Thermo Scientific LTX108 Manual de usuario

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.

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.

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.

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

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

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.

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

• 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:

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