Kohler 15ERG, 13ERG, 10ERG manual Planning, Clearance Requirements, Exhaust Piping, If Used

4.1 Planning

Carefully plan the generator exhaust system to ensure a safe, quiet installation. Verify that the installation complies with all state and local requirements and applicable articles of the codes listed at the beginning of this manual.

4.2 Clearance Requirements

Kohler Co. recommends a minimum clearance of 38 mm (1 1/2 in.) between the exhaust system parts and the fuel system, the electrical system, and all combustible components to protect the generator set components and to avoid igniting adjacent combustible materials.

4.3 Exhaust Piping, If Used

Route the exhaust piping to maintain minimum clearances and to minimize exhaust piping bends. Use a tail pipe as short as possible with as few bends as possible to reduce back pressure. Design the exhaust piping to prevent excessive back pressure of the unit-mounted muffler, if equipped. See Figure 4-1 for the allowable exhaust back pressure. Do not apply weight or pressure to the unit-mounted muffler, otherwise premature exhaust-system damage will occur. Adding exhaust-pipe extensions to the unit-mounted muffler may cause excessive vibration and noise transmitted to the vehicle.

For generator sets without a unit-mounted muffler, install a muffler made of aluminized steel or other corrosion-resistant material of welded or crimped construction.

	Allowable Exhaust
Model	Back Pressure
10/13/15ERG	< 10.2 kPa (3.0 in. Hg)

Figure 4-1 Allowable Exhaust Back Pressure

8 Exhaust System TP-6335 9/04