Continental Scientific | Refrigerators and Freezers | Troubleshooting guide | Continental Scientific Refrigerators and Freezers Troubleshooting guide

INSTALLATION AND OPERATIONS MANUAL
Laboratory/Pharmacy
Worktop and Undercounters
Reach-Ins & Pass-Thrus
Refrigerators & Freezers
Please fill in the following information for your NEW unit, carefully
read the instructions in this manual and file it for future reference.
MODEL NO.
SERIAL NO.
PURCHASED FROM
INSTALL DATE
1-800-523-7138
Continental Scientific
A Division of National Refrigeration
& Air Conditioning Products, Inc.
539 Dunksferry Road
Bensalem, PA 19020-5908
P 215-244-1400
F 215-244-9579
www.continentalscientific.com
TABLE OF CONTENTS Page
Receiving Your New Model.............................................................................................................. 3
Uncrating Your New Model.............................................................................................................. 3
General Information and Important Operating Facts................................................................................. 3
Serial Data Tag........................................................................................................................................................3
Model Components.................................................................................................................................................4
Installation and Location................................................................................................................. 4
Ventilation...............................................................................................................................................................4
Floor Loads.............................................................................................................................................................5
Installing Casters and Leveling...............................................................................................................................5
Installing Legs and Leveling...................................................................................................................................6 Condensate Removal (Interior Coil Models)...........................................................................................................6
Condensate Removal (Top Mount Coil Models).....................................................................................................7
Door Removal and Adjustment...............................................................................................................................7
Removal and Replacement of Hinge Mechanism....................................................................................................8
Re-Hinging Doors (Reach-Ins)...............................................................................................................................8 Removing Grill........................................................................................................................................................9
Initial Cleaning Procedure............................................................................................................... 9
Start-Up Procedure........................................................................................................................ 9
Electrical Connections.............................................................................................................................................9
GFI/GFCI Receptacles................................................................................................................................9
115 Volt, 60 Hz, 1 Phase Connection.......................................................................................................10
115/208-230 Volt, 60 Hz, 1 Phase Connection.........................................................................................10
Special Voltage Connections....................................................................................................................10
Start-Up Checklist..................................................................................................................................................10
Remote Applications..............................................................................................................................................10
Operation.................................................................................................................................. 11
Digital Thermometer and Calibration.....................................................................................................................11
Anti-Condensate Control........................................................................................................................................11 .
Refrigeration System and Adjustment...................................................................................................................12
Freezer System and Adjustment............................................................................................................................12
Defrost Operation (Forced-Air, Finned Evaporator Freezers).....................................................................12
Reach-In Refrigeration System (Ceiling-Mount Evaporator)..................................................................................13
Top-Mount Plug Box Refrigeration System (Evaporator Housing on Top of Cabinet)...........................................14
Cold Wall Defrost and Adjustment.........................................................................................................................14 .
Interior Accessories..............................................................................................................................................................15
Shelving Installation..............................................................................................................................................15
Maintenance............................................................................................................................... 16
Periodic Cleaning Procedure..................................................................................................................................16
General Preventative Maintenance..........................................................................................................................16
Care and Cleaning of Stainless Steel................................................................................................. 17
Parts and Service......................................................................................................................... 18 .
Placing a Service Call.............................................................................................................................................18
Obtaining Replacement Parts Under Warranty.......................................................................................................18
Obtaining Replacement Compressor Under Warranty............................................................................................18
Optional Accessories..................................................................................................................... 19
Chromatography Refrigerators...............................................................................................................................19
Pressure Relief Vent Port.......................................................................................................................................19
Pan Slide Assemblies.............................................................................................................................................19
Pan Slide Installation................................................................................................................................19
Wire Pan Slide Racks (Reach-In & Pass-Thru Models)............................................................................20
Interior Roll-Out Drawers.......................................................................................................................................20
Chart Recorder.......................................................................................................................................................21
Changing Chart Paper..............................................................................................................................21
Calibrating Chart Paper............................................................................................................................21
Glycol Bottle.............................................................................................................................................22
Hinged Glass Door Removal and Adjustment.........................................................................................................22
Sliding Glass Door Removal and Adjustment.........................................................................................................23
Digital Thermometer and Alarm.............................................................................................................................23
Adjusting Program Settings......................................................................................................................24
Wire Connections......................................................................................................................................24
Dip Switch Settings...................................................................................................................................24
Definitions.................................................................................................................................................24
Mounting Caster Support Plates............................................................................................................................25
Remote Set-Up and Installation Guidelines............................................................................................................26
Troubleshooting and Servicing Guide................................................................................................. 28
Wiring Diagrams.......................................................................................................................... 30
Limited Extended Protection Warranty................................................................................................ 38
OPERATIONS MANUAL
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS
RECEIVING YOUR NEW MODEL
Congratulations on your purchase of Continental Scientific
superior laboratory/pharmacy equipment! When your shipment
arrives, thoroughly examine the packaging for any punctures,
dents, or signs of rough handling. It is in your best interest
to partially remove or open the shipping container in order to
examine the contents for any missing accessories or concealed
damage which may have occurred during shipment. If the cabinet is damaged, it must be noted on the carrier’s delivery slip
or bill of lading and Freight Claim must be filed with the shipping company. FREIGHT DAMAGE IS NOT COVERED UNDER
WARRANTY.
UNCRATING YOUR NEW MODEL
The protective packaging should remain on your cabinet to
avoid dents or scratches while transporting it to the actual setup location. All shelving, accessories and legs or casters are
carefully packaged and secured inside your cabinet to prevent
damage. All doors are locked and the keys are conveniently
attached to the door handle. After moving your unit to its final
location, split the outer plastic wrap vertically, along one of
the corners of the cabinet. Remove the plastic and the protective corner guards and any accessories or boxes on the skid.
Dispose of all packaging materials properly.
Four (4) bolts secure the cabinet to the wooden skid. The bolts
are located at each end on the underside of the skid. In order to
remove these bolts, tilt the cabinet backwards and place wooden blocks at each end in order to hold it in its tilted position.
Using a ¾” socket or open end wrench, remove the bolts and
carefully slide the cabinet off of the skid. If caster support plates
are to be installed, save the bolts and washers (see “Mounting
Caster Support Plates” under “Optional Accessories”). After
skid removal, the cabinet should never be moved without dollies
or rollers to avoid damage to the cabinet bottom or floor.
IMPORTANT NOTE: Do not under any circumstances, lay
your new model on its front or sides. For a brief period
of time, you may lay the cabinet on its back, but only
when it’s properly blocked so as not to crush the back
or end panels and also to allow provision for your hands,
in order to set it in its upright position without damaging
the cabinet. Do not plug in and operate model for at
least three (3) hours after cabinet is set upright from
being on its back as this can damage the compressor.
GENERAL INFORMATION AND
IMPORTANT OPERATING FACTS
This manual has been compiled to aid in the installation, operation and maintenance of your new equipment. Please take the
time to read it and familiarize yourself with your equipment and
its operation, to enjoy optimum performance.
Continental Scientific offers a variety of accessories for your
model (see “Optional Accessories” section towards the back of
this manual or contact your dealer for more information).
SERIAL DATA TAG
A serialized data tag is permanently attached to the inside righthand wall of your unit. (see Figure 1). In addition to identifying
the specific product, this label provides important information
regarding electrical requirements and refrigeration charge, as
well as agency listings and factory contacts.
FIGURE 1: Data Tag
IMPORTANT NOTE: The model and serial number should
be noted on the front cover of this manual, in the spaces
provided. If parts or service are ever needed for your unit,
this information will be required to verify warranty status
and to properly identify any parts that may be needed.
OPERATIONS MANUAL
3
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS All cabinets must be given sufficient time to reach normal operating temperature before placing any product inside cabinet. For
refrigerators, approximately 2 hours of operation is required to
lower the cabinet to 4°C. Freezers require approximately 4 hours
of operation to lower the cabinet temperature to -20°C (see
“Operation” section for further information).
Prior to factory shipping, all products are performance-run
tested for a minimum of 12 hours providing a highly sophisticated temperature recording exclusive to each individual
cabinet. This recording is supplied within this manual packet. A
final evaluation, including analysis of cabinet performance, leak
check, vibration, noise level and visual examination is made by
a qualified quality control team to assure a superior product.
The carrier signs to this effect when they accept the product for
shipping. To insure the maximum in safety and sanitation, all
models are listed under the applicable standards of Underwriters
Laboratories and the National Sanitation Foundation.
tors and freezers have an insulated housing located on top of the
cabinet, that contains the evaporator coil, out of the refrigerated
storage area (see Figure 2A).

FIGURE 2A: Pass-Thru Refrigerator or Freezer














MODEL
COMPONENTS

FIGURE 2: Reach-In Refrigerator or Freezer






















INSTALLATION AND LOCATION

Before moving the cabinet to its final point of installation, measure all doorways or passages to assure clearance. If additional
clearance is needed, you can remove the cabinet doors and grill
(see “Door Removal and Adjustment” and “Grill Removal”).

