NuAire BLIZZARD NU-99729VFT Manual

OM0299
Series A
Revision 1
December 2020
NuAire, Inc.
2100 Fernbrook Lane
Plymouth, MN 55447
Toll-Free: 1-800-328-3352
Minnesota: [phone]
Fax: [phone]
NUAIRE BLIZZARD ULTRA LOW TEMPERATURE
VARIABLE FREQUENCY TOUCHSCREEN FREEZER
NU-99729VFT
OPERATION &MAINTENANCE MANUAL

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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..........................................................................................................4
3.0 Product Features.......................................................................................................................... 7
4.0 Usage Precautions ....................................................................................................................... 8
5.0 Product Installation.....................................................................................................................10
5.1 Installation Environment..................................................................................................................10
5.2 Installation Site ................................................................................................................................10
5.3 Preparation Before Use....................................................................................................................11
5.4 Initial Startup ...................................................................................................................................12
5.5 Operation after a Power Outage......................................................................................................13
6.0 Refrigerator Components............................................................................................................14
6.1 Control Panel ...................................................................................................................................14
7.0 Operation ...................................................................................................................................15
7.1 Homepage........................................................................................................................................15
7.2 Settings ............................................................................................................................................16
7.3 Graph ...............................................................................................................................................23
7.4 Inquiry..............................................................................................................................................24
7.5 Message...........................................................................................................................................29
7.6 Alarm ...............................................................................................................................................31
8.0 Cleaning Maintenance.................................................................................................................31
8.1 Cleaning the Freezer ........................................................................................................................32
8.2 Cleaning the Condenser Filter..........................................................................................................32
8.3 Defrosting ........................................................................................................................................32
8.4 Battery Maintenance .......................................................................................................................33
8.5 Disposal of Freezer...........................................................................................................................33
8.6 Disposal of Battery...........................................................................................................................33
9.0 Optional Accessories...................................................................................................................34
9.1 Temperature Recorder.....................................................................................................................34
9.2 LCO2 Backup Cooling System...........................................................................................................34
9.4 Electromagnetic Lock .......................................................................................................................35
9.5 Frozen Storage Racks and Storage Boxes.........................................................................................36
10.0 Troubleshooting..........................................................................................................................37
11.0 Refrigeration and Wiring Diagram ...............................................................................................38
11.1 Refrigeration Diagram......................................................................................................................38
11.2 Wiring Diagram ................................................................................................................................39
12.0 Specifications and Technical Data................................................................................................40
12.1 Specification Table...........................................................................................................................40
12.2 Technical Data..................................................................................................................................41
12.3 Global Warming Potential................................................................................................................41

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1.0 Packing List
Item
Quantity
Installation and Commissioning Manual
1
User manual/Spacer Installation Methods
1/1
Plastic bag
1
Ice scraper
1
Key
4
Spacer
2
2.0 Precautions for Safe Operation
Thank you for choosing a Nuaire Ultra Low Temperature (ULT) Freezer. Please read this manual for safe operation
of this product.
2.1 Safety Labels and Precautions
Warning
Electric
Shock
Combustible
Materials
Low
Temperatur
Slippery
Surface
Watch Your
Fingers and
Hands

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2.2 Precautions for Safe Operation
When the CO2/LN2 backup system is activated, the installation 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.
Only professional technicians can install the unit. Failure to do so may cause electricity or fire.
The freezer must be securely installed on a firm floor. Tilted installation may result in the product tipping over,
causing injury and damage.
Only use a dedicated power supply matching the requirement specified on the label to avoid fire and 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 2 mm² and
no longer than 3 m for products of 208V~230V/50Hz or 208V~230V/60Hz and no less than 3 mm² and no longer
than 3 m for products of 115V~/60Hz 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 (208V~230V/50Hz or 208V~230V/60Hz) or rated 20A (115V~/60Hz). Removal
of the ground prong is strictly prohibited for safety reasons under any circumstances. The electrical power plug
should 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 ULT unit.
Replacement of any spare parts should be performed by qualified technicians.
Never install your ULT in an unprotected area. If the unit gets wet, there is a danger of electric shock.
Your Blizzard ULT must not be installed in a damp area or an area subjected to water spray. Otherwise this may
reduce the degree of insulation which may cause electrical leakage or electrical shock.
Never directly pour water into the unit. The water may cause electric shock or short circuit.
Do not place any water container or heavy object on top of the unit. A falling object may injure an operator. If the
water spills into the unit, it may damage the insulation thereby causing electric shock.
Never use gas lines, water mains, telephone lines or lightning rods as the grounding device for your 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. This 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 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. Continuous operation in an abnormal condition may result in electric shock and fire.
Never disassemble, repair, or modify the unit yourself. Any such work carried out by an unauthorized person may
result in fire, or electric shock or injury due to a malfunction.
Before any repair and maintenance of the freezer, please disconnect the power to avoid electric shock or injury
to personnel.

