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P a g e
March
31,
2019
Before your new unit is connected to a power supply, check the incoming voltage
with a voltmeter. If anything, less than 100% of the rated voltage for operation is
noted, correct it immediately.
RECOMMENDATION:
Before loading product into your NELSON freezer we recommend you run your
unit empty for two days. This is a pre-startup check to ensure the unit is working
properly. Remember, our factory warranty does not cover product loss!
HOW IT WORKS:
Eutectic is a fancy word that refers to a substance that has the same consistent
chemistry as the material goes through the transition of water to ice to water repeatedly.
The eutectic solutions in our cold packs are basically salt water with some other traces
of alcohols and some “magic dust”. These solutions, while not pleasant to drink, are
non-toxic. True eutectics (as opposed to glycols or organic materials like the “blue ice”
stuff you can buy for keeping your lunch chilled) are the most efficient method to store
“cold” energy. You get the most stored energy per pound of material.
When water freezes, it stores tremendous energy. As it melts, it releases that stored
energy very efficiently. For instance, the amount of energy to make a pound of water
drop from 34 degrees to 33 degrees is 1 unit of energy (BTU if you want the technical
stuff). The energy required, however, to go from 33 degree water to 32 degree ice is
144 units of energy. We call the transition from liquid to ice and ice to liquid a phase
change in the material. The energy to keep products cold for extended periods relies on
the energy stored during the phase change of the solution. The requirement to have the
solution go through the phase change leads to a very important point. Cold plates will
only work for any length of time when they are completely frozen. Putting product in a
cold plate cart will do very little holding if the cold plates are not frozen solid.
OPERATION &
CARE OF THE CABINET
:
Caution
- This unit contains R290, a flammable hydro-carbon refrigerant. If the unit is
not functioning properly, remove it from service, and call an HVAC technician certified to
handle flammable refrigerants.
Do not operate the freezer unless the louver grills are properly secured in place
.
Simply plug the cart into an outlet following the guidelines above. The compressor will
run for approximately 24 hours, or until the cart shuts off on its own when it reaches the
thermometer set point. It is then frozen, essentially storing energy in the walls, for a 10
hour day of use. After any length of use, simply plug back in for a 12 hour recharge.