VENTILATION








Reach-In refrigerators and freezers have an internal evaporator
coil located behind the fan panel on the inside ceiling of the
refrigerated compartment (see Figure 2). Pass-Thru refrigera-
4
The final location site of your air cooled refrigerator or freezer
must provide a large quantity of cool, clean air. All refrigeration
systems operate most efficiently and trouble-free with cool, dry
air circulation. Avoid locations near heat and moisture generating equipment or in direct sunlight (where temperatures can
exceed 100°F). Do not select a location in an unheated room or
area where temperatures may drop below 55°F. Air supply to the
condensing unit is equally important. Restricting the air places
an excessive heat load on the condensing unit and adversely
affects its operation.
OPERATIONS MANUAL
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS
For optimum performance, all models should be installed on
casters or legs (see “Installing Casters” or Installing Legs”)
with a minimum 12” above the grill and 3” on each side and
back of cabinet (see Figure 3). This spacing will provide sufficient room for proper air circulation and clearance to access
components for cleaning and maintenance. If any of the these
conditions can not be met, the installer should provide special
venting or air ducts.
IMPORTANT NOTE: To assure maximum operating
efficiency, your new cabinet should be located where an
unrestricted air supply can circulate above and behind
the cabinet. Do not at any time obstruct the grill area in
the front of the cabinet in any way, and never place or
store anything on top of the cabinet machine compart
ment. These rules are essential for maximum cooling
capacity and long life of refrigeration parts.
FIGURE 3: Minimum Clearance
(Typical Reach-In Model Shown)
FLOOR LOADS
The floor at the final location site must be level, free of vibration
and strong enough to support the total combined weights of
your new model plus the maximum product load which might
be placed into it. Keep in mind that all the weight is concentrated
at the caster or leg locations. To estimate the possible product
weight, assume that each cubic foot of storage space weighs
approximately 35 pounds. Multiply 35 pounds by the amount of
cubic feet in the cabinet to obtain the product load weight.
For example, a 20 cubic foot refrigerator can hold approximately
700 pounds of product (35 x 20). Assuming the cabinet itself
weighs 300 pounds, the total combined weight of cabinet and
product is approximately 1000 pounds. Therefore, the floor in
this example must be able to support up to 1000 pounds.
INSTALLING CASTERS AND LEVELING
If your new unit is supplied with swivel casters, they will be
packed in the accessory box that came with your cabinet.
Casters should be installed only when the cabinet is close to its
final installation site. To install casters on your new model, place
wooden blocks along the back, at each end. Tilt the cabinet back,
using the wood blocks to help hold the cabinet in its tilted position. Locate the large threaded holes on the bottom of the cabinet and screw the threaded caster studs into the mounting holes,
closest to the front of the unit. Repeat this procedure by tilting
the cabinet in the opposite direction and installing the remaining casters. Make sure the casters are tightened extremely well
(see Figure 4 & 4A). If the casters are not installed tightly, the
cabinet will be unstable and may sway or rock, which can damage the cabinet.
If the height of a caster needs to be raised, shims must be
installed under the casters which need leveling. Extra large
washers, available at most hardware or furniture stores, can
be used to shim casters, or contact the factory for caster
shims. For maximum stability under extreme conditions, caster
plate assemblies are available from the factory (see “Optional
Accessories” section of this manual).
Do not attempt to level casters by unscrewing them
from the cabinet and leaving them loose, as this will
cause damage to the cabinet and leg hole threads,
voiding all warranties.
OPERATIONS MANUAL
5
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS To assure your cabinet is level, all legs are equipped with bullettype leveling bolts. These bolts can be turned by hand or by
wrench, clockwise or counterclockwise to level the cabinet.
FIGURE 4: Installing Casters
CASTER INSTALLATION
FIGURE 5: Leg Installation
LEG INSTALLATION
OPTIONAL
CASTER SHIM
(CM1-2476)
THREADED
END
LEG
CASTER
BLOCKS
A
TURN FOOT CLOCKWISE
TO REDUCE HEIGHT, OR
COUNTERCLOCKWISE
TO INCREASE HEIGHT.
BLOCKS
FIGURE 4A: Casters Must Be Tight to Cabinet Bottom
CONDENSATE REMOVAL (Interior Coil Models)
No floor drains or plumbing connections are required since all
models use an automatic condensate water evaporating system.
Reach-In models feature an evaporator housing, located on the
inside ceiling of the refrigerated storage area (see Figure 2) and
an electric condensate vaporizer pan with a mounting bracket
packed in the accessory carton.
INSTALLING LEGS AND LEVELING
If your new unit is supplied with adjustable legs, they will be
packed in the accessory carton in the cabinet. Your cabinet will
have either four (4) or (6) threaded mounting holes on the bottom of the cabinet (see Figure 5). In order to install the legs,
carefully tip the cabinet back, adding four (4) 2” wood blocks
underneath, and simply screw the threaded leg studs into the
case bottom front leg holes. Repeat this procedure by tilting
the cabinet in the opposite direction and install the remaining
legs. Make sure the legs are tightened extremely well or the
entire model will sway or rock with each opening or closing of
the doors, possibly causing damage to the case bottom. This
procedure should be performed close to the final installation
site and allow access to the rear of the cabinet.
6
OPERATIONS MANUAL
To install the vaporizer, remove the pan, power cord, cord
clamp and screw from the carton (see Figure 6). Connect the
cord to the vaporizer as shown. Route the cord around the
outside of the pan and through the clamp as illustrated. Secure
the cord and clip to the pan by fastening the mounting screw
into the threaded hole on the side of the vaporizer. Remove the
(2) mounting screws from the back of the cabinet. Position
the bracket as shown and place the vaporizer in the bracket,
making sure the power cord is routed as illustrated. Attach the
bracket to the cabinet with the screws. Using a sharp knife or
scissors, cut the drain tube so the end is about 2” below the
bottom of the cabinet. Place the end of the drain tube in the pan,
making sure the tube is not blocked, kinked, or sitting on the
bottom of the vaporizer pan. Check that the water level switch
is operating correctly by lightly pressing down on the top of the
vaporizer, at the end where the cord is attached. You will hear
a “click” as pressure is applied and another “click” when pressure is removed. If you do not hear the switch “click”, ensure
the vaporizer is seated in the bracket correctly and the cord is
routed correctly and secured in the clamp. Plug the power cord
into the receptacle labeled “VAPORIZER” on top of the cabinet.
04/29/10
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS
REACH-IN/ROLL-IN DOOR COMPONENTS
ELECTRIC VAPORIZER WITH WATER LEVEL SWITCH
REACH-IN CABINET
FIGURE 6: Electric Condensate Vaporizer
HALF DOOR SHOWN
(COMPONENTS TYPICAL)
FIGURE 7: Reach-In Door Components
HANDLE
GASKET
SCREW
BACK OF
CABINET
SCREW COVER
POWER
CORD
DRAIN
LINE
LOCK
KEEPER
HINGE
COVER
KEEPER
BASE
SCREW
CLAMP
HINGE
PIN
TONGUE
TUMBLER
CORD
CONNECTION
WATER LEVEL
SWITCH
LOCK HOUSING
G
MOUNTING
BRACKET
SCREWS
IMPORTANT: It is extremely important that the water
level switch operates correctly, that the vaporizer is
plugged into the receptacle labeled “VAPORIZER” and
the compressor is securely plugged into the receptacle
labeled “CONDENSING UNIT”. Improper installation may
cause your cabinet or vaporizer to operate “erratically.”
This can result in water overflowing the pan and onto
the floor.
CONDENSATE REMOVAL(Top Mount Coil Models)
Pass-Thrus feature an insulated evaporator housing, located
on the top of the cabinet, out of the food zone (see Figure 2A).
These models utilize a unique self-contained hot air evaporating system to automatically eliminate condensate water. No
floor drains or plumbing connections are required and the
system is completely self-contained, so no further assembly
or maintenance is required. In some adverse conditions such
as high ambient temperature, high humidity, extremely heavy
usage, frequent loading for prolonged periods of time, or heavy
pan loading, the amount of condensate water generated could
overflow the pan. If this occurs, the plastic drain tube from the
cabinet can be diverted directly to a floor drain, bypassing the
condensate pan. Alternatively, an optional electric condensate
vaporizer may be purchased as an accessory. An electric condensate vaporizer is also supplied with all remote reach-in and
pass-thru models. To install the optional condensate vaporizer,
follow the steps for “Interior Coil Models” in the previous
section.
MOUNTING
SCREW
ADJUSTMENT
PLATE
DOOR
DOOR REMOVAL AND ADJUSTMENT
During installation, it may become necessary to remove the
cabinet doors to facilitate passage through narrow doorways or
hallways. To remove a door, carefully pry off all hinge covers
using a sharp tool or knife (see Figure 7). Swing the door to
the open-door position (90°) and carefully lift the door upward,
so the hinge pin (attached to the door) clears the hinge body
(mounted to the cabinet). If it is necessary to remove the hinge
bodies from the cabinet face, use caution when loosening the
top hinge bodies, as they cover the light switch plunger. To reinstall the door, reverse the above procedure. (For glass doors,
see “Optional Accessories”).
All doors are aligned at the factory, however vibration during
transit may cause doors to shift and adjustment may be necessary. If the door(s) require realignment, carefully pry off all hinge
covers (see Figure 7A) using a sharp putty knife or flat-blade
screwdriver. Loosen the screws securing the hinge bodies to the
face of the cabinet and slide the door into alignment. Hold the
door firmly in place and tighten all screws securely.
If the door gasket(s) do not seal properly to the cabinet face
and there are gaps between the gasket and the face on the hinge
edge, adjust the door by removing the hinge covers (see Figure
8A) and loosening the adjustment screws securing the hinge pin
to the door. Push the face of the door towards the face of the
cabinet, so the gasket firmly contacts the cabinet. If the door is
pressed too tight against the cabinet, the gasket will pinch along
the hinge side and the door will not close and seal properly. Hold
the door firmly in place and tighten all screws securely. Open
and close the door several times to check that the gasket seals
OPERATIONS MANUAL
7
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS properly all the way around the door. Re-adjust if necessary and
make sure all screws are tight. Replace all hinge covers.
HINGE ADJUSTMENT
REACH-IN/ROLL-IN
FIGURE 7A: Reach-In Hinge
Adjustment
(LEFT-HAND DOOR, TOP HINGE SHOWN)
FRONT OF
LH DOOR
ADJUSTMENT
SCREWS
ADJUSTMENT
PLATE
HINGE
PIN
HINGE
COVER
THREADED HOLE
(IN CABINET FACE)
SCREWS
LIGHT SWITCH
REVERSIBLE
CAM
(TOP HINGE ONLY)
SWITCH
ACTUATOR
HINGE
BODY
REMOVAL AND REPLACEMENT
OF HINGE MECHANISM
Before attempting any work on your refrigerator or freezer, it is
strongly recommended that all contents be removed and stored
in a walk-in or other refrigerated space. Disconnect power by
unplugging the cabinet, or switching
DETAILoff
C circuit breaker. The
SCALE the
1 : 1.5
following tools are needed to remove
hinge: straight-blade
screwdriver and Phillips screwdriver with large (#3) tip.
To remove a hinge, open the door approximately 90° and lift it
off the hinge bodies. Remove the hinge pin and adjustment plate
from the door (see Figure 8A) by loosening the adjustment
screws. Remove the hinge body from the face of the cabinet
by loosening the (3) flat-head machine screws. To remove the
lock keeper from the cabinet, remove the 2 screws on the inside
edge of the keeper (see Figure 8A) and slide it off the base. If
the white, nylon cam needs to be removed from the hinge body,
