NuAire NU-99100J Manual

OM0306
Series A
Revision 1
December 2020
NU-99100JGA: (115 VAC Only)
NU-99100JE: (230 VAC Only)
NuAire, Inc.
2100 Fernbrook Lane
Plymouth, MN 55447
Toll-Free: 1-800-328-3352
Minnesota: [phone]
Fax: [phone]
BLIZZARD ULTRA LOW TEMPERATURE
UNDER COUNTER FREEZER
NU-99100JGA /NU-99100JE
OPERATION &MAINTENANCE MANUAL

OM0306 PAGE 2OF 24 REV 1DECEMBER/2020
Table of Contents
1.0 Packing List.................................................................................................................................. 3
2.0 Precautions for Safe Operation..................................................................................................... 3
2.1 Safety Labels and Precautions............................................................................................................3
2.2 Precautions for Safe Operation..........................................................................................................3
3.0 Product Features.......................................................................................................................... 6
4.0 Usage Precautions ....................................................................................................................... 7
5.0 Product Installation...................................................................................................................... 8
5.1 Installation Environment....................................................................................................................8
5.2 Installation Site ..................................................................................................................................8
5.3 Preparation Before Use......................................................................................................................9
5.4 Initial Startup ...................................................................................................................................10
5.5 Operation after a Power Outage......................................................................................................11
6.0 Refrigerator Components............................................................................................................12
6.1 Control Panel ...................................................................................................................................12
7.0 Operation ...................................................................................................................................13
7.1 Unlocking the Freezer ......................................................................................................................13
7.2 Temperature Setting (TS) .................................................................................................................13
7.3 High Alarm Setting (ALH)..................................................................................................................13
7.4 Low Alarm Setting (ALL) ...................................................................................................................13
7.5 User Parameter Adjustment ............................................................................................................13
7.6 USB Data Export...............................................................................................................................14
7.7 General Setting Notes ......................................................................................................................14
8.0 Display and Alarms .....................................................................................................................15
8.1 Alarm Table......................................................................................................................................16
8.2 Automatic Alarm Recovery Time Setting .........................................................................................17
8.3 Remote Alarm Terminal ...................................................................................................................17
9.0 Cleaning and Maintenance..........................................................................................................17
9.1 Cleaning the Components................................................................................................................17
9.2 Cleaning the Freezer ........................................................................................................................17
9.3 Cleaning the Condenser Filter..........................................................................................................18
9.4 Defrosting the Interior Wall .............................................................................................................18
9.5 Battery Maintenance .......................................................................................................................18
9.6 Freezer Disposal...............................................................................................................................18
10.0 Battery Removal .........................................................................................................................19
10.1 Battery Location...............................................................................................................................19
10.2 Removing the Battery ......................................................................................................................19
11.0 Optional Components .................................................................................................................20
11.1 Storage Shelf and Case.....................................................................................................................20
12.0 Troubleshooting..........................................................................................................................21
13.0 Refrigeration Principle and Circuit Diagram .................................................................................22
13.1 Refrigeration Schematic Diagram ....................................................................................................22
13.2 Circuit Diagram ................................................................................................................................23
14.0 Technical Specifications ..............................................................................................................24
14.1 Specifications ...................................................................................................................................24
14.2 Technical Data..................................................................................................................................24

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1.0 Packing List
Item
Quantity
Installation and Commissioning Manual
1
User manual/Position Installation Methods
1/1
Plastic bag
1
Ice scraper
1
Key
4
Position limiter
2
2.0 Precautions for Safe Operation
Thank you for choosing a Nuaire Laboratory Ultra Low Temperature (ULT) Freezer. Please read this manual for
safe operation of this product.
2.1 Safety Labels and Precautions
Complied with the requirements of MDD 93/42/EEC annex V
2.2 Precautions for Safe Operation
When CO2/LN2 backup is activated, the location place must be well ventilated. Increased CO2 in the air may be
harmful and even fatal. If the ventilation is poor, other methods should be considered to ensure safe working
environments.
If there is a leakage of petroleum gas or other flammable gas, close the gas supply valve and open doors and
windows to ventilate the air. Do not plug or unplug your freezer unit to avoid potential explosion or fire.
Warning
Electric
Shock
Combustible
Materials
Low
Temperature
Slippery
Surface
Electrical
Ground
Watch Your
Fingers and
Hands

