E) Multiple Unit Parallel Wiring; F) Ac Input Wiring - NewMar PT-24-20W Installation & Operation Manual

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.

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.

F) AC Input Wiring

NOTE: (For marine applications) THE INSTALLATION AND
PROTECTION OF VESSEL WIRING ASSOCIATED WITH BATTERY
CHARGERS SHALL COMPLY WITH ABYC STANDARDS E-11) AC
& DC ELECTRICAL SYSTEMS ON BOATS, AND A-31) BATTERY
CHARGERS & INVERTERS
These models are provided with an IEC certified AC cord which
may be plugged into the charger and a proper outlet. If the plug
is not suited to the available outlet, 1) obtain an IEC cord with
appropriate plug or 2) obtain the correct plug for the outlet and
install it on the provided IEC cord. When installing the plug, pay
careful attention to the pin wiring as follows:
Brown.....................................................AC Hot (fused)
Blue.........................................................AC Neutral
Green (or Green with Yellow Stripe...AC Ground (safety/earth)
As shipped from the factory, the charger is set up for 230 VAC
input. For 115 VAC applications, you must:
1) Slide the recessed 115/230 input select switch located on the
left hand side of the charger to the proper position. Positions are
identified on the front of the charger.
2) Replace the input fuse as explained in section
3) Input Fuse Replacement. The correct fuse for 115V applications
is the ABC-12 and it is attached to the hang tag on the BATT. 1
terminal of the charger. If it is missing, see the INPUT/OUTPUT
FUSE VALUE table in the SPECIFICATIONS sections of this manual to
determine the correct fuse value. Warning: Do not replace the gray
slotted cap of the fuse holder without a fuse installed. It will not be
retrievable. If this occurs, contact factory
7
P.O. Box 1306, Newport Beach, California 92663 • Phone: 714-751-0488 • Fax: 714-957-1621 • E-Mail: techservice@newmarpower.com
A power cord cable clamp has been provided to prevent
accidental disconnect of the AC cord. After the plug has been
inserted into the charger, snap the pre-formed clamp around the
AC input cable as close to the insertion point as practicable and
use a screw to fasten the clamp tightly to the wall or bulkhead on
which the charger is mounted.
Hard-wiring AC Input
If desired, the AC input to your charger may be hard-wired
directly to the AC distribution panel. Install the charger end of the
provided input cord as described above, then cut off the plug and
splice onto three conductor marine-grade cable with crimp but
connectors, observing color codes and fuse/circuit breaker ratings
as above. For all models, use minimum 16 AWG cable.
All charger wiring should be made in accordance with UL, U.S.
Coast Guard and/or ABYC regulations and recommendations,
as well as all relevant local codes. See REFERENCE APPENDIX for
sources.
AC input for the charger must be plugged into an appropriate,
over-current protected three prong outlet OR routed through a
separate dedicated fuse or circuit breaker on an AC distribution
panel with proper safety/earth chassis ground in accordance with
all local codes and ordinances.
CAUTION (230 VAC applications only): If AC input is derived from
a source consisting of two HOT leads (phase-to-phase 230 VAC
input voltage), an external fuse or circuit breaker must be used to
protect the unfused (formerly NEUTRAL, now HOT) lead.
3) Input Fuse Replacement
The AC input of your charger is protected by an input fuse. The
input fuse holder is located near the bottom of the unit on the left
side. The proper value for the input fuse is indicated on the lower
left corner of the front panel (230V, ABC-6A FB; 115V, ABC-12A
FB). If the input fuse needs replacing, it must be replaced with the
proper type and value. Use standard or fast-blow fuses. Never use
a slow-blow fuse.
Caution: Ensure that AC power to the charger has been
disconnected before attempting to open the fuse holder. To remove
the fuse for replacement, insert a flat tip screwdriver into the fuse
holder cover and turn clockwise until the spring-loaded cover
releases. To replace the fuse holder cover, depress it fully into the
fuse holder and turn it clockwise until it locks into position (about
quarter turn). Warning: Do not replace the gray slotted cap of the
fuse holder without a fuse installed. It will not be retrievable. If this
occurs, contact factory.
All charger wiring should be made in accordance with UL, U.S.
Coast Guard and/or ABYC regulations and recommendations,
as well as all relevant local codes. See section IX) REFERENCE
APPENDIX for sources.
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