Heated Purge Timer Cycle; Heatless Pressure Swing Timer Cycle; Restart Modes; Manual Mode (Zero) - Ingersoll Rand EH Serie Manual De Operador

7.7.1

HEATED PURGE TIMER CYCLE

In the externally heated operating mode, the Microprocessor
Control controls an eight-hour cycle. The tower switch-over
occurs every four hours.
occurs, the regenerating tower depressurizes for 50 seconds.
After depressurization, heated regeneration begins and
extends for 2 hours and 58 minutes. The heating supply is
turned off and the purge air flow continues for the next 58
minutes. The purge air supply during this time is used to cool
down the hot desiccant. After the cool down stage, a
repressurization stage repressurizes the offline tower for 3
minutes.
7.7.2

HEATLESS PRESSURE SWING TIMER CYCLE

In the heatless operating mode, the Microprocessor Control
controls a ten-minute cycle. The tower switch-over occurs
every five minutes.
occurs, the regenerating tower depressurizes and tower
regeneration occurs for four minutes and 15 seconds. At that
time, tower repressurization begins.

7.8 RESTART MODES

The Microprocessor Controller includes a Shutdown Sequence that is
activated when the dryer OFF button is depressed.
positions the valves to their failsafe position and resets the program and
is the recommended method of shutting down the dryer. When the dryer
is subsequently energized, the dryer is ready to run at the start of the
program. Should, however, power be cut to the dryer before the
Shutdown Sequence has been initiated, as would be the case from a
power failure, the dryer can be configured to restart in one of two restart
modes. Note that when the dryer is shut down using the OFF button,
the dryer will require user intervention to restart the dryer.
7.8.1

MANUAL MODE (ZERO)

Ingersoll Rand dryers are shipped from the factory in the
Manual Mode. After power is re-supplied to the dryer, the user
will be presented with the "PRESS ON" display. The valve
switching and timing operations will only start once the ON
button is depressed. In this configuration, to restart the dryer,
the user must manually depress the ON button on the
Microprocessor Control panel.
7.8.2

AUTO RESTART MODE (LAST)

In this mode, the dryer will re-start automatically once power
is applied to the dryer. The Microprocessor Control will pick up
where it left off in the program once power is applied.
7.0 PRINCIPLES OF OPERATION
Ten seconds after switch-over
Ten seconds after tower switch-over
This feature
EH Series Desiccant Dryer Models 150-8000
http://www.ingersollrandproducts.com

7.9 OPERATING TIMES

In the CUSTOMER MODE, the Microprocessor Controller provides
access to the operating hours of the dryer. The following describe the
method to access and review the operating and purge hours for the
dryer:
OPERATING TIMES
SELECT
DISPLAY PRESS ENTER
Depress the SELECT DISPLAY button until the OPERATING
TIMES display appears.
BEGIN TIMES
ENTER
Depressing the ENTER button enters the OPERATING TIMES
menu.

OPERATING HOURS

SELECT
DISPLAY 000000065
Depressing the SELECT DISPLAY button displays the
cumulative operating hours of the dryer.
PURGE HOURS
SELECT
DISPLAY 000000009
Depressing the SELECT DISPLAY button displays the
cumulative hours the dryer has used purge air.
BEGIN TIMES
SELECT
DISPLAY
Depressing the ENTER button returns the display to the top of
the OPERATING TIMES menu.
OPERATING TIMES
PRESS ENTER
Depressing the button returns the controller to the
CUSTOMER MODE
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