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Air Requirements
Each engine is equipped with a high water temperature
shutdown switch automatically shuts down the set if
operating temperatures climb too high. To prevent the
generator set from shutdown, make sure the
compartment openings are large enough to allow
adequate circulation of the cooling and combustion air.
The minimum free-air opening in the compartment is
shown in Figure 6-6. Remember louvres, screens, and
protective grill work restrict effective air flow. Even a
simple, relatively open mesh screen, as shown in
Figure 6-7, will restrict air flow as much as 45%.
Increase the intake openings to compensate for such
restrictions. Air inlet and discharge openings for in-line
radiator-mounted models are shown in Figure 6-8 and
Figure 6-9.
15 kW Remote Radiator
15 kW In-line Radiator
20 kW Remote Radiator
20 kW In-line Radiator
Figure 6-6. Min. Air Requirements
sq. in. (sq. cm.)
6-6 Installation
Air
Air
Inlet
Outlet
140
(903)
216 (1393)
430 (2775)
330 (2128)
140
(903)
216 (1393)
430 (2775)
330 (2128)
1
1. Wide mesh screen
Figure 6-7. Inlet Screen
Remote and in-line radiator generator sets will require
an air outlet in the compartment floor and an air inlet in
the generator-end wall. See Figure 6-11 for proper
sizes and positions.
An additional 3 in. (7.62 cm)
diameter hole is required in the compartment so
combustion air from the outside of the compartment can
be brought into the air cleaner using a 2 in. (5 cm) I.D.
hose.
Install two supplemental cooling fans, capable of 265
3
cfm (7.49 m
/min) each, to supply adequate air to the
generator compartment.
Seal the air inlet openings, at the engine in-line radiator
and/or generator-end bracket, against the compartment
wall. This is to make sure that only exterior air is drawn
into the generator compartment.
560567
NOTE
NOTE
TP-5605 4/97
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