13-21-616 v00 Page 13
Both the air-cooled and water-cooled units require cooling air as well as air to the compressor inlet. Proper
ventilation MUST be provided; hot air must be exhausted from the compressor operating area. A typical
inlet-outlet air flow arrangement is shown in Figure 2-1.
Figure 2-1 TYPICAL COMPRESSOR ROOM
Air-Cooled Units
- A combination oil/aftercooler is supplied as standard equipment on all air-cooled units.
The air-cooled unit with the standard enclosure requires sufficient flow, Figure 2-2, for the compressor
oil/after cooling system and for electric motor cooling. Air is drawn in on the motor side of the unit and is
exhausted through the roof on the separator side of the unit. Do not block the air flow to and from the unit. Allow
three and one-half (3-1/2) feet (1.1 M) to the nearest obstruction on the starter/control box end of the unit
along with all other sides of the unit. Allow four (4) feet (1.2 M) to the nearest obstruction above the unit.
For continuous efficiency, oil cooler cores must be periodically cleaned with either vacuum or compressed
air. If wet cleaning is required, shield motor and spray on a mild soap solution and flush with clean water.
Minimum Air Flow * For Compression and Cooling
Cubic Feet/Minute (Cubic Meters/Minute)
HP
Air
Cooled
Water Cooled
125, 150 & 200 HP
19800 (561)
4570 (129)
* 80
F (27
C) Inlet Air
Figure 2-2 AIR FLOW CHART