Kohler Generator Sets 20--2800 kW - Manual (Page 26)

TP-5700 7/93 14 Section 4 Air Requirements
4.4 Air-Vac
 Cooling System
The air flow direction with the Air-Vac
 system is the
opposite of the conventional forced air cooling system.
Use the Air-Vac
 system in confined areas since it
includes a blower scroll which easily connects to the
ductwork. For duct dimensions refer to the dimensional
drawing for your model. With Air-Vac
 cooling, air is
drawn across the generator end of the unit, into the
finned areas, and then out into the scroll located at the
front of the engine.The heated air is forced through
ductwork to the outside of the building. See Figure 4-6.
Note: Order Air-Vac
 cooling systems factory installed
since major components of the engine are
affected making it difficult and uneconomical to
install at a later time.
TP-5700-4
1
2
3
4
5
1. Air-Vac  scroll
2. Air inlet opening
3. Ductwork
4. Register type cover suitable for smaller sets
5. Flexible section
Figure 4-6 Air-Vac  Cooling System