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-5-
IV. a - REFRIGERATORS:
Both refrigerators and freezers do not require manual
defrosting. During normal operation, a refrigerator
continuosly 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 figure 7). The electric heater (attached to the
coil) is energized. When a temperature device affixed 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 first). 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 significant 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
first 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 finned 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
efficiently and use less energy.
To clean the condenser, first 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 figure 8).
Fig. 8
Remove
Screws
IV. OPERATION
Fig. 7
FREEZER
SET
)
)
)
INTELA-TRAUL
°F °C
FREEZER
FREEZER
SET
)
)
)
INTELA-TRAUL
°F °C
REFRIGERATOR
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