Basic User Interface; Display Parameters - Ingersoll Rand Nirvana NVC2000 A400 Manual Del Operador

7.6.1

BASIC USER INTERFACE

The Microprocessor Control display provides the user with the
operating parameters and their corresponding values. The
following illustration summarizes the keypad functions.
BUTTONS
• ON
Places the dryer "On Line"; Energizes glycol pump on Nirvana™ Cycling
dryers. For Nirvana™ Cycling models, the compressor will operate based on
temperature;
• OFF
Places the dryer "Off Line"; Stops all automatic functions, including circulating
pump operation on Nirvana™ Cycling dryers.
• SELECT DISPLAY
Allows the user to cycle through the available displays. The last display
selected will remain displayed as the default display.
• + / -
Allows user to modify set point values. Set point values cycle through a fixed
range. Also allows entering negative numbers in FACTORY MODE.
• TEST
Allows user to manually activate the drain valve.
• RESET
Pressing once clears the local alarm indication and de-energizes the remote
alarm contact. Should the alarm condition persist, the alarm will return after
the alarm inhibit time has expired.
• SET
Permits the adjustment of parameters in TECHNICIAN and FACTORY
MODES. In CUSTOMER MODE, allows user to back through displays,
• ENTER
Used to accept changed parameters and set point values.
• i
Restricted Level access for factory use only.
functions. Not to be used by customer or service technician.
7.0 PRINCIPLES OF OPERATION
Not used for basic dryer
Nirvana Cycling Refrigerated Dryer Models 2000-2400
ingersollrandproducts.com
7.6.2

DISPLAY PARAMETERS

The Microprocessor Control is capable of displaying a number
of system parameters.
parameters that can be accessed by the user from the
Microprocessor Control:
• Chiller Temperature (CHLLR TEMP): For Nirvana Cycling
Dryers, the Chiller Temperature is the temperature, in
degrees Fahrenheit, of the thermal mass fluid.
• Compressor Status (CMPRSSR): Displays whether the
refrigeration compressor is "ON" or "OFF".
• Discharge Pressure (P disch): Displays the discharge
pressure of the refrigeration system.
• Suction Temperature (T suction): Displays the suction
temperature, in deg. F, of the refrigeration system. This
value is useful in determining superheat of the refrigerant.
• Suction Pressure (P suction): Displays the suction pressure,
in psig, of the refrigeration system.
• Percent Savings (% SVGS): Displays the length of time the
compressor has been operating versus the length of time
the dryer has been on.
• Cumulative Dryer Hours (CUM DRYER HR): Displays the
length of time, in hours, that the dryer has been operational.
• Cumulative Compressor Operating Hours (CUM CMP HR):
Displays the length of time, in hours, that the refrigeration
compressor has been energized.
Depressing the SELECT DISPLAY button repeatedly scrolls
through the above non-adjustable displays. The Customer
Set Points appear at the end of the list and may be adjusted
by the end user to match seasonal refrigeration and drain
operation. These settings are as follows:
• Chiller Temperature (CHLLR TEMP)
The following summarizes the
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