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When repairing and maintaining your freezer, take precautions not to inhale any chemicals or aerosols floating
inside and outside the unit. This 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 usage of the equipment with such materials may harm the environment or
operator's health.
If the unit is not 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.
If the unit is to be stored unused in an unsupervised area for an extended period, ensure that doors are locked
completely with a key to prohibit unauthorized access.
The disposal of the unit should be accomplished by appropriate personnel. The doors should be removed prior to
disposal.
Do not use any non-manufacturer approved electrical components in the freezer.
Never store flammable, explosive or volatile materials in the unit and do not 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 cause damage to internal
components of the unit.
Do not place any glass container or enclosed container into the freezer. These containers may crack at low
temperatures causing injury to operators
Do not put the packing plastic bag within reach of children as suffocation may result.
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 to explore any openings 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 chamber of the appliance unless they are recommended by the
manufacturer.
The appliance must be positioned so that the plug is accessible.
The power plug is used as the disconnecting device.
The appliance must be placed on a solid and flat surface, or excessive vibration and noise may be produced when
the appliance in operation.
If the power cord is damaged, it must be replaced by a qualified technician to avoid an electrical hazard.
To avoid the risk of electric shock, this equipment must only be connected to a supply main with protective
ground.
There should be at least 1 ft (30 cm) space between the surrounding walls and the freezer for ventilation.
Equipment cannot run in the condition of rich O2 and flammable gas or liquid.
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, be sure to wait for at least 5 minutes before turning the unit on
again to avoid damage to the compressors and refrigeration system.
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 the products and the
interior walls may cause frostbite.
Hold firmly onto the handle to close the door to avoid pinching your hands.
Do not tilt the unit more than 45 degrees when moving the unit.
When moving the unit, make a clear path to avoid injury to personnel and damage to the unit.
Do not attempt to use the handle to lift or move the unit to avoid damaging the freezer or injuring personnel.
Maximum loading on each shelf should be no more than 100 Lbs. (50 kg) and total loading for whole unit should
be no more than 400 Lbs. (200 kg). Heavier loads may cause damage to the shelving system.

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Keep ventilation openings, in the appliance enclosure or in the built-in structure, clear of obstructions.
Do not use mechanical devices or other means to accelerate the defrosting process.
Do not damage the refrigerant circuit.
Unauthorized opening of the top cover of the control cabinet is 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 a storage or not in use for a long time, the battery should be tested for low
capacity because the battery may have already fully discharged. Should this occur, turn on the battery switch and
run the unit for about a week to fully charge up the battery.

