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connected from the case to the battery charger to the engine
negative terminal or its bus, and must be no more than
one size under that required for the D.C. current carrying
conductor and not less than 16 AWG
Note: The diagram Figure 1 does not illustrate a complete
system. Refer to ABYC standards E-11 AC & DC electrical
system on boats.
Note: If batteries are closer to charger than battery switch,
wire directly to battery posts.
It is recommended that DC wiring from the charger to the
batteries be as direct as possible. Line voltage loss and
electronic noise interference of sensitive electronics are
possible if the charging leads are routed through a central
electrical distribution panel. Any elaborate configurations
are best left to a qualified electrician.
ENSURE THAT LEADS ARE PROPERLY FUSED AT THE
BATTERY. (REFER TO ABYC RECOMMENDATIONS. SEE
REFERENCE APPENDIX AT THE END OF THIS MANUAL
FOR ABYC CONTACT INFORMATION.)
Ensure that your connections are tight and that correct
polarity is carefully observed at all times. The battery
posts should be free of any rust or corrosion.
IMPORTANT NOTE: EVEN MOMENTARY REVERSE
POLARITY CONNECTION MAY SEVERLY DAMAGE YOUR
CHARGER. THE POSITIVE (+) TERMINAL MUST BE WIRED TO
THE POSITIVE POST OF THE BATTERY AND THE NEGATIVE
OR COMMON (-) TEMINAL TO THE NEGATIVE POST OF
THE BATTERY OR COMMON BUS.
CAUTION: Do not attempt to increase battery bank
capacity by splitting the output of one of the banks with
a diode-type battery isolator. Undercharging may occur
on the output bank, as a result.
If you wish to add another isolated battery bank, use of
NEWMAR's Battery Integrator is recommended. Contact
the factory for details. Be sure to replace the clear plastic
terminal cover to prevent accidental shorting of the output
terminals in the future.
An Important Note about the DC Output Fuse(s): internal
DC wiring is protected by the internal DC output fuse(s). The
current limiting circuit of the Phase Three Charger should
prevent these fuses from blowing under normal operating
conditions. If the DC fuse(s) blow, this may indicate a
reverse polarity hook-up or an internal short.
Always disconnect AC to the charger before checking
fuses. To check or replace the DC fuse, the cover must be
removed. To do this requires removal of four screws from the
front of the unit and three screws on each side. The DC fuse
is mounted on the main circuit board. Be sure to replace
with the same type and value as indicated on the fuse.
If the battery was connected to the charger backwards,
the fuse should blow to protect DC wiring, however
damage to internal components may also have occurred.
If the replacement fuse blows, return the charger to an
electronics service professional or to the factory for a
thorough inspection.
Note: The internal fuses do not provide protection if there is
a short in the wiring between the charger and the battery.
The battery is itself a power source and charging leads
should be fused at the battery per ABYC standards.
Figure 2: Wiring with Battery Switch
Optional Temperature Compensation Sensor.
8 for installation. Use provided cable clamps to secure probe
cable.
* Per ABYC A-31: A D.C. chassis conductor shall be
connected from the case of the battery charger to the engine
negative terminal or its bus, and must no be more than
one size under that required for the D.C. current carrying
conductor and not less than 16 AWG
Note: The diagram Figure 1 does not illustrate a complete
system. Refer to ABYC standards E-11 AC & DC electrical
system on boats.
E) Multiple Unit Parallel Wiring
If increased power or system redundancy is required, a
second charger may be wired in parallel. The unit is diode
protected so it will not be damaged by feedback from the
second unit and current limiting will prevent overloading
in the case of a failure of one of the units.
Observe the following guidelines when wiring a parallel
unit.
1) Use another identical charger model. Do not use a
different charger model, either from NEWMAR or from
another manufacturer.
2) Wire length and gauge and wire lug size must be
identical for each charger to ensure proper load sharing.
3) Wire gauge for each charger must be the same used as
if a single charger were wired into the system itself.
See page
6
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