a straight blade screwdriver may be used to carefully pry the
cam out of the body. Be careful not to damage the cam, as the
nylon material is soft. Reverse the cam by rotating it 180° and
pressing it firmly back in place.
8
RE-HINGING DOORS
Single section, solid long door models are rehingeable in the
field, without the need to modify the cabinet. A scraper or flatblade screwdriver, a Phillips screwdriver and wire crimpers
will be needed. Before attempting to rehinge your unit, unload
all contents and store in walk-in or other refrigerated space.
Disconnect power to the cabinet.
Open the door approximately 90° and lift it off the hinges.
Remove the hinge pin assemblies from the door (see Figure
8A). Reverse each pin by rotating it 180° and reattaching it to the
door. Remove the hinge bodies and lock keeper(s) from the front
of the cabinet. Remove the white, nylon cam from the hinge
body. (A straight blade screwdriver may be used to carefully
pry the cam out of the body, without damaging it.) Reverse the
cam by rotating it 180° and pressing it firmly back in. Remove
the light switch from the front of the cabinet and pull the switch
out of the hole.
Remove the screws and plug button from the face of the cabinet, on the opposite side hinge locations. The wires for the light
switch will be coiled up in the insulation, behind the plug button.
Carefully pull the wires out and install female connectors for the
light switch. Remove the old light switch from behind the top
hinge and remove the wire connectors.
Cap each lead on the brown lamp cord separately, push the
wires into the insulation and insert the plug button into the hole.
Remove the cover from the control box, on top of the cabinet.
There will be a black lamp cord, with a tag identifying it as the
light switch wire. Install (2) female wire connectors on the black
lamp cord. There will be (2) brown lamp cord leads on the terminal block. Disconnect them and replace with the wires from
the black lamp cord. Cut off the old leads on the brown ripcord
and secure them out of the way, so they will not contact any live
wiring. Check that all wires are properly connected and secured.
Replace the control box cover. Remount the hinges and actuator
button for the switch to the face of the cabinet. Remount lock
keeper and door. Reconnect power to the cabinet.
OPERATIONS MANUAL
NOTE: All wiring and connections should only be made by
a qualified electrician.
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS
REMOVING GRILL
To remove the grill, loosen, but do not remove, the (4) mounting screws located on the back side of the grill at the ends.
Simply lift grill up off of its mounting screws and out. To replace
the grill, line up the grill mounting screws with the keyhole slots
located on the cabinet body, push in and down on the grill.
IMPORTANT NOTE: The wiring to the anti-condensate
switch and the thin copper tubing or cable for the thermometer are provided with leads long enough to allow
the grill to be laid across the top of the cabinet after it
has been removed. Take care not to damage the wires or
copper tubing when handling the grill.
If you need to completely remove the grill from the cabinet, disconnect the power supply to the cabinet. Remove the wires on
the back of the anti-condensate switch on the grill. Locate the
thermometer sensing bulb and cover, located inside the cabinet.
On Reach-In models, the thermometer bulb cover is under a
small cover channel on the interior top left corner towards the
front of the cabinet. On Pass-Thru models, the thermometer
bulb is located on the interior top, under the air duct. Remove
the cover, carefully grasp the bulb and push it back through
the cabinet hole. The thermometer bulb and grill can now be
removed from the cabinet. When reinstalling the thermometer
bulb, be sure to replace the sealant putty around the hole into
the insulation. Reattach the leads for the anti-condensate heater
switch and reconnect the cabinet’s power supply.
INITIAL CLEANING PROCEDURE
Prior to start-up and before placing any product inside of your
new model, the interior of the cabinet should be thoroughly
cleaned. Washing with a mild soap and warm water solution
is recommended for cleaning the aluminum and stainless steel
surfaces of your cabinet. This should be followed by cleaning
with a baking soda solution (three (3) tablespoons of baking
soda to each quart of warm water). Rinse thoroughly with clear
water and dry with a clean, soft cloth.
IMPORTANT NOTE: Never use harsh detergents, cleaners, scouring powders or chemicals when cleaning your
model. Failure to dry the interior surfaces after cleaning
may result in a streaking or staining of the metal.
START-UP PROCEDURE
ELECTRICAL CONNECTIONS
To insure proper operation, your new model must be connected
to an individual circuit that can supply the full voltage as stated
on the cabinet serial data plate. For correct voltage, power draw,
and wire accommodations, check the data on the serial data
plate located on the inner right wall of your new model. Verify
that this information exactly matches the electrical characteristics at the installation location. An electrical wiring diagram,
located on the inside compressor compartment rear, next to
the electrical console box, should also be consulted during
connection. For reference, a copy of each electrical wiring diagram is located towards the back of this manual (see “Wiring
Diagrams” section).
Refrigeration compressors are designed to operate within
+/-10% of the rated voltage indicated on the cabinet serial
plate. Excessively high or low supply power can burnout the
compressor. This can be easily detected and will void the factory warranty. Full voltage at the correct rating, on a separate,
designated circuit, not affected by the operation of other electrical appliances, must be available to the refrigeration unit at all
times. Extension cords should never be used on commercial
equipment, as they can overheat and/or result in low voltage.
GFI/GFCI RECEPTACLES
Building codes in some areas may require certain 115 volt
receptacles to be protected by a Ground-Fault Circuit Interrupter
(GFCI or GFI). These devices are not recommended for most
commercial refrigerators and freezers, since nuisance trips
can occur (typically due to moisture) causing temporary loss
of power. This may result in high storage temperatures and
potentially unsafe product. If you connect your equipment to a
GFCI protected receptacle, a properly sized, commercial grade
circuit breaker should be used on a separate, power supply.
Alternatively, a qualified electrician may be able to hard wire
your equipment, eliminating the need for a GFCI device. Contact
Continental’s Service Department before making any modifications to your cabinet, to avoid loss of warranty.
GFCI devices are not recommended. Product loss and/or problems resulting from nuisance trips or connection to a defective
or improper power supply, are not covered under warranty.
Unauthorized modifications to your equipment or power cord
can cause an electrical hazard and will void factory warranty.
Complete cleaning procedures and precautions are listed in the
(“Periodic Cleaning Procedure” under “Maintenance”).
OPERATIONS MANUAL
9
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS 115 VOLT, 60 HZ, 1 PHASE CONNECTION
All 115 volt models are provided with a factory
installed, UL 15-amp power cord and NEMA
5-15P plug, or a 20-amp cord with NEMA 5-20P
plug. Your unit must be plugged into a compatible, grounded receptacle that can supply the full
voltage and amperage stated on the serial plate
(see Figure 1).
START-UP CHECKLIST
After your unit has been installed and electrically connected in
accordance with this manual, please take time to check the following before loading product, to assure trouble-free operation:
q
q
q
IMPORTANT NOTE: A SEPARATE, ISOLATED, PROPERLY
SIZED POWER SUPPLY MUST BE PROVIDED. GFCI
DEVICES AND/OR EXTENSION CORDS SHOULD NOT
BE USED. PRODUCT LOSS, AS WELL AS PROBLEMS
RESULTING FROM NUISANCE TRIPS OR HIGH/LOW
VOLTAGE, ARE NOT COVERED UNDER WARRANTY.
q
q
q
q
CAUTION: IF UNIT IS UNPLUGGED OR DISCONNECTED
FOR ANY REASON, ALLOW 5-6 MINUTES BEFORE
TURNING THE UNIT BACK ON TO ALLOW THE SYSTEM
TO EQUALIZE. DISREGARDING THIS PROCEDURE
COULD CAUSE AN OVERLOAD AND PREVENT THE UNIT
FROM OPERATING.
115/208-230 VOLT, 60 HZ, 1 PHASE CONNECTION
All 115/208-230 volt models are provided with three (3) supply wires, which exit the electrical box located in the machine
compartment rear, next to the compressor. The cabinet circuitry
is 115 volts and the condensing unit operates on 208-230 volts.
A permanently connected, 3-wire (plus ground) power supply is
required, consisting of (2) hot conductors and (1) neutral wire,
plus (1) ground wire. The supply leads must be connected to
the appropriate leads from the cabinet and the supply ground
wire must be attached to the electrical box with a ground lug
to provide proper grounding of the metal cabinet and chassis.
All wiring and connections should only be made by a qualified
electrician and must conform to all local electrical codes.
SPECIAL VOLTAGE CONNECTIONS
When models are ordered from the factory with special voltages,
connections should be made as required on the electrical wiring
diagram provided next to the electrical control box.
10
q
q
q
q
q
Sufficient clearance and ventilation provided around
cabinet (see “Ventilation”)
Unit connected to separate power supply at correct
voltage (see “Electrical Connections”)
Cabinet is level and casters/legs are tight
(see “Installation and Location”)
Doors close and seal properly
(see “Door Removal and Adjustment”)
Cabinet operating at correct temperature
(see “System and Adjustment”)
Thermometer properly calibrated
(see “Thermometer and Calibration”)
Condensate vaporizer installed correctly
(see “Condensate Removal”)
All refrigeration lines free of kinks and excess vibration
(see “Refrigeration System”)
Condenser and evaporator fans rotate freely
(see “Refrigeration System”)
Freezers only: defrost time clock set correctly
(see “Freezer System and Adjustment”)
All pilaster clips installed securely and shelves are level
(see “Shelving Installation”)
All packing materials discarded and cabinet properly
cleaned (see “Periodic Cleaning”)
09/03/10
The system should run smooth and quietly in accordance
with generally accepted commercial standards. If any unusual
noises are heard, turn the unit off immediately and check for any
obstructions of the condenser or evaporator fans. Fan motors,
fan blades, or fan housings can be jarred out of position through
rough handling in transit or during installation.
REMOTE APPLICATIONS
All products are available for purchase as remote models, in
which case the condensing unit is not supplied with the cabinet.
All remote models come standard on 6” legs, with an expansion
valve in the evaporator housing, as well as stubs for the liquid
and suction refrigeration line connections. Installation of the
refrigeration accessories, condensing unit, and electrical hookup should be performed by qualified refrigeration personnel of
a competent refrigeration company only (see “Remote Set-Up
and Installation Guidelines” under “Optional Accessories”).
OPERATIONS MANUAL
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS
OPERATION
All cabinets must be given sufficient time to reach normal operating temperature before placing any product inside cabinet.
Refrigerators are designed to maintain ideal cabinet temperature
of 3° to 4°C (38° to 40°F). Approximately 2 hours of operation
is required to reach this temperature. Freezers are designed
to maintain ideal cabinet temperature of -20° to -18°C (-4° to
0°F) and Low Temp Freezers -28° to -26°C (-19° to -15°F).
Approximately 4 hours of operation are required to reach this
temperature.
DIGITAL THERMOMETER AND CALIBRATION
Your NSF-approved thermometer has a remote sensing bulb,
located inside the cabinet on left-hand wall. The easy to read
24-Volt LED display is calibrated at the factory to accurately
show temperature at the center of the refrigerated compartment.
While in transit, your cabinet will be subjected to more jarring
and vibration than at any other time, and the thermometer may
require adjustment at start-up.
Refrigerators are designed to maintain 3° to 4°C (38° to 40°F
); Freezers -20° to -18°C (-4° to 0°F) and Low Temp Freezers
-28° to -26°C (-19° to -15°F). During periods of heavy use,
