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-5-
IV. a - REFRIGERATORS:
Both refrigerators and freezers do not require manual
defrosting. During normal operation, a refrigerator con-
tinuosly circulates above freezing cabinet air through
the coil. A compressor “OFF” cycle occurs
every hour
to melt any frost which may accumulate on the coil during the
compressor “ON” cycle. The control will read “dEF” when this
occurs and the evaporator fans will continue to operate. With
standard holding refrigerators, high relative humidity is also
maintained to prevent dehydration of stored product.
IV. b - FREEZERS:
During normal operation, a freezer continuously circulates
below freezing cabinet air through the coil. The coil requires a
periodic defrosting for proper operation. This is accomplished
by an automatic, time activated, temperature/time terminated,
defrost program. The controller is preset at the factory for six
equally spaced defrost cycles within each 24-hour period.
At the start of a freezer defrost cycle, both the compressor
and evaporator fans are OFF. The INTELA-TRAUL
®
control
will read “dEF” (see gure 7). The electric heater (attached
to the coil) is energized. When a temperature device afxed
to the coil senses 70°F (models with electric defrost), the coil
is fully defrosted and the compressor operation is resumed,
defrost heaters are automatically turned off. The coil fans are
delayed from starting at the termination of a defrost cycle. Fan
operation is automatically resumed, or they can also be started
by a time or temp delay (whichever comes rst). In case of
temp delay, it uses the same coil sensor and starts at 32°F.
The total refrigeration system operation is then resumed.
During freezer defrost operation, heat is confined to the
coil enclosure to prevent any signicant rise in temperature
within the food zone. The fan delay controls function upon
termination of a defrost cycle is two-fold. First, to prevent
blowing warm air into the food storage area. Second, to
prevent any condensation on the defrost coil from being blown
into the food storage area.
The INTELA-TRAUL
®
control is set from the factory to
terminate defrost at 20 minutes in the event of a sensor
failure. This setting should never be tampered with, without
rst consulting the factory.
IV. c- HOT FOOD CABINETS:
Hot food cabinet operation is governed by the
INTELA-TRAUL control, which controls the ON/OFF
operation of the strip heaters. The control can bet set to
maintain any operational temperature between 140 - 180°
F (in 5°F increments).
Hot food cabinets are delivered from the factory with
the control set to the “OFF” position. Follow the
instructions in section “VII. t” to get started.
NOTE: A vent is included at the top of all hot food
cabinets. The vent opening is factory set and secured
for best position. Be certain to make sure this vent is
kept free of any obstruction.
V. CARE & MAINTENANCE
WARNING
DISCONNECT ELECTRICAL POWER SUPPLY
BEFORE CLEANING ANY PARTS OF THE UNIT
V. a - CLEANING THE CONDENSER:
The most important thing you can do to insure a long,
reliable service life for your Traulsen is to regularly clean
the condenser coil.
The condensing unit requires regularly scheduled
cleaning to keep the nned condenser clean of lint
and dust accummulation. The INTELA-TRAUL control
will notify you through a “CLN-FIL” message when
cleaning is necessary (see page 8). Keeping the
condenser clean allows the cabinet to operate more
efciently and use less energy.
To clean the condenser, rst disconnect electrical power
to the cabinet and lift up the front louver assembly. To
lift this, remove the two screws located on both sides at
the bottom of the louver assembly (see gure 8).
IV. OPERATION
Fig. 7
FREEZER
SET
)
)
)
INTELA-TRAUL
°F °C
FREEZER
FREEZER
SET
)
)
)
INTELA-TRAUL
°F °C
REFRIGERATOR
Fig. 9
Lift-Up Louver
Assembly
Fig. 8
Remove
Screws
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