Cardinal Health CHH05RESA User manual

Flammable Material Storage
and Explosion Proof Laboratory
Refrigerators and Freezers
Installation and Operation
CHH05RESA
CHH05RFSA
CHH07CESA
CHH07CFSA

IMPORTANT Read this instruction manual. Failure to follow the instructions in this manual can result in
damage to the unit, injury to operating personnel and poor equipment performance.
CAUTION All internal adjustments and maintenance must be performed by qualied service personnel.
Material in this manual is for informational purposes only. The contents and the product it describes are
subject to change without notice. Cardinal Health makes no representations or warranties with respect to
this manual. In no event shall Cardinal Health be held liable for any damages, direct or incidental, arising
from or related to the use of this manual.

Table Of Contents
1. Models ........................................................................................1
2. Safety Precautions .............................................................................2
3. Intended Use ..................................................................................3
4. Unpacking and Inspection ......................................................................4
Unpacking ..........................................................................................4
Visible Loss or Damage ..............................................................................4
Concealed Loss or Damage ..........................................................................4
5. Flammable Materials Storage Refrigerators and Freezers .........................................5
Overview ...........................................................................................5
Product Specication ................................................................................6
6. Explosion-Proof Refrigerators and Freezers ......................................................7
Overview ...........................................................................................7
Product Specication ................................................................................8
7. Operating Conditions...........................................................................9
8. Installation ...................................................................................10
Leveling the Unit .................................................................................. 10
Electrical Connection .............................................................................. 10
Reversing the Front Door (CHH05RESA &CHH05RFSA) ............................................... 10
Be Advised .........................................................................................11
How to Seal Killark® Box Conduit ....................................................................11
Electric Connection Check Points................................................................... 13
9. Start-Up Procedure ............................................................................14
Restart Procedure ................................................................................. 14
How to Save Energy ............................................................................... 14
Safety Tips ........................................................................................ 14
10. Maintenance.................................................................................15
Cleaning Interior/Exterior/Door Gaskets ............................................................ 15
Cleaning the Condenser ........................................................................... 15
Manual Defrost Procedure ......................................................................... 15
Transportation and Storage ........................................................................ 16
11. Troubleshooting .............................................................................17
12. Wiring Diagram ..............................................................................18
Flammable Materials Storage Refrigerators and Freezers ............................................ 18
Explosion-Proof Refrigerators and Freezers ......................................................... 19
13. End of Life Care ..............................................................................20
14. Warranty ....................................................................................21
15. Regulatory Compliance.......................................................................22
Product Safety .................................................................................... 22
Hydrocarbon Refrigerants ......................................................................... 22
16. Contact Information .........................................................................23

1
1. Models
The table below shows the units covered in this operation and installation manual by model number.
REFRIGERATORS AND FREEZERS
Explosion Proof CHH07CESA
Flammable Material Storage CHH07CFSA
REFRIGERATORS
Explosion Proof CHH05RESA
Flammable Material Storage CHH05RFSA

2
2. Safety Precautions
It is your responsibility to understand the product's proper function and operational characteristics. This
instruction manual should be thoroughly read and all operators given adequate training before installing
and operating the unit. 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 modications will void the
Warranty.
This product is not intended, nor can it be used, as a sterile or patient connected device.
In this manual, the following symbols and conventions are used.
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.
WARNING: Avoid contact with cold freezer surfaces potential for cold burns or skin sticking to cold
surfaces.
WARNING: Units are charged with hydrocarbon refrigerant (R600a). Only qualied service
personnel should service this unit.
WARNING: Risk of re or explosion. Flammable refrigerant used. To be repaired only by trained
service personnel. Do not puncture refrigerant tubing.
WARNING: Use of this symbol involves risk of electric shock.
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.
Note: Notes alert you to pertinent facts and conditions.
DANGER RISK OF CHILD ENTRAPMENT Before you throw away your freezer:
• Take o doors.
• Leave the shelves in the place so that children may not easily climb inside.
WARNING: If the equipment is used in a manner not specied by the manufacturer, the protection
provided by the equipment may be impaired.
WARNING: Risk of re or explosion. Flammable refrigerant used. Do not use mechanical devices to
defrost the unit.
WARNING: No equipment that uses an open ame should be placed inside the refrigerator. This will
harm the unit, hamper functionality and compromise your safety.
WARNING: This product can expose you to chemicals including Nickel (Metallic) which is known to
the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov
Note: Nickel is a component in all stainless steel and some other metal components.

