Nirvana Cycling Refrigerated Dryer Models 1000-1600
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9
7.0 PRINCIPLES OF OPERATION
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. Not
used for basic dryer functions. Not to be used by
customer or service technician.
7.6.2 DISPLAY PARAMETERS
The Microprocessor Control is capable of displaying
a number of system parameters. The following
summarizes the 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.
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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).
7.6.3 DRYER SET POINTS AND ALARMS
The Microprocessor Control has several user adjustable
set points that are displayed at the end of the display
parameter list. These set points allow the user to
configure the dryer to operate according to site
conditions. The controller is shipped from the factory
with each parameter having its own default value. The
following chart summarizes the parameters that may
be adjusted by the user:
SETPOINT
Display
description
Parameter
Range
Factory
Setpoint
Nirvana
Cycling
Chiller Off
Temperature
CHLLR
TEMP
32 °F - 50
°F;
1 °F
increments
34 °F
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INTERNAL SALES ORDER# 81730430
DRYER PART NUMBER: NVC1000W400
PROJECT: Niagara Bottling,LLC_Kenosha, WI
