Hussmann Ingersoll Rand, User Manual

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Features and Benefits 2
Ingersoll Rand Impact
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Semi-hermetic Reciprocating Compressors
Features and Benefits
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Small physical size and weight for comparable displacement and capacity
x
Universal
o
One compressor version for all temperature ranges using R404A, R507,
and R22
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Smooth and Quiet Operation can be Attributed to:
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Short stroke operation
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Multiple cylinders positioned to avoid harmonic frequencies
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Balanced drive systems
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Cylinder heads with cast in muffler
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Precision machining
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Unloaders
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1 step (50%) capacity control on 4-cylinder models
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2 steps (33%, 66%) capacity control on 6-cylinder models
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Motors
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Dual voltage on models above 1480 CFH
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Motor efficiency 90% or greater
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Electronic motor protection with embedded thermisters to sense motor
winding temperatures
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Oil System – IR4C models, smaller 4 cylinder compressors
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Enhanced centrifugal lubrication system
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Front main bearing is located in cavity on front bearing plate and is
submersed in oil
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Fills front bearing cavity with oil in a fraction of a second
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When oil is diluted with refrigerant, separation of oil and refrigerant takes
place as the oil is “slung” against the front bearing cover
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Oil travels down internal passages in the crankshaft, driven by centrifugal
force. This lubricates the connecting rod bearings and motor bearings
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Hydrodynamic lubrication provides enough oil and pressure to lubricate
the bearings without floating the bearing in oil
o Piston pin bearings are splash lubricated by the connecting rod
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Oil carry over is minimized since high-pressure oil is not forced into the
motor cavity
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Efficiency is increased since no power is required to drive an oil pump