3
3. Intended Use
The Flammable Material Storage and Explosion Proof Refrigerators and Freezers described in this manual are
intended for storage of ammable inventory / samples. These products conform to the appropriate standards
by passing all requisite testing.
Explosion Proof Refrigerators and Freezers are intended to use in classied areas requiring Class I, Groups C
and D as dened in NFPA 70 Articles 500-501 and NFPA 45 and OSHA 29 CFR1910.307.
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 33.8°F to 53.6°F (+1°C to +12°C)
Freezers -4°F to 10.4°F (-20°C to -12°C)
These are not considered as 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 reintroduced to the body.
WARNING: Only Explosion Proof or Flammable Material Storage Refrigerator and Freezer are to be
used for the storage of ammable inventory / samples.
WARNING: Flammable Material Storage Refrigerator and Freezer are NOT designed for use in
Class I, Groups C and D environments, which require an Explosion-Proof Refrigerators and Freezers.
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.
Follow site protocols to identify materials of corrosive nature.

4
3. Intended Use
4. Unpacking and Inspection
CAUTION: DO NOT REMOVE, under any circumstance, the grounding prongs from the 3-prong
power cord supplied with all FMS Refrigerator and freezer.
CAUTION: DO NOT USE electrical extension cords that may result in voltage loss and possible
hazardous operation.
Unpacking
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.
Visible Loss or Damage
Note any external evidence of loss or damage on the freight bill, or express receipt, and have it signed by
the carrier’s agent. Failure to adequately describe such external evidence of loss or damage may result in the
carrier’s refusing to honor your damage claim. The form required to le such a claim will be supplied by the
carrier.
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.
Concealed Loss or Damage
Concealed loss or damage refers to loss or damage, which does not become apparent until the merchandise
has been unpacked and inspected. If either occur, make a written request for the carrier’s agent within 15 days
of the delivery date; then le a claim with the carrier since the damage is the carrier’s responsibility.
If you follow the above instructions carefully, we will guarantee our support of your claim to be compensated
for loss from concealed damage.
DO NOT, FOR ANY REASON RETURN THIS UNIT WITHOUT FIRST OBTAINING AUTHORIZATION.

5
5. Flammable Materials Storage Refrigerators and Freezers
Overview
Conventional Refrigerators and Freezers are not suitable for storing ammable materials. Such units have
components in their electrical and refrigeration systems that can trigger explosions of ammable air-vapor
mixtures inside the unit.
Flammable Materials Storage (FMS) Refrigerators and Freezers are designed for use in locations, which are
classied by the Authority Having Jurisdiction (AHJ) as not hazardous. Under normal operating conditions the
build up or presence of ammable vapors will not occur in the environment external to the unit (Commonly
known as “Ordinary Locations”).
FMS Refrigerators and Freezers are NOT designed for use in Class I, Groups C and D environments,
which require an Explosion-Proof Refrigerators and Freezers.
This is not an Explosion Proof Refrigerator and Freezer but it has been designed to permit safe storage of
materials producing ammable vapors. Containers should be well-stoppered or tightly closed.
FMS Refrigerator and Freezer are designed and evaluated by Underwriters Laboratories (UL) to meet the
requirements of the National Fire Protection Association Standards Nos. 45 and 70. These units have no
internal electrical components that could trigger an explosion or re of hazardous materials inside the unit.
As this unit uses R600a refrigerant. This unit is intended for use in laboratories in commercial, industrial or
institutional occupancies dened in the safety standard for Refrigeration Systems ASHRAE 15.
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.
WARNING: For Flammable Materials Storage Refrigerator and Freezer where ammable materials
are stored in the cooling chamber, the cooling chamber is considered a Class I Div 1 or Class I
Zone 1 hazardous location. Any monitoring devices placed in the cooling chamber must have an
intrinsically safe rating from an appropriate certication body, such as UL, CSA, FM etc. (this includes
battery or solar powered devices).
Thermocouples for building monitoring systems must be wired through an electrical barrier designed to
provide isolation against voltage and current spikes.
These could cause a spark resulting in re or explosion. It is your responsibility to meet these requirements.
.