when doors are opened repeatedly or remain open for an
extended period, or if warm product is loaded into the cabinet,
the temperature displayed may temporarily exceed the “normal”
range. This is common, as warm air outside the cabinet mixes
with cold air inside. If your thermometer continues to display
temperature above “normal” range, close the doors, make sure
they seal tight and keep them closed for at least 30 minutes. If
a high temperature is still displayed, check the thermometer by
placing a pre-calibrated temperature sensing device in the center
of the refrigerated compartment and keep the doors closed for
at least 15 minutes. The thermometer display should read the
same temperature as the sensing device, within +/-1°C (+/-2°F).
If it does not, follow the instructions below to calibrate the
thermometer display, by adjusting the offset value as required.
To calibrate, press on the right center of the front display twice
(see photo). After the first press, “CAL” will appear (unit is in
Calibration mode). After the second press, the temperature offset value (-30 to 30) will appear.
Press here to decrease temp.
Press here for
calibration mode
Press here to decrease temp.
Once you see this, press on the front lower left to decrease
temperature displayed, or on the upper left section to increase
temperature displayed. After adjusting the offset, press the right
center of the front display again to exit calibration mode. Wait 10
to 15 seconds for the cabinet temperature to appear and recheck
the display calibration.
For example, if sensing device in the cabinet reads 2° and thermometer displays 5°, press on the front right of the display twice
to show the current offset value. Then press the lower left of the
display three times to decrease offset by 3°. (If the original offset
value displayed was “0”, then “-3” will appear.)
NOTE: The buttons need to be pressed without delay
between actions. Contact the factory with any questions.
ANTI-CONDENSATE CONTROL
All Continental upright models feature an anti-condensate door
heater switch, located on the front grill (see Figure 2 & 2A). To
save energy, move the switch to the OFF position to deenergize
the heaters around the perimeter of the cabinet door openings.
If you ever notice moisture accumulating on the face of your
cabinet, move the switch to the ON position to energize the
heaters. This will warm the face of the cabinet, eliminating any
condensation that may accumulate.
Refrigerators and freezers built after January, 2010 have an
energy saving thermal limit switch, mounted in the control
box (see Figure 9 & 9A). This device automatically monitors
ambient conditions and turns the anti-condensate heaters off
whenever they are typically not required. The switch automatically turns the heaters back on when the temperature rises to a
level when the additional heat is normally needed to eliminate
condensation.
OPERATIONS MANUAL
11
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS REFRIGERATION SYSTEM AND ADJUSTMENT
All self-contained refrigerators are designed and factory set to
maintain an average cabinet temperature of 3° to 4°C (38° to
40°F). The temperature control is accessible from the top of
the electrical console box located on the cabinet top behind the
front grill (see Figure 9 & 9A). If an adjustment is necessary to
maintain the above temperature range only, place a screwdriver
into the thermostat slot and turn clockwise for a colder cabinet
temperature or counterclockwise for a warmer cabinet temperature. Further adjustments out of the factory design temperature
range must be made by a qualified refrigeration mechanic only.
IMPORTANT NOTE: All refrigerators are designed with an
automatic, “off-cycle” defrost system which means that
defrosting occurs automatically when the compressor
is not operating during an off-cycle. Do not set the thermostat too cold where the cabinet temperature will fall
below 2°C because the evaporator will become blocked
by ice since the compressor off-cycle will be considerably
shortened. This will result in loss of product stored within
the cabinet and require service to defrost the evaporator
and re-adjust the thermostat.
FREEZER SYSTEM AND ADJUSTMENT
All self-contained and low-temperature freezers are factory set
to maintain an average cabinet temperature of -20° to -18°C (-4°
to 0°F) and Low Temp Freezers -28° to -26°C (-19° to -15°F).
These products are designed to hold pre-frozen bulk product
and although they are capable of freezing small quantities of
non-frozen product, they are not to be used as fast or blast
freezers. DO NOT ATTEMPT TO FREEZE BULK QUANTITIES OF
PRODUCT.
The temperature control is accessible from the top of the electrical console box located on the cabinet top behind the front
grill (see Figure 5). If an adjustment is necessary to maintain
the above temperature range only on standard freezers, place
a screwdriver into the thermostat slot and turn clockwise for a
colder cabinet temperature or counterclockwise for a warmer
cabinet temperature. On low-temperature freezers, place a
screwdriver into the left thermostat adjustment screw (do not
turn the right differential adjustment screw) and turn clockwise for a colder cabinet temperature or counterclockwise for
a warmer cabinet temperature. Further adjustments out of the
factory design temperature range must be made by a qualified
refrigeration mechanic only.
12
AUTOMATIC DEFROST OPERATION
Forced-Air, Finned Evaporator Freezers
All freezer (except cold-wall models) are equipped with an
automatic, electric defrost system, consisting of evaporator
coil defrost and drain pan heater(s), a defrost time clock and
temperature limit/fan delay switch. The system is time initiated
by the defrost clock and temperature terminated by an automatic limit switch. During each defrost period, the condensing
unit and evaporator fans go off, while the defrost heater(s) are
energized. After termination of a defrost cycle, the heaters go off
and the condensing unit turns on. The evaporator fans remain
off (for about 20 minutes)until the coil is cools down to a preset temperature (typically 32°F). This defrost drip time, which
allows any remaining water to clear off the evaporator coil, also
ensures that only cold air is circulated throughout the storage
compartment.
After your freezer has been properly installed and electrically
connected, the defrost clock should be set for the correct time of
day and desired defrost start time. For optimum efficiency, one
defrost period per day is sufficient for most applications, with a
fail-safe cut-off time of 20 minutes.
The time clock is located in the electrical control box, which has
a window that provides access to the timer dial. The scale on
the inner “120 MINUTE DIAL” indicates the maximum time in
minutes for the duration of each defrost period. The scale on the
outer “24 HOUR DIAL” represents the actual time of day.
To set the clock for the correct time, turn the knob at the center
of the dial counterclockwise until the current time of day, as
indicated by the scale on the outer dial, aligns with the arrow on
the “CURRENT TIME INDICATOR” in the upper left corner.
NOTE: If there is ever a loss of power to your freezer,
the clock must be reset for the correct time after power
is restored, to maintain the same time of day for defrost.
To set the start time for the daily defrost period, simply unscrew
the defrost pin located around the outer dial and screw it into
the threaded hole on the dial face at the desired time. Spare
pins can be placed in the storage slot located to the right side
of the dial. In some extreme applications, where there is very
heavy usage, excessively high humidity and/or constant door
openings, additional defrost period(s) may be desired to ensure
your evaporator remains free of any frost accumulation. To add
a defrost period, simply remove a spare pin from the storage
slot and screw it into the threaded hole at the desired time on
the dial. A maximum of 3 defrost periods a day, with 8-hour
intervals between defrost periods, is acceptable.
OPERATIONS MANUAL
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS
REACH-IN REFRIGERATION SYSTEM
Ceiling-Mount Evaporator
The low-profile evaporator system is comprised of a generous sized, evenly matched evaporator and air circulating fans
contained within an easily accessible, low silhouette, interior
ceiling mounted housing (see Figure 8). A control box, located
on top of the cabinet, contains the temperature control, thermal
limit switch, defrost time clock (for freezers) and other electrical
components.
All reach-in refrigerators and freezers built after June, 2009
have a unique, modular refrigeration system. The complete, fully
charged refrigeration unit can be easily removed from the cabinet for locations with restricted access for installation, servicing,
conversion from a refrigerator to freezer (or vice versa) or other
needs. Contact the service department for more information.
VALUE LINE COIL HOUSING PARTS
FIGURE 8: Ceiling-Mount Evaporator Refrigeration System
NOTE: Contact factory before making any modifications
to the settings. Improper adjustments can cause problems with your unit, including loss of product and evaporator freeze ups, which are not covered under warranty.
TEMPERATURE
CONTROL
DEFROST
TIMER
CONDENSER
COMPRESSOR
(FREEZER ONLY)
A
IMPORTANT NOTE: All freezers have a unique, energy
saving defrost cycle as described above. Settings should
only be changed as noted, to minimize electrical consumption and provide the most efficient heating cycle.
This fail-safe defrost duration time is factory set and
should not require any further adjustment. As explained,
after defrost the automatic fan delay prevents evaporator fans from operating until the coil has reached a
preset temperature minimizing warm air circulation in the
cabinet. During start-up and after each defrost cycle, the
fans will not turn on immediately.
THERMAL LIMIT SWITCH
MODULAR
PLUG
CONTROL
BOX
EVAPORATOR
COIL
FAN MOTOR
ASSEMBLY
DEFROST
HEATER
HOUSING
END
FAN GUARD
(FREEZER ONLY)
COIL COVER
/ DRAIN PAN
DETAIL A
SCALE 1 : 8
OPERATIONS MANUAL
13
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS TOP-MOUNT PLUG BOX REFRIGERATION SYSTEM
Evaporator Housing on Top of Cabinet
The plug-type evaporator system is a unique system in which
the evaporator coil and air circulating fans are contained within
a concealed plug-type insulated housing, readily accessible on
the top of the cabinet and separate from the food storage zone
(see Figure 8A). The entire plug system is fully charged with
refrigerant and mounted on a steel rail type base which can be
easily removed from the cabinet for locations with restricted
access for installations, or if a field conversion (refrigerator to
freezer or vice versa) is desired. Before attempting to remove
plug assembly, consult
factory.
REFRIGERATION
SYSTEM
DESIGNER LINE
FIGURE 8A: Top-Mount Evaporator Housing Refrig. System
LID SCREWS
POWER CORD
COMPRESSOR
LID
THERMAL LIMIT
CONDENSER
D
TEMP. CONTROL
CONTROL BOX
DEFROST
TIMER
EVAPORATOR COIL
DEFROST
HEATER
removed and wiped dry with an absorbent cloth or towel. After
the cabinet is dry, restore power to the unit and wait at least 60
minutes before reloading with product.
IMPORTANT: Do not attempt to speed up the de-icing
process by scraping or chiseling frost build up on the
cabinet, as you may puncture the walls and refrigeration
tubing located behind them, resulting in an expensive
repair that is not covered under your warranty.
The temperature control on cold wall models is located in the
electrical console box on top of the cabinet, behind the front
grill (see Figure 8B). Remove the front grill by taking out the
2 screws at each end. Gently pull the grill forward, away from
the cabinet, being careful not to damage the tubing from the
thermometer to the sensing bulb. If adjustment is necessary to
maintain the above temperature range only, place a screwdriver
in the thermostat CUT-IN adjustment screw as shown and turn
clockwise for a colder cabinet temperature or counterclockwise for a warmer cabinet temperature. Do not change the
DIFFERENTIAL adjustment screw setting.
(FREEZER ONLY)
(FREEZER ONLY)
EVAPORATOR
HOUSING
AIR DIVIDERS
DRAIN PAN
(IN HOUSING)
FAN PANEL
IMPORTANT: Any adjustments out of the factory design
temperature
range must only be made by a qualified

