C) Mounting; D) Dc Output Wiring - NewMar PT-24-20W Installation & Operation Manual

Vertical mounting is preferred in order to allow the
dripshield to protect the charger from any moisture which
may fall onto the charger. However, vertical mounting
is acceptable since the charger is forced-air cooled. It
should not be located where there is a possibility of debris
being drawn into the unit through the fans.
If the charger is located in an extreme heat area, such as
an unventilated engine room, and the cooling fans are
unable to maintain proper operating temperature, output
power will automatically be reduced to protect the
charger. For maximum performance, the charger should
not be located in an area of extreme high temperature.
IMPORTANT: Although the charger is constructed of
materials and in a manner which make it highly resistive
to the corrosive effects of moisture in the environment,
the charger is not waterproof. Do not mount the charger
where there is a possibility of water entering the unit.
Evidence of water entry into the charger will void the
warranty.

C) Mounting

The charger may be mounted on either a metal or non-
metal surface*. You will require four screws (wood or
machine screws, depending on mounting surface) with
washers, sized for _" holes, to mount the charger, plus two
temporary holding screws. Note that, in addition to the
four permanent mounting holes in the flanges, there is a
hole in each mounting flange which is "keyhole" shaped.
This is provided to ease vertical installation.
*To comply with ABYC DC chassis grounding conductor
(ABYC A-20), connect a suitable sized wire to the _"-20
chassis grounding stud near AC cable feed through.
Make a mark on the wall or bulkhead where each of the
keyhole slots will be located. Then drive a screw about
half-way in at each of these marks. Hang the charger
onto the bulkhead using the "keyhole" slots. Doing this
will save you from having to support the charger's weight
while you are driving in the four permanent mounting
screws. Note: The "keyhole" slots may be used for
additional support screws but they are not to be used as
permanent mounting points, by themselves.
D) D.C. Output Wiring
Note: Only qualified service personnel should access the
output terminals of the charger.
Whether working with existing battery charger output
wires or installing new ones, make sure the battery(s) is
disconnected from these wires before connecting them to
the charger's output terminals.
For a secure installation D.C. output wires must be
attached with 1/4" crimp ring lug terminals sized
appropriately to fit wire gauges as listed below.
The D.C. wire size table below may be used to determine
the correct gauge wire, based on the model you have
and the length of the wire run from the charger to the
batteries. Once the output wiring has been attached to
the chargers output posts, install the clear plastic terminal
cover provided with the charger.
5
P.O. Box 1306, Newport Beach, California 92663 • Phone: 714-751-0488 • Fax: 714-957-1621 • E-Mail: techservice@newmarpower.com
Model
PT-24-20W
PT-40W
* Based on ABYC 3% voltage drop table and NEC minimum
FIGURE 1:
Simple D.C. Wiring (Preferred Method)
Optional
Temperature
Compensation
Sensor
See page 16 for
installation. Use
provided cable
clamps to secure
probe cable.
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
DC Wire Size Table
Distance from batteries, feet
10 15
Wire Gauge AWG (mm)
#10 (6mm) #10 (6mm)
#6 (16mm) #4 (25mm)
wire size chart
Phase Three
Battery
Charger
Battery
1 2 3
AC Input
Battery
2
20
#8 (10mm)
#2 (35mm)
Battery
3