6
Product Specication
MODEL CHH05RFSA - 5.5 Cu. ft. MODEL CHH07CFSA - 7.1 Cu. ft.
23.63" Wide, Under-counter Refrigerator 22" Wide, Refrigerator and Freezer
Features: Features:
• Three adjustable shelves
• Adjustable thermostat
• Magnetic door gasket
• White color
• Key lock
• One glass shelf
• Adjustable leveling legs in the front
• Refrigerator: 3 Adjustable Shelves
• Freezer: 1 Adjustable Shelf
• Manual defrost
• White color
CHH05RFSA CHH07CFSA
Refrigerator Chamber Dimensions
H x W x D inches (cm)
27.75" x 20" x 17.5"
(70.5 x 50.8 x 44.5 cm)
36.5" x 17.5" x 17"
(92.7 x 44.5 x 43.2 cm)
Freezer Chamber Dimensions
H x W x D inches (cm)
N/A 10.38" x 15.5" x 16"
(26.4 x 39.4 x 40.6 cm)
Exterior Dimensions
H x W x D inches (cm)
33.5" x 23.63" x 29"
(85 x 60 x 73.6 cm)
56.63" x 21.5" x 25.75"
(143.8 x 54.6 x 65.4 cm)
Electrical Characteristics
Volts/Hz, Amps
120/60, 0.8 115/60, 1
Refrigerator Temperature Range
°F (°C)
33.8° to 53.6°
(1° to 12°)
33.8° to 53.6°
(1° to 12°)
Freezer Temperature Range
°F (°C)
N/A -4° to 10.4°
(-20° to -12°)
Net Weight lbs. (kg) 80 (36.2) 89 (40.5)
Note: Amps listed are at normal run mode, starting amps may be higher.

7
6. Explosion-Proof Refrigerators and Freezers
Overview
The Authority Having Jurisdiction (AHJ) determines if work areas are designated as a hazardous location with
respect to the presence of ammable gases or vapors. Such locations are dened in (National Fire Protection
Agency) NFPA 70 Articles 500- 501, OSHA 29 CFR1910.307, and NFPA 45. Some of these classied areas are
expected to experience concentrations of ammable gases and/or vapors at or above their lower ammability
limits for extended periods of time.
The construction of our Explosion-Proof Refrigerator and Freezer has been evaluated by Underwriters
Laboratories (UL) and are suitable for use in classied areas requiring Class I, Groups C and D* protected
equipment. The electrical components such as thermostats, wiring, splices, relays and compressor motors on
Explosion-Proof Refrigerator and Freezer are safely housed within explosion proof enclosures and conduit.
Compressor surface temperatures have been evaluated and determined to remain below the ash point
of materials found in Class I, Groups C and D. All models have heavy-gauge, rigid, steel construction with
a durable enamel nish. Interiors have epoxy enamel or ABS plastic construction. Each unit is insulated
throughout for energy-ecient operation.
These units are designed to meet the standards established by Underwriters’ Laboratory, Inc., OSHA and
National Fire Protection Association for storage of hazardous materials.
On Explosion Proof Refrigerators and Freezers all ferrous ame paths are protected from corrosion by the use
of petroleum jelly [or petrolatum or soap-thickened mineral oils].
It is important to note that Explosion-Proof Refrigerator and Freezer must be connected to the power supply
source by rigid metal conduit with proper ttings suitable for Class I, Groups C and D* hazardous locations.In
addition, the wires inside the conduit must be sealed.
Explosion-Proof Refrigerator and Freezer require being hard wired into the building electrical system and
therefore require a qualied electrician to install as per the “local electrical requirements and NEC Standard” or
“Canadian Electrical Standard".
*The notation Class 1, Groups C and D is an accepted abbreviation for Class I, Div 1, Groups C and D; Class I
Zone 1 Group IIB.
WARNING: For Explosion-Proof Refrigerator and Freezer where ammable 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 chamber must have an intrinsically safe
rating from an appropriate certication body, such as UL, CSA, FM etc. (this includes battery or
solar powered devices).
Thermocouples for 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 re or explosion.
It is the your responsibility to meet these requirements. Thermo Scientic cannot assist with the selection of
devices, recommend, approve or design any device or monitoring circuit.
Note: If any questions pertaining to electrical safety arise, please refer to article 501 of the US National
Electrical Code.

