VWR International 47747-222 User manual

057-658-00 • Rev. B
© 2015
All rights reserved.Printed in U.S.A.
VWR Scientific Brand
Explosion-Proof and
Flammable Materials Storage,
Refrigerator-Freezers
Installation and Operation Manual
MODEL NO.
47747-222
47747-224
47747-226
47747-228

Table of Contents
Table of Contents
Safety Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Alert Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Intended Use Statement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Explosion-Proof Refrigerators and Freezers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Explosion-Proof Refrigerators, Freezers and Refrigerator/Freezers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Flammable Materials Storage Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Flammable Materials Storage Refrigerators and Freezers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Unpacking and Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Shipping Carton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Electrical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Be Advised . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
How to Seal Killark® Box Conduit with Fiber and Sealing Compound to Help Protect Against
Explosions (Explosion-Proof Units Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Start-Up Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Restart Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
How 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
Order From Your VWR Sales Office . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Domestic Warranty Two Years Full Warranty, Parts and Labor United States of America and
Canada . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
International Warranty 16 Month Parts Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Safety Information
Explosion-Proof & FMS Refrigerator-Freezers Installation and Operation Manual 1
Safety Information
Your satisfaction and safety are important to VWR and a complete understanding of this unit is necessary to attain these
objectives.
As the ultimate user of this apparatus, it is your responsibility to understand its proper function and operational
characteristics. This instruction manual should be thoroughly read and all operators given adequate training before
attempting to place this unit in service. Awareness of the stated cautions and warnings, and compliance with
recommended operating parameters – together with maintenance requirements – are important for safe and satisfactory
operation. The unit should be used for its intended application; alterations or modifications will void the Warranty.
This product is not intended, nor can it be used, as a sterile or patient connected device. In addition, this apparatus is not
designed for use in Class I, II or III locations as defined by the US National Electrical Code, unless otherwise noted.
Alert Signals
ON
OFF
Safety Alert Important operating instructions. To reduce the risk of injury or poor performance of the
unit read the user manual before putting the equipment into operation.
WARNING Indicates an immediately hazardous situation, which if not avoided, will result in death
or serious injury.
CAUTION Indicates an immediately hazardous situation, which if not avoided, may result in minor
to moderate injury.
CAUTION (Without Safety Alert Symbol) indicates a situation that may result in property damage.
Shock Hazard
Use of this equipment involves power supplies which convert line voltage to low voltage power.
Do not modify or use power supplies other than OEM equipment. Connection of the power supply
may require a properly grounded receptacle. Potential for electrical shock or equipment damage
exists if precautions are not followed.
Frost bite/ Low
Temperature Avoid contact with cold freezer surfaces potential for cold burns or skin sticking to cold surfaces.

Safety Information
2 Installation and Operation Manual Explosion-Proof & FMS Refrigerator-Freezers
DANGER RISK OF CHILD ENTRAPMENT
Before you throw away your old refrigerator or freezer:
• Take off doors
• Leave the shelves in the place so that children may not easily climb inside.
If the equipment is used in a manner not specified by the manufacturer, the protection provided by the
equipment may be impaired.

Intended Use Statement
Explosion-Proof & FMS Refrigerator-Freezers Installation and Operation Manual 3
Intended Use Statement
WARNING:
Only Explosion Proof Units or
Flammable Material Storage Units are to
be used for the storage of flammable
inventory/samples.
The Refrigerators/Freezers described in this manual are
for professional use only. These products are intended for
use in research for the storage of samples or inventory in
the following temperature ranges:
Refrigerators +1 °C to +12 °C
Freezers -12 °C to -20 °C
These are not considered medical devices and have
therefore not been registered with a medical device
regulatory body (e.g. FDA): that is, it has not been
evaluated for the storage of samples for diagnostic use or
for samples to be re-introduced to the body.
NOTE: Do not store corrosive materials in these units. Any
damage which occurs due to storage of corrosives will not
be covered under warranty claims.
Corrosive Materials Requiring Refrigerated or Frozen
Storage
• Only use models rated as Corrosion Resistant.
• Corrosion Resistant does not mean Corrosion Proof –
Care in storage is still required.
• Store only corrosive reagents/samples which truly
need reduced temperature storage.
• Flammable corrosive materials require Flammable
Material Storage or Explosion Proof models labeled
for the storage of corrosives.
• Containers must be wiped clean of moisture and
chemical residue before being introduced into the unit
and upon return from use.
• Containers must be sealed with either vinyl tape or
Parafilm®.
• Reagents/samples which release HX (X= F, Cl, Br, I)
on contact with moisture (e.g. Acyl halides,
Organosilyl halides etc.) are particularly damaging to
metals.
• Volatile amines will react with HX depositing salts
which will lead to corrosion of metal surfaces.
• Volatile organic acids can exacerbate metal surfaces
already compromised, be sure these are securely
sealed.
• Refrigerated compartments are cool or cold areas but
they are not to dry seal your reagents and samples.
• Bleach solutions release chlorine gas which can react
with other volatiles in the cooling chamber or directly
attacks metal surfaces.
• Periodically clean the interiors, clean up spills or
leaking containers.
• Failure to take precautionary actions may lead to
damage not covered by warranty claims.
Parafilm®is a registered trademark of Bemis Company,
Oshkosh, WI.

