Thermo Scientific LTX108 User manual

LTX108 • 5/12/09
Explosion-Proof, Flammable Materials
Storage & General Purpose Laboratory
Refrigerators,
Refrigerator-Freezers and Freezers

Table of Contents
Safety Information ........................................................................................................................................................3
Alert Signals ..........................................................................................................................................................3
Overview ......................................................................................................................................................................4
Explosion-Proof Refrigerators and Freezers ........................................................................................................4
Flammable Materials Storage Refrigerators and Freezers....................................................................................4
General Purpose Laboratory Refrigerators, Freezers and Refrigerator/Freezers ................................................5
Specifications ..............................................................................................................................................................6
Environmental Operating Conditions ....................................................................................................................6
Unpacking and Installation ..........................................................................................................................................7
Shipping Carton ....................................................................................................................................................7
Location ................................................................................................................................................................7
Clearance ..............................................................................................................................................................7
Leveling..................................................................................................................................................................7
Be Advised ............................................................................................................................................................7
Electrical ................................................................................................................................................................8
Explosion Proof Installation ..................................................................................................................................9
Operation....................................................................................................................................................................12
Start-Up Procedure..............................................................................................................................................12
Restart Procedure ..............................................................................................................................................12
Manual Defrosting................................................................................................................................................12
ow to Save Energy............................................................................................................................................13
Safety Tips ..........................................................................................................................................................14
Troubleshooting ..........................................................................................................................................................15
Maintenance ..............................................................................................................................................................16
Cleaning of Units: Before Beginning....................................................................................................................16
Cleaning Interior/Exterior/Door Gaskets ..............................................................................................................16
Condenser ..........................................................................................................................................................16
Replacement Parts ....................................................................................................................................................17
Warranty ....................................................................................................................................................................20

Warning
Warnings alert you to a possibility of
personal injury.
Caution
Cautions alert you to a possibility of
damage to the equipment.
Note
Notes alert you to pertinent facts and
conditions.
Hot Surfa e
ot surfaces alert you to a possibility of
personal injury if you come in contact with
a surface during use or for a period of
time after use.
Alert Signals
DANGER: RISK OF C ILD ENTRAP-
MENT. BEFORE YOU T ROW AWAY
YOUR OLD REFRIGERATOR OR
FREEZER:
• TAKE OFF DOORS
• LEAVE T E S ELVES IN T E
PLACE SO T AT C ILDREN
MAY NOT EASILY CLIMB
INSIDE.
3
Safety Information
Thank you for selecting Thermo Scientific for your equip-
ment needs. These instructions contain important operat-
ing and safety information. The user must carefully read
and understand these instructions before using the unit.
Your unit has been designed to optimize function, reliabili-
ty, safety and ease of use. It is the user’s responsibility to
install the unit in conformance with local electrical codes.

Explosion-Proof Refrigerators
and Freezers
Conventional refrigerators and freezers are not only
unsuitable for storing flammable materials; they can cre-
ate potential hazards in a facility. Such units have several
components in their electrical and refrigeration systems
that can trigger explosions of flammable air-vapor mix-
tures inside the unit or from the immediate surrounding
area.
Explosion-proof models are specifically designed and
engineered to prevent the triggering of an explosion inside
or outside of the unit in a Class I, Groups C and D haz-
ardous material environment.
It is important to note that Explosion-Proof models must
be connected to the power supply source by rigid metal
conduit or mineral-insulated cable with proper fittings suit-
able for Class I, Groups C and D hazardous locations. In
addition, the wires inside the conduit must be sealed.
Flammable Materials Storage
Refrigerators and Freezers
These Thermo Scientific units will prevent potentially
destructive explosions in any facility by meeting the stan-
dards established by Underwriters’ Laboratory, Inc.,
OS A and National Fire Protection Association for stor-
age of hazardous materials. They also are designed to
comply with National Fire Protection Association
Standards Nos. 45 and 56C, as well as OS A Article No.
29 CFR 1910.308. Thermo Scientific Flammable Materials
Storage Refrigerators/Freezers are manufactured for
safe, cold storage of volatile materials.
Flammable Material Storage (FMS)
Refrigerators/Freezers will prevent an explosion from
occurring inside the unit. These units have no internal
electrical components that could trigger an explosion of
hazardous materials inside the unit. They are NOT
designed for use in Class I, Groups C and D environ-
ments—for these locations use a Thermo Scientific
Explosion-Proof Refrigerator.
4
Overview