8
Product Specication
MODEL CHH05RESA - 5.5 Cu. ft. MODEL CHH07CESA - 7.1 Cu. ft.
23.63" Wide, Under counter refrigerator 22" Wide, Two-door Refrigerator / Freezer
Features: Features:
• Three adjustable shelves
• Adjustable thermostat
• Magnetic door gasket
• White color
• Key lock
• One glass shelf
• Adjustable leveling legs in the front
• Refrigerator: 3 Adjustable Shelves
• Freezer: 1 Adjustable Shelf
• Manual defrost
• White color
CHH05RESA CHH07CESA
Refrigerator Chamber Dimensions
H x W x D inches (cm)
27.75" x 20" x 17.5"
(70.5 x 50.8 x 44.5 cm)
36.5" x 17.5" x 17"
(92.7 x 44.5 x 43.2 cm)
Freezer Chamber Dimensions
H x W x D inches (cm)
N/A 10.38" x 15.5" x 16"
(26.4 x 39.4 x 40.6 cm)
Exterior Dimensions
H x W x D inches (cm)
33.5" x 23.63" x 29"
(85 x 60 x 73.6 cm)
56.63" x 21.5" x 27.5"
(143.8 x 54.6 x 69.8 cm)
Electrical Characteristics
Volts/Hz, Amps
120/60, 0.8 115/60, 1
Refrigerator Temperature Range
°F (°C)
33.8° to 53.6°
(1° to 12°)
33.8° to 53.6°
(1° to 12°)
Freezer Temperature Range
°F (°C)
N/A -4° to 10.4°
(-20° to -12°)
Net Weight lbs. (kg) 88 (39.9) 101 (45.8)
Note: Amps listed are at normal run mode, starting amps may be higher.

9
7. Operating Conditions
The units described in this manual are classied for use as stationary equipment in a Pollution Degree 2 and
Over voltage Category II environment.
These units are designed to operate under the following environmental conditions:
• Indoor use
• Altitude up to 2,000 m (6512 feet)
• Maximum relative humidity 65%, non-condensing
• Temperatures: 59°F to 90°F (15°C to 32°C)
• Main supply voltage uctuations should not exceed by ±10% of the nominal voltage.

10
8. Installation
Selecting a Location
Choose a location for the CHH07CFSA / CHH07CESA (Refrigerator and Freezer) that provides a clearance of
12 in. at the top, 4 in. at the rear and 4 in. on each side.
Choose a location for the CHH05RFSA / CHH05RESA (Under-counter Refrigerator) that provides a clearance of
4 inches on all sides.
Appropriate electrical power must be available. Locate the refrigerator / freezer within eight feet of the power
outlet so that no extension cord is required. Attach the refrigerator / freezer to the facility’s electrical supply as
directed by the National Electrical Code.
Leveling the Unit
This refrigerator / freezer must be level in order to provide adequate condensate drainage as well as proper
door alignment and operation. The refrigerator / freezer should be in its nal operating location and set so
that it is rmly positioned on the oor.
Electrical Connection
Determine the total amount of current presently being used by other apparatus connected to the circuit that
will be used by this refrigerator. It is critical that this added current demand and other equipment on this
circuit not exceed the rating of the fuse or circuit breaker in use.
The frequency and nominal voltage requirements for the unit are specied on the data plate. Supply this unit
with an electrical source that meets these requirements only. Low line voltage is often the cause of service
complaints. With the unit running, check that the line voltage is within ±10% of that specied on
the data plate.
CAUTION: Be sure the voltage supplied to the refrigerator / freezer is equal to that specied on the
data plate.
WARNING: For personal safety, this unit must be properly grounded before use.
Units must be connected to a grounded outlet matching the name plate and / or the information furnished in
this manual. If you are not sure about the outlet, you should contact a qualied electrician for assistance.
The Unit should always be connected to a dedicated power source.
WARNING: DO NOT REMOVE, under any circumstance, the grounding prongs from the
3-prong power cord supplied with all FMS Refrigerator and Freezers.
WARNING: DO NOT USE electrical extension cords, it may result in voltage loss and possible
hazardous operation.
Reversing the Front Door (CHH05RESA &CHH05RFSA)
1. Remove bolts and plugs using a screwdriver.
2. Unscrew the bolts connecting the upper hinges to the upper platform. Remove the upper platform by rst
pulling it forward and then lifting it upwards.
3. Remove the door by unscrewing the bolts in the upper hinges.
4. Remove the buer by unscrewing the bolts on both of its sides.