OM0306 PAGE 4OF 24 REV 1DECEMBER/2020
Only professional technicians or service personnel can install the unit. Failure to do so may cause electric shock or
result in a fire hazard.
The freezer must be securely installed on a firm surface. Uneven mounting may result in the product tipping over
causing injury and/or damage.
Only use the dedicated power supply marked on the product label to avoid fire and electric shock.
If the voltage being used is 10% higher than the rated voltage, a regulator with a capacity of 4000 W or higher
must be installed.
If the power cord needs to be extended, the cross-section of the extended cable must be no less than:
o12 wire gauge and no longer than 10 ft [3 m] for products of 115V~/60Hz to avoid fire or electric shock.
o14 wire gauge and no longer than 9 ft [2.75 m] for products of 220V~240V/50Hz to avoid fire or electric
shock.
Your ULT unit is equipped with a standard three-prong power plug (grounded) complying with the standard three-
prong socket (grounded) rated 10 A. Removal of the ground prong
is prohibited. It must be securely plugged
into the socket, as a loose plug in the socket may cause fire.
Never install your ULT in an unprotected area. If the unit is exposed to moisture, there is a danger of electric shock.
Your ULT must not be installed in a damp area or an area subjected to water spray. This may reduce the degree
of insulation and thereby cause electrical leakage or electrical shock.
Never directly pour water into the unit. The water may cause electrical shock or short circuit.
Do not place heavy objects on top of the unit, as falling objects may cause injury.
Never use gas lines, water mains, telephone lines or lightning rods as the grounding device for you ULT unit.
Improper grounding may cause electric shock or other danger.
Do not touch any electrical components, switches, or power cord with wet hands. Such action may lead to electric
shock.
When unplugging the power cord from the socket, grip the plug itself and pull it out. Do not pull on the power
cord as this may strip the wires out of the plug creating the risk of electric shock and fire.
Should there be any Malfunction in the equipment, power off the unit and unplug the power cord from the power
supply. Continuous operation in an abnormal condition may result in electric shock and fire.
Do not dismantle, repair, or modify the equipment. Such operations may result in fire or personal injury.
Before any repair and maintenance of the freezer, disconnect the power to avoid electric shock or injury to
personnel.
When repairing and maintaining your freezer, take precautions not to inhale any chemicals or aerosols floating
inside and outside the unit. They may be harmful to your health.
If the unit is not to be in use for a long period of time, make sure the power cord is unplugged.
Deteriorated insulation of the power cord may lead to electric shock or fire.
The freezer needs to be disposed by specialized personnel.
Do not use nay unapproved electrical components with the freezer.
Never store flammable, explosive or volatile materials in the unit, nor use any flammable spray near the unit, as
this may cause an explosion or fire.
Never store corrosive chemicals with acid or alkaline properties in the unit, as this can lead to damage to internal
components of the unit.
Do not use any glass containers with the unit. These containers may crack at low temperatures and cause injury.
Do not climb on top of the unit or place any object on it. Falling equipment may cause injury or property damage.
Do not use any hard objects such as nails and wires in opening or gaps such as air ventilation ports. Accidental
contact between a hard object and a moving part may result in electric shock or injury.
After restarting your unit from a power outage or shutdown, ensure that all settings are correct. Accidental
changes in settings may damage the stored products.
In the event of a power outage and recovery, wait for at least 5 minutes before turning the unit on again to avoid
damage to compressors and refrigeration system.

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The air filter for the condenser should be cleaned regularly. A dirty filter could cause a malfunction or the freezer
temperature to rise.
During any repair operations, gloves should be worn to prevent getting injured by sharp edges or corners.
Do not use bare hands to directly handle any stored products. The cold temperature of products and the interior
walls may cause frostbites.
Do not tilt the unit more than 45 degrees when moving it.
When moving the unit, be cautious not to cause injury to personnel or damage the unit. Do not attempt to use
the handle to lift or move the unit to avoid damaging the freezer or injuring personnel.
It is recommended the unit be installed and maintained by a professional to avoid any electrical hazard. The
replacement of any spare parts (battery etc.) shall be conducted by technicians approved by manufacturer.
Keep all ventilation openings in the enclosure or, in the structure for building-in, clear of obstruction.
Do not use mechanical devices or other means to accelerate the defrosting process, other than those
recommended by the manufacturer.
Do not damage the refrigerant circuit.
For equipment which use flammable insulation blowing gases, the instructions shall include information regarding
disposal of the equipment.
The instructions for split-systems that use a flammable refrigerant shall include the substance of the following
warning:
To reduce flammability hazards the installation of this equipment shall only be carried out by a suitably qualified
person.

