Kohler 7ER, Installation Manual

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TP-6034 10/02 8 Exhaust System
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 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. 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.
Model
Allowable Exhaust
Back Pressure
7ER < 1.42 psi (1000 mm H
2
O)
Figure 4-1
Allowable Exhaust Back Pressure