Information About Electrical Connections - Norcold 442 Repair Manual

B101
Electrical Connection
120 Volts AC-400 Series
The refrigerator is equipped with
a three prong plug for protection
against shock hazard and must be
connected into a recognized three
prong attachment receptacle. The
free length of cord is 24", so it is
recommended that the receptacle
be located to the left side of the re-
frigerator (viewed from rear) and
approximately 12" from the floor.
This allows easy accessibility
through the vent door. The cord
must be routed so as not to come
in contact with the burner cover, flue
pipe or any other component that
could damage the cord insulation.
WARNING
DO NOT REMOVE (CUT) GROUND-
ING PRONG FROM THE REFRIG-
ERATOR AC POWER CORD. RE-
MOVAL OF THIS PRONG CAN RE-
SULT IN A SEVERE ELECTRICAL
SHOCK, AS WELL AS VOIDING THE
REFRIGERATOR ELECTRICAL CER-
TIFICATION AND WARRANTY.
12 Volts DC Connection -
400 Series
The 12 volt DC supply is neces-
sary for the flame ignition circuit in
the gas mode, the interior light, hu-
midity heater, and to supply power
for 3-Way models in the DC mode.
The AC mode (2-Way or 3-Way
models) operates independently of
the 12 volt DC. The DC supply
connections are made at the termi-
nal block provided at the rear of
the refrigerator. The terminal block
accepts wire connections with 1/4"
Quick Connect terminals. Correct
polarity must be observed when
connecting to the DC supply. The
distance the current must travel
from the battery to the refrigerator
Information About Electrical Connection
dictates the AWG wire size to be used. Should the wire be too small for the
distance, a voltage drop will result. In case of 3-Way models, the voltage
drop affects the wattage output of the cartridge heater and resultant refrig-
erator performance.
OPERATION
Models 442-443-452-453-462-463-482-483
All use a single combination control to determine and regulate the mode of
operation (LP GAS or Electric). The control is operated by two knobs, the
first to select the mode of operation (LP GAS or Electric); the second, to
control the thermostat setting. The control consists of a gas shut off valve,
safety valve, thermostat and electric interlock. The interlock prevents the
possibility of running on LP GAS and Electric at the same time. The safety
valve is built into the combination control, and is designed so that any loss of
flame will stop the gas flow to the burner. It is controlled by means of a thermo-
couple positioned in the gas flame. As long as a flame is detected by the ther-
mocouple, the valve will remain open. In the event of flame failure, the valve
closes, shutting off the gas flow. To light or relight the burner, the gas control
knob must be depressed or held in until the relighter establishes a flame. The
relighter is made active by means of an illuminated rocker switch. When the re-
lighter switch is in the on position it will illuminate, signaling that 12VDC is pre-
sent and energizing the relighter to send a spark to the burner. It will continue
to spark until either a flame has been established or the switch is turned off.
On the 3-Way models (A/C, D/C and LP Operation), there is an A/C-D/C se-
lector switch. To operate the refrigerator on 120VAC, set the mode selector
to ELEC and depress the A/C switch. If 120VAC is available, the refrigerator
will function on A/C current. To operate the refrigerator on D/C Electric while
traveling, leave the mode selector switch in ELEC position, and depress the
D/C switch for DC operation.
Electrical Connection - 12 Volt DC
12 volt DC must be connected (see Figure 3.1 below) at all times in order
to operate the electronic ignition system, and the interior light and high hu-
midity circuit.
The 12 volt DC power source can be either a 12 volt "deep cycle battery" or
the vehicle's convertor. Voltage Limits:
12 volts DC control voltage
15.4 volts DC maximum
10.5 volts DC minimum
Convertor
To Refrigerator
Figure 3.1
Appliance
Connection
Recommended 12 Volt Connection
3-3
12 volt
RV battery