Norcold DE-560, Руководство пользователя

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OPERATION
Power Source
As previously noted, the Norcold refrigerator can be operated
on either 12 volts DC or 120 volts AC. If both power sources are
connected simultaneously, the refrigerator will operate on 120
volts AC. A special relay disconnects the DC power. To operate
on DC power, the AC source must be disconnected, allowing the
relay to switch to 12 volts DC.
On DC operation the circuit is protected electronically for over-
current and overvoltage. Likewise on AC operation the circuit is
protected from overload conditions by a bi-metallic current limit-
ing device.
Temperature Control
A single thermostat controls the operation of the refrigerator on
AC or DC. It is located on the panel below the front door (See
Figure 1). The dial is marked "1" through "5". The nearer the dial
is set to "5", the colder the temperature becomes in the cabinet.
There is no need to readjust the setting of the thermostat for
dual operation. Once the desired temperature is reached, the
thermostat will control the cabinet temperature equally well on
either voltage supply.
Initial Start-up
Before operating the refrigerator for the first time, check to see
that the AC and DC supply connections are correct. If normal, the
green power indicator will be illuminated. Connect the vehicle to
the external power supply of 120 volts. Turn the switch located
next to the thermostat to the "ON" position. Turn the thermostat
dial to the number "3" setting. The unit should be operating. You
can hear the compressor sound by placing your ear next to the
refrigerator.
Allow approximately five minutes of operation and open the
freezer compartment door. Place your hand at the upper left rear
corner of the cooling plate. This is the area of the plate that will
begin cooling first. If you notice a cooling effect at this point, then
the unit is functioning properly.
Close the refrigerator door and allow the refrigerator to operate
on AC until it cycles or shuts itself off. This indicates the thermo-
stat is operating and that the refrigerator is cooling on AC opera-
tion.
Now, disconnect the AC supply and open the refrigerator door
so that the cabinet interior will warm up and allow the thermostat
to demand cooling.
As soon as the unit’s compressor begins to operate, close the
refrigerator door, allowing the unit to run. It should shut off or
cycle within 10 to 20 minutes indicating the DC operation is cor-
rect.
SUGGESTIONS FOR OPERATION
The following are suggestions for efficient operation of the re-
frigerator:
1. The thermostat dial is numbered from 1 through 5, with the
number 5 setting the maximum coldest position. In order to
conserve battery power, it is advisable to set the thermostat
dial at the lowest setting that will provide adequate refrig-
eration. This practice will reduce the running time of the
refrigerator and draw less current from the battery. A setting
of 3 is a normal position.
2. Always operate the refrigerator on 120 volts AC when avail-
able, especially during initial start-up or pull-down cycle of
the refrigerator. Depending upon the ambient temperature,
the initial start-up may require 1-2 hours of continuous op-
eration before refrigerator temperatures are attained and
unit cycling begins.
3. Never employ "quick-chargers" to the battery unless the
On-Off switch is set to the "OFF" position or the 12-volt DC
leads to the refrigerator are disconnected. Possible inverter
damage will occur if the high voltage of "quick chargers" is
permitted to energize the DC circuits of the inverter.
4. The use of a commercial 12-volt DC to 120-volt DC solid
state inverter, converter, gasoline or belt-driven generator
with 120 volt AC output is not recommended for operating
the refrigerator unless the manufacturer of the foremen-
tioned devices guarantees the output voltage to be 120
volts AC plus or minus 10 percent and the frequency to be
60 hertz plus or minus one hertz. Devices that cannot meet
the specified tolerances do not hold the required frequency,
provide poor performance of the refrigerator, and damage
the resonance springs in the compressor.
5. When connecting the refrigerator to the DC supply, observe
the correct polarity. If the polarity is reversed (positive con-
nected to negative terminal), the circuit protection will shut
the unit down. The wire leads must be disconnected and
reconnected properly, and circuit breaker reset.
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