8.0GENERAL INFORMATION
8.5GENERAL 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.
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.
Notice
Nirvana air comrpessors 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.
64IRN37 - 160K - CC & IRN50 - 200H
http://air.irco.com