General Purpose Laboratory
Refrigerators, Freezers and
Refrigerator/Freezers
Features can include white, textured steel cabinet, seam-
less ABS plastic liner, magnetic door latch(s),
polyurethane insulation, rust proof shelving. Depending
upon the model required additional features are available.
5
OVERVIEW

Specifications
Environmental Operating Conditions
POLLUTION DEGREE*: 2
INSTALLATION CATEGORY*: II
ALTITUDE: 2000 Meters MSL (Mean Sea Level)
UMIDITY: 80% maximum, non-condensing
ELECTRICAL SUPPLY: 120VAC or 240VAC
VOLTAGE TOLERANCE: ±10% of normal rated line
TEMPERATURE: 15ºC to 40ºC
PRODUCT USAGE: This product is intended for use indoors only
*Refer to IEC 664-1
6

7
Shipping Carton
This should be inspected upon delivery. When received,
carefully examine for any shipping damage before
unpacking. If damage is discovered, the delivering carrier
should both specify and sign for the damage on your copy
of the delivery receipt.
Open the carton carefully making certain that all parts are
accounted for before packaging materials are discarded.
After unpacking, if damage is found, promptly report it to
the carrier and request a damage inspection promptly.
IMPORTANT: Failure to request an inspection of damage
within a few days after receipt of shipment absolves the
carrier from any liability for damage. You must call for a
damage inspection promptly.
Location
Locate your unit in the most convenient place and near a
grounded electric outlet. If units are placed on a counter-
top, the front should be 3" or more back from the edge to
avoid accidental tipping of the unit.
If possible, locate your unit out of direct sunlight and away
from heat sources such as a radiator, stove or heat duct.
Clearance
Position the unit so that there is a m n mum clearance of
12” on the top, m n mum of 3” at the back, and m n mum
of 2” on each side. It is recommended that even more
space be left at the back of the unit in case maintenance
is required.
Leveling
This unit must be level. Rotate the leveling screws, locat-
ed under the front corners of the unit, until the unit is
level. If the floor is seriously out of level, you may need to
shim the corners with thin sheets of metal.
Unpacking and Installation
Warning
Unless unit is specifically designed for
combustible or flammable atmos-
pheres DO NOT use in the presence
of flammable or combustible materials
or explosive gases. DO NOT use in
the presence of pressurized or sealed
containers - fire or explosion may
result causing death.
Warning
DO NOT heat any substance above a
temperature that will cause it to emit
toxic fumes. Death or severe injury
may result.
Caution
Before connecting the final power sup-
ply, check the electrical characteristics
of the unit nameplate to see that it is
in agreement with the power supplied.
In addition, power should be wired to
the unit according to the electrical
schematic and all applicable codes.
Only qualified electricians should work
on the electrical portion of any unit
installed.
Caution
Solutions used to clean coils or neu-
tralize bacteria growth must not be
corrosive to metals (enamel-coated
steel) and materials used in the main-
tenance of this equipment - damage
can result: use a soft cloth and warm
water to clean.
Be Advised:

Electrical
Units must be connected to a grounded outlet matching
the nameplate and/or the information furnished in this
manual.
If you are not sure about the outlet, you should contact a
qualified electrician for assistance.
The unit should always be connected to its own dedicated
outlet.
INSTALLATION
8
Caution
DO NOT REMOVE, under any cir-
cumstance, the grounding prongs
from the 3-prong power cord sup-
plied with all units.
Caution
DO NOT USE electrical extension
cords that may result in voltage loss
and possible hazardous operation.
Warning
Explosion-proof units do not come
with line cords. They require rigid con-
duit to be run directly in order to seal
off the fitting on thermostat housing.
This should be done by a licensed
electrician and follow all local and
electrician and follow all local electri-
cal codes. If any questions pertaining
to electrical safety arises, please refer
to article 501 of the National Electrical
Code.

9
Explosion-Proof Units Only:
How to Seal Killark®Box Conduit with Fiber and
Sealing Compound to Help Prote t Against
Explosions (Explosion-Proof Units Only):
The purpose of the procedure that follows is to build fiber
rope dams on the left and right hubs of the horizontal conduit.
The fiber rope damns will surround conduit wiring that is
housed inside the horizontal conduit.
When both the left and right fiber rope dams have been
pressed into place, sealing compound is poured between the
two and forms into an airtight plug.
All of this is done in order to prevent the very real threat of
gas entering the Killark box and a resulting serious explosion.
After the unit wires have been pulled through the horizontal
conduit the following procedure is required:
• Turn power off at the circuit breaker before proceed-
ing.
• Place a small amount of sealing compound gran-
ules, enclosed, into a clean mixing vessel. Add
small amounts of water while stirring until a thick
paste is formed, then carefully continue adding
smaller amounts of water until a thick gravy consis-
tency is achieved—NOT WATERY. Discard any
material that becomes too stiff to use. Never
attempt to restore workability by stirring in more
water.
• Locate silver Killark box, back/top-center of unit.
• Unscrew conduit domed-cover.
INSTALLATION
Unscrew and Remove Cover
Left Hub
ConduitDomed-Cover
ConduitOpening
HorizontalConduit
Right Hub
F gure 1: Seal ng the K llark Box

