for the Compressor Package
This appendix 1 describes the basic points of design and manufacturing for the packaging work using
i-series compressor. In what is described here, there are overlapping explanations in chapter 1 to
chapter 4 of this manual, but please refer to it as explanation to supplement them.
1-1 Basic Flow of the Package Unit
Figure app.1-1 is the reference flow of the package unit using i-series compressor.
Circulation of the lubricating oil (refrigerating oil) is necessary for the compressor for lubrication of the
sliding surface parts such as bearings, mechanical seal assembly, the rotors, etc. and discharge
temperature adjustment
Generally, oil separator, oil cooler, oil filter(s), protection switches or sensors and valves become the
basic component.
The i-series compressor can use the flange type motor by using an exclusive motor spacer.
Oil pump is not necessary for the i-series compressor for differential pressure oil supply system.
Therefore it is necessary to secure the lowest oil supply pressure (high and low differential pressure) to
prevent damage by the poor lubrication of bearings and the mechanical seal assembly.
Install the oil filter(s) less than 20 μm (β
20
≧150) filtration precision in the oil line to the compressor to
prevent the entry of foreign matter such as dust. For details, refer to Section 3.2.5.2 in this manual
Chapter 3.
The gas suction side inside of the i-series compressor has a suction filter and a check valve.
The compressed refrigerant gases separate lubricating oil with passing the coalescer inside the oil
separator.
In order to ensure the minimum differential pressure (oil supply pressure - suction pressure) at the
compressor start-up, MAYEKAWA recommends that you install a pressure regulating valve in the oil
separator outlet piping.
In order to ensure the minimum differential pressure (oil supply pressure - suction pressure) at the time
of the compressor start-up, MAYEKAWA recommends that you install a pressure regulating valve in the
oil separator outlet piping.
Because regulations of the refrigerating system vary according to the use area, at the time of packaging,
make sure that equipment configuration and operation control flow conform to the regulations in your
area.
Figure app.1-1
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