Norcold DE-540, Owner'S Manual, Page: 6 / 12

DOOR RE-INSTALLATION
3. Install the 8 plastic hole covers into the mounting flange
where the hinge brackets and travel latch were previously
mounted. Turn the door upside-down so that the hinge
brackets of the door are to the opposite side of the cabinet.
Re-install both hinge brackets to the mounting flange in re-
verse manner. Re-install travel latch to mounting flange.
NOTE: Do not completely tighten screw at this time.
DOOR AND TRAVEL LATCH ALIGNMENT
4. With the door closed, align the door so that there is a uni-
form space between the door and mounting flange - sides,
top, and bottom. Adjust the door, if necessary, to the cabi-
net so that the gasket seals - yet does not bind. The door
seal can be checked by closing the door onto a 1" x 6" strip
of paper. A slight drag should be noticed when the paper is
pulled out between the gasket and the cabinet. Repeat the
process at all four sides of the door. If the door does not
seal properly, re-adjust the hinge bracket. When the seal
and the alignment are properly achieved, tighten all screws
holding the hinge brackets in place.
Position the travel latch such that it secures the door when closed,
but does not prevent the door from closing properly. Tighten the
two screws securing the travel latch to the mounting flange.
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 thermostat is
operating and that the refrigerator is cooling on AC operation.
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 correct.
MAINTENANCE OF YOUR REFRIGERATOR
Cleaning Cabinet and Door
Wipe with a soft, dry cloth. To remove dirt, use a cloth mois-
tened by a warm neutral detergent solution. Never use hot water.
After cleaning, wipe with a dry cloth.
CAUTION:
Never use a brush, powder soap, cleanser, acid, benzene,
gasoline, or thinner. These tend to leave scratches on the
coating.
Gasket (door cushion)
Wipe away dirt with a soft cloth moistened by a neutral deter-
gent. Do not soak the cloth excessively. If water gets inside, the
insulating effect may become temporarily impaired.
Attachments
Wash all attachments in soap suds. Rinse and wipe clean with a
dry cloth.
To Turn Off The Refrigerator
If you will not be using the refrigerator for a day or two, turn the
thermostat knob to "1". For a longer period, set the On-Off switch
to "OFF" and disconnect power by removing the AC plug from it’s
socket. Also, disconnect the DC power from it’s source.
When not in use, the refrigerator should be emptied, cleaned,
and dried, and the door left ajar.
Drip Tray
The drip tray is located beneath the evaporator plate (See Fig-
ure 9). The tray can be emptied by either pulling it forward and
removing it, or by removing the drain plug while holding a pan
below.
For installations where the refrigerator door cannot be opened
beyond 90 degrees, the drain plug must be utilized to empty the
tray prior to removal for cleaning.
To remove the tray, pull forward until the tray drops down. Tilt
the front of the tray down to allow tray to be removed. Re-install
in reverse order.
Figure 9
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