refrigeration mechanic.

AIR BAFFLE
(INTERIOR TOP)
FIGURE 8B: Cold Wall System

COLD WALL SYSTEM DEFROST AND ADJUSTMENT
On cold wall models, heat is removed from the storage space
through the interior walls, which are chilled by cooling tubes
embedded in the insulation behind the interior top, back and
side walls (see Figure 8B). Since the wall temperatures are well
below freezing 0°C (32°F), it is normal for condensation and
frost to form on the inside walls. The interior walls should be
DETAIL D
wiped down regularly withSCALE
a dry cloth,
to remove any moisture
1 : 10
accumulation.



Cold wall models should be manually defrosted periodically, to
minimize ice accumulation on the interior walls. To defrost your
unit, unload all product and place it temporarily in a separate,
refrigerated storage unit. Keep the doors open and disconnect
power to the cabinet by unplugging the power cord for approximately 30 minutes. This will allow any frost to melt. Any water
that accumulates on the sides or bottom of the cabinet must be
14
OPERATIONS MANUAL




CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS
INTERIOR ACCESSORIES
FIGURE 9A: Heavy Duty Shelf Support
The standard accessory package supplied with your new cabinet
includes pilaster strips with clips (four (4) clips per shelf), three
(3) epoxy coated shelves per section, and four (4) epoxy coated
shelves per section on glass door models only.
SHELVING INSTALLATION
Pilaster strips which support the shelving are secured to the
cabinet walls with special pilaster screws which allow the strips
to be readily removed for cleaning without the use of tools. Shelf
clips are easily installed by inserting them into the pilasters at
the desired shelf location and shelf installation is as simple as
placing the shelf on the clips. The standard pilaster and clip are
shown in Figure 9, and the optional heavy-duty pilaster and clip
are shown in Figure 9A.
IMPORTANT NOTE: When loading shelves, allow space
between rows of product for proper air circulation and
leave at least a 2” air space between product and the
back wall. FOR PROPER PERFORMANCE, DO NOT LOAD
PRODUCT AGAINST THE BACK WALL.
FIGURE 9: Standard Shelf Support
To ensure proper air flow down the inside back wall of your
cabinet, some models are provided with product stops that snap
onto the shelves (see Figure 9B). To install, place a product
stop over a shelf as shown and press it down onto the shelf. If
necessary, carefully pull out on the ends of the product stop,
so the bottom of the rod snaps over the shelf wire. Press down
on the hooks at ends of the product stop, to they snap over the
back of the shelf
frame.
Repeat for
remaining shelves. Make sure
SHELF
PRODUCT
STOP
product stops
are positioned
at the back of your cabinet.
INSTALLATION
INSTRUCTIONS
Place Product Stop over back end of Shelf as shown.
Pull one end of PRODUCT STOP out slightly, so it snaps over Shelf wire.
9B: Product
Stopso hook snaps over back of Shelf frame.
Gently FIGURE
push end of PRODUCT
STOP down,
Repeat for other end of Product Stop.
BACK OF
CABINET
INSTALLING
PRODUCT STOP
PULL OUT
PRODUCT STOP
INSTALLED
PUSH
DOWN
SHELF
OPERATIONS MANUAL
15
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS PRECAUTIONS
MAINTENANCE
NEVER USE HARSH DETERGENTS, ABRASIVE CLEANERS,
SCOURING POWDERS, OR CHEMICALS CONTAINING
HALOGENS (CHLORINE, FLUORINE, IODINE, ETC.)
WHEN CLEANING YOUR UNIT. CONCENTRATED IODINE
OR IRON EXTRACT, WHICH CAUSE DISCOLORING,
SHOULD BE RINSED OFF IMMEDIATELY IF CONTACT
OCCURS. SEE “CLEANING OF STAINLESS STEEL”
SECTION FOR MORE INFORMATION.
SAFETY PRECAUTIONS
DISCONNECT THE POWER CORD BEFORE ATTEMPTING
TO WORK ON OR CLEAN EQUIPMENT. DO NOT
ATTEMPT TO REMOVE ANY COVERS OR PARTS
YOURSELF, AS THIS CAN EXPOSE DANGEROUS,
HIGH VOLTAGE WIRING. SERVICE SHOULD ONLY BE
PERFORMED BY A QUALIFIED TECHNICIAN. ALWAYS
ROUTE POWER CORDS AWAY FROM AREAS WHERE
THEY CAN BE WALKED ON OR DAMAGED BY OTHER
EQUIPMENT. YOUR APPLIANCE IS EQUIPPED WITH
A POLARIZED, GROUNDED POWER PLUG. NEVER
ATTEMPT TO REMOVE THE GROUND POST OR USE
A NON-POLARIZED ADAPTER, WITHOUT PROPERLY
GROUNDING THE EQUIPMENT.
PERIODIC CLEANING PROCEDURE
It is always best to clean your refrigerator or freezer when the
product load in your cabinet is as its lowest level. To clean the
interior or exterior cabinet surfaces, follow these procedures:
1. Disconnect your cabinet from its power supply, remove all
product from inside and temporarily move it to a walk-in or
other refrigerated storage.
2. Open all doors and allow the cabinet to reach room temperature. Remove all accessories (shelves, racks, pilasters,
clips, etc.) from inside and wash them with a baking soda
and warm water solution, rinse thoroughly with clean water.
Dry all accessories completely with a soft clean cloth.
3. Once the cabinet has reached room temperature, wash all
inside and outside surfaces with a solution of warm water
and baking soda. Pay particular attention to the face of the
cabinet, as any residue or debris can impair the door seal.
For slightly more difficult cleanups, ammonia or vinegar in
warm water can be used. Rinse thoroughly with clear water
and dry with a soft clean cloth. Carefully wash all of the
vinyl door gaskets with clean water, dry them and check for
any damage, which may affect the seal. Failure to dry all
surfaces completely may cause water stains or streaking on
the aluminum or stainless steel finish.
4. Return all accessories to their original locations, reconnect
the power. Wait at least 1 hour before reloading product.
16
GENERAL PREVENTATIVE MAINTENANCE
The most important thing you can do to maintain any refrigerator or freezer and extend its life, is to keep the condenser clean.
Performance of the air-cooled condensing unit, located on top of
the cabinet, depends exclusively upon the amount of air passing
through the condenser fins. Your refrigerator or freezer will run
more efficiently, consume less energy, and provide a maximum
of trouble-free service throughout its lifetime if the condenser is
kept clean and an adequate supply of clean, cool air is provided
at all times. Periodically (at least once a month) inspect the
condenser coil, which is located directly behind the front grill, to
check for debris or blockage.
If the condenser coil is dirty or dusty, disconnect the cabinet
power supply and use a stiff brush to wipe away any dirt and
debris from the condenser fins. Using a vacuum cleaner with a
brush attachment may aid in this process. After cleaning, restore
electrical service to your model.
OPERATIONS MANUAL
CAUTION: CONDENSER FIN PLATES ARE MADE FROM
THIN METAL AND HAVE SHARP EDGES. ALWAYS
WEAR GLOVES. USE CAUTION WHEN WORKING ON OR
AROUND THE CONDENSING UNIT TO PREVENT CUTS
AND AVOID DAMAGING FINS, TUBING AND OTHER
COMPONENTS. FAILURE TO PROPERLY CLEAN THE
CONDENSER REGULARLY WILL CAUSE EXCESSIVE
COMPRESSOR LOAD, REDUCING THE PERFORMANCE
AND EFFICIENCY OF YOUR UNIT. THIS CAN RESULT IN
PREMATURE FAILURE AND VOID YOUR WARRANTY.
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS
CARE AND CLEANING OF STAINLESS STEEL*
DO NOT USE: abrasive
cleaners, chemicals with
chlorides or muriatic
acid to clean your
equipment.
*Some information and graphics for this section were obtained from “Stainless
Steel Equipment Care and Cleaning” brochure, published by the North American
Association of Food Equipment Manufacturers (NAFEM).
Contrary to popular beliefs, stainless steel can rust, if not properly cared for and maintained (That’s why it’s called stain-LESS
steel, not stain-PROOF steel.)
All steel is primarily made of
iron. Stainless steels contain
other metals, such as chromium and nickel, that provide an
invisible film on the surface of
the steel that acts as a shield
against corrosion. As long as
this invisible layer is intact and
not broken or contaminated,
the metal will retain its corrosion protection and remain
stain-less.
3. HARD WATER causes spots and stains on stainless steel
surfaces, particularly when it is heated. Find out the hardness of your water and treat it properly, if needed. Use a
water filter and softeners if you have hard water. Club soda
can be used to remove streaks or spots.
There are 3 basic things that can break down the protective
layer on your stainless steel, which must be avoided:
1. MECHANICAL ABRASION is caused by things that
scratch the surface of the metal. Only use soft cloths or
plastic scouring pads to clean and always scrub in the
same directions as the metal grain.
DO NOT USE: hot or hard water to clean stainless steel.
CLEAN YOUR STAINLESS STEEL REGULARLY using the proper
tools and cleaners. After cleaning, always rinse, rinse, rinse
thoroughly with cool, clean, clear water.
CHECK ALL OF YOUR EQUIPMENT PERIODICALLY. If you see
any signs of rust, clean the area immediately, with a plastic
scrubbing pad. If surface rust is removed promptly, permanent
corrosion, pits and cracks may be avoided. Special stainless
steel polishes, that can help restore the protective coating on
your equipment, are available from a variety of retailers.
DO NOT USE: abrasive cleaners, steel pads, wire
brushes, scrapers or knives to clean your equipment.
2. CHLORIDES are found in water, salt, food and worst
of all, many cleaners. Only use chloride-free, alkalinebased, non-abrasive cleaners. Always rinse thoroughly
with cool, clean water and dry with a soft towel. A solution of 1 tablespoon baking soda mixed with 1 pint water
can be used to remove tough stains.
IMPORTANT: If these recommendations are not followed,
the protective film on your stainless steel can break down
and your equipment may begin the long walk down the
dark road of corrosion.
OPERATIONS MANUAL
17
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS PARTS AND SERVICE
Continental is committed to providing the best customer service
in the industry. All new units come with a Limited Extended
Protection Warranty (see “Warranty” section of this manual for
details). If a problem arises with your equipment, please contact
our Service Department at 1-800-523-7138 (extension 3301,
3302, or 3303). One of our Service Specialists will do everything
possible to solve the problem as quickly as possible.
ITEMS NOT COVERED UNDER WARRANTY INCLUDE, BUT ARE
NOT LIMITED TO:
• Preventative maintenance: cleaning condenser
coils and other components.
• Consumables: light bulbs, door gaskets, batteries.
• General hardware adjustments: cabinet leveling,
casters/legs, doors/hinges.
• Problems due to: inadequate installation or supply
power; improper maintenance, operation, or abuse.
• Compressor failure due to: dirty condenser, insufficient clearance/ventilation, excessive temperatures.
• System adjustments and calibrations, including:
controls, thermometer and expansion valves.
OBTAINING REPLACEMENT
PARTS UNDER WARRANTY
If replacement parts are required for a unit under warranty,
contact Continental’s Service Department. New parts will be
sent from the factory and, when applicable, a Return Goods
Authorization (RGA) will be issued to return old parts. The RGA
number must appear on the packaging of any parts returned, or
they will not be accepted. If a service agent uses a part from their
stock, Continental will replace it with a factory part.
OBTAINING REPLACEMENT
COMPRESSOR UNDER WARRANTY
If the compressor should fail within the first twelve (12) months
of use, or within twenty (20) months from the date code on the
compressor, an “over-the-counter” exchange must be made
at an authorized Copeland, Danfoss, Embraco, or Tecumseh
wholesaler.
After the first year, the compressor motor is covered under an
extended “parts only” warranty. The customer is responsible for
any labor charges and any additional parts that may be required.
Contact the Service Department to obtain a replacement compressor through one of the following methods:
• Continental will supply a replacement compressor
at no charge and pay for regular freight. (If expedited freight is requested, the end user, dealer or
service agent is responsible for additional charges and must provide credit card information.
• A compressor can be purchased locally and
Continental will either replace the stock unit with
a new factory compressor, or offer an allowance
towards the purchase of a replacement compressor, up to: $100 for 1/5hp to 1/3hp; $250 for
1/2hp to 3/4hp; $350 for 1hp to 2hp.
Consult the Table of Contents in the front of this manual for detailed information on the items listed above.
Contact Continental’s Service Department with any
additional questions.
PLACING A SERVICE CALL
In order to receive prompt service, always be prepared to provide your: cabinet model and serial number; cabinet location
name and date installed; contact name and phone number; plus
a description of the problem.
During normal business hours (Monday to Friday, 8am to 5pm
Eastern) contact the Service Department at: 1-800-523-7138
(extension 3301, 3302, or 3303) prior to any warranty service
work being performed.
The data tag from the defective compressor (or compressor model, serial number and date code, if the tag cannot be
removed) must be included with any reimbursement request.
After normal business hours, or on weekends, notify our Service
Department by sending an email to: jcadwallader@nrac.com,
or leaving a voice message at: 1-800-523-7138 (extension
3301). Be sure to provide the information listed above. Contact
Continental the following business day, during normal business
hours, to verify the status of your call.
18
OPERATIONS MANUAL
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS
OPTIONAL ACCESSORIES
Continental offers a variety of accessories for your unit.
CHROMATOGRAPHY REFRIGERATORS
(Shelf, Vapor-Proof Receptacle, Access Port)
Laboratory refrigerators for secure chromatography applications
are provided standard with cantilever shelves. One vapor-proof
receptacle is provided in the back of each section, with an
external supply cord and plug that must be connected to a separate, suitable power source. An access port is also provided in
each end of chromatography cabinets. After routing any cables
through an access port, ensure the opening is sealed, to avoid
air leakage and possible condensation around the port.
PAN SLIDE ASSEMBLIES
Pan slide assemblies are available in a variety of configurations
(see Figure 11). The unique design of the vertical supports
allow the pan slides to be mounted on 1” centers and be readily removed for cleaning, without the use of tools or additional
hardware. If your new unit was ordered from the factory with
pan slides, the vertical supports will be pre-installed directly on
the outer walls of the cabinet. On 2- and 3-section cabinets, the
vertical pan supports in the middle of the cabinet are mounted to
center supports as shown (see Figure 11A). The pan slides are
wrapped up in the accessory package, inside the cabinet.
FIGURE 11: Pan Slide Assembly Configurations


