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West Mountain Radio
Operating Manual
Safety Precautions
Auxiliary Battery Choices:
1. When using an automotive battery, it should be mounted in the trunk or un-
der the hood. Do not place it in the passenger area of the vehicle. These
unsealed batteries will emit gases that are dangerous in a closed area.
2. If using a sealed lead acid battery, it can be placed internally. The AGM,
glass mat type is a good choice. It has a charging voltage that is similar to
the car’s alternator voltages.
3. If using a GEL type battery, it also can be placed internally. However, con-
firm that the alternator voltage does not exceed 14.5 volts (at 70 degrees F).
This will ensure full life for the GEL cell.
Fuses
A fuse must be placed in the wire at the battery terminals connecting to the car’s
battery. A 40 ampere fuse is recommended. This safety precaution is neces
-
sary because the battery is a large power-storage device that, if shorted, would
release a massive amount of energy, sometimes causing the battery to explode.
ISOpwr Installation Checks
After installation, verify the ISOpwr for proper operation.
1. With the engine OFF, make sure the ISOpwr green LED is off.
2. Start the engine. After a few seconds the Green LED will illuminate showing
the car is now connected to the auxiliary battery and/or the radio equipment.
Make sure that the radio also turns on.
3. Turn off the engine. The green LED will stay on for a while because the
car’s battery may be above 12.6 volts. After a few minutes the car’s battery
will have dropped to less than 12.6 volts and the ISOpwr will turn off.
Note: To rapidly drop the car’s battery, switch on the car headlights.