Explosion-Proof Refrigerators and Freezers
4 Installation and Operation Manual Explosion-Proof & FMS Refrigerator-Freezers
Explosion-Proof Refrigerators
and Freezers
Overview
Conventional refrigerators and freezers are not only unsuitable
for storing flammable materials; they can create potential
hazards in a facility. Such units have several components in
their electrical and refrigeration systems that can trigger
explosions of flammable air-vapor mixtures inside the unit or
from the immediate surrounding area.
VWR Scientific offers the largest explosion-proof selection in
the industry, including single and 2-door upright refrig-
undercounter refrigerators.
Motors and thermostats are designed to prevent the arcing
which can ignite a flammable air-vapor mixtures, In addition,
each unit has wiring, splices, a thermostat, a relay and a
compressor motor safely housed within an explosion-proof
enclosure of construction suitable for use in Class I, Groups C
and D. This means that things like the surface temperature of
compressors will remain below the flashpoint of any flammable
material likely to be found in Class I, Groups C and D,
Class I Zone 1 and Group IIB locations.
All models have heavy-gauge, rigid, braced-steel construction
with a durable enamel finish. Interiors have epoxy enamel or
ABS plastic construction. Each unit is insulated throughout for
energy-efficient operation.
These VWR Scientific units will prevent potentially destructive
explosions in any facility by meeting the standards established
by Underwriters’ Laboratory, Inc., OSHA and National Fire
Protection Association for storage of hazardous materials.
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 hazardous
material environment. These models feature stainless steel
refrigeration components that are more resistant to attack from
corrosive vapors than are aluminum or epoxy-coated
aluminum.
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.

Explosion-Proof Refrigerators and Freezers
Explosion-Proof & FMS Refrigerator-Freezers Installation and Operation Manual 5
Explosion-Proof Refrigerators, Freezers and Refrigerator/Freezers
Models 47747-226 and 47747-228
23.63” Wid, Two-door Refrigerator/Freezer
Features:
• Overall 10.1 cu.ft.
• Three adjustable shelves
• Four door shelves
• Hydraulic thermostat
• Adjustable natural air-flow vent
• Manual defrost
• ABS plastic interior
• White color
WARNING: For FMS and EXP units where flammable materials are stored in the cooling chamber. The
cooling chamber is considered a Class I Div1 or Class I Zone 1 hazardous location. Any monitoring
devices placed in the cooling must have an intrinsically safe rating from an appropriate certification body,
such as UL, CSA, FM etc. (this includes battery or solar powered devices). Thermocouples building
monitoring systems must be wired through an electrical barrier designed to provide isolation against
voltage and current spikes, which could cause a spark resulting in a fire or explosion. It is the end users’
responsibility to meet these requirements. VWR cannot assist with the selection of devices,
recommend, approve or design any device or monitoring circuit.
Model Refrigerator Chamber
Dimensions H x W x D
inches (cm)
Freezer Chamber
Dimensions H x W x D
inches (cm)
Total Vol.
Cu. Ft. Exterior Dimensions H
x W x D inches (cm)
47747-226 38.25" x 19.75" x 18.25"
(97.2 x 50.2 x 46.4 cm) 18.25" x 18" x 11.25" (46.3 x 45.7 x 28.6 cm) 10.1 59.75" x 23.63" x 28.6"
(151.77 x 60 x 76.2 cm)
47747-228 38.25" x 19.75" x 18.25"
(97.2 x 50.2 x 46.4 cm) 18.25" x 18" x 11.25" (46.3 x 45.7 x 28.6 cm) 10.1 59.75" x 23.63" x 28.6"
(151.77 x 60 x 76.2 cm)
Model Electrical Characteristics
Volts/Hz, Amps Refrig. Temp. Range ° C (° F) Freezer Temp. Range ° C (° F) Net Wt. Lbs. (kg) Ship Wt. Lbs. (kg)
47747-226 115/60, 1.9 1° to 12°
(33.8° to 53.6°) -12° to -20° (10.4° to -4°) 120 (55) 150 (68)
47747-228 230/50, 1.0 1° to 12°
(33.8° to 53.6°) -12° to -20° (10.4° to -4°) 120 (55) 150 (68)
Note: Amps listed area at normal run mode.Starting amps may be higher.
VWR Scientific reserves the right to change specifications without prior notice.

