Electrical Connections - Kohler GM87448 Operation

2.4 Electrical Connections

Do not add extensions to the DC output leads. Extending the leads will degrade the battery charger performance and shorten
battery life.
If reconnecting or servicing the battery charger, use the diagrams for 12 V and 24 V Systems. The diagrams show several
connection possibilities depending on the system voltage and number of chargers.
1. Before making the connection between the battery charger and the system
a. Read and follow the safety precautions in the Safety Precaution section.
b. Read and follow the accidental start safety precautions to protect against unexpected starts.
c. Confirm that the generator set has been removed from service.
d. Confirm that the AC and DC system are switched off by removing the AC cord from the power outlet.
e. Never allow the ring terminals to touch each other.
2. Check the polarity of the battery posts. The positive (+) battery post usually has a larger diameter than the negative
(-) post.
3. For 12 VDC systems, attach the black (negative) ring terminal first from the battery charger to the negative post of the
battery; then, attach the red (positive) ring terminal from the battery charger to the positive post of the battery.
Note: For 24 VDC systems, follow the appropriate diagram in the System Diagrams when attaching the battery
charger output leads to the battery posts.
4. Connect the engine wiring harness to the communication port on the battery charger. See the 12 V and 24 V System
diagram.
Note: An engine harness adapter is required to connect two battery chargers to the engine harness.
5. If the temperature sensor kit is used:
a. Plug the temperature sensor connector into the temperature sensor port on the battery charger.
b. Connect the temperature sensor to the negative terminal on one of the battery(ies).
c. Use zip ties to secure the wiring harness. Make sure that the leads do not contact any hot surfaces or sharp
edges.
Note: To enable temperature compensation, the parameter, Charger Temperature Compensation Enable, must be
set to Active. Temperature Compensation is only available for with flooded lead acid (FLA) batteries.
6. Plug the power cord into an electrically grounded, 120 VAC, power outlet.
Note: The AC power connection must comply with national and local electrical codes.
7. To check the controller settings, use SiteTech™ or the controller menus to verify that the battery charger parameters
match the battery manufacturer's recommendations. Refer to the section on SiteTech™ Settings.
Important: Incorrect charger output system voltage may cause irreversible damage to the battery and abnormal out
gassing. Ensure that the battery charger parameters match the battery manufacturer's specifications
before using.
8. Restore the generator set to service.
Note: When disconnecting the battery charger, first disconnect the AC power cord, then remove the black (negative) ring
terminal from the negative battery post. Remove the red (positive) ring terminal from the positive battery post last.
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