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:
6
HB Series Desiccant Dryer Models 150-8000
ingersollrandproducts.com
7.0 PRINCIPLES OF OPERATION
Dryer ON (Green)
Left Tower Regeneration
(Yellow)
Left Tower Drying
(Yellow)
Dryer OFF / Alarm
(Red)
Right Tower Regeneration
(Yellow)
Right Tower Drying
(Yellow)
Figure 2 - Status Panel
Heater Operation
(Green)
Blower Operation
(Green)
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 TIME 120}: Information screen
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) - {PURGE / NO PURGE}:
Indicates whether unit is currently consuming purging air.
Requires EMS.
• Heater Status (BLOWER PURGE MODE ONLY) - {On / Off}:
Indicates that the heater is being given a signal to heat the
purge air.
• Blower Status (BLOWER PURGE MODE ONLY) - {On / Off}:
Indicates that the blower is being given a signal to supply the
purge air.
• Heater Temperature (BLOWER PURGE MODE ONLY) -
{HEATER TEMP: XX}: Indicates the heater temperature set
point.
• Alarms {ALARM LIST - PRESS ENTER}: Depressing
<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 /
BLOWER PURGE}: HB dryers are capable of operating in
Blower 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’s 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 Valves, 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.
120.26 Dryer - Operation, Installation, Maintenance Manual, and Parts
