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Operating Instructions
SAFETY
Before using any cryogenic refrigerator, read the
Handle with Care booklet provided with the unit.
It details safety precautions that must be understood before using the equipment. If a replacement booklet is needed, order publication TW-10
Handle with Care from your supplier.
Following are a few of the safety precautions
described in the Handle with Care booklet.
Please be sure to read the entire booklet.
Store and use these containers only in well
ventilated areas. In a confined area, nitrogen
gas from these units may cause suffocation by
displacing air needed for breathing. Install a
suitable oxygen monitor .
Do not touch liquid or cold metal surfaces
with your bare skin. The liquid nitrogen refrig-
erant in these containers is extremely cold: 196°C (-320°F). Exposure of skin or eyes to
liquid, cold gas or frosted parts could result in a
severe frostbite-like injury . Because of the
extremely low temperature, a face shield and
gloves must be worn when transferring liquid
nitrogen and material into or out of these containers.
Model(s) Liters/inch Liters/cm
HCL12/HC20 1.25 0.5
HCL21/HC34/
HC35/HC34
INSERTING OR REMOVING CANISTERS: To
prevent unnecessary loss of liquid nitrogen and
accumulation of ice, the necktube core (the
stopper) should remain in the container when
the stored material is not being accessed.
When accessing stored material, the necktube
core should be removed as briefly as possible.
When removing material from the canisters,
withdraw the canister just far enough to remove
contents. Completely withdrawing the canister
will unnesessarily expose the stored material to
warm, room temperature conditions.
2.3 0.9
TW-346
OPERATION
Filling: Adding liquid nitrogen to a warm con-
tainer may cause splashing and will generate a
significant volume of nitrogen gas as cold liquid
contacts warm refrigerator surfaces. Add liquid
slowly to minimize these effects. Be sure there is
adequate ventilation. Keep your head clear of
the heavy volume of vapor that may be produced. It is extremely cold and could case
personal injury .
WARNING
DO NOT OVERFILL. Over-filling may result in personal
injury due to liquid spillage.
DETERMINING LIQUID LEVEL. Liquid level
must be checked at regular intervals – refrigeration depends on the presence of liquid nitrogen.
The liquid level in the container can be determined with a dipstick. Insert the dipstick straight
into the container so that it rests on the canister
positioning fixture on the bottom of the unit. Af ter
5 to 10 seconds, withdraw the dipstick and wave
it back and forth in the air. A frost section will
form representing the depth of liquid in the
container.
WARNING
Never use a hollow rod or tube as a measuring rod.
When a warm tube is inserted into liquid nitrogen, liquid
will spout from the top of the tube and may cause
personal injury.
The liquid level chart shows volume of liquid
nitrogen vs. depth for HC Series refrigerators.
These values are approximate and are based on
a standard condition with no stored material in
the container . With stored material, the liquid
volume will be slightly less than the value of the
chart.
LIQUID LEVEL CHART
WARNING
Some canisters have liquid drain openings; some do
not. If canisters are completely removed from the
container, liquid nitrogen may remain in the canister
or drain from the bottom. When removing canisters,
stop briefly at the necktube to allow liquid to drain
completely, then handle the canister carefully to
prevent personal injury. Avoid direct canister contact
with bare skin. The use of proper personal protective
equipment is strongly urged – cryogenic gloves, face
shield and gown – to protect against splashing.
When room temperature product is added,
slowly lower the canister into the refrigerator to
reduce the boiling of refrigerant and the surge
of cold nitrogen gas. When inserting the
canister, tilt the bottom of the canister in the
direction of the index ring notch.
SECURING CONTENTS: The contents of all
models may be secured with a seal or lock
through tabs on the edge of the lid opposite the
hinge.
ROUTINE CARE & MAINTENANCE
If ice accumulates inside the necktube, a
general cleaning of the refrigerator should be
High Capacity Liquid
Nitrogen Refrigerators
HC SERIES
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scheduled as soon as the stored material can be conveniently transferred to another refrigerator. To clean the unit,
first remove stored material, then pour out the liquid,
disposing of it out-of-doors where the cold liquid will not
damage driveways and other surfaces. Warm the container
by purging it with air even after the container has warmed to
room temperature to evaporate any collected moisture.
