Electrical Connections - Norcold DC0788 Manual De Servicio

Electrical Connections

This refrigerator operates on DC electrical sources. Operation out
of these limits may damage the refrigerator's electrical circuit parts
and will void the warranty.
Make no changes to any of the electrical wiring supplied with the
refrigerator. Any changes that you would make to the electrical
wiring will void the warranty.
Connect the 12/24 volts DC supply:
To reduce the risk of electrical interference from other DC
appliances and induction from voltage spikes:
■ The refrigerator must have an independent 12/24 volt DC sup-
ply.
■ Route the DC power supply wires including the fuse directly
from the battery to the refrigerator.
■ Twist the DC power supply wires from the battery to the refrig-
erator.
NOTE: The electronic unit is protected against reverse
battery connection. For protection during installation, a
fuse must be mounted in the + cable as close to the battery
as possible. A 15A fuse for the 12V and a 15A fuse for
the 24V circuits are recommended. If the main switch is
used, it should be rated to a current of min. 20A. The wire
dimensions must be observed. Avoid extra junctions in the
power supply system to prevent voltage drop from affecting
the battery protection setting.
CAUTION: Do not use a converter or a battery charger to supply
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the DC power to the refrigerator. These devices do not supply fi ltered DC
power. When using a converter or a battery charger, make sure a battery
is in-line between them and the refrigerator.
As the distance from the vehicle battery to the refrigerator
increases, the correct AWG wire size also increases. If the wire is
too small for the distance, a voltage drop occurs. The voltage drop
decreases the cooling performance of the refrigerator.
!
WARNING: Use only the recommended wire size.
1. Measure the distance from the vehicle battery to the refrigerator
to determine the minimum wire size to use.
Distance
0 -12 feet
12-20 feet
more than 20 feet
2. To protect the DC power supply wiring, install a 15 Amp fuse or
circuit breaker in the positive (+) DC power supply wire as close
to the battery as possible.
3. Connect the DC power supply wires.
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Minimum Wire Size
#12 AWG min.
#10 AWG min.
#8 AWG min.
NOTE:
If the DC power supply wires are attached
incorrectly, the refrigerator will not operate.
■ Connect the positive (+) DC power supply lead to the red
wire [99] of the refrigerator.
■ Connect the negative (-) DC power supply lead to the black
wire [224] of the refrigerator.
■ Make sure that:
• Each DC power supply lead is attached to the correct polar-
ity wire of the refrigerator power supply.
• The chassis or the vehicle frame is not used as one of the
conductors.
• The DC power supply wires including the fuses are routed
directly from the battery to the refrigerator.
• The wire connections are tight and free of corrosion.
■ If any of these items are not correct, a voltage will occur and
decrease the cooling performance of the refrigerator.
CAUTION: Disconnect the positive (+) DC power supply wire
!
from the battery before you do a "fast charge" of the battery. Failure to
disconnect the positive (+) power supply wire from the battery during
a "fast charge" can cause damage to the refrigerator or to other DC
appliances.
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SERVICE MANUAL