IV. b - FREEZER NORMAL OPERATION (continued):
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 microprocessor control
will read “dEF” (see figure 3). 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 re-
sumed, 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 op-
eration 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 Microprocessor control is set from the factory to termi-
nate 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 - USING THE CONVERTIBLE FREEZER:
The default setting as delivered from the factory is for
operation in normal freezer mode (0 to -5°F). How-
ever, operation can be changed to refrigerated tem-
peratures (36-38°F) by inserting the key into the face
mounted “CONVERSION KEY SWITCH ” and turning
this 90 degrees clockwise. Turn the key back 90 de-
grees counter-clockwise (to the 12 O’Clock position)
to resume normal freezer operation.
III. e -
CORD & PLUG:
Most self-contained models are supplied with a cord
& plug attached. It is shipped coiled at the top of the
cabinet, secured by a nylon strip. For your safety and
protection, all units supplied with a cord and plug in-
clude a special three-prong grounding plug on the
service cord. Select only a dedicated electrical outlet
with grounding plug for power source. NOTE: Do not
under any circumstances, cut or remove the round
grounding prong from the plug, or use an extension
cord.
III. f -
POWER SUPPLY:
The supply voltage should be checked prior to con-
nection to be certain that proper voltage for the cabi-
net wiring is available (refer to the serial tag to deter-
mine correct unit voltage). Make connections in ac-
cordance with local electrical codes. Use qualified
electricians.
Use of a separate, dedicated circuit is required. Size
wiring to handle indicated load and provide necessary
overcurrent protector in circuit (see amperage require-
ments on the unit’s serial tag).
III. g - WIRING DIAGRAM:
Refer to the wiring diagram for any service work per-
formed on the unit. Should you require one, please
contact Traulsen Service at (800) 825-8220, and pro-
vide the model and serial number of the unit involved.
III. h - CLEARANCE:
In order to assure optimum performance, the condens-
ing 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. Clear-
ance of at least 12” above is required in order to per-
form certain maintenance tasks.
IV. OPERATION
IV. a - CONVERTIBLE CABINET - INTENDED USE:
A convertible cabinet is a reach-in freezer which, with
the use of a key switch, can change itself to operate at
refrigerated temperatures. This two temperature abil-
ity allows the operator to maximize either their refrig-
erated or frozen storage space as needed, providing
them with additional flexibility in order to manage
changing menus and product types.
IV. b - FREEZER NORMAL OPERATION:
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 accom-
plished by an automatic, time activated, temperature/time
terminated, defrost program. The controller is preset at the
-3-
III. INSTALLATION (continued)
Fig. 3
IV. OPERATION
°F °C
FREEZER
SET
