Electrical Requirements And Components; Dc Voltage Requirements And Polarity; Dc Power Wiring Requirements; Ac/Dc Converter As Power Source - Norcold N611V SERIES Service Manual

ELECTRICAL REQUIREMENTS AND COMPONENTS

DC Voltage Requirements and Polarity

Operating controls require 10.5 to 15.4VDC to operate. The
positive wire lead (+) connects to power board terminal 12VDC;
the negative wire lead (–) connects to terminal GND.
Power Board DC Fuse
!
Never replace a fuse with a higher amp rated fuse.
Always use the specifi ed fuse.
The controls circuit fuse is a standard 5 amp (tan color)
automotive blade type fuse. It is located on the power board,
labeled F1.

DC Power Wiring Requirements

!
Never use undersized wires to supply DC power to
the power board. The use of undersized wires can
cause low voltage and high amp draw conditions. The
high amp draw caused by a circuit using undersized
wires will cause the wire to overheat and creates an
electrical fi re hazard.
18 AWG is the minimum AWG size wire that can be used for
connecting DC power to 2-way models. The in-line fuse for
overload protection must not exceed 6 amps.
The distance between the RV DC power source and the
power board DC power connection terminals dictates the
AWG size wire that must be used. If the distance from the DC
power source is:
• 20 feet or less – 10 AWG or a larger gauge wire must
be used. The size fuse for circuit overload protection
must not exceed 30 amps.
• Over 20 feet – AWG 8 or a larger wire gauge must be
used. The size fuse for circuit overload protection must
not exceed 40 amps.

AC/DC Converter as Power Source

The power board must be supplied with 12VDC only from the
fi ltered output (battery side) of a converter.
Unfi ltered voltage (commonly referred to as AC ripple) output
of AC/DC converters can cause the electronic controls to set
false fault codes. It can also turn off the refrigerator or prevent
the refrigerator from turning off.
24
N611v, N811v Models
WARNING:
WARNING:
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AC Power Cord
The AC power cord shown in Fig. 18 is used on units without
ice maker. On all AC power cords the round side of the plug
that connects to the power board faces the left side of the
power board. The cord's grounding prong on the AC outlet
connector must be left intact and never be modifi ed or cut. The
cord's ground wire (green wire) must always be fastened to the
refrigerator cabinet metal plate.

12VDC Ventilation Fan

The 12VDC ventilation fan, shown in Fig. 19, enhances
ventilation in sidewall venting installations (unit installed in
RV slide out enclosures). The letter "F" in a model number is
used to identify refrigerators with a factory installed 12VDC
ventilation fan. All sidewall vented units must be equipped
with a ventilation fan to prevent combustion gases and hot
ventilation air from stagnating in the enclosure.
Ventilation fans are supplied 12VDC through power board
connections. Fan operation is automatically controlled by
a thermostatic switch mounted on the condenser fi n. The
thermostat will be on the fi rst fi n from the left (as seen
looking from the back). See Fig. 20 and 21. The switch turns
the fan on when the temperature on the fi rst condenser fi n is
approximately 130 °F. The switch turns the fan off when fi n
temperature falls to approximately 115 °F.
®
NORCOLD fan kit is wired to the power board 12VDC
connections using "Y" type wire connector. The fan circuit is
protected by an in-line fuse (included in the kit). The fuse, part
of the fan kit wiring is a fast acting 1 amp,
See Fig. 21. The wiring pictorial for fi eld installed fan is shown
in Fig. 22.
Refrigerator Service Manual
1 1
/ " x 1 / " AGC type.
4 4