Hunter H31 - Page 93

Hu
nt
e
r
31
• D
C
Electric
7.
3
E
ach batter
y
bank is wired to a batter
y
selector switch
located under the chart table. A circuit breaker “DC Main”
o
n the batter
y
switch panel connects the batteries to the
e
lectrical s
y
stem. The batteries suppl
y
power,
f
irst to
the batter
y
selector switch then to the 12 Volt DC Panel
which distributes power to such equipment as cabin
li
g
hts, instruments, and accessories.
The ne
g
ative terminal o
f
all banks are attached to the D
C
G
round connection on the en
g
ine. This s
y
stem, known as
the ne
g
ative
g
round s
y
stem, is the approved s
y
stem for
marine D
C
electrical s
y
stems. The batter
y
wirin
g
s
y
stem
has two color coded wires. The
y
ellow wire is the
g
round
(
ne
g
ative
)
, and the red wire is
(
positive
)
.
To avoid explosions, do not use
j
umper cables and a
booster batter
y
to start the en
g
ine. If batteries are dead,
then remove and rechar
g
e them ashore
.
B
atter
i
es pro
d
uce
hyd
ro
g
en an
d
ox
yg
en
g
asses w
h
en
the
y
are bein
g
char
g
ed. These explosive
g
asses escape
throu
g
h the vent
/f
ill caps and ma
y
f
orm an explosive
atmosphere around the batter
y
if ventilation is poor. This
g
as ma
y
remain around the batter
y
f
or several hours a
f
ter
c
har
g
in
g
.
S
parks or
f
lame can i
g
nite the
g
as and cause
an ex
pl
os
i
on
.
The
f
ollowin
g
precautions must be taken
:
The wirin
g
to the batteries must have proper over
current protection in the
f
orm o
f
f
use or breakers
.
U
se onl
y
batter
y
char
g
ers that have been listed b
y
a
testin
g
a
g
enc
y
, such as Underwriters Laboratories,
I
n
c.
Follow the wirin
g
dia
g
rams exactl
y.
T
o remove the batter
y:
Turn off all power drawin
g
breakers and isolate bat-
t
er
y
.
R
emove ne
g
ative
(
-
)
cable first, then the positive
(
+
).
When
y
ou install a batter
y
, the batter
y
connections must
b
e ma
d
e proper
ly.
Attach the positive cable to the positive
(
+
)
terminal
o
n t
h
e
b
atter
y.
Attach the ne
g
ative cable to the ne
g
ative
(
-
)
terminal
•
•
•
1.
2.
1
.
2
.
o
n the batter
y.
Note: Batteries should always be removed and installed by
trained, qualified persons to avoid all damages.
Table 1 Recommended Batteries
(
or equivalent
)
7.2.2 Batter
y
Switch Panel
Th
e
b
atter
y
b
an
k
s are connecte
d
to a
b
atter
y
se
l
ector
switch
(
Fi
g
. 7.1 shown without optional inverter
)
located
u
n
de
r th
e
c
h
a
rt t
ab
l
e
.
The selector switches are marked as to which batter
y
the
y
control. Turnin
g
the selector switch to the
Off
posi-
tion turns
p
ower off to the res
p
ective circuits, likewise, the
O
n position turns power on.
Fi
g
ure 7.
1
The batter
y
switch panel houses the breakers
f
or some
o
f the main components in
y
our DC s
y
stem. The breaker
c
ontrols are marked at the switch panel, and control s
y
s-
tems or components on
y
our boat that require a connec-
t
i
on t
h
at rema
i
ns ener
gi
ze
d
even t
h
rou
gh
t
h
e
M
a
i
n
P
ane
l
ma
y
be de-ener
g
ized
.
Th
e
b
rea
k
ers an
d
sw
i
tc
h
es are
d
escr
ib
e
d
i
n
g
reater
d
eta
il
in the
“
Breakers and
S
witches” section o
f
this chapter
.
M
F
G/
PN
G
roup
S
iz
e
Vo
lt
s
Q
t
y
Exi
de
Pr
e
-
v
a
il
e
r PV-
31
31
1
2
2