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6.1.2 Wiring diagram of dual battery hookup
Battery protection
The wiring diagram shown below is recommended for dual battery
hookup. (See Fig. 4)
This refrigerator is equipped
with a battery monitor cutting
the compressor in or out in
order to protect the battery.
CAUTION
To avoid damage to the refrigerator in the event of reverse
polarity or short circuit, install a 10A fuse (12V DC) or a 10A
fuse (24V DC) in the wiring circuit nearer to the battery.
1) Twisting lead wire
To further reduce the radio interference during DC operation,
twist the negative and positive cables (use separate cables)
together into a spiral form, between the battery.
2) Connecting refrigerator directly to battery
Any switches and lead wires for other electrical equipment
should not be shared with the wiring between the refrigerator
and the battery. Other equipment can generate high voltage
pulses which may cause transistor damage to the refrigerator
power supply. (See Fig. 2)
Cut out Voltage 12V
9.6V
Cut in Voltage 12V
11.5V
Cut out Voltage 24V
20.4V
Cut in Voltage 24V
23.1V
(Fig.4)
Original wiring. Remove
and connect to power
isolator (terminal).
Field
Alt.
or
Gen.
Power converter
or battery charger
Vehicle AC suppl
shoreline cord
Vehicle circuit
breaker or
M/G set
Shoreline outlet
Refrigerator
AC voltage
Common with AC ground
RV battery 12/24 V
90 A/H or more
Recommendation
FOR POSSIBLE REDUCING
RADIO INTERFERENCE BY
LEAD / WIRE CONNECTION
TO THE OTHER GROUNDING
POINT, OR PLEASE CONTACT
YOUR ENGEL DEALER
To Refrigerator
Ignition system
Battery isolator
Battery charge circuit
APP circuit
New #8 wire-red
Vehicle engine
12V battery
Suggested alternative:
2 golf cart batteries
6V in series
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