Jayco Legacy Fifth Wheel 2009, Owner'S Manual

Page: 36 / 132

SECTION 3
ELECTRICAL SYSTEM – 50 AMP
24
aftermarket generator, consult your dealer for
assistance.
12-
VOLT
DC S
YSTEM
The majority of your RV lighting is powered by
12 VDC electricity. The 12 VDC system is
composed of components that will operate
when the following conditions are met:
•
Power is supplied by the tow vehicle
alternator when the engine is running and
the 7-way trailer plug is connected. This
powers the RV’s running lights, brake
lights, turn signals and brakes. In addition,
the 7-way trailer plug provides a common
ground and a 12-volt charge line to charge
the auxiliary battery.
•
The converter will supply interior 12 VDC
power when the 50-amp power cord is
plugged into campground power. The
converter will also charge the auxiliary
battery in most situations.
•
The auxiliary battery powers many interior
12-volt components including the lighting
fixtures, water pump, 12-volt motors, 12-
volt appliances, etc. It also powers the
breakaway switch.
12-V
OLT
B
ATTERY
D
ISCONNECT
Your RV has a 12 VDC
master battery disconnect
switch, usually located in the
Cargo Maxx™ compartment.
To avoid draining your
auxiliary battery, turn this
battery disconnect switch off
when the RV is not being
used for a period of time.
When the battery disconnect switch is off the
12 VDC electrical system WILL NOT
PROVIDE power to the propane alarm. To
function correctly, the propane alarm must be
connected to a constant 12 VDC power
source.
T
OW
V
EHICLE
B
ATTERY
I
SOLATOR
You may want to have a solid-state battery
isolator installed on your tow vehicle starting
system as a convenience feature:
•
It receives current from the tow vehicle
alternator and controls distribution of
energy to both the auxiliary battery(s) and
the tow vehicle battery.
•
It serves as a check valve to prevent
energy from being drawn from your tow
vehicle chassis battery (so you can start
your tow vehicle engine).
Your dealer can assist you with the selection,
purchase and installation of this aftermarket
part.
A
UXILIARY
B
ATTERY
Your RV has many 12 VDC loads. When
combined, their total is more than the
converter can produce. High demands for 12-
volt power can be met by an auxiliary battery
for limited periods of time. The 12 VDC
electrical system is designed for usage with a
Group 24 or Group 27 deep cycle batteries.
To prevent damage, do not connect an
automotive style battery to your RV electrical
system.
A deep cycle battery is rated in amp/hours
(how many amps, for how long, you can draw
from your deep cycle battery before it is
discharged). Deep cycle batteries are
designed to be discharged over and over
again and still take a charge. If you enjoy dry
camping (without hook-ups) you will depend
on your deep cycle batteries for your 12-volt
needs.
Deep cycle batteries differ in size; the higher
the amp/hour capacity the larger the battery
is. Before purchase, measure your battery
tray to determine which size battery fits. Only
purchase multiple deep cycle batteries of the
same Group (for example, do not mix Group
24 and Group 27 batteries).
Figure 5 Battery
Disconnect