Flammable Materials Storage Units
6 Installation and Operation Manual Explosion-Proof & FMS Refrigerator-Freezers
Flammable Materials Storage
Units
Overview
These VWR Scientific units will prevent potentially
destructive explosions in any facility by meeting the
standards established by Underwriter’s Laboratory, Inc.,
OSHA and National Fire Protection Association for
storage of hazardous materials.They also are designed to
comply with National Fire Protection Association
Standards Nos.45 and 99, as well as OSHA Article No.
29 CFR 1910.307. VWR 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
environments—for these locations use a VWR Scientific
Explosion-Proof Refrigerator.) However, FMS units are not
suitable for use in Class I, Group C and D environments.
This complete line includes single and 2-door upright
refrigerators and freezers, horizontal chest freezers, and
under counter refrigerators.
These units are ideal for storing cyclopropane, ethyl ether,
ethylene, acetone, alcohol, benzene, butane,
gasoline,hexane, lacquer solvent vapors, naphtha, natural
gas or propane along with many other potentially
hazardous materials.
All cabinets have heavy-gauge steel construction with a
durable exterior finish of epoxy enamel.A well insulated
cabinet and tight sealing magnetic door prevent air leaks
along with helping to lower operating costs.The interior is
made of porcelain enameled steel or ABS plastic.
VWR Scientific offers the largest selection of FMS units.
All models are delivered with 3-wire line cord and molded
plug. All 115-volt FMS models are UL listed.

Flammable Materials Storage Units
Explosion-Proof & FMS Refrigerator-Freezers Installation and Operation Manual 7
Flammable Materials Storage Refrigerators and Freezers
Models 47747-222 and 47747-224
23.63” Wide, Two-door Refrigerator/Freezer
Features:
• Overall 10.1 cu.ft.
• Four adjustable shelves
• Three door shelves
• Manual defrost
• ABS plastic interior
• White color
WARNING: For FMS and EXP units where flammable materials are stored in the cooling chamber. The
cooling chamber is considered a Class I Div1 or Class I Zone 1 hazardous location. Any monitoring
devices placed in the cooling must have an intrinsically safe rating from an appropriate certification body,
such as UL, CSA, FM etc. (this includes battery or solar powered devices). Thermocouples building
monitoring systems must be wired through an electrical barrier designed to provide isolation against
voltage and current spikes, which could cause a spark resulting in a fire or explosion. It is the end users’
responsibility to meet these requirements. VWR cannot assist with the selection of devices,
recommend, approve or design any device or monitoring circuit.
Model Refrigerator Chamber
Dimensions H x W x D
inches (cm)
Freezer Chamber
Dimensions H x W x D
inches (cm)
Total Vol.
Cu. Ft. Exterior Dimensions
H x W x D inches (cm)
47747-222 38.25”x19.75”x18.25”
(97.2 x 50.2 x 46.4 cm) 18.25”x18”x11.25” (46.3 x 45.7 x 28.6 cm) 10.1 59.75” x 23.63” x 28.6”
(151.77 x 60 x 76.2 cm)
47747-224 38.25”x19.75”x18.25”
(97.2 x 50.2 x 46.4 cm) 18.25”x18”x11.25”
(46.3 x 45.7 x 28.6 cm) 10.1 59.75” x 23.63” x 28.6”
(151.77 x 60 x 76.2 cm)
Model Electrical Characteristics
Volts/Hz, Amps Refrig. Temp. Range ° C (° F) Freezer Temp. Range ° C (° F) Net Wt. Lbs. (kg) Ship Wt. Lbs. (kg)
47747-222 115/60, 1.9 1° to 12°
(33.8° to 53.6°) -12° to -20° (10.4° to -4°) 120 (55) 150 (68)
47747-224 230/50, 1.0 1° to 12°
(33.8° to 53.6°) -12° to -20° (10.4° to -4°) 120 (55) 150 (68)
Note: Amps listed area at normal run mode.Starting amps may be higher.
VWR Scientific reserves the right to change specifications without prior notice.

Unpacking and Installation
8 Installation and Operation Manual Explosion-Proof & FMS Refrigerator-Freezers
Unpacking and Installation
Caution
DO NOT REMOVE, under any
circumstance, the grounding prongs from
the 3-prong power cord supplied 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 conduit 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 electrical
codes.If any questions pertaining to
electrical safety arises, please refer to
article 501 of the National Electrical Code.
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
countertop, 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 minimum clearance of
12” on the top, minimum of 3” at the back, and minimum 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.
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 individual outlet.