11
5. Break o the part behind the buer through which the lower hinges pass using a knife or your hands.
6. Remove the lower hinge and mount it on the other side tightening its bolts.
7. Remove the hole plugs of the door handle with a knife.
8. Fit the hole plugs of the door handle to the other side.
9. Fit the buer to its place.
10. Mount the door to its place.
11. Fit the upper hinges into their places - do not tighten the bolts, but leave them loose.
12. Adjust the vertical and parallel position of the door to the line of sight, then tighten the bolts of the upper
hinges.
13. Fit the upper platform into its place.
14. Fit the bolts connecting the upper hinges and the upper platform but, do not tighten them.
15. Adjust the upper platform until it is level, then tighten the bolts in operations.
16. Fit the plugs of the upper platform.
Be Advised
WARNING: Explosion-Proof Refrigerator and Freezers do not come with line cords. They require
rigid conduit to be run directly in order to seal o the tting 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 (NFPA70).
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 nal 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 qualied
electricians should work on the electrical portion of any unit Installation and service.
CAUTION: Storage by user of any materials in the product that may cause a deterioration of the
product shall be deemed to constitute abnormal and improper usage of the product for purposes
of this warranty.
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.
How to Seal Killark® Box Conduit
To Seal Killark® Box Conduit with Fiber and Sealing Compound to Help Protect Against Explosions
(Explosion- Proof Refrigerator and Freezers Only):
The purpose of the procedure that follows is to build ber rope dams on the left and right hubs of the
horizontal conduit. The ber rope damns will surround conduit wiring that is housed inside the horizontal
conduit.

12
When both the left and right ber 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 o 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 sti 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.
Note: KILLARK® is a registered trademark of Hub bell Incorporated, Shelton, CT, USA.
Figure 1. Sealing the Killark Box
Note: Wires must be kept separated as shown in the Figure 2.
Figure 2. Horizontal Conduit, Cutaway
• Insert ber rope material down into horizontal conduit opening. Pressing down rmly, 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.
Left Hub Right Hub
Wiring

13
Figure 3. Fiber rope material in left hub
• Insert ber rope material down into horizontal conduit opening. Pressing down rmly, 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.
Figure 4. Fiber rope material in right hub
• Pour sealing compound down in between the two ber rope dams lling the remaining space. Pour slowly,
being careful not to trap air bubbles. Immediately wipe o any spilled sealing compound.
Figure 5. Adding 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 (0ºC) to develop sucient strength to withstand
explosions.
Note: Wires must be kept separated as shown in the gure before addition of the sealing compound.
Electric Connection Check Points
• Have proper connections been made at the junction box?
• Is the junction box lid fastened tightly to the junction box?
• Are all wire connections secure?
• Are the service conductor sizes adequate to carry rated load?
• Is the unit properly grounded?
• Is the unit connected to a properly fused branch circuit?

14
9. Start-Up Procedure
Thermostat is located at the back of the unit. Turn the knob clockwise towards the higher numbers for
colder temperatures. Higher settings on the knob (higher numbers) mean lower temperatures (colder) in the
refrigerator.
On the coldest settings, temperatures in some spots inside the refrigerator cabinet may drop below 32°F.
Use higher thermostat settings only when required or recommended.
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 specic 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 night time period; return temperature control to original setting
when the room thermostat is returned to its normal setting.
Follow site protocols for loading and unloading samples.
Restart Procedure
If unit is unplugged or turned o, 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.
• 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
CAUTION: 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.
WARNING: Never disconnect your unit by pulling on the power cord. Always grip the plug securely
and pull straight out from the outlet.
WARNING: Do not use a power cord that shows cracks or abrasions. Have a qualied electrician
repair or replace damaged cords immediately.
WARNING: We recommend handling samples by wearing gloves to avoid frost bite

