Model: NP-24
24 Volt
Installation / Operation Manual
General Information
The NAV-PAC protects electronics from voltage spikes, power
surges, momentary power losses, abrupt voltage changes and
noise interference on incoming DC power to MDTs, GPS, and
other onboard Electronics prone to memory loss or “crashes”.
NAV-PAC is a solid state device which provides “pure” power
to navigation electronics by performing several essential
functions.
1) Voltage Spike Protection:
Engine cranking, pump and
motor operation send voltage “spikes” through a mobile
electrical system that often “bulldoze” their way through
the electronic circuitry. NAV-PAC eliminates this ruinous
condition.
2) R.F. Noise Filtering:
The NEWMAR NAV-PAC contains
a four-element low-pass LC filter which provides very high
radio freqency attenuation in both positive and negative
power leads to the receiver preventing noise from adversely
affecting signal reception and related operation.
3) Back-Up Power:
A long-life, completely sealed “Dry Battery”
pack is built-in the NAV-PAC which acts as a power reservoir
and is charged from the onboard 24 Volt power. In the event
of a drop in DC voltage due to engine cranking or total power
interruption, the battery will maintain power to navigation
and communication equipment for a short period of time.
This is essential for preventing memory or data loss.
4) Timed Disconnect Circuit:
This circuit prevents damage to
the internal battery from extreme discharge by disconnecting
the NAV-PAC battery approximately 15 minutes after abrupt
drop or complete loss of DC input.
5) Low Battery Disconnect Circuit:
This circuit prevents
damage to the internal battery from extreme discharge
by disconnecting the battery whenever battery voltage
reaches 10.2 VDC
Materials Provided
Your NAV-PAC comes with the following materials:
(4) #8 ring lugs for 10-12 guage wire
(1) Installation/Operation Manual
Check to see that these items have been included with the
packaging. For any missing items, please contact factory.
Installation
1) After you have determined the best location in the system,
locate a flat surface close to the power line that feeds the
GPS or MDT. For best results, the NAV-PAC unit should be
within 24” of the critical electronics. The case need not be
grounded, so it is acceptable to mount the unit to wood or
metal. Securely mount the NAV-PAC.
Turn off power to the wires that will be cut or worked on by
disconnecting the battery or shutting off the appropriate
circuit. Identify the positive and negative lead in the power
line and cut at an appropriate location. Use the lugs supplied
to hook up the NAV-PAC to your system.
2) Using the table below, select the proper wire size for your
installation.
AMPS*
CABLE LENGTH (feet)
10’
15’
0 - 10 AMPS
14 AWG
12 AWG
10 - 15 AMPS
12 AWG
10 AWG
*Current draw of equipment being powered.
Replace terminal block cover to prevent accidental shortings
the terminals.
Important Installation Note:
If thre is to be a continuous load
on the NAV-PAC output during normal operations, the DC
input must be a minimum of 26.8 VDC to prevent discharge
of the internal battery.
