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EMS SET POINT
1
Use the numbers on the keypad to enter the desired
pressure dew point temperature for the EMS setpoint.
EMS SET POINT
ENTER
Depressing ENTER saves the selected set point.
9.5 PURGE TEMPERATURE (OPTIONAL, HEATED PURGE MODE)
On dryers equipped with EMS, the temperature of the purge exhaust is
monitored and displayed on the Microprocessor Controller. After a tower
switch-over, and at the beginning of tower regeneration, the purge
exhaust temperature will be relatively low (normally 90 to 110°F). The
purge exhaust temperature will increase as desiccant regeneration
progresses. As nearly all of the previously adsorbed moisture is driven
off of the desiccant, the exhaust temperature will begin to rise. The
timing for the temperature change will vary depending on moisture
loading on the towers . When the purge exhaust temperature reaches
195°F, which indicates that the desiccant heating is complete, the
Microprocessor Controller will remove power to the heater. Once the
heater is turned off, the tower cool down process begins and continues
for 57 minutes. Purge air will continue to exhaust and the exhaust air
temperature will continue to rise (250°F is not uncommon) as it removes
the heat from the regenerated desiccant material. As the cool down
progresses, the exhaust temperature will begin to decrease. After
cooling, the Purge Valves close and the optional Repressurization Valve
(if equipped) opens. The off-line tower remains pressurized until the
tower switchover sequence is initiated. Activation of the Purge
Temperature feature is via the Microprocessor Controller.
The following illustrates the method of accessing and activating the
Purge Temperature feature:
PURGE TEMP: OFF
SELECT
DISPLAY
Depress the SELECT DISPLAY button until the PURGE
TEMP screen is displayed.
PURGE TEMP: ON
+
-
Depress the +/- button until the desired set point is displayed.
Pressing SELECT DISPLAY saves the current selection.
12
9.0 TECHNICIAN MODE
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EH Series Desiccant Dryer Models 150-8000
http://www.ingersollrandproducts.com
9.6 RESTART MODE
Ingersoll Rand dryers can be configured to restart in one of two
operating modes. As described in Section 7.8, the dryer may be
configured for Manual operation (factory default) or Auto Restart, which
permits the dryer to operate automatically once power is re-applied to
the dryer after a power failure. The following illustrates the method of
accessing and adjusting the different start modes for the dryer:
SELECT
DISPLAY
Depress the SELECT DISPLAY button until the START
MODE screen is displayed.
+
-
To change the start mode from its current selection to the
alternate setting, depress the +/- button until the desired set
point is displayed. Pressing SELECT DISPLAY saves the
current selection.
NOTICE
The restart modes will only affect restarting should power be
unexpectedly removed from the dryer. After proper shut down, the
dryer will require the user to depress the ON button to initiate the
operation of the dryer program.
9.7 EXTENDED HEATING (OPTIONAL)
On dryers equipped with the Energy Management System option, the
dryer may be operated in an extended heating mode. In this mode, the
heating cycle is extended while the Energy Management System
function prolongs the drying cycle. This feature is particularly useful
when operating the dryer with new desiccant. As described earlier in this
manual, new desiccant has the ability to adsorb more moisture than the
dryer can desorb in a fixed regeneration cycle. With the Extended
Heating operation, the Energy Management System feature can be
used immediately without the need to age the desiccant. To enable the
Extended Heating mode, perform the following keystrokes:
EXTENDED HEATING
SELECT
DISPLAY
Depress the SELECT DISPLAY button until the EXTENDED
HEATING screen is displayed.
EXTENDED HEATING
+
-
Depress the +/- button until the desired set point is displayed.
Pressing SELECT DISPLAY saves the current selection.
RESTART
ZERO
RESTART
LAST
OFF
ON
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