Kohler 15ERG manual Cooling System, Air Requirements, Block Heaters, High Water Temperature Switch

Section 3 Cooling System

3.1 Air Requirements

Air flow around the generator set is necessary for adequate cooling. See the current generator set specification sheet for air requirements. The air intake silencer/cleaner provides combustion air to the engine. See Figure 3-1 for allowable intake restriction. The engine/generator performance will be adversely affected if these guidelines are neglected. Follow these guidelines to optimize generator set performance.

Model	Normal Intake Restriction
10/13/15ERG	0.06 psi (0.50 in. H2O)

Figure 3-1 Intake Restriction

3.2 Block Heaters

Block heaters are available as installed accessories on these generator sets. Use block heaters in applications where the generator set is subject to temperatures below 16_C (60_F). Connect the block heater to a power source that is energized when the generator set is not running.

Note: Block heater damage. The block heater will fail if the energized heater element is not immersed in coolant. Fill the cooling system before turning on the block heater. Run the engine until it is warm and refill the radiator to purge the air from the system before energizing the block heater.

3.3 High Water Temperature Switch

Each generator set includes a high water temperature shutdown switch that automatically shuts down the set if operating temperatures climb too high. Follow the guidelines described in Section 3.1 to prevent shutdowns.

3.4 Unit-Mounted Radiator Cooling

The generator set is equipped with a unit-mounted radiator common cooling system.

3.4.1System Features

The system’s major components include an engine-driven fan and circulating water pump, a radiator, and a thermostat. The pump circulates water through the engine until it reaches operating temperature. Then, the engine thermostat opens, allowing water circulation through the radiator. The thermostat restricts water flow as necessary to prevent overcooling. The fan blows air from the engine side of the radiator across the cooling surface.

TP-6335 9/04 Cooling System 5