Kohler Generator Sets 20--2800 kW User Manual download pdf (Page 24)

TP-5700 7/9312 Section 4 Air Requirements

In many installations it may be desirable to install

louvers in the inlet and outlet openings. Louvers may be

either stationary or movable. In areas of great

temperature variation, it is often best to install movable

louvers that can be thermostatically adjusted to regulate

air flow and room temperature. See Figure 4-3 and

Figure 4-4.

If the set is to be installed in an atmosphere highly

contaminated with impurities such as dust, chaff, etc., it

may be necessary to install a filter in the inlet opening.

Furnace-type filters have been very satisfactory. Again,

a certain amount of air flow is lost that must be

compensated for by increasing the size of the opening.

The following are minimum air inlet and outlet

recommendations:

1. If louvers are used, the size of the opening should

be increased approximately 50%.

2. If window screening is used, the opening should

be increased approximately 80%.

3. If furnace filters are used, the opening should be

increased 120%.

4.2 Air-Cooled Generators

Air-cooled generator sets are available with three basic

types of air cooling systems that are discussed

separately on the following pages. For air-cooled

models 4 kW and smaller, size the air inlet and outlet

openings at least 1 square foot (0.092 m

). For larger

sets determine inlet and outlet size on the basis of 0.25

square feet (0.023 m

) for each 1000 watts of capacity.

A 5000-watt set, for example, requires inlets and outlets

of 1.25 square feet (0.115 m

) each:

0.25 cu. ft. x 5 kW = 1.25 cu. ft.

(0.023 m

x5kW=0.115m

)

Air requirements are listed in each model’s specification

sheet. Remember to increase the size of openings for

louvers, screens, filters, etc. as described earler in this

section.

Figure 4-3 Stationary Louvers for Air Inlet

Figure 4-4 Movable Louvers For Air Inlet

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Kohler Generator Sets 20--2800 kW User Manual Page 24

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