NuAire NU-99338JE User manual

NuAire Ultra Low Temperature
Freezer User Manual
OM0278
OM0278
Revision 2 May/2021
1 of 32
Release date: 5/17/2021
Introduction
Models:
NU-99338JE
NU-99486JE
NU-99578JE
NU-99728JE
NU-99828JE
NU-99420JE
NU-99338JGA
NU-99578JGA
NU-99728JGA
NU-99338JG
NU-99578JG
NU-99728JG
NU-99828JG
NU-99420JG

NuAire Ultra Low Temperature
Freezer User Manual
OM0278
OM0278
Revision 2 May/2021
2 of 32
Release date: 5/17/2021
Contents:
Product Features
1.0 It merits your trust from beginning to end
2.0 Temperature Control
3.0 Security System
4.0 Refrigeration system
5.0 User friendly design
6.0 Safety Label and Safety Precautions
7.0 Usage Precautions
Installation
8.0 Installation environment
9.0 Installation Location
10.0 Before Use Preparation
11.0 Initially Powering up
12.0 Operation after a power Outage
13.0 Freezer Parts
13.1 Vertical Type
13.2 Horizontal Type
14.0 Control Panels
15.0 How to Use the Freezer
15.1 Unlocking the Freezer
15.2 Setting the inner temperature
15.3 Setting the high temperature alarm
15.4 Setting the security code
15.5 Setting the startup delay timer
15.6 Alarm Test and low battery Test
15.7 Setting the USB storage time
15.8 Exporting USB data
16.0 Display and Alarm
17.0 Cleaning and Maintenance
18.0 Recycling the Rechargeable Battery
19.0 Optional Accessories
20.0 Troubleshooting
21.0 Refrigeration and Wiring Diagram
21.1 Refrigeration Diagram
21.2 Wiring diagram
22.0 Specifications, Technical Data and Packing list
22.1 Specification
22.2 Technical Data
22.3 Packing List
Warning:
A review should be conducted to establish risk associated with electromagnetic
compatibly. In the documentation for the user, a statement shall be included
indicates potential difficulties in ensuring electromagnetic compatibility in other
environments due to conductive as well as radiated disturbances.

NuAire Ultra Low Temperature
Freezer User Manual
OM0278
OM0278
Revision 2 May/2021
3 of 32
Release date: 5/17/2021
1.0 It merits your trust from beginning to end.
This Product is suitable for the ultra-low temperature storage of products in
applications such as clinical pharmaceutical, scientific research, and epidemic
institutions. It also can be used in blood stations, hospitals, centers for disease
prevention and control, science and research institutions, electronic and chemical
laboratories, biomedical engineering institutions, and open sea fishery companies to
store red blood cells, white blood cells, viruses, germs, skin, bones, bacteria, sperm,
biological products, electronic components, and low temperature testing samples of
special products, etc.
2.0 Temperature Control
Temperature is controlled by computer and numerically displayed and regulated in
units of 1°C; temperature range: -40°C to -86°C.
3.0 Security System
•Various malfunction alarms (high temperature alarm, power failure alarm, probe
failure alarm, hot condenser alarm, high ambient temperature alarm, door open
alarm, low battery alarm).
•Two types of alarms (Buzzer sounding alarm, Flashing light alarm).
•Protective functions (password protection, power up delay protection).
•All independent components are safely grounded.
4.0 Refrigeration system
•Optimized multiple refrigeration technology with top brand compressors offering
better refrigeration capability.
•Excellent temperature stability.
•Exclusive sealing structure of multiple doors and hot tubing for condensation
prevention and front reduction.
•Specially designed low temperature computer control, to prevent the normal
redundant.
•System from being erroneously controlled by the low temperature compressor.
5.0 User friendly design
•Equipped with LED display which can show the inner temperature, set temperature,
ambient temperature and input voltage. The display can also be used to set the
high/low temperature alarm and inner temperature, as well as show any
malfunction alarms.
•Designed with adjustable shelves suitable for product storage.
•Safe lock design prevents accidental opening of doors.
•Broad ambient temperature range design, suitable for usage to 32°C environments.
•Innovative design with integrated door locks and compact leveling legs, which are
flexible and convenient.
•Automatically open and close condensation fan to save energy.
•Equipped with networks, remote alarm functions which are advanced and practical.
•USB standard.

NuAire Ultra Low Temperature
Freezer User Manual
OM0278
OM0278
Revision 2 May/2021
4 of 32
Release date: 5/17/2021
6.0 Safety Labels and Safety Precautions
Dear Customer
Please read this manual for safe operation and use of this product.

