National Luna NLDC-25, Owner'S Manual

Installation Steps

Selecting Battery Type

The NLDC-25 will optimise charge voltage based on the selected battery 
type.

Remove the NLDC-25 top cover to access the battery select button.

The battery type can be selected by pressing the “Battery” button on the 
NLDC-25 control panel. The chosen battery type is displayed.

Ÿ

Disconnect the main battery before starting installation.

Ÿ

Install the NLDC-25 using the mounting feet. 

(Described on page 4)

.

Ÿ

Install positive and negative cables from the Auxiliary battery to the NLDC-25. Connect to the AUX and GND terminals respectively.

Ÿ

Install one in-line fuse on the positive cable near to the Auxiliary battery. Do not connect the battery yet.

Ÿ

Install positive and negative cables from the NLDC-25 to the Main battery. Connect to the ALT and GND terminals respectively.

Ÿ

Install one in-line fuse on the positive cable near to the Main battery. 

Ÿ

If a solar panel is used, connect the positive and negative cables from the solar panel to the SOLAR and GND terminals respectively.

Ÿ

Connect the temperature compensation probe and IGN over-ride cable if used. 

(See page 8)

.

Ÿ

Install the remote monitor (if used) and run its cable to the remote monitor port on the NLDC-25. 

(See page 9)

.

Ÿ

Double check all cables and connections for correct installation.

Ÿ

Re-connect the Main battery. The NLDC-25 should now be powered and will show status on the status display.

Ÿ

Select the Auxiliary battery type. See “Selecting Battery Type” below.

Ÿ

Connect the Auxiliary battery.

Ÿ

If the remote monitor is installed, the voltages of the Main and Auxiliary batteries will now be displayed.

Ÿ

The system is now ready.

Wet

AGM / Gel

Ca+

Li-ion

Used for automotive Lithium-ion or LiFe 
batteries.

Used for regular automotive starting 
and flooded high-cycle batteries.

Used for flooded deep-cycle, calcium and 
maintenance - free batteries.

Used for all types of AGM and Gel 
batteries.

For safety reasons, the battery type cannot be changed if the 
AUX battery is already connected. 

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