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3.0 Product Features
This product can be used by clinical, pharmaceutical, scientific research, quarantine departments, etc. for the
preservation of articles under low temperature and by blood stations, hospitals, centers for disease control and
prevention, scientific research institutes, electronic chemical engineering and other enterprise laboratories,
biomedical engineering research institutes, ocean fishing companies, etc. for the preservation of red blood cells,
white blood cells, viruses, germs skin, skeletons, bacteria, seminal fluids, biological products, electronic devices,
special materials, etc. under low temperature.
•Temperature control
oTemperature is controlled by computer and numerically displayed and regulated in units of 1°C;
temperature range: -40°C to -86°C (-40°F to -123°F).
•Safety system
oVarious malfunction alarms (high temperature alarm, power failure alarm, probe failure alarm,
hot condenser alarm, high ambient temperature alarm, doors open alarm, low battery alarm).
oTwo types of alarms (Buzzer sounding alarm, Flashing light alarm).
oProtective functions (password protection, power up delay protection).
oAll independent components are safely grounded.
•Refrigeration system
oOptimized auto-cascade refrigeration technology and imported compressor, ensuring stronger
refrigeration capacity.
oHigh-performance insulation layer, ensuring excellent thermal insulation effect.
oUnique multi-layer door sealing structure and anti-condensation heating technology, effectively
reducing frosting.
oScope of application: applies to the preservation of articles by clinical, pharmaceutical, scientific
research, quarantine departments, etc. under low temperature.
o31.875” [810 mm] cabinet, placeable under the laboratory bench, saving the storage space.
•Ergonomic design
oLED display screen, showing temperature inside the box, ambient temperature and input voltage,
settable high/low temperature alarm and temperature inside the box, having fault warning
function.
oAdjustable shelf design, convenient for storage of articles.
oSafety door lock to prevent opening at will.
oWide climate zone design, suitable for the environment ranging from 50°F to 90°F [10°C to 32°C].
o“Innovative” integration of lock and handle and compact caster design, ensuring flexibility and
convenience.
oIntelligent condenser fan start and stop, saving energy effectively.
oAdvanced and practical network and remote warning.
NOTE: Not all models have all features mentioned above. For specific features, refer to the specification table of
each specific model. Due to the product improvement, the Nuaire ULT Freezer you get may not be
completely consistent with the illustration in the manual. The contents of this manual are subject to
changes without notice.

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4.0 Usage Precautions
•When the unit operates normally, the unit frame at the front near the door may be slightly warm; This
phenomenon is normal because hot tubing is embedded there to prevent condensation from forming on the
frame.
•Before samples are loaded into the unit, make sure the unit temperature has reached the set point then load
the samples into the freezer in batches. Each batch should not exceed 1/3 of the unit capacity, so that the
temperature does not rise while samples are being loaded.
•The temperature display indicates the temperature from the sensor location inside the unit chamber, which
may vary from the temperature at the center of the freezer but will gradually reach the actual temperature
of the freezer over time.
•Two access ports are installed in the back wall of the unit which can be used as the pass-thru for thermocouple
wires during testing and validation. Once all test wires are through the access port, make sure that the gap in
the port is sealed properly with insulation materials. Failure to seal the access port may affect the operation
of the unit. The port ring in the outer wall can also accumulate frost and ice.
•When cleaning the unit, mild or neutral detergent solution should be used. Never use a hard wire brush, acid,
gasoline, powder detergent, polishing powder, or hot water to clean the freezer, as these tools and materials
can damage the paint coating and plastic components. Never use gasoline or solution with volatile chemicals
to clean plastic or rubber parts.
•After the freezer runs for some time, a layer of frost usually forms on the interior liner and inner doors. When
this layer of frost becomes too thick, it can negatively impact the refrigeration performance of the unit. Energy
consumption can increase. If the thickness reaches about 3/16” [5 mm], use the supplied scraper to remove
the frost.
•Before removing the frost, temporarily transfer the stored samples to another freezer to prevent rising
temperature from damaging the samples.
•Behind the interior walls, there are many refrigeration lines. Do not use a knife, an ice pick, or a screwdriver
to cut ice and frost. This may damage not only the liner but also the refrigeration tubes.
•If the freezer is not in use for an extended period, turn off the power and backup battery. The power cord
should be unplugged.
•Basic performance claimed by the EMC test:
oThe basic performance of the box is that the refrigeration system can work normally.
oThe temperature cooling function inside the box can be achieved.
•Electromagnetic compatibility requirements:
a) This machine complies with the emission and immunity requirements specified in EN 61326-1.
b) This machine is designed and tested as Class A equipment specified in CISPR. In domestic situations, this
machine may cause radio interference and protective measures shall be taken.
c) It is recommended to evaluate the electromagnetic environment before using the machine.
d) It is prohibited to use this machine near strong sources of radiation (such as unshielded video sources),
otherwise it may interfere with normal operation of this machine.