When the container is ice-free and dry, rinse the inner
vessel with household bleach. Wash the inner vessel with a
40 to 1 ratio of water to laundry detergent solution. Rinse
and dry inside and out thoroughly before placing the
container back into service. Do not use sharp instruments
to chip ice; permanent damage to the container could
result. DO NOT attempt to fasten any device to the container. W elding, brazing, or piercing of the cont ainer in any
manner will cause permanent damage.
Refrigeration depends on the presence of liquid nitrogen in
the refrigerator. Be sure to maintain correct refrigerant
levels to prevent loss of stored material. Check liquid
levels regularly . If high evaporation rates are apparent
under normal operating conditions, the refrigerator may be
losing its vacuum. Sweating and the formation of frost on
the outer casing are indications that he vacuum integrity of
the refrigerator is not normal. All necessary steps should be
taken to protect the refrigerator’s contents. If these conditions persist, contact you supplier or Taylor-Wharton’s
Technical Response Department at 1-800-TW-TANKS
(898-2657) or e-mail us at cryotanks@taylorwharton.com
for information on how to conduct a normal evaporation rate
(NER) test in the field.
TRANSPORT ATION
Although these refrigerators are rugged, they can be
damaged or abused of otherwise mishandled. When
moving or transporting the refrigerator, take every precaution to prevent sliding, tipping, bumping, or dropping the
unit. All refrigerators must be kept upright. Refrigerators
containing liquid nitrogen must never be transported in
sealed compartments. V entilation must be assured to
prevent the displacement of air and the related suffocation
hazard.
RETURNS
Manufacturing defects are covered under the containers
limited warranty . Evidence of mishandling, such as dents on
the outer vessel or misalignment of the inner vessel are not
manufacturing defects. If you would like to return goods to
Taylor-Wharton for any reason, you must first obtain a
Material Return Authorization (MRA) number for tracking
purposes. Please have a description of your symptoms and
the refrigerator’s serial number ready. Cont act your supplier
or call Taylor-Wharton’s Technical Response Department at
1-800-TW-TANKS (898-2657) or email us at
cryotanks@taylorwharton.com.
ACCESSORIES
The following accessories are available for HC Series
refrigerators:
• Roller Base - with ball bearing swivel casters to provide
convenience and portability within a working area where
frequent container movement is necessary or desirable.
P/N R018-8C00 ................ HCL12,HC20
P/N R033-8C00 ................ HC34, HC35,
VHC35
• Liquid Level Measuring Rod - is graduated in both
inches and centimeters. This accessory is inserted into
the cryogenic refrigerant in order to determine the actual
liquid level
P/N R033-8C1 1................. all units
• A 7
th
Canister is available to increase the vial or straw
storage capacity of your container by 23% for the VAC35.
P/N R036-9C27 ................ VHC35
• Liquid Level Measuring Rod – is graduated in both
inches and centimeters. This accessory is inserted into
the cryogenic refrigerant to determine the actual liquid
level.
P/N R033-8C1 1................. for all units
• Low Liquid Level Alarm – for all passive monitoring for
refrigerant level. This battery-powered alarm is available
for units that may be used for long-term storage, where
an unusual low liquid could go unnoticed.
P/N R034-8C15 ................ for the HC34
P/N R037-8C15 ................ for the HC35
P/N R036-8C30 ................ for the VHC35
Common Parts
Lid ................................................. R033-9C11
Lid Hinge Pin (2 required).............. 6550-1000
Lid Hinge Pin Retainer................... 8956-1013
Handle (HCL12)............................. R010-5C11
Handle Pin (HCL12) ...................... 8631-5000
REPLACEMENT P ARTS
Refrigerators HCL12 HC20 HC34 HC35 VHC35
Canister,Single R012-9C24* R020-9C24 R034-9C24 R037-9C24 R036-9C24
Nectube Core R012-9C16* R020-9C16 R034-9C16 R037-9C16 R036-9C16
Ordering Information
Order all replacement parts and accessories from your distributor. Please include the part and model number of your
refrigerator, the part and model number, quantity , and description of each part requested. For more informaiton or
name of your local distributor, contact Taylor-Wharton at the address listed below.
*Replacement parts for nine
canister version: R011-9C24/
canister; R011-9C16/Necktube
core
Taylor-Wharton
4075 Hamilton Blvd.
Theodore, AL 36582
Phone: (251) 443-8680
(800) TW TANKS (898-2657)
Email: cryotanks@taylorwharton.com
www: taylorwharton.com
Fax: (251) 443-2250
7950-8346 TW-346