• Operating & Purge Times - {OPERATING TIMES - PRESS
ENTER}: Depressing <ENT> at this prompt provides access
to the operating and purge hours of operation.
• Operating Mode {OPERATING MODE: HEATLESS /
HEATED PURGE}: EH dryers are capable of operating in
Heated Purge and Heatless Pressure Swing modes. This
display indicates mode of operation for dryer.
Once the last screen is displayed, depressing the SELECT DISPLAY
button will return the display to the top of the list.

7.7 TIMING SEQUENCE

All timing functions are performed by Ingersoll Rand' Microprocessor
Controller, an advanced micro PLC designed exclusively for Ingersoll
Rand dryers. The Microprocessor Controller is completely programmed
at the factory and does not require any further adjustment. The standard
timing cycle switches the Inlet Flow Valve, which alternates the drying
tower. At the same time as the Inlet Flow Valve opens, the appropriate
tower Purge Valve opens to begin the purge flow generation. Once the
purge regeneration flow portion of the dryer cycle is complete, tower
repressurization begins as previously described.
Dryer OFF / Alarm
(Red)
Right Tower Regeneration
(Yellow)
Heater Operation
(Green)
Right Tower Drying
(Yellow)
(HEATED PURGE MODE ONLY) -
Depressing