Part number 20078, Rev 0
6
REFRIGERATOR OPERATION
After the unit is properly installed and power is applied, it will take some time before the
system is cooled down to temperature and cycling normally. You should wait 8 hours on the
first startup before beginning to add product to the unit. This ensures that the unit is installed
and operating properly before being put into service. On subsequent startups (after cleanings,
for example), this wait time can be reduced to about 3 hours. After this wait time, the unit
should be cycling in the desired temperature band. The units are calibrated before leaving the
factory, so no adjustment should be necessary.
Loading the units will again cause temperature to rise as the warmer product is introduced into
the compartment. If a large amount of product is to be introduced, it is a good idea to do it in
stages, allowing several hours between stages to allow temperature to stabilize again before
introducing additional warm product. This will minimize the temperature transient while
loading. Other tips for successful loading include:
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Leave about 2-3 inches of free space along the back and sides of the unit to allow for proper
air flow and, therefore, more even cooling of the product.
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When loading the top shelf, avoid blocking the evaporator fan(s) (if installed). There should
be at least 4 inches of clearance below the fan(s) to allow proper air flow.
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Do not overload the unit. Maximum suggested load is about 75% of chamber capacity.
Additionally, the load should be distributed evenly from top to bottom and side to side for
best results.
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Minimize the time the door is open. On top of letting the cold air out, you are also letting
warm, moist air in which can result in more condensation and/or frost in the unit.
Model ABT-30R will go into a defrost cycle every 6 hours to remove frost build-up around the
evaporator coils. This cycle can last up to 25 minutes. During this time the compressor is turned
off and defrost heaters are turned on in the evaporator section. This will cause a rise in air
temperature inside the unit but should not significantly affect product temperatures.
Remember that the units are calibrated to the desired temperature band before leaving the
factory. We also do extensive testing to ensure that these temperatures will result in product
temperatures in the desired band. There should be no need to adjust the temperature control
on these units, but if it is necessary, they can be adjusted using the manual thermostat on the
inside of the unit
.
It is STRONGLY RECOMMENDED that you contact the manufacturer’s Technical Support
Department prior to performing any temperature adjustments to ensure the adjustment is
necessary and, if so, it is performed correctly.
