Hanbell RC2-1020AV, Manual

Page: 58 / 62

57
Air-cooled oil cooling (cooling by ambient air):
The basic air-cooled oil cooling system is shown in Figure 46. This method of cooling is indirect cooling which uses
ambient air to cool down the oil, which circulates in the oil cooler.
Figure 46 Oil cooling by ambient air
Water-cooled 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. Once-through 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 water-cooled oil cooling system is shown in Figure 47.
Figure 47 Oil cooling by water
Note:
1. Please decide appropriate oil cooler capacity by referring to HANBELL selection software.
2. Maximum pressure drop allowed in external oil cooler is 1.5 kg/cm
2
. When it exceeds 1.5kg/cm
2
, clean or change
oil filter.
3. When applying any oil cooler to compressor, please add appropriate refrigeration oil in accordance with the size of
oil cooler and the length of piping.
4. For RC2-100/140/180AV, the oil circuit is different to 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
In the oil cooler, fan is
controlled by oil
temperature of the oil outlet
of compressor.