Shutdown Sequence; Initial Start-Up; Shut Down Procedures - Ingersoll Rand EH Serie Manual De Operador

PRESS ON
Once power is applied to the dryer and after a brief initialization
sequence, the PRESS ON prompt will be displayed.
• Verify all actuated valves are in their failsafe position.
• Using a voltmeter, check the power connections for the correct voltage
shown on the dryer serial nameplate
• Close and secure all electrical panel covers.
• Ensure that the purge adjustment valve is in the open position.
LT DRY
ON
Depress the ON button to initiate the dryer program.
Microprocessor Controller will display the first CUSTOMER MODE
screen
• The sequence will initiate proper Inlet and Purge Valve positioning and
tower depressurization.
• If the dryer has been in storage or off for an extended period of time,
the Blue Moisture Indicator may be gray, the High Dew Point Alarm (if
equipped) may be activated and the Dew Point Display (if equipped)
may indicate a high dew point. Depending upon the duration of idle
time, it may take anywhere from one to twelve hours for the alarm to
deactivate, the BMI to return to its normal blue state and dew point to
drop.
• For dryers equipped with EMS, refer to Section 9.4 regarding the use
of this option.
NOTICE
-100° F dryers require flow through the dryer to lower the pressure dew
point to design levels. Failure to permit air flow through the dryer
(dead-heading) will result in elevated outlet dew points. Once air is
permitted to flow through the dryer, the pressure dew point will
gradually reduce to design levels.

10.8 SHUT DOWN PROCEDURES

The following procedures must be followed to properly shut down the
Heat Reactivated Dryer to avoid damage to the unit and preserve dryer
performance. The dryer requires compressed air to actuate the valves.
Removing the compressed air supply prior to shutting down the dryer
will result in improper valve positioning. In addition, the dryer must
complete a specific Shutdown Sequence prior to being turned off.
Should power be removed from the dryer or air pressure removed from
the dryer prior to the completion of the Shutdown Sequence, damage to
the dryer may occur. Lastly, the inlet valves are configured to open on
a loss of power and the purge valves configured to close (fail safe).
Should a valve open to a depressurized tower, as would be the case if
the dryer were stopped in mid-cycle, a rapid pressurization will occur.
NOTICE
The force of repeated rapid pressurizations will damage the dryer.
10.0 INSTALLATION AND INITIAL START-UP
RT REGEN
EH Series Desiccant Dryer Models 150-8000
http://www.ingersollrandproducts.com
NOTICE
On dryers equipped with EMS, merely leaving the unit in EMS without
a compressed air supply is not advised, as it is likely that the system
pressure will decay over time. Should this occur, the unit will go into
a FTS alarm as well as risk misalignment of valves should switchover
occur prior to reinstating the air compressor.
CAUTION
Dryer should not be shut down during the heating cycle. Doing so
may cause the Heater High Temperature alarm to activate, which will
require the user to manually reset the Heater High Temperature safety
in the control enclosure. If the dryer must be shut down during the
heating cycle, advance the program via the Program Jog function
(see Section 9.9) to the end of the heating cycle prior to initiating the

Shutdown Sequence.

For all Heat Reactivated Dryers Ingersoll Rand recommends that an
isolation valve be installed at the dryer outlet. Upon restarting the
dryer, it is likely that the pressure downstream of the dryer will have
decayed. When starting the dryer without the valve (or with the valve
in the fully open position), the high velocities of the air through the
towers could damage the desiccant, as well as provide unprocessed
air down stream.
The
NOTICE
Prior to removing power or compressed air from the dryer, depress
the OFF button on the Microprocessor Control This initiates the
Shutdown Sequence, which closes the purge valves, repressurizes
the off-line tower and opens the flow valves. DO NOT REMOVE
POWER OR COMPRESSED AIR FROM THE DRYER DURING THE
SHUTDOWN SEQUENCE.
Shut Down Procedure:
• Maintain a compressed air source to the dryer and a
supply of power to the Microprocessor Controller.
OFF
Depress the OFF button to initiate the SHUTDOWN SEQUENCE.
• Permit the dryer to complete the full SHUTDOWN
SEQUENCE (30 seconds).
Once the PRESS ON Prompt is displayed, the dryer has
completed the SHUTDOWN SEQUENCE. Power and air may be
safely removed from the dryer.
• De-energize the dryer
• Shut down air compressor or bypass dryer
• Close Isolation Valves (if equipped)
Note: On the subsequent Start-up, the outlet isolation valve should be
in the closed position.
downstream.
SHUTDOWN
SEQUENCE
PRESS ON
Slowly open the valve to build pressure
17