27
8.6 Ambient Temperature
This is the temperature surrounding the recreational ve-
hicle, as well as the temperature of air at the back of the
refrigerator. As the ambient temperature increases, the
air temperature in the area of the cooling unit increases.
Improper venting at this point will cause the cooling unit
to have reduced efciency. A refrigerator that chases the
out-side temperature is improperly vented or a weak cool-
ing unit.
8.3 Ventilator Fans
Check the gasket on the doors to be sure of a positive
air seal. A simple method to check gaskets is to close
the door on a dollar bill, then pull the dollar bill out. If no
resistance is felt, the gasket in that location is not sealing
properly. This should be done on all sides of the door in
several places. If a gasket is not sealing properly, lift up
the inside of door gasket and insert 1/4” ball of berglass
insulation at all corners on both doors. This is especially
important to the top corners. Next, warm the gasket mate-
rial with a hair dryer. Then close the door and the magnetic
strip should pull the gasket to the metal frame. Leave the
door closed until the material has cooled. Then recheck
for a positive seal. If a positive seal cannot be achieved,
replace the door gasket. Also check that the cooling unit
is installed properly. The cooling unit’s foam block, the
portion that surrounds the evaporator coils, must be ush
to the cabinet at the back of the refrigerator and have a
positive seal. If the cooling unit is not installed properly,
remove and install properly.
The NDA/NDE 1402 models use two ventilator fans
mounted to the back of the refrigerator (exterior). The pur-
pose is to assist required air movement across the refrig-
erator condenser to ensure optimum performance. The
fans are powered from DC current and are controlled from
a limit switch, mounted on the end plate to the condenser
ns just above the ue. The limit switch is normally open
and will close at 149° F +/- 9° F and re-open at 122° F +/-
9° F. The switch can be checked for continuity. If the fans
fail to run. Check all wiring, the inline 3 amp fuse and the
limit switch. If these checks are good, replace the fan(s).
Section 9
FROST
9.1 Door Seals
8.5 Food Storage
Proper refrigeration requires free air circulation within
the food storage compartments. Restricted air circula-
tion within the compartments will cause higher cabinet
temperatures. To remedy this situation, simply rearrange
your foodstuffs. It is also essential that the shelves are not
covered with paper or large storage containers. Always
remember to allow for proper air circulation. Odorous or
highly avored foods should always be stored in covered
dishes, plastic bags or wrapped in foil or waxed paper to
prevent food odors. Vegetables, lettuce, etc., should be
covered to retain their crispness.
NEVER PUT HOT FOOD INTO THE REFRIGERATOR.
To reduce frost formation in and on the freezing compart-
ment, cover stored liquids and moist foods and do not
leave the door open longer than necessary. When the
refrigerator is heavily loaded, it takes a longer time for
refrigerator temperatures to lower, also increasing the ice
making time.
8.4 Leveling
Leveling is one of the requirements for proper operation
of absorption refrigerators. The absorption design utilizes
no mechanical pumps or compressors to circulate the re-
frigerant within the system, so proper leveling must be
maintained to provide the correct refrigerant ow. With-
out proper leveling, refrigerant within the cooling unit will
collect and stagnate at certain areas. Without proper re-
frigerant ow, the cooling process will stop. Absorption
refrigerators have a type of cooling unit that utilizes an en-
closed pump tube surrounded by a solution to protect the
assembly. To ensure proper leveling, the vehicle needs
to be leveled so it is comfortable to live in. (No noticeable
sloping of oor or walls). When the vehicle is moving, lev-
eling is not critical as the rolling and pitching movement
of the vehicle will pass to either side of level, keeping the
refrigerant from accumulating in the piping.
PERFECTLY LEVEL NOT REQUIRED
MORE LEVEL = BETTER OPERATION
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