10
• Insert fiber rope material down into horizontal conduit opening. Pressing down firmly, work the material into
the left hub and—most importantly—being sure the material COMPLETELY SURROUNDS T E WIRING,
from the top to the bottom, completely blocking this end of the horizontal conduit.
INSTALLATION
Left Hub Right Hub
Wiring
F gure 2: Hor zontal Condu t, Cutaway
• Insert fiber rope material down into horizontal conduit opening. Pressing down firmly, work the material into
the right hub and—most importantly—being sure the material COMPLETELY SURROUNDS T E WIRING,
from the top to the bottom, completely blocking this end of the horizontal conduit.
Explosion-Proof Installation Continued:

11
INSTALLATION
• Pour sealing compound down in between the two fiber rope dams filling the remaining space. Pour slowly,
being careful not to trap air bubbles. Immediately wipe off any spilled sealing compound.
• Screw conduit domed-cover back onto conduit opening.
NOTE: INITIAL SETUP OF SEALING COMPOUND WILL OCCUR IN APPROXIMATELY 30 MINUTES OW-
EVER, T E SEALING COMPOUND REQUIRES A MINIMUM OF 8 HOURS ABOVE 32ºF TO DEVELOP
SUFFICIENT STRENGT TO WIT STAND EXPLOSIONS.
Explosion-Proof Installation Continued:

12
Operation
Start-Up Procedure
Rotate the control knob clockwise to lower the tempera-
ture and counterclockwise raise it.
To check chamber temperature, place a dial thermometer
on a shelf in the center of the chamber. Initially, rotate the
temperature control knob to an arbitrary setting. Allow
approximately 2 hours for the temperature to initially stabi-
lize. Check the temperature and compare with the dial
setting.
Adjust dial further to reach the desired operating tempera-
ture. After chamber initially stabilizes, allow 1/2 to 1 hour
for the chamber temperature to stabilize after subsequent
temperature adjustments.
Because the markings on the dial do not indicate specific
temperatures, use them AS REFERENCE POINTS ONLY
for any future setting of the temperature.
If the room thermostat is turned below 60ºF at night, con-
sider setting the temperature control one step colder. It
should be left at this setting for the nighttime period; return
temperature control to original setting when the room ther-
mostat is returned to its normal setting.
Restart Procedure
If unit is unplugged or turned off, allow 3 minutes before
restarting or plugging it back in.
Manual Defrost Procedure
(Where Applicable)
Do not use any sharp instrument, blade or scraper to
remove ice and frost on refrigerator surfaces because of
the very real danger of puncturing the cooling coil.
Do not use any electrical device to defrost the unit.
When frost accumulates to 1/4" or more, the operating
efficiency of the unit will be affected. Use the following
procedure to defrost manually:
Caution
Do not use in the presence of flam-
mable or combustible materials or
explosive gases. Fire or explosion
could result, causing death or
severe injury.

13
• Rotate the temperature control knob to the OFF
setting.
• Disconnect the power cord from its outlet.
• Remove contents of unit. If practical, wrap con-
tents in paper and then in a heavy blanket to
maintain temperature of items, especially those
removed from a freezer. Wear protective gloves
to prevent frostbite when handling cold items.
• Open door and allow free circulation of ambient
air.
• To speed the process, place pan of warm water
inside the chamber.
• Wipe out the interior.
• Replace contents.
• Reconnect power cord to outlet and set temper-
ature control to desired operating temperature.
ow to Save Energy
• Be sure to follow location suggestions as men-
tioned in the previous INSTALLATION section.
• Wipe moisture from glassware or other materials
before placing them in a unit.
• Don't overcrowd the unit. Too many items can
increase electrical energy demand in order to
keep everything cool.
• Close the door as soon as possible in hot,
humid weather.
• Make certain that the door is closed tightly.
• As soon as frost has accumulated to 1/4”,
defrost.
OPERATION

