NewMar PT-24-20W Installation & Operation Manual page 6

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
6
P.O. Box 1306, Newport Beach, California 92663 • Phone: 714-751-0488 • Fax: 714-957-1621 • E-Mail: techservice@newmarpower.com
FIGURE 2: Wiring With Battery Switch
Optional
Temperature
Compensation
Sensor
See page 16 for
installation. Use
provided cable
clamps to secure
probe cable.
Master
Battery
Switch
TCS
Battery
1
* Per ABYC A-31: A D.C. chassis grounding conductor shall be
connected from the case of the battery charger to the engine
negative terminal or its bus, and must not be more than one size
under that required for the D.C. current carrying conductor
and not less than 16 AWG.
Note: This diagram does not illustrate a complete system. Refer to
ABYC standards E-11 AC & DC electrical system on boats
Important: Install fuses at batteries per ABYC recommendations
www.newmarpower.com
Phase Three
Battery
Charger
Battery
1 2 3
AC Input
Loads
+ Buss
Battery
2
- Buss
Battery
3