Westerbeke WPDS-20 Technical Manual page 110

WESTERBEKE
MARINE ENGINE PRODUCTS
SERVICE BULLETIN #87
ISSUED: September 18, 1975
Alternator Output Splitter
All Marine Engines
SUB,lECT:
MODEL:
DISTR:
Distributors, Shipments
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. Changing rates are in proportion to the batteries' voltage (state
of discharge). This method precludes the necessity, and even the desir-
ability, of a rotary switch for selecting which battery is to be charged.
It also assures that ships' services cannot drain the engine starting
battery.
INSTALLATION:
1.
2.
3.
4.
5.
Mount solitter 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.
Be sure to use a wire size aopropriate to the output of the associ-
ated alternator. In full power systems number 4 wire is recommended
from the alternator to the splitter and from the splitter to the
batteries.
Connect the alternator output terminal to the center splitter terminal.
Connect one splitter side terminal to one battery(s}.
Connect the other splitter side terminal to the other battery{s).
TEST INFORMATION: When the engine is not running, the side splitter ter-
minals should read the vo1taqe of the respective battery. The center
splitter terminal should read zero voltage.
With the engine runnino and alternator charging, the side splitter
terminals should read the same voltage which should be the voltage of the
regulator or somewhat less. The center splitter terminal should read .82
volts hioher than the readinos of the side terminals.
This unit is sealed for maximum life and is not repairable.
Continued-Reverse Side
J f-4
WESTERBEKE CORP· AVON INDUSTRIAL PARK· AVON. MASS 02322 USA· TELEPHONE 617 588·7700 TELEX 92-4444· CABLE WESTCORP
PN 20701 9/75 Page 1/1
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