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3.0 Product Features
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, viruses, germs, skin,
bones, bacteria, sperm, biological products, electronic components, and low temperature testing samples of
special products, etc.
•Temperature control
oTemperature is controlled by computer and numerically displayed and regulated in units of 0.1°C;
temperature range: -40°C to -86°C.
•Safety system
oVarious malfunction alarms (high/low temperature alarm, power failure alarm, probe failure
alarm, hot condenser alarm, high ambient temperature alarm, door ajar alarm, low battery
alarm).
oTwo types of alarms: Audible (buzzer sound) and Visual (flashing light).
oMultiple levels of protection are standard including passcode and time-delayed start.
oAll components are electrically grounded.
•Refrigeration system
oOptimized multiple refrigeration technology with top brand frequency compressors offering
better refrigeration capability.
oExcellent temperature preservation layer providing optimal temperature preservation effect.
oExclusive sealing structure of multiple doors and hot tubing for condensation prevention can
reduce the frost effectively.
•Ergonomic design
oTouchscreen display to indicate freezer temperature, ambient temperature, and input voltage.
Control panel to set the high/low temperature alarm and inner temperature. All malfunction
alarms are also shown on the display.
oDesigned with adjustable shelves, suitable for product storage.
oSafety lock design prevents accidental opening of doors.
oInstallation in broad range of ambient temperature range of 10 ℃to 32 ℃environment.
oUnique all-in-one latch design and compact caster features allow ease of operation and
maneuvering.
oCondensing fan motors are automatically controlled to turn on and off for energy saving.
oNetwork and remote alarm contacts are available for convenient connection and communication.
NOTE: Not all models have all features mentioned above. For specific features, please 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
•While the unit is operating, the door frame will become slightly warm. The embedded hot gas halo tube
provides latent heat to prevent condensation to from on the door frame.
•Before samples are loaded into a freezer, make sure the unit has reached the set temperature. Samples should
be loaded into the freezer in batches. Each batch should be no more than 1/3 of the freezer capacity. This
process allows the freezer to pulldown the temperature in a reasonable time without damaging the
compressor.
•The temperature display indicates the temperature where the temperature sensor is mounted inside the unit
chamber, which may vary from the temperature at the center of the freezer, but it will gradually reach the
actual temperature of the freezer over time.
•Two access ports are available for testing in the back of the freezer. Thermocouple wires can go through the
port holes to reach the interior of the freezer for temperature mapping. The gap of the holes should be sealed
with insulation materials so that the interior temperature is not influenced by the ambient temperature.
•When cleaning the unit, mild and neutral detergent solution should be used. Never use a hard wire brush,
acid, gasoline, detergent powder, polished powder or hot water for cleaning. These tools and materials can
damage the paint and coating of the unit. Particularly, never use gasoline or a 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 wall and inner doors. When
the frost gets too thick, the refrigeration effect can be impaired. Energy consumption will increase. If the
thickness reaches 3/16” (5 mm), please use the supplied scrapper to remove the frost.
•Before removing the frost, temporarily transfer the stored samples to another freezer. This is so that the
temperature does not rise in the unit and damage the samples.
•Behind the interior walls, there are many refrigeration tubes. 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 long time, please turn off the power and switch off the backup battery. The
power cord should be unplugged.
•Federal Communications Commission (FCC) Interference Statement
oThis equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules.
oThese limits are designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and can radiate radio frequency energy and,
if not installed and used in accordance with the instructions, may cause harmful interference to radio
communications.
oHowever, there is no guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which can be determined
by turning the equipment off and on, the user is encouraged to try to correct the interference by one
of the following measures:
-Reorient or relocate the receiving antenna.
-Increase the separation between the equipment and receiver.
-Connect the equipment into an outlet on a circuit different from that to which the receiver
is connected.
-Consult the dealer or an experienced radio/TV technician for help.
•This device complies with Part 15 of the FCC Rules. Operation is subject to the following two condition:
1. This device may not cause harmful interference
2. This device must accept any interference received, including interference that may cause undesired
operation.

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FCC Caution: Any changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate this equipment.
•RF exposure warning
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This
equipment must be installed and operated in accordance with provided instructions and the antenna(s) used
for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and
must not be collocated or operating in conjunction with any other antenna or transmitter.
This equipment complies with ISED RSS-102 radiation exposure limits set forth for an uncontrolled
environment. This equipment should be installed and operated with a minimum distance of 20cm between
the radiator and any part of your body.
Pour se conformer aux exigences de conformité CNR 102 RF exposition, une distance de séparation d'au moins
20 cm doit être maintenue entre l'antenne de cet appareil ettoutes les personnes.
Contains FCC ID: 2ASR8NFCV3, 2ASR8SC3832.
This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation,
Science and Economic Development Canada’s licence-exempt RSS(s). Operation is subject to the following two
conditions:
1. This device may not cause interference.
2. This device must accept any interference, including interference that may cause undesired operation
of the device.
L’émetteur/récepteur exempt de licence contenu dans le présent appareil est conforme aux CNR
d’Innovation, Sciences et Développement économique Canada applicables aux appareils radio exempts de
licence. L’exploitation est autorisée aux deux conditions suivantes :
1. L’appareil ne doit pas produire de brouillage;
2. L’appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d’en
compromettre le fonctionnement.
Do not dispose of electrical appliances as unsorted municipal waste, use separate collection facilities.
Contact your local government for information regarding the collection systems available.

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5.0 Product Installation
5.1 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 57% RH.
•Installation area should be clean and free from large amounts of dust.
•Installation area should be free from vibration and shocks.
•Highest recommended elevation for safe usage: 2,000 m above sea level.
•Input voltage: rated voltage ± 10%.
o An ULT is sensitive to its operating environment. If the unit is not installed in the conditions
mentioned above, it may not operate reliably.
o
The unit is intended for indoor use only. Improper use may result in damage to the unit or injury.
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
Nuaire support immediately.
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.

