27 Operator's Manual.. - Marlow-Hunter, LLC

Hunter 27 • DC Electric
The negative terminal of all banks are attached to the DC
Ground connection on the engine. This system, known as
the negative ground system, is the approved system for
marine DC electrical systems. The battery wiring system
has two color coded wires. The yellow wire is the ground
(negative), and the red wire is (positive).
To avoid explosions, do not use jumper cables and a
booster battery to start the engine. If batteries are dead,
then remove and recharge them ashore.
Batteries produce hydrogen and oxygen gasses when
they are being charged. These explosive gasses escape
through the vent/fill caps and may form an explosive
atmosphere around the battery if ventilation is poor. This
gas may remain around the battery for several hours after
charging. Sparks or flame can ignite the gas and cause
an explosion.
MFG/PN Group Size Volts Qty
Exide Prevailer
31 12 2
PV-31
7.2.2 Battery Switch Panel
The battery banks are connected to a battery selector
switch (Fig. 7.1 shown without optional inverter) located
under the chart table.
The selector switches are marked as to which battery
they control. Turning the selector switch to the Off position
turns power off to the respective circuits, likewise, the
On position turns power on.
The following precautions must be taken:
• The wiring to the batteries must have proper over
current protection in the form of fuse or breakers.
• Use only battery chargers that have been listed by a
testing agency, such as Underwriters Laboratories,
Inc.
• Follow the wiring diagrams exactly.
To remove the battery:
1. Turn off all power drawing breakers and isolate battery.
2. Remove negative (-) cable first, then the positive (+).
When you install a battery, the battery connections must
be made properly.
1. Attach the positive cable to the positive (+) terminal
on the battery.
2. Attach the negative cable to the negative (-) terminal
on the battery.
Note: Batteries should always be removed and installed by
trained, qualified persons to avoid all damages.
Table 1 Recommended Batteries
(or equivalent)
Figure 7.1
The battery switch panel houses the breakers for some
of the main components in your DC system. The breaker
controls are marked at the switch panel, and control systems
or components on your boat that require a connection
that remains energized even through the Main Panel
may be de-energized.
The breakers and switches are described in greater detail
in the “Breakers and Switches” section of this chapter.
7.2.3 Battery Charging System
Refer to the DC Wiring Diagram drawing at the end of
this section for the location of the battery charger. The
charger is protected by a fuse on the positive and ground
side at the charger.
7.3