FIGURE 10: Chromatography Accessories CH1R










PRESSURE RELIEF VENT PORT
An optional Vent Port can be supplied on new cabinets, to provide
equalized air pressure between the interior and exterior, caused
by sudden temperature changes,
primarily due to door openings. The
port, located in the side or back wall
of the cabinet, has a two-way flapper that is maintenance-free, but
should be checked periodically for
proper operation and to ensure no
frost accumulates in the vent.
PAN SLIDE INSTALLATION
Pan slides should be installed in pairs, to ensure each set is
level at the same height. Before installing the slides, determine
the spacing desired between each pan that will be placed in the
cabinet. Align one of the pan slides against the vertical support
(see Figure 11A). Simultaneously insert the (2) studs on the
slide into the upper end of the slot on the vertical supports at the
desired height and the pan slide will simply drop down and lock
into place. Install another slide into opposite vertical supports,
using the same method. Check that the pair of slides are level
and at the proper height. Repeat this procedure for the remaining sets of pan slides.
OPERATIONS MANUAL
19
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS WIRE RACKS IN 2 SECTION INTERIOR
FIGURE 11B: Wire Rod Pan Slides
FIGURE 11A: Pan Slide Assembly Components
PAN SLIDES MOUNTED IN 2 SECTION INTERIOR
PAN SLIDE
INSTALLATION
TOP MOUNTING BRACKETS
(FRONT LH / REAR RH)
CENTER
VERTICAL
SUPPORT
TEMPLATE
RH SLIDE
SUPPORT
TOP MOUNTING BRACKETS
(FRONT RH / REAR LH)
TOP WIRE RACKS
DETAIL
VIEW
PAN
SLIDES
BOTTOM
MOUNTING BRACKETS
BOTTOM WIRE RACKS
LH SLIDE
SUPPORT
INTERIOR ROLL-OUT DRAWERS
WIRE PAN SLIDE RACKS
Reach-In & Pass-Thru Models
Wire rod pan slide racks are attached directly to the left and
right walls in the cabinet and to vertical mounting brackets in
the center sections, between the doors, on 2 & 3-section models (see Figure 11B). To install Wire Pan Racks in a unit that
previously had shelves or metal pan slides, mounting holes will
need to be drilled in the side walls of the cabinet. Contact the
service department for detailed instructions and a template for
locating the mounting holes.
20
Optional interior roll-out drawers are available for most models
(see Figure12). The drawers are mounted to vertical posts
inside the cabinet and the height is adjustable for different configurations to suite your requirements. Each telescoping drawer
slide assembly includes a cabinet member that mounted to the
vertical side supports, a center sliding member with ball bearings, and a drawer member mounted to the side of the drawer
body. A finger release clip, mounted to each drawer member,
keeps the drawer from accidently sliding out too far.
To completely remove a drawer from the cabinet, pull the drawer
all the way out until it stops on the retaining clips. Separate the
drawer assembly from the cabinet by pushing down on the right
side clip and up on the left side clip while simultaneously pulling the drawer assembly forward and out of the cabinet. Before
reinstalling the drawer, make sure the ball bearing retainer is
pulled forward against the black plastic guides on the front of
the middle member, to allow the tapered ends of the drawer
member to pass in between the balls on the retainer. Align the
drawer members, so they pass freely thru the guides on the
OPERATIONS MANUAL
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS
middle members and push the drawer assembly all the way in.
There may be some resistance the first time to synchronize all
the balls in the retainer. Never use excessive force when inserting a drawer, as this may cause damage to the retainers.
FIGURE 12: Interior Roll-Out Drawers



Remove the paper by turning the retaining nut (at the center of
the chart) counter-clockwise to unscrew it. Lift the old paper out
and position the new chart so the current day and time coincide
with the time indicator groove (located to the left of the chart).
Reinstall the retaining nut by screwing it by hand securely
against the chart. Press and hold the ‘3’ button briefly again,
just until the pen begins to move back onto the chart. Release
the button, allow the pen to move to its final position and make
sure the pen is marking on the chart paper. If it is not, carefully
adjust the pen arm to establish contact with the paper. Close and
latch the recorder door.








CHART RECORDER
CHANGING CHART PAPER
To change the paper chart, open the front door and locate the ‘3’
button (labeled “CHANGE CHART”), at the top left of the chart
(see Figure 13). Press and hold the ‘3’ button briefly, just until
the pen arm begins to move to the left. Release the button and
allow the pen to move completely off the chart.
NOTE: The indicator light will turn off while the recorder
is in the “CHANGE CHART” mode.




To replace the 9V battery, open the front door by lifting on the
release latch and rotating the door open (see Figure 13). Locate
the battery at the top right of the chart, carefully disconnect the
supply wires and remove the battery from the retaining clips.
Install a new 9 volt alkaline battery in the clip, attach the supply
wires securely, close and latch the door.


The 7-Day Chart Recorder, available as an option on most new
models, features a large 6” diameter paper chart (see Figure
13) battery backup, and inkless pen that never needs replacing.
When the recorder is powered on, the indicator light (located
to the bottom left of the chart) will stay lit continuously. The
indicator light will flash for up to 24 hours (with a fresh battery)
if there is a power failure to the recorder, either due to loss of
main power or weak battery. If the indicator light is flashing
and the main supply power is providing full line voltage to the
recorder, then the 9 volt backup battery needs to be replaced.
Additional information and replacement charts are available from
the manufacturer of the chart recorder.
CALIBRATING CHART RECORDER
Your recorder has been accurately calibrated at the factory
and should be in service for at least 24 hours before making
any adjustments. To the check temperature calibration, place
a certified test thermometer in a solution bottle alongside the
recorder’s sensor probe. Wait until the temperature readings
stabilized and compare the position of the pen on the recorder
to the test thermometer reading
If adjustment is required, open the front door and locate the
‘1’ (left arrow) and ‘2’ (right arrow) buttons, at the top left of
the chart (see Figure 13). To move the pen position to the left,
press the (>) button and hold it until the pen begins to move
(after approximately 5 seconds). Release the button when the
pen is at the desired position. Press and hold the (<) button
the same way to move the pen position to the right, if required.
Once the temperature indicated on the chart corresponds with
the temperature shown on the test thermometer in the solution,
close the door and return the temperature probe to its original
position.
OPERATIONS MANUAL
21
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS 
FIGURE 13: Chart Recorder Glycol Bottle




HINGED GLASS DOOR REMOVAL
AND ADJUSTMENT



















Removal and adjustment of hinged glass doors are similar to
solid doors except that heated glass doors have an electrical
cord attached to the cabinet. Before attempting to remove a
glass door, disconnect the cabinet from the power supply.
Using a Phillips screwdriver, loosen the retaining screw from
the molded plug and gently pull the plug out of the molded
receptacle. Carefully pry off all hinge covers using a sharp tool or
knife (see Figure 14). Swing the door to the open position (90°)
and carefully lift the door upward, so the hinge pin (attached to
the door) clears the hinge body (mounted to the cabinet). If it
is necessary to remove the hinge bodies from the cabinet, use
caution when loosening the top hinge body, as they contain the
light switch actuator (see Figure 7A).

 

