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SERVICE BULLETIN
DATE:
September 18, 1975
BULLETIN NUMBER: 87
MODEL:
All Marine Engines
SUBJECT:
Alternator Output Splitter
GENERAL DESCRIPTION:
The splitter is a solid state device which allows
two batteries to be recharged and brought to the same ultimate voltage
from a single alternator as large as 120 amp and, at the
same time, iso
lates each battery so that discharging one will have no effect on the
other.
Charging rates are in proportion to the batteries voltage (state
of discharge).
This method precludes the necessity, and
even
the desira
bility
of
a rotary switch for selecting which battery is to be charged.
It also assures that ships services cannot drain the engine starting
battery.
I NSTALLAT ION:
1.
Mount splitter on a metal surface other than the engine, preferably
in
an air stream if available.
Do not install near engine exhaust
system.
Install with cooling fins aligned vertically.
2.
Be sure to use a wire size appropriate to the output of the associated
alternator.
In full power systems number 4 wire is recommended from
the alternator to the splitter and from the splitter to the batteries.
3.
Connect the alternator output terminal to the center splitter terminal.
4.
Connect one splitter side terminal to one battery
Cs).
5.
Connect the other splitter side terminal to the other battery(s).
6.
When the splitter is installed, both batteries will see a charging
voltage 8/10 volts less than usual.
This voltage drop can be regained,
if desired, by connecting the regulator wire directly to the alternator
output terminal instead of the regulator terminal.
TEST INFORMATION: When the engine is not running, the side splitter ter
minals should read the voltage of the respective battery.
The center
splitter should read zero voltage.
With the engine running and alternator charging, the side splitter ter
minals should read the same voltage which should be the voltage of the
regulator or somewhat less.
The center splitter terminal should read .82
volts higher than the readings of the side terminals.
Continued...
f
W
J
J H WES TERBEKE CORP
AVON INDUSTRIAL PARK,
AVON, MAS8. 02322
(517i
508-7700
CASLE: WESTCORP AVON•TELEx: p2-4444
P/N:
20745
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