National Luna NLDC-25, Owner'S Manual

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The NLDC-25 should be located close to the auxiliary battery for best voltage regulation.

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The NLDC-25 can operate in harsh environments but it is best installed in a location that is cooler with adequate ventilation. 

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Avoid areas exposed to harsh or corrosive chemicals, excessive dust, extreme heat or mechanical movement.

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The NLDC-25 can be installed vertically or horizontally.

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Do not block or obstruct the cooling fins on the NLDC-25. 

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Allow clearance around the NLDC-25 for cables and ventilation.

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It is normal for the NLDC-25 to get hot during operation, keep any objects that are heat-sensitive away from the NLDC-25.

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If the temperature compensation probe is used, it must be able to reach the auxiliary battery.

2

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It is recommended to use 16mm  cables for connections to the main and auxiliary batteries. Smaller gauge cables can be used for short 
distances.

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In-line fuses must be fitted in the positive cables close to the respective main and auxiliary batteries.

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Use the common ground connections on the terminal block for all negative cable connections.

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Use appropriate cable lugs for the cable size used.

Preparing for Installation

Removing the top cover

3

In order to select the battery type and to install the 
temperature compensation & ignition over-ride 
wires, the top cover will need to be removed.

Loosen the two screws as indicated in order to 
release the cover.