FIGURE 14: HINGE
Hinged GLASS
Glass Door
Components
DOOR
COMPONENTS
POWER CORD
WITH PLUG
GLYCOL BOTTLE
An optional Glycol Bottle is available, which can be filled with
ethylene glycol solution (not included) to provide a thermal buffer. This stabilizes the temperature probe measurements to prevent inaccurate readings and false alarms
A due to erratic changes
in air temperature from door openings. The Glycol Bottle has a
septum lid with a round opening on the top and a white rubber
washer, for inserting and sealing in your temperature probe.
To utilize this feature, open the door of your refrigerator or
freezer and locate the Glycol Bottle (typically attached to the side
wall with a clamp). Carefully remove the glass bottle from the
clamp and unscrew the cap. If you are inserting a probe in the
bottle for the first time, use a knife to puncture a slit in the center
of the white rubber washer. Insert the probe through the hole
in the top of lid and press the probe tip through the slit in the
washer. Fill the bottle with your ethylene glycol solution, allowing enough space for the probe without overflowing. Place the
probe into the bottle and tighten the lid. Clamp the Glycol Bottle
inside the cabinet, with the probe securely in place. Note: Use
care when handling, as the glass bottle is fragile and the glycol
solution can be slippery.
ATTACHMENT
SCREW
HINGE
SCREWS
HINGE
COVER
HINGE PIN
DOOR
HANDLE
DOOR
FRAME
GASKET
DETAIL A
SCALE 1 : 4
22
OPERATIONS MANUAL
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS
SLIDING GLASS DOOR REMOVAL
AND ADJUSTMENT
All sliding glass doors are easily removable for thorough cleaning. To remove the doors, slide the outer door (see Figure
15) open about half way, grasp the door on both sides and lift
straight up, off roller track, which will remain in the mounting
frame. Tilt the bottom of the door out, so it clears the locating
studs on the roller track and the bottom of the mounting frame.
Gently set the door down, being careful not to over-stretch the
self-closing spring and power cord that are attached to the top of
the door. Move the door towards its closed position, to release
any tension on the spring and power cord. The roller track will
simply lift out of the channel in the bottom of the mounting
frame. Repeat this procedure for the inner door.
To replace the doors, reverse the steps above, making sure the
door seats properly over the locating studs on the roller track.
If your sliding door does not close firmly, remove the doors,
starting with the outer door, as described above. Check the bottom of the door, mounting frame channel, and rollers to make
sure they are clean and free of debris. If the rollers are damaged
or do not turn freely, contact the factory to order replacement
parts. The tension on the self-closing spring is adjustable, to
provide quicker and firmer closing, or to provide slower and
more gentle movement. Remove the screw attaching the end
of the self-closing spring to the top of the door. Note that there
are (3) threaded holes provided in the top of the door. To adjust
the door so it closes slower, reattach the spring at a position
closer to the handle side of the door. For a faster, firmer closing,
relocate the spring at a position further away from the handle
side of the door.
If the door does not seal evenly along the handle side when
in the closed position, the tilt of the door is adjustable. A flat
washer can be placed over the locating stud on the top of the
roller track, between the track and the underside of the door, to
level the door. For example: if the door contacts the mounting
frame at the top when it is closed, but there is a gap at the lower
half of the side edge, remove the door as described above. After
lifting the door off the roller track, place a flat washer over the
stud located closest to the handle side of the door. Replace the
door, recheck the seal, and readjust if needed. (To close a gap at
the upper half of the door, place a washer over the locating stud
farthest from the handle side of the door.)
IMPORTANT NOTE: The glass used in sliding or hinged
glass doors is of special, sealed pane design and cannot be replaced with ordinary window or plate glass.
If it becomes necessary to replace the glass, it can be
obtained directly from the factory.
SLIDING GLASS DOOR COMPONENTS
FIGURE 15: Sliding Glass Door Components
ELECTRICAL RACEWAY
SPRING
POWER CORD
MOUNTING
FRAME
LOCK DETAIL
HANDLE
LOCK
WITH STOP
RECEIVER
PLATE
RIGHT HAND
(OUTER)
DOOR
DOOR LOCK
(WHEN PROVIDED)
LEFT HAND
(INNER)
DOOR
ROLLER TRACK
ROLLER DETAIL
LOCATING
STUD
TRACK
ROLLER
DIGITAL THERMOMETER WITH ALARM
Your NSF-approved digital thermometer with alarm provides
precise temperature indication from a remote sensing bulb,
located inside the cabinet on the left-hand wall. Additional features include:
•
•
•
•
•
•
•
•
•
•
Large, easy to read LED display (24-Volt AC)
Data logging highest and lowest temp
Flashing display visual alarm
Battery backup (9-volt battery not included)
Adjustable alarm set points (2)
Alarm reset switch (manual, automatic)
NO/NC alarm relay contacts (1 amp)
Switchable alarm delay (0 or 45 minutes)
24VAC output for audible alarm (by others)
Switchable audible silencing (none, 5 or 45min)
OPERATIONS MANUAL
23
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS While in transit, your cabinet is subjected to more jarring and
vibration than at any other time, and the display may require
some adjustment at start-up. Refrigerators are designed to
maintain 3° to 4°C (38° to 40°F), Freezers -20° to -18°C (-4°
to 0°F) and Low Temp Freezers -28° to -26°C (-19° to -15°F).
During periods of heavy use, when doors are opened repeatedly
or remain open for extended period, or if warm product is loaded
in the cabinet, the temperature displayed may temporarily
exceed the “normal” range. This is common, as warm air outside the cabinet mixes with cold air inside. If your thermometer
continues to display temperature above “normal” range, close
the doors, make sure they seal tight and keep them closed for at
least 30 minutes. If a high temperature is still displayed, check
the thermometer by placing a pre-calibrated temperature sensing device in the center of the refrigerated compartment and
keep the doors closed for at least 15 minutes. The thermometer
should display the same temperature as the sensing device,
within +/-2°F (+/-1°C). If it does not, follow instructions below
for calibration mode to adjust the offset.
WIRE CONNECTIONS
T
NO
= High Alarm Set Point
= High Set Point value*
LSP
-40 to 199
= Low Alarm Set Point
= Low Set Point value*
HI
-40 to 199
= High temperature log
= Highest temperature recorded since reset last
pressed (Press Reset to clear value)
LO
-40 to 199
= Low temperature log
= Lowest temperature recorded since Reset last
pressed (Press Reset to clear value.)
CAL
-30 to 30
= Calibration Mode
= Calibration temperature display offset value*
= Normally open
relay contact
= Common
relay contact
C
NC
= Normally closed
relay contact
B
= Black sensor
wire (ground)
W
= White sensor
wire (signal)
R
= Red sensor
wire (+5)
AC
= Power supply
DIP SWITCH SETTINGS
ADJUSTING PROGRAM SETTINGS
Press ‘SET’ on front to display settings in this order:
HSP
-40 to 199
= Output voltage
(for audible alarm)
Switch
1
OFF =
No alarm delay
ON = 45 minute
alarm delay
Switch
2
OFF =
Automatic alarm reset
Switch
3&4
OFF =
No alarm silencing
Switch
3
OFF
AND
ON = Alarm
Switch 4 silenced after
5 minutes
Switch
4
OFF
AND
ON = Alarm
Switch 3 silenced after
45 minutes
ON = Manual alarm
reset required
ON = No alarm
IMPORTANT: All dip switch functions should be set
before powering the unit on.
DEFINITIONS
Calibration example: If sensing device in cabinet reads 2° and thermometer
displays 5°, press ‘SET’ 10 times, to display temperature offset value. Then
press down arrow three times, to decrease offset by 3°. (If original offset value
displayed was “0”, then “-3” will appear).
Alarm
Delay
Alarm activates immediately, or after time
interval, when temp. exceeds set point
Alarm Silencer Press “Reset” switch to silence
the audible alarm
*To adjust value, press up or down arrow until desired setting is
displayed. Then press ‘SET’ to save.
Alarm Silence
Time
IMPORTANT: If sequence is interrupted for more than 15
seconds, or not completed to where the display flashes
once, unit will automatically revert back to temperature
mode, WITHOUT saving new values (tamper resistant).
Automatic
Reset
Alarm will automatically stop after
temperature returns within normal settings
Battery
Indicator
Three dots light up on bottom of front
display when battery is low or not installed
Manual Reset
“Reset” must be pressed to stop audible/
visual alarm, even if temp returns to normal
If you need additional help, please contact the factory.
24
OPERATIONS MANUAL
Number of minutes that will elapse until
audible alarm automatically silences
No Alarm
Audio and visual alarm functions disabled
Power out
display
If power is lost, press “Reset” to display
temperature and sound audible alarm
CONTINENTAL SCIENTIFIC REFRIGERATORS &CASTER
FREEZERS SUPPORT
MOUNTING CASTER SUPPORT PLATES
If casters on a cabinet are not properly maintained and tightened, or if the unit is excessively overloaded and moved around,
the threaded inserts in the bottom of the cabinet can become
stripped, twisted or collapsed. If this occurs and the stem casters cannot be mounted securely, rigid caster support plates can
be fitted to provide the strength needed to safely use your cabinet. Each caster support plate assembly is made of heavy gauge
galvanized steel, with (2) casters permanently welded to it, for
maximum rigidity. The plate has a series of holes that will allow
you to fasten the plate assembly to the bottom of the cabinet
with sheet metal screws and bolts. Contact the factory to obtain
the correct parts for your model.
IMPORTANT NOTE: Always wear proper work gloves and
use appropriate safety equipment. You may CAREFULLY
lay the cabinet on its back, but only FOR A BRIEF PERIOD
OF TIME. Caution must be taken to ensure you DO NOT
DAMAGE the back or side panels, as well as the copper
tubing and refrigeration components located on top of
your cabinet. The cabinet must be properly blocked, to
allow room to get your hands in to lift without damaging
the cabinet or crushing the end panels. DO NOT PLUG-IN
OR OPERATE THE REFRIGERATION SYSTEM FOR AT
LEAST THREE (3) HOURS AFTER THE UNIT HAS BEEN
RETURNED TO AN UPRIGHT POSITION, AS THIS CAN
DAMAGE THE COMPRESSOR.
To install caster support plate assemblies, you will need a 3/4”
open end wrench (or a large adjustable wrench), a drill with a
1/8” bit and a Phillips bit (or a Phillips-Head screwdriver) plus
work gloves. A 1/2-13 thread tap is also recommended, to repair
any damage to the threaded inserts in the cabinet. Unload all
product and carefully lay the cabinet on its back. Remove the old
stem casters by unscrewing them from the cabinet. If a caster or
threaded insert has been stripped or cross-threaded, it may be
necessary to use a wrench to loosen the caster.
PLATES
FIGURE 16: Caster Support Plates
SUPPORT ASSEMBY
1/2-13 BOLT
(2 PER PLATE)
FLAT WASHER
(2 PER PLATE)
Using the small holes in the plate as a template, drill 1/8 pilot
holes in the bottom of the cabinet. (Note: drill only until you
penetrate the metal bottom of the cabinet. Do not continue
to drill into the insulation, or you may damage the cabinet.)
Secure the caster support plate assembly to the cabinet with a
sheet metal screw in each of the drilled holes. Tighten the 1/2”
bolts. Repeat these steps to attach the other plate assembly to
the opposite end of the cabinet.
Check that both plates are secure and that the casters turn
and swivel freely. Carefully lift the cabinet upright and double
check that the caster support plates are secure and the cabinet
is stable. Wait at least 3 hours before turning the refrigeration
system back on, and at least another 30 minutes for the cabinet
to come down to temperature and stabilize, before reloading
with product.
Hold one of the support plate assemblies under the cabinet as
shown (see Figure 16). Position it so the slotted holes at the end
of the plate line up with the threaded inserts in the bottom of the
cabinet (where the stem casters were attached). Attach the plate
assembly to the cabinet by putting a 1/2” x 1-3/4” long bolts and
flat washer through the slot in the support plate and screwing
into each of the threaded inserts in the bottom of the cabinet.
Snug the bolts down, but do not tighten them completely. If
one of the threaded inserts is stripped or damaged, a thread tap
should be used to clean the threads.
OPERATIONS MANUAL
25
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS REMOTE SET-UP AND INSTALLATION GUIDELINES
All remote refrigerators and freezers are shipped with an expansion valve, thermostat and defrost timer (freezer only), installed
from the factory. The installer is responsible for connecting all
refrigerant lines, liquid line drier, sight glass, solenoid, head
pressure control, hi/low pressure safety, crankcase heater, condensing unit and any other accessories as well as wiring. The
evaporator section has been factory leak checked with helium,
however; due to vibration in transit, the entire system must be
thoroughly leak checked after installation and prior to start-up.
The final leak inspection of the entire completed refrigeration
system and all of its components as well as start-up and the
operation of the refrigeration system is the sole responsibility
of the installer.
and low sides of the system using heavy duty vacuum
hoses.
6. Each system should be charged with the refrigerant type
as specified on the cabinet data tag. This refrigerant type
should match the type listed on the condensing unit being
used. The refrigerant charge should be held to the minimum required for the satisfactory pull down and operation. For an accurate indication of refrigerant charge, the
sight glass will show a full column of liquid.
7. The superheat reading taken 6” from the compressor suction valve should be 30° +/- 5°. Expansion valve adjustment may be necessary to achieve this superheat.
8. Installation of the electric condensate vaporizer is also
the responsibility of the installer (see “Installing Electric
Condensate Vaporizer” under “Optional Accessories”).
The CFC-Free refrigerant used in standard remote and selfcontained models is R-134a for refrigerators and R-404a for
