Mainship 40 Trawler Single Operator's Manual - page 81
Mainship 40 Trawler Single & Twin • DC Electric Systems
7.5
Figure 7.8 DC Distribution Panel
As you can see in Fig. 7.8, the DC Distribution Panel is
divided into sections:
Section A - This section is devoted to monitoring the DC
power.
Section B - These are your breakers that control various
components aboard your boat.
Section C - This is the bilge pump section, the fwd, mid,
and aft bilge pumps have manual modes that allow you
to turn them on, here you will find the switches to go from
automatic to manual mode.
Section D - This is your Shower Sump indicator light, the
shower sump (discussed in the Waste Section) , when
activated will illuminate this green light to allow you to
acknowledge the operation.
Section E - This is the reset for your CO Monitor
Section F - This is the generator controls. If your boat
is equipped with a generator, there will be a “preheat,
start/stop”, and “on and off” switch here.
7.2 Systems and Components
There are many systems and components on the DC
side of your boat from emergency and safety to enter-
tainment, these systems make up the largest part of your
electrical system.
Here we will discuss the electrical parts of those systems
and try and give you a better understanding of the uses
and features of your DC electrical systems and compo-
nents. Since the largest part of your controls are at the
MDP, we will start there and run down the systems and
components as they are listed on the MDP, from there
we will look at the battery switch panel, and finally the
helm controls.
7.2.1 DC Main
In order to energize the DC system aboard your boat,
besides the battery switch you must turn the breaker
marked “DC Main” to the on position. This supplies
power to the remaining breakers and systems on the
MDP. However you do not have to energize the DC Main
to have power to the DC switches and breakers at the
helm.
7.2.2 Raw and Fresh Water Breakers
The breakers at the MDP marked “Raw Water”, and
“Fresh Water Pump” control power to these two sys-
tems. The fresh water pump will not operate since this
is a pressurized system and the pressure on the system
is a pressu
uriz
has to fall below a specified point in order to activate the
l
pump. On the raw water side the pump is active and run-
ning when you energize the breaker.
7.2.3 Refrigerator
The breaker marked “Refrig” supplies power to the DC
powered refrigerator aboard your boat.
7.2.4 Lighting Systems
There are basically four different lighting systems aboard
your boat. These are the Interior and Exterior lighting,
the safety and navigational lighting, and if supplied the
courtesy lighting.
The interior and exterior lighting systems are are pow-
ered from the MDP and are labeled.
A
B
C
D
E
F
B