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-5-
III. j - POWER SUPPLY
The supply voltage should be checked prior to connection
to be certain that proper voltage for the cabinet wiring
is available (refer to the serial tag to determine correct
unit voltage). Make connections in accordance with local
electrical codes. Use qualied electricians.
Use of a separate, dedicated circuit is required. Size wiring
to handle indicated load and provide necessary overcurrent
protector in circuit (see amperage requirements on the unit’s
serial tag).
III. k - WIRING DIAGRAM
Refer to the wiring diagram for any service work performed
on the unit. Should you require one, please contact Traulsen
Service at (800) 825-8220, and provide the model and serial
number of the unit involved.
III. i - CLEARANCE
In order to assure optimum performance, the condensing
unit of your Traulsen unit MUST have an adequate supply
of air for cooling purposes. Therefore, the operating location
must either have a minimum of 12” clearance overhead of
the condensing unit or allow for unrestricted air flow at the
back of the unit. Clearance of at least 12” above is required
in order to perform certain maintenance tasks.
IV. OPERATION
IV. a - REFRIGERATORS
Neither refrigerators nor freezers require manual defrosting.
During normal operation, a refrigerator continuously
circulates cool air (35°F to 38°F) across the evaporator coil.
A defrost cycle occurs every 8 hours to melt any frost which
may have accumulated on the coil. The control will display
the cabinet temperature when the defrost started and activate
a LED with the defrost symbol on the control display.
IV. b - FREEZERS
During normal operation, a freezer continuously circulates
below freezing cabinet air across the evaporator 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.
I
V. b - FREEZERS (cont’d)
The control will display the cabinet temperature when the
defrost started and activate a LED with the defrost symbol
on the display (see gure 7). The electric heater (attached to
the coil) is energized. When a temperature sensor afxed to
the coil senses 45°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.
Fig. 7
Control Displaying Cabinet Defrost
During freezer defrost operation, heat is conned 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 Smart Control is
set from the factory to terminate defrost at 30 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 Smart
Control, which controls the ON/OFF operation of the strip
heaters. The control can bet set to maintain any operational
temperature between 130 - 180° F (in 1°F increments)
Hot food cabinets are delivered from the factory with the
control set to the “OFF” position. Follow the instructions in
section “VI. f” 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.
III. INSTALLATION (continued) IV. OPERATION (continued)
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