9.3
S
TARTING WITH
L
OW
B
ATTERIES
Each engine has a dedicated
ENGINE BATTERY.
They
may be connected with the
ENGINE
EMERGENCY PARALLEL
(EEP) switch.
It is imperative
that this switch remains normally off
Each
ENGINE
ALTERNATOR
provides
up to 115A
current to charge
its battery.
The
ENGINE BATTERIES
are also connected by
a
voltage sensitive relay
to the
HOUSE BATTERIES
.
When an
ENGINE BATTERY
reaches 13.2V the
VSR
closes and the
ENGINE BATTERY
shares charging
current with both
HOUSE BATTERIES
and the other
ENGINE BATTERY
.
This
VSR also closes whenever the
charger/inverter is charging , thereby keeping the
engine starting batteries full.
Normally when underway, both the
ENGINE
ALTERNATORS
and the
GENERATOR
(if running)
provide charging current to both
ENGINE
BATTERIES
and both
HOUSE BATTERIES. However,
if a battery falls below 12.3V, the
VSR
opens to
separate it from the rest of the bank. That prevents
a low or shorted battery from draining
the other
two batter ybanks
. For instance:
If the
PORT ENGINE BATTERY
drops below
12.
5
V, the port
VSR
opens and disconnects
the port
ENGINE BATTERY
from both
HOUSE
BATTERIES
and the STARBOARD
ENGINE
BATTERY
.
If the
HOUSE BATTERIES
drop below 12.
5
V,
both
VSRs
would open to protect the
ENGINE
BATTERIES
.
Concept diagram of
HOUSE
and ENGINE
BATTERY connections with
VSR
and
EEP
switches
Summary of Contents for 3z
Page 1: ...3z OWNERS GUIDE ...
Page 13: ...2 10 EMERGENCY AND THRU HULL DIAGRAM ...
Page 28: ...5 9 GENERATOR COMPONENT LOCATIONS ...
Page 39: ...Engine maintenance and parameters See the Mercury operation and maintenance manual ...
Page 40: ......
Page 47: ...3Z Owner s Guide 9 11 SYSTEMS LOCATION PLAN ...
Page 49: ...3Z Owner s Guide 9 13 WIRING DIAGRAMS ...
Page 56: ......
Page 57: ......
Page 58: ...3Z Owner s Guide ...
Page 59: ......