Kohler Generator Sets 20--2800 kW User Manual download pdf (Page 33)

TP-5700 7/93 21Section 5 Exhaust System

Section 5 Exhaust System

Proper installation of the exhaust system is essential to

obtain satisfactory performance from a generator set.

The most important factor is that the installed system

must not exceed the engine manufacturer’s maximum

exhaust back pressure limit. Any exhaust back pressure

will limit the maximum power available from the engine.

Excessive back pressure may cause serious engine

damage.

Excessive back pressure usually results from one or a

combination of the following:

D Exhaust pipe diameter too small

D Exhaust pipe too long

D Too many sharp bends in the exhaust system

D Too small an exhaust silencer or incorrect silencer

design

Figure 5-1 and Figure 5-2 show the general

arrangement of recommended exhaust systems.

TP-5700-5

1. Supports

2. Pitch line downward

3. Muffler

4. Water trap

5. Drain petcock

6. Flexible section

7. Solid section 6--8 in. (152--203 mm)

8. Manifold

Figure 5-1 Exhaust System, End Inlet Silencer

Exhaust lines should be as short and straight as

possible. Schedule 40 black iron pipe is the

recommended material. Where possible, sweep elbows

with a radius of at least three times the pipe diameter

should be used.

The exhaust outlet must be located in a manner that will

prevent exhaust fumes from entering a building or

enclosure.

TP-5700-5

1. Exhaust wall thimble

2. Muffler

3. 45° Y fitting

4. Water trap

5. Drain petcock

6. Outer diameter adapter and clamp

7. Flexible section

8. Manifold

9. 45° elbow

Figure 5-2 Exhaust System, Side Inlet Silencer

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Kohler Generator Sets 20--2800 kW User Manual Page 33

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