NuAire Ultra Low Temperature
Freezer User Manual
OM0278
OM0278
Revision 2 May/2021
5 of 32
Release date: 5/17/2021
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 in order 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 in or unplug your
freezer unit in order to avoid potential explosion or fire.
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 floor. On an uneven surface may result
in the product tipping over thereby causing injury and damage.
Please 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 14Awg and no longer than 9ft for products of 220V~240V/50Hz or
220V~/60Hz and no less than 12Awg and no longer than 3m for products of
115V~/6Hz 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 16 a
(220V~240V/50Hz or 220V~/60Hz) or rated 20A (115V~/60Hz). Removal of the ground
prong be securely plugged into the socket.
A loose plug in the socket may cause fire.
The power socket intended for your ULT usage must be grounded to avoid electric
shock.
If the socket does not meet this requirement, the condition must be corrected by a
qualified technician before using the UL unit.
The replacement of any spare parts (battery, etc.) shall be conducted by approved
technicians.
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,
as 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.

NuAire Ultra Low Temperature
Freezer User Manual
OM0278
OM0278
Revision 2 May/2021
6 of 32
Release date: 5/17/2021
Do not place heavy objects on top of the unit, as a falling object may cause injury.
Never use gas lines, water mains, telephone lines or lightning rods as the grounding
device for you ULT unit. This type of improper grounding may cause electric shock or
other danger.
Do not touch any electrical components, switches or power cord with wet hands.
Such actions may lead to electric shock.
When unplugging the power cord from the socket, please 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
thereby causing 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. Continues operation in an abnormal condition
may result in electric shock and fire.
User must not dismantle, repair or modify the equipment. Such operations may result
in fire or personal injury.
Before any repair and maintenance of the freezer, please 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 poisonous, radioactive or other harmful materials need to be stored in the unit, the
Equipment should be located in a safe zone. Improper use of the equipment with such
materials may harm the environment or operator’s 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.

NuAire Ultra Low Temperature
Freezer User Manual
OM0278
OM0278
Revision 2 May/2021
7 of 32
Release date: 5/17/2021
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.
Do not use electrical appliances inside the compartments of the appliance unless they
are recommended by the manufacturer.
The appliance must be positioned so that the plug is accessible.
The appliance must be placed on a solid and flat surface, or excessive vibration and
noise may occur when the appliance is operating.
If your cabinet is to be discarded, you must remove the door and leave the shelves in
place. This will reduce the possibility of danger.
If the supply cord is damaged, it must be replaced by the manufacturer, its service
agent or similarly qualified persons in order to avoid a hazard.
Users must not dismantle, repair or modify the equipment. Such improper
operations
may result in fire or personal injury.
CP/IP foaming materials are flammable and require professional processing for
disposal.
No modification of this equipment is allowed.
To avoid the risk of electric shock, this equipment must only be connected with a
grounded supply.
There should be at least 12.5 in space between the surrounding walls and the freezer
for ventilation.
Equipment cannot be run with increased levels of O2 , flammable gas or liquids.
After restarting your unit from a power outage or shutdown, ensure that all setting
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.

NuAire Ultra Low Temperature
Freezer User Manual
OM0278
OM0278
Revision 2 May/2021
8 of 32
Release date: 5/17/2021
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, please 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.
Please open the lock first, then lift the handle.
Maximum weight per shelf is 50Kg/110lbs and weight of the entire unit should not
Exceed 200kg/440lbs. Heavy loads may cause damage to the shelving system.
Keep ventilation openings, whether the appliance enclosure or built-in structure, clear
Or obstructions.
Do not use mechanical devices or other means to accelerate the defrosting process,
unless preapproved by the manufacturer.
Do not damage refrigerant circuit.
Unauthorized opening of the top cover of the control cabinet prohibited to prevent
damage to the inside components or injury to the operator.
Turn the battery switch on before starting the unit; do not arbitrarily turn it off.
When the ULT unit has been placed in storage or not in use for a long time, its battery
should be tested for low capacity because the battery may have already released all
of its energy. Should this occur, please turn on the battery switch and run the unit for
about a week to fully charge up the battery.

NuAire Ultra Low Temperature
Freezer User Manual
OM0278
OM0278
Revision 2 May/2021
9 of 32
Release date: 5/17/2021
7.0 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 .03 in / [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 a period of time, turn off the power and backup
battery.
The power cord should be unplugged.

NuAire Ultra Low Temperature
Freezer User Manual
OM0278
OM0278
Revision 2 May/2021
10 of 32
Release date: 5/17/2021
Installation
8.0 Installation Environment
•Ambient temperature: 10°C to 32°C. The ideal temperature is 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 32°C, humidity
should be less than 57% RH.
•The intended location should be low in particulate count.
•The intended location should be vibration and shock free.
•Highest recommended elevation for safe usage: 2,000m above sea level.
•Input voltage: rated voltage ± 10%.
•An ULT is sensitive to its operating environment. If a unit is not installed in the
conditions mentioned above, it may not operate reliably.
•The unit is intended for indoor use only.
Do not dispose of electrical appliances as unsorted municipal waste, rather use
separate collection facilities. Contact your local government for information regarding
the collection systems available.