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11
OPERATIONS MANUAL
REFRIGERATED BASES & PIZZA PREP TABLES
DEFROST SYSTEM
(Pizza Prep and Freezer Base Models)
All Pizza Prep Tables feature a positive “off-cycle” defrost
system, with a timer that automatically initiates and terminates
compressor off-cycles, to ensure the evaporator remains frost-
free, even under heavy usage. All freezer defrost systems feature
a timer that initiates defrost cycles with a fail-safe cut-off time of
20 minutes, an automatic limit switch that provides temperature
termination of the defrost cycles, and electric heaters for posi-
tive thawing of the evaporator coil and drain pan, for optimum
performance.
The defrost timer on all pizza prep and freezer base models is
located in the machine compartment, behind the front grill on
CPA & CFA models (see Figure 11). If desired, the start time
for a defrost cycle can be adjusted by turning the knob on the
defrost timer clockwise until defrost cycle begins (compressor
and all fans will terminate). Defrost will begin at this same time
every day at 8-hour intervals. For example, if an 8:00 am defrost
is desired, at 8:00 am turn the timer knob to initiate defrost. A
defrost cycle will start every day at 8:00 am, 4:00 p.m., 12:00
am. If there is a loss of power to the cabinet, the defrost timer
will have to be reset to maintain the same defrost cycle times.
FIGURE 11: CPA/CRA Components (Front View)
EVAPORATOR
COVER
FAN MOTORS
(BEHIND PANEL)
THERMOMETER
TEMPERATURE
CONTROL
EVAPORATOR
DRAIN PAN
DEFROST TIMER
GRILL
(REMOVED)
CONDENSER
(BEHIND GRILL)
IMPORTANT NOTE: Do not attempt to bulk chill or freeze
product in your storage cabinet and do not leave pans
with food in your Sandwich top or Pizza Prep rail over-
night.
All models have an extra large, full length, performance-rated,
plasticized fin coil for extended life, with uniquely directed air
flow distribution that keeps product at uniformly constant tem-
peratures. The evaporator coil and temperature control are easily
accessible from inside the cabinet (see Figure 11).
All self-contained refrigerators and Pizza Prep Tables are
designed and factory set to maintain an average cabinet temper-
ature of 38° to 40°F (3.3° to 4.4°C). All self-contained freezers
are factory set to maintain an average cabinet temperature of -4°
to 0°F (-20° to -18°C). If an adjustment is necessary to maintain
cabinet temperature within these ranges, locate the temperature
control (see Figure 11) and place a screwdriver into the slotted
knob on the temperature control. Turn clockwise no more than
1/4 turn for a colder cabinet temperature or counterclockwise for
a warmer cabinet temperature. Allow the cabinet to stabilize for
at least 30 minutes and recheck the temperature. Further adjust-
ments out of the factory design temperature range should only
be made by a qualified refrigeration mechanic.
IMPORTANT NOTE: Turning a thermostat fully counter-
clockwise turns the refrigeration compressor “off.”
IMPORTANT NOTE: All refrigerators and Pizza Prep
Tables are designed with an automatic, “off-cycle”
defrost system which means that defrosting occurs auto-
matically when the compressor is not operating during an
off-cycle. Do not set the thermostat too cold where the
cabinet temperature will fall below 35°F (1.7°C) because
the evaporator will become blocked by ice since the com-
pressor off-cycle will be considerably shortened. This
will result in loss of product stored within the cabinet and
require service to defrost the evaporator and re-adjust
the thermostat.
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