Principles Of Operation; Introduction; Air System; Moisture Removal System - Ingersoll Rand Nirvana NVC2000 A400 Manual Del Operador

7.1 INTRODUCTION

Ingersoll Rand Nirvana™ Cycling dryers remove moisture from
compressed air by cooling the air temperature to between 36° and 40°F
(2 and 4°C). This causes vapors to condense into liquid droplets which
can then be easily removed from the air. The major systems of the dryer
which contribute to its operation are the Air System, the Moisture
Removal System, the Refrigeration System, the Thermal Mass
Circulating System and the Controls.
describe each of the systems in greater detail.

7.2 AIR SYSTEM

The air system consists of the dryer components which are in contact
with the compressed air. Referring to Figure 1 and following the bold

7.3 MOISTURE REMOVAL SYSTEM

Ingersoll Rand condensate drains discharge condensed moisture and
lubricants (condensate) from compressed air equipment.
Liquid droplets are removed from the air stream in the separator. As the
air and liquid mixture passes through the separator it spins, slows down
and then changes direction. This causes condensate to fall out of the air
stream and collect in the bottom of the separator. The collected liquid is
removed from the separator by a timed electric drain(standard) which is
controlled by the Controller OR an optional No-Air Loss drain.
7.3.1

SOLENOID DRAIN (STANDARD)

The Drain Open time and Drain Closed time are accessed by
depressing the appropriate button and using the up and down
arrows to change the value. The Drain Open value is
seconds; the Drain Closed value is minutes.
• To obtain the optimum time values for operation of the
electric drain valve, set the drain closed time to five minutes
and the open time to ten seconds.

7.0 PRINCIPLES OF OPERATION

The following paragraphs
FIGURE 1 FLOW DIAGRAM
Nirvana Cycling Refrigerated Dryer Models 2000-2400
ingersollrandproducts.com
" ," hot saturated air from the compressor enters the
AIR FLOW
precooler/reheater where the air temperature is reduced prior to
entering the chiller by the cool air exiting the air/moisture separator. This
precooling allows for the use of a smaller refrigeration system. The air
then goes into the chiller section where it is further cooled to the desired
dew point by a thermal mass fluid. The temperature of the thermal mass
fluid is maintained by the refrigeration circuit and controls. The air
continues to the separator where moisture is removed, thereby, allowing
the cool, dry air to return back to the precooler/reheater to be heated by
the incoming moist hot air. The air exiting the "reheater" portion of the
dryer should be approximately 15°- 20°F lower than the inlet air
temperature based on standard conditions at full rated flow.
INSTRUMENTATION DIAGRAM
• After running the unit under full rated flow for approximately
30 minutes, verify that when the electric drain opens, all of
the accumulated liquid is discharged and then followed by a
small burst of air.
• If a small amount of liquid and a large amount of air is
discharged, decrease the on-time setting or increase the off-
time setting. If there is all liquid and no air has been
discharged, increase the on-time setting or decrease the off-
time setting.
• The on/off-time settings will vary accordingly to seasonal
conditions. During the summer when more moisture is
present in the air system, a shorter ontime that increases the
valve opening frequency is required. A longer off-time may be
used during the winter months when moisture levels are
lower.
PROCESS AND
NVC2000-2400
550020 C
AIR AND WATERCOOLED
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