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5.0 Product Installation
5.1 Installation Environment
•Ambient temperature: 50°F to 90°F [10°C to 32°C]. The ideal temperature is 65°F to 77°F [18°C to 25°C]. If
necessary, use an air-conditioning system to achieve the requires ambient condition.
•Environment humidity: less than 80% RH. At an environment of 90°F [32°C], humidity should be less than 57%
RH.
•Avoid large amounts of dust.
•Avoid mechanical swing or vibration.
•Highest recommended elevation for safe usage: 6,500 ft [2,000 m] above sea level.
•Input voltage: rated voltage ± 10%.
•The transient state is Category II facility (overvoltage category).
•Pollution Degree: 2
o An ULT is sensitive to its operating environment. If a unit is not installed in the conditions
mentioned above, it may not operate reliably.
o
The unit is intended for indoor use only.
5.2 Installation Site
For the equipment to achieve optimal operating conditions, an intended installation location should satisfy the
following requirements.
•Do not install the unit in a confined space. The doorway should be large enough for the unit to freely be
transferred in or out of the room if necessary. This is to allow the unit to be repaired easily and timely to avoid
damage to property.
•The location for installation should be flat and firm.
•There should be good ventilation and no direct sunlight.
•The freezer unit cannot share the same power socket with other equipment. The power plug should be
securely connected to the power socket.
•The power cord for the freezer should not be twisted or pinched.
•If the power cord needs to be extended, the cross-section of the extended cable must not be no shorter than
2 mm (14 gauge wire) and no longer than 10 ft [3 m].
•Before using the freezer, check the voltage supply. A voltage stabilizer to deliver rated voltage ± 10% is
recommended for areas in which the voltage is known to be unstable. The voltage stabilizer should be rated
at least 4000W.
•The freezer must be grounded.
•If the power socket is connected with a ground terminal, make sure to inspect it for proper connection before
using the equipment.
o
Do not ground the freezer through gas lines, water mains, telephone lines and lightning rods,
as this may lead to electric shock.
o
After installation, the power plug must be easily accessible to unplug in case of an emergency.
Nothing should block ventilation port of the freezer.

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5.3 Preparation Before Use
1. Remove packing material and straps.
2. Check the supplied accessories
•Check the items in the packing box according to the packing list. If anything does not match, contact the
manufacturer.
3. Placement
•This freezer is for indoor and dry conditions only.
•Reserve at least 1 ft [30cm] of clearance on each side of the freezer for proper ventilation.
4. Adjust Levelling Legs
•Rotate the levelling legs clockwise to extend them to level the unit.
5. Acclimation Period
•After adjusting and cleaning the unit, do not turn on the power. The freezer needs to acclimate to its
surroundings for at least 24 hours to ensure proper operation.
oTo handle the freezer before unpacking, forklift or package carrier may be used. If the forklift is used,
it shall be inserted at the bottom of blocking from the front or back of the freezer to move the
freezer. If the package carrier is used, it shall pick up at the bottom of blocking and can only pick up
the side of the freezer.
oAfter unpacking, you may push wheels for maneuvering.
oDuring handling, do not tip the freezer at more than 45° to avoid tipping.

OM0306 PAGE 10 OF 24 REV 1DECEMBER/2020
5.4 Initial Startup
When powering on the unit for the first time, follow the procedures below:
While keeping the unit empty, plug in the power cord
to dedicated power socket that meets all electrical
requirements.
Connect the freezer to the power supply, turn on the
power switch located on the side of the freezer (as in
the illustration on the right), and then turn on the
battery switch.
If the unit has a backup cooling system (optional) turn
off the backup system.
Set the unit to the desired temperature: Do not load the unit with any samples. Power up the
unit to let it run down to -60°C. Let it run at -60°C for 8 hours then lower it to -80°C. Observe
the unit performance for 24 hours for normal cycling to ensure that it is working properly.
Once the unit is confirmed to be operating properly, it is ready to be loaded with samples. In
principle, the freezer unit should be set at about 3°C above the desired temperature. For
example, if the storage temperature is -60°C, set the unit at -57°C. Load the unit with samples
in batches of less than 1/3 of the unit’s capacity. Make sure that the unit is capable of cycling
for more than 8 hours.
If the unit has a backup cooling system (optional), turn it on.
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