Mainship 40 Trawler Single - Page 83

M
ainship 40 Trawler Sin
g
le & Twin • DC Electric S
y
stems
7.
7
CAUTION
! !
Fuel fumes in the en
g
ine compartment can explode.
Before workin
g
on electrical wirin
g
ventilate en
g
ine room
a
n
d
di
sconnect
b
atter
y
ca
bl
es to prevent spar
k
s.
There is an exhaust blower installed in the head, con-
tro
ll
e
d
by
a sw
i
tc
h
i
n t
h
e
h
ea
d
.
The en
g
ine room blower is an exhaust fan which will
remove an
y
exhaust fumes from the en
g
ine room, as
well as removin
g
heated air.
Th
e
bl
ower
i
n t
h
e
l
azarette area, or
g
enerator space
i
s a
s
uppl
y
f
an. It supplies
f
resh air to the
g
enerator
(
option
)
.
This blower fan is specific to the
g
enerator and will onl
y
be installed if the
g
enerator option is ordered.
7.2.12 Fire Extin
g
uishin
g
S
y
stems
Another component that is speci
f
ic to the
g
enerator is
the fire extin
g
uisher in the lazarette area. If
y
our boat
d
oes not
h
ave t
h
e
g
enerator opt
i
on t
h
en t
hi
s s
y
stem
i
s
n
o
t in
s
t
a
ll
ed
.
In the en
g
ine room there is another fire extin
g
uishin
g
bottle installed. This s
y
stem is D
C
powered, with the
rela
y
, or “module” and the alarm at the helm station.
When a fire is detected on
y
our boat, the alarm will sound
and set o
ff
the Halon bottles. This rela
y
will shut down
the en
g
ines, the blowers, and the
g
enerator. To reset the
sy
stem, act
i
vate t
h
e reset sw
i
tc
h
on t
h
e mon
i
tor at t
h
e
helm.
S
ee
f
i
g
. 7.1
1
Fi
g
ure 7.11 Fire Alarm Monito
r
7.2.13 Shower Sum
p
The shower sump is part o
f
the
S
anitar
y
Sy
stems and
more in
f
ormation about the
S
hower
S
ump can be
f
ound
in that section, however the breaker control for the show-
y
our safet
y.
The horns are D
C
powered and the controls are located
a
t th
e
h
e
lm.
7.2.10 Bil
g
e Pump S
y
stem
s
The Mainship 40 Trawler is equipped with 3 bil
g
e pumps
and one emer
g
enc
y
bil
g
e pump. For locations of the bil
g
e
pump s
y
stems consu
l
t
y
our
M
ec
h
an
i
ca
l
A
rran
g
ement
D
rawin
g
or the
S
anitar
y
Sy
stems Drawin
g
.
The Bil
g
e Pump S
y
stem consists of a pump and a float
s
witch. When the water level rises
f
ar enou
g
h to activate
the float switch this activates the pump which lowers the
water level down to a
p
oint that the float switch sto
p
s the
power. Fi
g
. 7.10 shows
y
ou the t
y
pical wirin
g
.
Fi
g
ure 7.10 Bil
g
e Pump S
y
stem
7.2.11 Ventilation
V
entilation is a ver
y
important issue with
y
our boat, with
the potential
f
or carbon monoxide buildup
(
see Boatin
g
S
afet
y
Section
)
alon
g
with the simple comfort of fresh
air or air conditionin
g
, ventilation is a standard that is a
necessit
y.
O
n
y
our Mainship 40 Trawler there are essentiall
y
three
t
y
pes o
f
ventilation, the air conditionin
g
s
y
stem
(
A
C
Sy
stem
)
, the exhaust or blowers, and the Bomar hatches,
which suppl
y
y
ou with
f
resh air when opened.
S
ince the
air conditionin
g
s
y
stem is A
C
powered
(
see A
C
Electric
S
ection
)
and the hatches require no power we will detail
the blowers
(
or exhaust
f
ans
)
, and their
f
unction here
.
F
or
bl
ower
l
ocat
i
on consu
l
t
y
our
M
ec
h
an
i
ca
l
A
rran
g
ement
Illustration in the Boatin
g
S
a
f
et
y
S
ection, or the Ventilation
Ill
us
tr
a
ti
o
n in th
e
sa
m
e
sec
ti
o
n.
B
a
C