Unpacking and Installation
Explosion-Proof & FMS Refrigerator-Freezers Installation and Operation Manual 9
Be Advised
WARNING:
UNLESS UNIT IS SPECIFICALLY DESIGNED FOR
COMBUSTIBLE OR FLAMMABLE ATMOSPHERES 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.
CAUTION:
BEFORE CONNECTING THE FINAL POWER SUPPLY,
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 INSTALLATION.
CAUTION:
SOLUTIONS USED TO CLEAN COILS OR NEUTRALIZE
BACTERIA GROWTH MUST NOT BE CORROSIVE TO
METALS (ENAMEL-COATED STEEL) AND MATERIALS
USED IN THE MAINTENANCE OF THIS
EQUIPMENT—DAMAGE CAN RESULT: USE A SOFT
CLOTH AND WARM WATER TO CLEAN.

Unpacking and Installation
10 Installation and Operation Manual Explosion-Proof & FMS Refrigerator-Freezers
Figure 1: Sealing the Killark Box
How to Seal Killark® Box
Conduit with Fiber and Sealing
Compound to Help Protect
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
proceeding.
• Place a small amount of sealing compound granules,
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 consistency 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.

Unpacking and Installation
Explosion-Proof & FMS Refrigerator-Freezers Installation and Operation Manual 11
Figure 2: Horizontal Conduit, Cutaway
• 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 THE WIRING, from the top to the
bottom, completely blocking this end of the horizontal conduit.
• 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 THE WIRING, from the top to the
bottom, completely blocking this end of the horizontal conduit.

Unpacking and Installation
12 Installation and Operation Manual Explosion-Proof & FMS Refrigerator-Freezers
• 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 HOWEVER, THE
SEALING COMPOUND REQUIRES A MINIMUM OF 8 HOURS ABOVE 32ºF TO DEVELOP SUFFICIENT STRENGTH
TO WITHSTAND EXPLOSIONS.

Operation
Explosion-Proof & FMS Refrigerator-Freezers Installation and Operation Manual 13
Operation
Caution
Do not use in the presence of flammable or
combustible materials or explosive gases.
Fire or explosion could result, causing
death or severe injury.
Start-Up Procedure
Rotate the control knob clockwise to lower the
temperature 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
stabilize. Check the temperature and compare with the
dial setting.
Adjust dial further to reach the desired operating
temperature. 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,
consider 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
thermostat 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.
How to Save Energy
• Be sure to follow location suggestions as mentioned
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.

Operation
14 Installation and Operation Manual Explosion-Proof & FMS Refrigerator-Freezers
• 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.
• Keep containers covered, when possible, to reduce
moisture buildup.
• Set operating temperature no colder than necessary
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. Have a qualified electrician repair or
replace damaged cords immediately.

Troubleshooting
Explosion-Proof & FMS Refrigerator-Freezers Installation and Operation Manual 15
Troubleshooting
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.
Symptom Possible Cause of Problem
Unit not operating Make certain that the unit is connected to a grounded outlet.
Make certain that temperature control knob is ON.
Check that circuit breaker is not tripped or fuse is not blown.
Unit runs continuously Make certain that there is no heavy frost accumulation. If there is,
defrost unit.
Look at condenser to see if there is layer of dust or lint. Clean if
required with a dry brush or vacuum.
A leak around the door gasket will allow cold air to escape. This
causes unit to work harder than necessary to maintain cold
temperatures. Re-seat or replace the gasket if worn.
If you have temperature set too cold, this may cause unit to run
continuously. Check optimum running temperature. Is the ambient air
over 43ºC (109ºF), or the units located close to heat sources? If
possible, move to a different location.
An unusually high frequency of door openings and closings can
increase operating load. Unit will stabilize as these are decreased.
Noise problems This can be caused by contents of unit being set too close and
rattling against each other. Rearrange contents as needed.
Hissing or gurgling noise is caused by refrigerating fluid circulating
and is normal.
Noise can result if unit is not level on floor. Check with level.
Fan noise—normal airflow can cause this—not a problem.

Maintenance
16 Installation and Operation Manual Explosion-Proof & FMS Refrigerator-Freezers
Maintenance
Warning
Disconnect from the power supply prior to
maintenance and servicing.
Warning
Refer servicing to qualified personnel.
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 cleaning
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.

Maintenance
Explosion-Proof & FMS Refrigerator-Freezers Installation and Operation Manual 17
Order From Your VWR Sales Office
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