freezers. All compressors and systems designed for these refrigerants utilize polyester oil as their main lubricant, which absorbs
moisture from the ambient surroundings extremely fast and in
much greater quantity than conventional mineral oils. Since
moisture levels greater than 100 PPM will result in system corrosion and ultimate failure, it is imperative that the compressor,
components and entire system be kept sealed.
CAUTION: EXTREME CARE MUST BE USED WHEN
ACCESSING THE SYSTEM DURING INSTALLATION. DUE
TO THE COMPLEXITY OF REMOTE REFRIGERATION
SYSTEMS AND THE POTENTIAL FOR IMPROPER
INSTALLATION, ANY RESTRICTIONS, LEAKS, FAILED OR
DAMAGED COMPONENTS CAUSED BY CONTAMINANTS
ARE NOT THE RESPONSIBILITY OF CONTINENTAL
REFRIGERATOR.
1. All refrigerant lines and components must be clean, free of
burrs and purged with nitrogen prior to and during brazing
or soldering connections. Nitrogen purging during brazing or soldering will eliminate carbon or foreign matter
contamination. Any system restrictions or contamination is
the responsibility of the installer.
2. Condensing unit or compressor shall not be left open to
the atmosphere for more than five (5) minutes.
3. No refrigeration component, tubing or fitting shall be left
open to the atmosphere for more than ½ hour without
being soldered, capped or plugged.
4. Each completed refrigeration system shall be purged with
150psi of dry nitrogen for at least six (6) seconds, then
pressurized with at least 165psi of nitrogen for pressure
check (making sure to energize any solenoid valves to
assure access). Leak-check all joints, flare fittings and
valves and make sure there is no pressure drop within the
system.
5. System evacuation is of the utmost importance with NONCFC refrigerant systems. System must be evacuated to a
minimum of 200 microns. In addition, a vacuum decay
test is strongly recommended to assure there is not a
large pressure differential between the system and the
vacuum pump. System must be evacuated from both high
26
OPERATIONS MANUAL
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS
MODEL # ___________________________________________SERIAL # ________________
Notes:_______________________________________________________________
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OPERATIONS MANUAL
27
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS TROUBLESHOOTING GUIDE
PROBLEM
PROBABLE CAUSE
Condensing unit will not
start - no hum.
1.
2.
3.
4.
5.
6.
Condensing unit will not
start - hums but trips on
overload protector.
1.
2.
3.
4.
5.
Condensing unit starts
and runs, but short
cycles on overload
protector.
CORRECTION
1.
2.
3.
4.
5.
6.
Close start or disconnect switch.
Replace Fuse.
Determine reason and correct/replace.
Relocate control.
Repair or replace control.
Check wiring against diagram.
Improperly wired.
Low voltage to unit.
Starting capacitor defective.
Relay failing to close.
Compressor motor has a shorted or open
winding.
6. Internal mechanical trouble in compressor.
7. Insufficient air supply.
1.
2.
3.
4.
5.
Check wiring against diagram.
Determine reason and correct.
Determine reason and replace.
Determine reason and replace.
Replace compressor.
1. Additional current passing through overload
protector.
1. Check wire diagram. Check for added
components connected to wrong side of
overload protector.
2. Determine reason and correct.
3. Check current, replace protector.
4. Determine reason and replace.
5. Check ventilation, restrictions in cooling
medium or refrig. system.
6. Check for misapplication.
7. Clear condenser and allow compressor
to cool down.
2.
3.
4.
5.
Line disconnected, switch open.
Fuse removed or blown.
Overload protector blown.
Control “Off” due to cold location.
Control stuck in open position.
Wiring improper or loose.
Low voltage unit.
Overload protector defective.
Run capacitor defective.
Excessive discharge pressure.
6. Excessive suction pressure.
7. Insufficient air supply.
Condensing unit starts,
but fails to switch off of
“start” winding.
1.
2.
3.
4.
5.
Improperly wired.
Low voltage to unit.
Relay failing to open.
Run capacitor defective.
Excessively high discharge pressure.
6. Replace compressor.
7. Clear condenser and allow compressor
to cool down.
1.
2.
3.
4.
5.
6. Compressor motor has a shorted or open
winding.
7. Internal mechanical trouble in compressor.
Check wiring against diagram.
Determine reason and correct.
Determine reason and replace.
Determine reason and replace.
Check discharge shut-off valve, possible
overcharge.
6. Replace compressor.
7. Replace compressor.
Condensing unit runs,
but short cycles on:
1. Overload protector.
2. Thermostat.
3. High pressure cut-out due to:
(a) Insufficient air supply.
(b) Overcharge.
(c) Air in system.
4. Low pressure cut-out due to:
(a) Valve leak.
(b) Undercharge.
(c) Restriction in expansion device.
1. Check current, replace protector.
2. Differential setting must be widened.
3.
(a) Check air supply to condenser.
(b) Evacuate and re-charge.
(c) Evacuate and re-charge.
4.
(a) Replace, evecuate and re-charge.
(b) Evacuate and re-charge.
(c) Replace expansion device.
Condensing unit runs,
but for prolonged periods or continuous.
1.
2.
3.
4.
Shortage of refrigerant.
Control contacts stuck closed.
Excessive heat load placed into cabinet.
Prolonged or too frequent door openings.
5.
6.
7.
8.
Evaporator coil iced.
Restriction in refrigeration system.
Dirty condenser.
Filter drier clogged.
1. Fix leak, evacuate and re-charge.
2. Clean contacts or replace control.
3. Allow unit sufficient time for removal of latent
heat.
4. Plan or organize schedule to correct condition.
5. Defrost evaporator coil.
6. Determine location and remove.
7. Clean condenser coil.
8. Replace, evacuate and re-charge.
28
OPERATIONS MANUAL
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS
TROUBLESHOOTING GUIDE
PROBLEM
PROBABLE CAUSE
CORRECTION
Start capacitor open,
shorted or blown.
1. Relay contact not opening properly.
2. Prolonged operation on start cycle:
(a) Low voltage to unit.
(b) Improper relay.
(c) Starting load too high.
3. Excessive short cycling.
4. Improper capacitor.
1. Clean contacts or replace relay.
2.
(a) Determine reason and correct.
(b) Replace with correct relay.
(c) Correct by using pump down.
3. See “Condensing Unit Short Cycles” above.
4. Determine correct size and replace.
Run capacitor open,
shorted or blown.
1. Improper capacitor.
2. Excessively high line voltage, over 110%
of rated maximum.
1. Check size and replace.
2. Determine reason and correct.
Relay defective or blown
out.
1.
2.
3.
4.
5.
6.
7.
1.
2.
3.
4.
5.
6.
7.
Product zone
temperature too high.
1. Control setting too high.
2. Inadequate air circulation.
Incorrect Relay.
Incorrect mounting angle.
Voltage too low or too high.
Excessive short cycling.
Loose or vibrating mounting position.
Incorrect run capacitor.
Loose wiring on relay or overload.
Check relay and replace.
Remount relay in correct position.
Determine reason and correct.
See “Condensing Unit Short Cycles” above.
Remount rigidly.
Replace with proper capacitor.
Tighten all wiring screws.
3. Dirty condenser.
1. Adjust T-stat.
2. Rearrange product load to improve air
circulation.
3. Clean condenser coil.
Suction line frosted or
sweating.
1.
2.
3.
4.
1.
2.
3.
4.
Liquid line frosted, cold
or sweating.
1. Restriction in drier strainer.
2. Liquid line service valve partially closed.
1. Replace drier, evacuate and re-charge.
2. Open valve fully or replace if necessary.
Noisy condensing unit.
1.
2.
3.
4.
1.
2.
3.
4.
Thermometer reads
different than actual
temperature.
1. Calibration.
2. Defective.
1. Consult Operations Manual and calibrate.
2. Replace.
Water leak inside unit.
1. Condensate drain pan not installed properly.
1. Consult Operations Manual for install
instructions.
2. Make sure unit is level or pitched back slightly.
3. Make sure drain pan is aligned properly.
4. Replace.
Overcharge of refrigerant.
Evaporator fan not running.
Expansion valve stuck open.
Expansion valve superheat too low.
Loose parts or mounting.
Tubing rattle or vibration.
Bent fan blade causing excessive vibration.
Fan bearings worn.
2. Unit not level.
3. Drain pan misaligned.
4. Defective drain pan.
Doors misaligned.
1. Shifted during shipping.
Evacuate and re-charge.
Determine reason and correct.
Clean valve, evacuate and re-charge.
Adjust superheat to required setting.
Tighten all mounting parts and shroud cover.
Reform tubing to be free of contact.
Replace fan blade.
Replace fan motor.
1. Refer to Operation Manual for hinge
adjustment.
OPERATIONS MANUAL
29
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS 30
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CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS 32
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CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS 34
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CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS 36
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37
CONTINENTAL SCIENTIFIC REFRIGERATORS & FREEZERS WARRANTY
United States of America & Canada
ONE (1) YEAR PARTS AND LABOR WARRANTY
Continental Scientific warrants to the original purchaser of every new Continental Scientific self contained unit, including all parts thereof, that such equipment is free
from defects in material and workmanship, under normal use, proper maintenance and service as indicated by Continental Scientific installation and operation manual,
for a period of one (1) year from the date of installation, or fifteen (15) months from the date of shipment from the manufacturer, whichever comes first. Normal wear
type parts, such as light bulbs/lamps and gaskets are not covered by this warranty. For the purpose of this warranty, the original purchaser shall be deemed to mean
the individual or company for whom the product was originally installed.
Continental Scientific’s obligation under this warranty shall be limited to repairing or replacing, including labor, any part of such product which proves thus defective.
Continental Scientific reserves the right to examine any product claimed to be defective. The labor warranty shall be for self-contained units only and for standard
straight time, which is defined as normal service rate time, for service performed during normal working hours. Any service requested outside of a servicer’s normal
working hours will be covered under this warranty for the normal rate and any additional overtime rate will be the responsibility of the equipment purchaser.
Any part determined to be defective in the product should be returned to the company within thirty (30) days under the terms of this warranty and must be accompanied
by the cabinet model, serial number, and identified with a return material authorization number, issued by the manufacturer.
Special installation/applications, including remote locations, are limited in coverage by this warranty. Any installation that requires extra work, and/or travel, to gain
access to the unit for service is the sole responsibility of the equipment purchaser.
Improper operation resulting from factors, including but not limited to, improper or negligent cleaning and maintenance, low voltage conditions, inadequate wiring, and
accidental damage are not manufacturing defects and are strictly the responsibility of the purchaser.
Condenser coils must be cleaned at regular intervals. Failure to do so can cause compressor malfunction and will void warranty. Continental Refrigerator recommends
a minimum monthly cleaning, as stated in the installation and operation manual.
ADDITIONAL FOUR (4) YEAR COMPRESSOR PART WARRANTY
In addition to the warranty set forth above, Continental Scientific warrants the hermetically/semi-hermetically sealed compressor (part only) for an additional four
(4) years beyond the first one (1) year warranty period; not to exceed sixty-three (63) months from the date of shipment from Continental Scientific, provided upon
receipt of the compressor, manufacturer examination shows the sealed compressor to be defective. This extended warranty does not cover freight for the replacement
compressor or freight for return of the failed compressor. Also, this extended compressor-part only warranty does not apply to any electrical controls, condenser,
evaporator, fan motors, overload switch, starting relay, capacitors, temperature control, filter/drier, accumulator, refrigeration tubing, wiring harness, labor charges, or
supplies which are covered by the standard warranty above.
THE FOREGOING WARRANTIES ARE EXPRESSLY GIVEN IN LIEU OF ALL OTHER WARRANTIES, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, WHICH ARE HEREBY DISCLAIMED, ALONG WITH ALL OTHER OBLIGATIONS OR
LIABILITIES ON OUR PART. AND WE NEITHER ASSUME, NOR AUTHORIZE ANY OTHER PERSON TO ASSUME FOR US, ANY OBLIGATION OR LIABILITY IN CONNECTION WITH THE SALE OF SAID REFRIGERATION UNITS OR ANY PARTS THEREOF.
This warranty shall not be assignable and shall be honored only in so far as the original purchaser.
This warranty does not apply outside the limits of the United States of America and Canada, nor does it apply to any part that has been subject to misuse, neglect,
alteration, accident, or to any damage caused by transportation, flood, fire, acts of terrorism, or acts of God.
IN NO EVENT SHALL CONTINENTAL SCIENTIFIC BE LIABLE FOR CONSEQUENTIAL, SPECIAL OR PUNITIVE DAMAGES. THE REMEDIES OF PURCHASER SET FORTH
HEREIN ARE EXCLUSIVE AND THE TOTAL LIABILITY OF CONTINENTAL SCIENTIFIC, WHETHER BASED ON CONTRACT, WARRANTY, NEGLIGENCE, INDEMNIFICATION, STRICT LIABILITY, TORT, OR OTHERWISE, SHALL NOT EXCEED THE PURCHASE PRICE OF THE COMPONENT UPON WHICH LIABILITY IS BASED. CONTINENTAL SCIENTIFIC SHALL HAVE NO OBLIGATION OR LIABILITY FOR CONSEQUENTIAL OR SPECIAL DAMAGES, INCLUDING BUT NOT LIMITED TO INDIRECT, PUNITIVE
DAMAGES, LOSS OF USE, LOSS OF PRODUCT, DOWNTIME OR LOST PROFITS, ARISING OUT OR, RELATED TO OR CONNECTED IN ANY WAY WITH THE PRODUCT
OR ITS USE.
A Division of National Refrigeration & Air Conditioning Products, Inc.
539 Dunksferry Road • Bensalem, PA 19020-5908
P 215-244-1400 • 1-800-523-7138 • F 215-244-9579
www.continentalrefrigerator.com
38
OPERATIONS MANUAL
A Division of National Refrigeration & Air Conditioning Products, Inc.
539 Dunksferry Road • Bensalem, PA 19020-5908
P 215-244-1400 • 1-800-523-7138 • F 215-244-9579
www.continentalscientific.com
®
Please Note: All models NSF certified (excluding prefix “CH” and suffix “CW” models)
IM-Scientific-RI-Lt Blue-50199-20130415
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