Nirvana Cycling Refrigerated Dryer Models 1000-1600
ingersollrandproducts.com
10
7.0 PRINCIPLES OF OPERATION
7.6.4 ADJUSTING SET POINTS
Accessing and manipulating each of the set points
in the CUSTOMER MODE is accomplished as follows.
The parameter is selected using the SELECT DISPLAY
button. After scrolling through the displays, the “Cust
Set Points” screen is displayed. The parameters after
this screen may be adjusted by the user. Once the
desired parameter is displayed, depressing the “+/-”
button changes the set point. Once the new set point
is displayed, depressing ENTER saves the set point.
Exiting the Customer Set Point routine is accomplished
by depressing the SELECT DISPLAY button until the
END CUST SET PTS screen is displayed. The following
example illustrate the keystrokes required to change
the Chiller Temperature Set Point from 36 F to 38 F.
SELECT
DISPLAY
CHLLR TEMP: 36
Pressing SELECT DISPLAY will increment the display
through the available display parameters.
SELECT
DISPLAY
Cust Set
Points
Continue pressing SELECT DISPLAY until the Customer
Set point screen is displayed. The parameters that follow are
the User Adjustable Parameters for the controller.
SELECT
DISPLAY
CHLLR TEMP: 36
Press SELECT DISPLAY until “CHLLR TEMP” is displayed.
CHLLR TEMP: 38
Depress “ + / -“ as required to change the CHLLR TEMP
to 38 degrees.
ENTER
CHLLR TEMP: 38
Pressing “ENTER” saves the set point.
SELECT
DISPLAY
End Cust Set
Pts
Press SELECT DISPLAY as necessary to display the End
Customer Set points Screen.
SELECT
DISPLAY
CHLLR TEMP: 36
Press SELECT DISPLAY as necessary to return the
Microprocessor Control to the desired display parameter.
7.6.5 ALARMS AND THEIR FUNCTIONS
There are several alarms detected by the
Microprocessor Control to alert the user of an out of
tolerance condition. Once each alarm is detected, a
description of the alarm will appear in the screen and
the remote alarm contact will close. Note that during
the alarm condition, the SELECT DISPLAY button
may be depressed to scroll through the available
parameters. After approximately 30 seconds, the alarm
screen will reappear, provided the alarm condition
persists.
The alarm names and a brief description of each are described
in detail below.
Alarm
Display
Alarm Set
Point
HIGH PRESSURE CUTOUT
HI PRESS CO See Table 1
LOW PRESSURE CUTOUT
LO PRESS CO See Table 1
HIGH TEMPERATURE ALARM HITEMP ALRM 55 °F
LOW TEMPERATURE ALARM LOTEMP ALRM 30 °F
HIGH TEMPERATURE ALARM (HITEMP ALARM)
When the thermal mass (glycol) temperature in a Nirvana™
Cycling dryer reaches the factory alarm set point, after an alarm
delay, the alarm will be activated. This alarm condition may
not necessarily damage the dryer when subjected to long-
term exposure. It may, however, have a significant impact on
downstream processes and thus should be investigated upon
detection. Note that this alarm will not shut down the dryer.
This alarm will activate the remote alarm contact and reset
automatically once the alarm condition is rectified.
LOW TEMPERATURE SAFETY ALARM (LOWTEMP ALARM)
If the dryer chiller temperature falls to or below the factory
set point and remains at or below this set point for the factory
delay time, the alarm routine will activate. This alarm condition
may cause damage to the dryer when subjected to continuous
or long-term exposure. Note that this alarm will shut down the
dryer after a response time delay. This alarm will activate the
remote alarm contact and reset automatically once the alarm
condition is rectified.
HIGH PRESSURE CUTOUT ALARM (HPCO ALARM)
If the discharge pressure of the refrigerant is determined to be
above the set point, the alarm routine will activate. This alarm
condition may cause damage to the dryer when subjected to
continuous or long-term exposure. Note that this alarm will
shut down the dryer after a response time delay. The operator
must depress the RESET button in order to clear the alarm and
restart the refrigeration system.
INTERNAL SALES ORDER# 81730430
DRYER PART NUMBER: NVC1000W400
PROJECT: Niagara Bottling,LLC_Kenosha, WI
