General Description - Ingersoll-Rand Nirvana Serie Bedienungsanleitung

12207.13.10

8.5 GENERAL DESCRIPTION

The compressor is an electric motor driven, contact
cooled screw compressor, complete with all
necessary components piped, wired and baseplate
mounted. It is a totally self contained air compressor
package.
The standard compressor is designed to operate in
an ambient range of 1.7_C to 46_C (35_F to 115_F).
The standard maximum temperature of 46_C (115_F)
is applicable up to an elevation of 1000m (3280ft)
above sea level. Above this altitude significant
reductions in ambient temperature are required if a
standard motor is to be used.
The compressor is managed by the onboard
electronic controller. The controller and drive system
operate together to vary the speed of the compressor
to deliver compressed air at the target pressure.
Panel instrumentation is provided to indicate the
compressor operating conditions and general status.
The air/coolant mixture discharges from the
compressor into the separation system. This system
removes all but a few PPM of the coolant from the
discharge air. The coolant is returned to the cooling
system and the air passes to the aftercooler and out
of the compressor through the moisture separator.
Air is pulled into the machine by the cooling blower
(N250−300H use a propeller fan for cooling) and
through the combined cooler / aftercooler.
By cooling the discharge air, much of the water vapor
naturally contained in the air is condensed and is
drained from the built−in moisture separator and
drain.
NOTICE
Nirvana air compressors are factory filled with SSR ULTRA COOLANT which is designed to operate for 8,000
hours or two years, whichever comes first.
Units supplied with optional Food Grade Coolant are designed to operate 1000 hours or 6 months, whichever
comes first.
The coolant must be changed at these intervals to avoid breakdown and equipment damage.
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8.0 GENERAL INFORMATION
IRN37−160K−CC & IRN50−200H−CC & IRN75−160K−2S & IRN100−200H−2S & IRN250−300H−2S
The coolant system consists of a sump, cooler,
thermostatic valve, anti−condensation valve and a
filter. When the unit is operating, coolant is forced by
air pressure from the separator tank to the
thermostatic element. The position of the element (a
direct result of coolant temperature) will determine
whether the coolant circulates through the cooler,
bypasses the cooler, or mixes the two paths together
to maintain an optimum compressor injection
temperature. The two position anti−condensation
valve can reduce the coolant flow and hence the
temperature rise of coolant through the compressor.
This temperature is controlled to preclude the
possibility of water vapor condensing. By injecting
coolant at a sufficiently high temperature, the
discharge air coolant mixture temperature will be kept
above the dew point. On the N90/160K,
N125/200H−SS, N75/160K−2S, N100/200H−2S and
N250/300H−2S, the system is enhanced by a control
logic that varies the cooling blower speed dependant
on the intake and discharge temperatures and hence
controls the injection temperature even closer while
saving blower motor energy.
The compressor is provided with a temperature
sensor which will shut the unit down in case of
excessive temperature, 109_C (228_F).
Effective coolant filtration is provided by the use of a
screw on, heavy duty coolant filter.
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