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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 desire 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.
1
2
3
4
5
6

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•If the freezer temperature warms up, and the issue can’t be resolved within a short time, please transfer the
stored products to another freezer to avoid potential damage.
•Before placing samples in the freezer for storage, check the freezer temperature to make sure the
temperature meets the storage requirement for the samples. This is to prevent any potential damage to the
samples due to incorrect storage temperature.
•Since it takes time to remove lower the temperature of the stored product, there can be a difference between
the set temperature and the displayed temperature. This difference will get smaller as the set point is lowered.
Samples must be loaded in batches, while gradually decreasing temperature setting. The process should be
repeated until the final temperature is reached.
•Do not use any unauthorized mechanical tools or other means to accelerate the defrosting process.
•Do not damage the refrigeration circuit.
•Do not use any unapproved electrical components in the freezer.
It is not recommended to load excessive amounts of samples into the unit at one time. Overloading may result
in inadequate performance. The freezer and the compressors can become overheated and malfunction.
5.5 Operation after a Power Outage
Your ULT freezer control settings are stored in its memory system. Should there be power outage and
recovery, the unit can resume its operation based on the previous settings.
oIn the event of a power outage and recovery, be sure to wait for at least 5 minutes before turning the unit
on again to avoid damaging the compressors and refrigeration system.
oIf the unit is not 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.

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6.0 Freezer Components
6.1 Control Panel
LCD Touchscreen
Door Handle
(With Lock)
Component
Access Panel
Leveling Leg
Caster

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7.0 Operation
7.1 Homepage
The Homepage can display the real-time internal temperature, ambient temperature, set point, input voltage,
network state, user login status, freezer health status, temperature graph, and message/ note book, backup
system state (optional), electromagnetic lock state (optional), etc.
Icon of real-time internal temperature:
The icon reflects the health status of the freezer by changing colors:
Green: System is operating normally.
Yellow: System occurs a general alarm that does not affect the internal temperature. Example, ambient
temperature alarm.
Red: System has a serious alarm affecting the internal temperature. Example, power failure alarm.
Homepage Symbols:
Tap to enter the sample management interface
Tap to enter the graph viewing interface, where temperature records can be downloaded
Tap to enter the information search interface
Tap to enter the freezer setting interface
Indicates that the network is enabled
Indicates that the electromagnetic lock has been installed and is in the locked state. (Optional)
Tap to enter the configuring the sample bank server address and port interface.
Tap this button to enter the Alarm Record interface where the alarm record can be downloaded. When occurring
a serious alarm that affects the temperature inside the freezer, this icon turns Red, and when occurring a general
alarm not affecting the internal temperature, the icon turns Yellow. The buzzer can be cancelled after tapping.
Click to enter the message and notebook interface.

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Backup system Indicates that the Backup System status:
Green: Backup System is running.
Grey: Backup System is off.
7.2 Settings
•[Temperature]
Set the internal temperature and high- / low- temperature alarm value. Select the internal temperature
value or high-/ low- temperature alarm value to be set, and then use the button of “+”/ “-” for adjustment
(You can also pop up a value selection box by clicking the value and selecting the value by scrolling the
selection box up and down). Click Save to finish settings.
[Set Point]:
Use to set the required temperature inside the freezer, with the adjustable range of -10℃~ -86℃.
[Low temperature alarm]:
Use to set the alarm value of low temperature alarm inside the freezer, with the adjustable range of -
15℃~-99℃, which needs to be lower than or equal to the internal temperature value minus 5℃. When
the set value of internal temperature is changed, if the low temperature alarm value is not lower than or
equal to the temperature value inside the freezer for more than 5℃, the low temperature alarm value
will be automatically adjusted to the set value of internal temperature - 5℃.