15
10. Maintenance
Defrost the unit at regular intervals and unit should be maintained and cleaned at least once a year following
instructions below.
CAUTION: When servicing the unit, disconnect from the electrical power source.
CAUTION: Refer servicing to qualied personnel.
Follow site protocols for cleaning.
Cleaning the Unit
Before beginning cleaning unit follow these instruction listed below:
• Disconnect power cord from its outlet.
• Set the temperature control to the OFF position.
• The unit designs permit easy and rapid cleaning and should not take more than a few minutes. Remember
to wear protective gloves to prevent frost bite, especially when removing items from freezer units.
• 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 / detergent and lukewarm 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.
The cabinet interior should be cleaned frequently. Any spilled liquid should be wiped o immediately since
stains resulting from some spills could be permanent if not quickly removed. The most convenient time to
clean the interior is after defrosting.
Cleaning the 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.
These surfaces may be warm to the touch. The condenser should be cleaned before becoming clogged with
dirt / dust. Construction or other dirt causing environments may signicantly increase the required frequency.
The condenser should be cleaned at least once a year.
CAUTION: Never clean around the condensers with your ngers. Some surfaces are sharp.
Manual Defrost Procedure
Use the following procedure to defrost manually:
• Rotate the temperature control knob to the OFF setting or zero position according to the model.
• Disconnect the power cord from its outlet.
• Remove contents of the unit. If practical, wrap contents in paper and then in a heavy blanket to maintain
temperature of items, especially those removed from a freezer. Wear protective gloves to prevent from frost
bite when handling cold items.

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• 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 the contents.
• Reconnect the power cord to outlet and set temperature control to desired operating temperature.
CAUTION: Do not use any sharp instruments, blade or scraper to remove ice and frost on
refrigerator or freezer surfaces because of the very real danger of puncturing the cooling coil.
CAUTION: Do not use any electrical devices to defrost the unit.
When frost accumulates to 1/4" or more, the operating eciency of the unit will be aected.
All laboratory refrigerators feature automatic defrosting and in normal conditions no manual defrosting is
required. However, in certain conditions (e.g. when the refrigerator is very full or when any new items are
stored in the refrigerator) frost may form on the rear wall of the equipment as the compressor must run for
long periods of time. As automatic defrosting takes place while the compressor is not running, the refrigerator
may not defrost completely before the compressor restarts. In these instances, some manual defrosting may
be required.
Before manually defrosting the cabinet, make sure the power lead is disconnected from the mains. With cold
wall refrigerator, condensation may form on the interior of the cabinet and may require periodic wipe- down
with an absorbent cloth.
In high usage and / or high ambient scenarios, excessive ice may form on the inner back wall of the
refrigerator and in the worst case or sudden power cut-o event, drain pan might overow. Hence it is
recommended to defrost frequently and collect any build up ice from inside in a container and safely dispose
in the sink. If the drain pan has over owed, empty the pan and dry up the wet regions around before next
restart.
Transportation and Storage
Use all required local facility procedures and PPE while transporting and storing the product.

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11. Troubleshooting
This section is a guide to troubleshoot general operational problems.
Symptom Probable Cause Action
Unit does not run
Unit Unplugged Plug in Unit
Blown fuse or tripped circuit
breaker. Check fuse or circuit breaker at breaker box.
Temperature control knob is
turned to OFF. Turn temperature control knob to ON.
Unit runs
continuously
Frost build up on refrigeration
coils. Defrost unit
Dust or lint build-up on
condenser.
Clean the condenser with a dry brush or
vacuum.
Door gasket worn out.
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.
Temperature too low. This may cause unit to run continuously.
Check optimum running temperature.
Ambient temperature over 109ºF
(43ºC).
Is the ambient air over 109ºF (43ºC), or
the units located close to heat sources? If
possible, move to a dierent location.
Door opening frequency is high.
An unusually high frequency of door
openings and closings can increase
operating load. Unit will stabilize as these are
decreased.
Noise problems
Contents of unit set too close
and rattling against each other. Rearrange contents as needed.
Hissing or gurgling noise is
caused by refrigerating uid
circulating.
This is normal.
Unit is not level on oor. Check the level of unit.
Fan noise Airow can cause this. This is normal.