• Keep containers covered, when possible, to
reduce moisture buildup.
• Set operating temperature no colder than neces-
sary for the items being refrigerated.
Safety Tips
• After a unit is in operation, do not touch the cold
surfaces, particularly when hands are damp.
Skin may adhere to the extremely cold surfaces.
• Never disconnect your unit by pulling on the
power cord. Always grip the plug securely and
pull straight out from the outlet.
• Do not use a power cord that shows cracks or
abrasions. ave a qualified electrician repair or
replace damaged cords immediately.
14
OPERATION

15
In the event that your unit is not operating properly, check the following before calling for service assistance—
this may save you the cost of unnecessary service calls.
Troubleshooting
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16
Maintenance
Cleaning of Units: Before
Beginning
1. Disconnect power cord from its outlet.
2. Set the temperature control to the OFF position.
3. The unit designs permit easy and rapid cleaning
and should not take more than a few minutes.
Remember to wear protective gloves to prevent
frostbite, especially when removing items from
freezer units.
4. Do not use abrasive scouring powders, waxes,
solvents, furniture polish, undiluted detergents or
cleansers containing petroleum products on the
surfaces of units.
Cleaning Interior/Exterior/Door
Gaskets
A solution of mild soap and water can be used for clean-
ing the interior, exterior and door gaskets with a soft,
clean cloth. Rinse with clean water and dry thoroughly
before reconnecting and turning on the unit.
Condenser
With forced-fan vented units, remove the screws that
mount the grill to the unit. Pull temperature control knobs
straight out—this will expose condenser for cleaning.
Warning
Disconnect from the power supply
prior to maintenance and servicing.
Warning
Refer servicing to qualified personnel.

17
To obtain replacement parts information and pricing,
please call the Thermo Scientific Customer Relations
Department at 1-800-446-6060 and have the unit’s model,
serial and code numbers available. This information is
located on data plates on the rear of the unit.
Replacement Parts

18

19

20
One Year Limited Warranty
This Thermo Scientific product is warranted to be free of defects in materials and workmanship for one (1)
year from the first to occur of (i) the date the product is sold by the manufacturer or (ii) the date the product is
purchased by the original retail customer (the “Commencement Date”). Except as expressly stated above, the
MANUFACTURER MAKES NO OT ER WARRANTY, EXPRESSED OR IMPLIED, WIT RESPECT TO T E
PRODUCTS AND EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES, INCLUDING BUT NOT LIMITED
TO, WARRANTIES OF DESIGN, MERC ANT ABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
An authorized representative of the manufacturer must perform all warranty inspections. In the event of a
defect covered by the warranty, we shall, as our sole obligation and exclusive remedy, provide free replace-
ment parts to remedy the defective product. In addition, for products sold within the continental United States
or Canada, the manufacturer shall provide free labor to repair the products with the replacement parts, but
only for a period of ninety (90) days from the Commencement Date.
The warranty provided hereunder shall be null and void and without further force or effect if there is any (i)
repair made to the product by a party other than the manufacturer or its duly authorized service representa-
tive, (ii) misuse (including use inconsistent with written operating instructions for the product), mishandling,
contamination, overheating, modification or alteration of the product by any customer or third party or (iii) use
of replacement parts that are obtained from a party who is not an authorized dealer of Thermo Scientific prod-
ucts.
eating elements, because of their susceptibility to overheating and contamination, must be returned to the
factory and if, upon inspection, it is concluded that failure is due to factors other than excessive high tempera-
ture or contamination, the manufacturer will provide warranty replacement. As a condition to the return of any
product, or any constituent part thereof, to the factory, it shall be sent prepaid and a prior written authorization
from the manufacturer assigning a Return Materials Number to the product or part shall be obtained.
IN NO EVENT S ALL T E MANUFACTURER BE LIABLE TO ANY PARTY FOR ANY DIRECT, INDIRECT,
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, OR FOR ANY DAMAGES RESULTING FROM
LOSS OF USE OR PROFITS, ANTICIPATED OR OT ERWISE, ARISING OUT OF OR IN CONNECTION
WIT T E SALE, USE OR PERFORMANCE OF ANY PRODUCTS, W ET ER SUC CLAIM IS BASED ON
CONTRACT, TORT (INCLUDING NEGLIGENCE), ANY T EORY OF STRICT LIABILITY OR REGULATORY
ACTION.
For the name of the authorized Thermo Scientific product dealer nearest you or any additional information, contact us:
2555 Kerper Blvd., Dubuque, Iowa, 52004-0797
Phone: [phone] or 1-800-553-0039
Fax: [phone]
Web: www.thermo.com