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If the low temperature alarm value is lower than or equal to the temperature value inside the freezer for
more than 5℃, the low temperature alarm value will not change.
[High temperature alarm]:
Use to set the alarm value of high temperature alarm inside the freezer, with the adjustable range of 0℃
~-81℃, which needs to be more than or equal to the internal temperature value plus 5℃. When the set
value of internal temperature is changed, if the high temperature alarm value is not more than or equal
to the temperature value inside the freezer for more than 5℃, the high temperature alarm value will be
automatically adjusted to "the set value of internal temperature +5℃.
If the low temperature alarm value is lower than or equal to the temperature value inside the freezer for
more than 5℃, the low temperature alarm value will not change.
•[Initial]
Tap to set the language, date, time. Click any one value to pop up a selection box, and then you can select
more values by sliding the values in the selection box up and down. When the setting is complete, click
"Save", and then you can see that the time in the upper middle of the screen will be synchronized to the
set value
[Language Selection]:
Select the language.
[Timezone Adjustment]:
Select the current location’s timezone.
[Time Adjustment]:
Set the time value to the local actual time. The default value is read from the main control board. If there
is no communication with the main control board, the last displayed time shall be the default value. NOTE:
If the time value does not match the local time, it will affect the time display of the curve.
[Temperature Scale]:
Set the temperature standard, Celsius (℃) or Fahrenheit (℉).

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•[Operation]
Tap to set the alarm volume, screen brightness, screen auto-lock, auto-logout time, operational mode,
account login mode, time delay to alarm, default display range of graph, time delay to start, ambient
temperature alarm, time to door opening alarm, update and reboot.
[Alarm Volume]:
Adjust the slider to decrease (to the left) or increase (to the right) the volume of the alarm.
Tap to "Mute".
[Screen Brightness]:
Adjust the slider to decrease (to the left) or increase (to the right) the brightness of the LCD screen.
[Screen Auto-Lock]:
Tap to set how long before the screen will enter the sleep state for protection after having not clicked it
to extend the service life of the screen, with the default value of 5min. Selectable options include: 5min,
10min, 15min, 20min, and Never. if you choose “Never” the screen will enter the screen saver 5 minutes
later. After the screen sleep, click anywhere on the LCD screen, it will automatically wake up and enter
the homepage.
Choose "never" after no operation within 5 mins the display will enter screensaver mode.
[Auto-Logout Time]:
Tap to set how long the logged-in account will automatically log out after having not carried out any
operation to protect the account security, with the default values of 5min. Selectable options include:
5min, 10min, 15 min and 20min.
[Operational Mode]:
High performance: Provides high temperature uniformity and stability of the temperature inside the
freezer to store the sample with a very strict temperature control requirements of the internal
temperature.
Energy saving: Compared with high-performance mode, it can save up to 10% of electricity. This mode
has less strict temperature control requirements of the internal temperature.
•[Backup]
Tap to turn the backup system ON/OFF, type of backup system, and injection temperature, and projected
injection time. It can set when connecting with backup system but cannot set when there is no backup
system, and the display will show in gray.

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[Backup System]:
Tap to turn the backup system ON/OFF (optional), click "On"; and then click "Off" after the completion of
use.
[Backup System Type]:
Liquid Nitrogen (LN2) or Liquid Carbon Dioxide (LCO2)
[Set Injection Temperature]:
Set the temperature when the backup system starting spraying:
Liquid nitrogen (LN2), the default temperature is -70℃, with the adjustable range of 0 ~-100 ℃.
Carbon dioxide (LCO2), the default temperature is -70 ℃, with the adjustable range of 0 ~-70℃.
NOTE: The set spraying temperature cannot to be lower than the high-temperature alarm value. If the
set spraying temperature is lower than the high-temperature alarm value, it cannot be saved.
[Project Injection Time]:
When installing a backup system, the user can fill enter the estimated usable time of the backup system.
When needed to confirm the remaining conditions after the backup system has been used, the user can
query its cumulative spraying time, and then judge the usage conditions of the backup system through
the difference between these two.
[Injection Test]:
When the temperature inside the freezer does not reach the set spraying temperature, you can tap
[Injection test] to simulate the spraying conditions to confirm whether the spraying system can be
normally used. If the displayed temperature inside the freezer is greater than the set temperature, after
pressing the button of “Injection test", the displayed temperature is unchanged, and the indicator light of
backup system on the homepage is ON; at this time, control to open the solenoid valve for spraying, and
stop the spraying 10 seconds later. If he displayed temperature inside the freezer is less than the set
temperature, after pressing the button of “Injection test", the displayed temperature changes rapidly to
the set temperature; at this point, control to open the solenoid valve for spraying, and stop the spraying
10 seconds later; after that, the displayed temperature will return back to the actual temperature inside
the freezer.

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•[Network]
Tap to set the network ON/OFF : After the network search is completed, click the corresponding network,
and enter a password for login, then connect to the network successfully. A Wi-Fi connections is
recommended so that the touch screen can be remotely updated.
[Network Name]: Connected Wi-Fi name