MARLOW-HUNTER MH31, Operator'S Manual

Page: 121 / 267

DC Electric Systems
7.1
T
he purpose of this chapter is to provide information
necessary to understand and operate the DC electrical
system aboard your boat. This system comprises your
boat’s electrical components which are powered by bat-
tery. We will organize this section into the following top-
ics:
DC Power System and Component Overview
DC Power Supply and Control Components
DC System Components and Operation
Other DC System Components
General Maintenance
The purpose of this chapter is not to educate on the
repair or the expansion of the electrical systems. Nor is
its purpose to educate on the basics of electricity. Again,
the purpose is to provide you with the information to
safely operate and maintain the DC electrical system.
WARNING
! !
Electricity cannot be detected without the use of
specialized test equipment. Never think you know
whether a circuit is “live”. Always have qualified,
competent professionals inspect or make repairs to
your electrical systems.
WARNING
! !
Do not rely on the information in this manual as a
repair guide. As always, only competent electrical
service personnel should attempt to repair any elec-
trical equipment or to expand the electrical system.
Work performed by non-electrical service person-
nel may result in electrical shock or damage to the
boats systems or components.
7.1 DC Power System and Component
Overview
The source of power for the DC systems aboard your
boat are battery banks. The control of that power is found
in two individual master panels:
Name Location
1. Battery Switch Panel (BSP) Aft Cabin
2. DC Panel (DCP) Galley
1.
2.
3.
4.
5.
Additional panels can also be found on your boat but
only remotely control individual components, i.e. engines,
inverter, etc..
The individual systems controlled by these master pan-
els will depend on the options chosen on your boat.
Consequently, you may or may not have a switch/breaker
as noted in this manual. The following table lists the
systems, location and resettable breaker amperage for
the possible components installed on your boat’s master
panels:
System Panel Breaker (
AMP
)
DC Main BSP 50
Battery Charger (x2) BSP 40
Bilge Pump (Main) BSP 5
High Water Alarm / High
Water Bilge Pump (Op-
tion) BSP 10
CO Detectors BSP 5
Running Lights DCP 5
Anchor Light / Steaming
Light DCP 5
Cabin Lights DCP 5
Water Pump DCP 10
GPS / Chartplotter DCP 10
Instruments / Autopilot DCP 5
LPG Gas DCP 5
Refrigerator or Freezer
(x2) DCP 15
Sump Pump DCP 10
Head DCP 25
TV/DVD DCP 10
Stereo DCP 10
12V Outlets DCP 15
Tank Indicator DCP 5
Blower DCP 5
Figure 7.1
7.2 DC Power Supply and Control
Components
Please refer to Fig. 7.19 for the basic power supply
equipment and component layouts as reference for this