Note: This diagram does not illustrate a complete system. Refer to ABYC Standards E-
8) AC Electrical Systems on Boats, and E-9) DC Electrical Systems on Boats, and A-20)
Battery Charging Devices.
IMPORTANT: Install fuses at batteries per ABYC recommendations.
Note: If batteries are closer to charger than battery switch, wire directly to
battery posts.
It is recommended that d.c. 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 SEVERELY DAMAGE YOUR CHARGER. THE POSITIVE (+) TERMINAL
MUST BE WIRED TO THE POSITIVE POST OF THE BATTERY AND THE
NEGATIVE OR COMMON (-) TERMINAL 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
that output bank, as a result. If you wish to add another isolated battery bank, use of
NEWMAR’s Battery Bank Integrator is recommended. Contact the factory for details.
Be sure to replace the black plastic terminal cover to prevent accidental shorting of
the output terminals in the future.
FIGURE 3: WIRING WITH BATTERY SWITCH
*
* Note: d.c.
chassis
grounding
conductor
must not be
more than one
size under that
required for the
d.c. charging
conductors.
An Important Note about the d.c Output Fuse(s): internal d.c wiring is protected by
internal d.c. output fuse(s). The current limiting circuit of the Phase Three Charger
should prevent these fuses from blowing under normal operating conditions. If the
d.c fuse(s) blow, this may indicate a reverse polarity hook-up or an internal short.
Always disconnect a.c. to the charger before checking fuses. To check or replace
the d.c. 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 d.c. 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 d.c. 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.
F) Multiple Unit Parallel Wiring
Multiple PT-CE series chargers may be wired in parallel, if necessary. Either identical
or different models may be paralleled (12 volt models with 12 volt, 24 volt models
with 24 volt) They are diode protected against feedback from other units and current
limiting will prevent overloading. There are two main reasons why you may wish to
wire multiple units in parallel:
1) To meet the current requirements of very large capacity battery systems and/or
large d.c. loads— If, for instance, you require 110 amps for a 12 volt system, you
may wire a PT-70CE in parallel with a PT-40CE. FIGURE 4 shows a typical wiring
scheme of this sort. Note: If the temperature compensation option is used, a separate
sensor must be provided for each charger. (See section IV-E)
FIGURE 4: PARALLEL WIRING FOR LARGE CAPACITY BATTERY SYSTEMS
IMPORTANT: Install fuses at batteries per ABYC recommendations.
Note: This diagram
does not illustrate
a complete system.
Refer to ABYC
Standards E-8) AC
Electrical Systems
on Boats, E-9) DC
Electrical Systems
on Boats, and A-20)
Battery Charging
Devices.
Bank 1 Bank 2 Bank 3
PT-70CE
PT-40CE
*
*
* Note: d.c. chassis
grounding conductor
must not be more
than one size under
that required for the
d.c. charging
conductors.
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