Technical Manual VERSION 2.0 -10-18-2018
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The basic aircooled oil cooling system is shown in Figure 64. This
method of cooling is indirect cooling which uses ambient air to cool
down the oil, which circulates in the oil cooler.
ambient air
Watercooled oil cooling (cooling by water)
This cooling method utilizes a shell and tube heat exchanger
and a source of cooled liquid from an external cooling tower or
closed loop evaporative cooler. Oncethrough water can be
used but results in high water usage. An indirect cooling
system uses a pump to circulate the cooling medium and a
cooling tower or evaporative cooler to reject heat from the
cooling medium. The basic watercooled oil cooling system is
shown in Figure 65.
Figure 65 Oil cooling by water
Note:
1. Please decide appropriate oil cooler capacity by referring to HANBELL selection software.
2. The max. pressure drop allowed in external oil cooler is 1.5 kg/cm
2
.
3. When applying an oil cooler with a compressor, please add appropriate refrigeration oil in accordance with the size
of oil cooler as well as the length of piping.
4. For RC2100/140/180, their oil circuit design is different from others. These models don’t use the oil stop pin for
external oil cooler application. If you find the oil connector (inlet/outlet) installed on the compressor, this means the
oil needs to flow out from the oil outlet connector and flow in to the oil inlet connector. If you don’t use external
additional cooling, you should simply see a cover plate on this position which means the oil will pass this internal
tunnel and way up to the cylinder and bearings. Please refer to the illustration below.
Figure 66 Internal oil circuit application Figure 67 External oil circuit application
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