REFRIGERATORS AND FREEZERS
Installation, Operation and
Maintenance Instructions
INSPECTION
When the equipment is received, all items should be carefully checked against the bill of
lading to insure all crates and cartons have been received. All units should be inspected
for concealed damage by uncrating the units immediately. If any damage is found, it
should be reported to the carrier at once, and a claim should be filed with the carrier. This
equipment has been inspected and tested in the manufacturing facility and has been crated
in accordance with transportation rules and guidelines. Manufacturer is not responsible for
freight loss or damage.
INSTALLATION
GENERAL
After the unit crate and crate base have been removed, locate the casters or legs found
inside the cabinet. (Not applicable for Roll-In models). Attach the casters or legs to the unit
base by screwing them into the same threaded fittings that were used to secure the crate
base to the cabinet. Insure that the legs or casters are screwed completely into the base.
The cabinet should also be levelled when it is placed in its permanent location.
For shipping purposes, the condensing unit compressor is secured on the extra low
temperature models. Remove the spring clips and loosen the mounting bolts prior to
operation. See the label attached to the condensing unit.
If the doors are out of alignment on the cabinet, the doors can be adjusted. This can be
accomplished by opening the door(s) and loosening the screws that hold both the top and
bottom hinges to the cabinet. After adjusting the door so that it is aligned correctly, tighten
the screws to securely hold the hinges in place.
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VAPORIZER INSTALLATION
Refrigerators and Extra Low Temperature Freezers require the installation of
the condensate vaporizer which is shipped inside the unit compartment. The vaporizer
should be mounted to the cabinet bottom. Reference View 1. In lieu of the vaporizer, these
units can be plumbed to a floor drain following local plumbing codes. Freezers,
Pass-Thru and Roll-In Refrigerators use a hot gas vaporizer. Customer installation is not
required.
Note: Disconnect power prior to installation.
1. Connect the power cord to the vaporizer and place it in the vaporizer bracket.
2. Attach the vaporizer bracket to the back of the unit using the four screws as shown,
making sure the plastic drain tube is in the vaporizer pan.
View 1
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LOCATION
The refrigeration system located at the top of the cabinet requires free air access for proper
operation. Allow a minimum four (4) inch clearance on the top, rear, and sides of the
cabinet. The cabinet should also be levelled when it is placed in its permanent location.
There are no provisions for easily levelling the Roll-In models except by the use of shims.
Only minimal shimming is allowable. A cabinet that will sit directly on the floor without
casters should be levelled when placed in its permanent location. If casters are not used,
it is required by NSF that the cabinet be sealed to the floor with an approved sealant such
as Dow Corning #732 silicone.
ELECTRICAL
Check the proposed outlet to be used to insure that the voltage, phase and current carrying
capacity of the circuit from the electrical panel correspond to the requirements of the
cabinet. NEVER use an extension cord to wire any unit. On permanently connected units,
those not furnished with a plug-in service cord, all inter-wiring between the electrical panel
and the unit must be done in accordance with the National Electric Code and all state and
local codes. Refer to the serial tag for all pertinent electrical information.
Observe all Warning Labels. Disconnect power supply to eliminate injury from
electrical shock or moving parts when servicing equipment.
GENERAL OPERATION
The refrigerators and freezers employ a unit cooler evaporator located outside the cabinet
as the heat removing source. Through the refrigeration process, heat is captured in the
evaporator, transferred to the condensing unit on top of the cabinet, and expelled to the
surrounding outside air. It is extremely important to allow a four (4) inch clearance on the
top, rear, and sides of the unit for the refrigeration process to function properly.
These refrigerators and freezers utilize a programmable controller to control the
temperature and defrost settings. The controller, which is located on the facade of
the unit, is factory set. Please see the default settings sheet and separate
instructions that are included on the operation of this controller.
REFRIGERATORS
During the operation of a refrigerator unit, frost will periodically form on the coil surface.
Each time the compressor cycles "off", the evaporator fans will continue to run, which will
keep the internal temperature uniform and at the same time remove any frost build up on
the coil. The water produced will collect in the unit cooler drain pan and travel down the
drain tube to the condensate vaporizer.
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FREEZERS
After shutting the door on freezer models, a short amount of time must be allowed before
the door can be reopened. This is due to the tight seal maintained between the door and
the cabinet. Waiting a few moments for the pressure to equalize permits the door to be
opened easily.
A positive defrost is required to remove frost from the coil in freezer models. This is
accomplished by energizing heaters during the defrost cycle that are positioned on the coil
surface. The programmable controller is factory set to allow four defrosts per day.
As the preset defrost time is reached, the controller automatically terminates the
refrigeration process by turning off the condensing unit and unit cooler fan motors, and
energizes the defrost heaters. As the coil temperature increases, the frost begins to melt
producing water which runs down the coil to the unit cooler drain pan and exits through the
drain tube to the vaporizer. After all the frost has been removed and the coil temperature
reaches approximately 50°F [10ºC], the defrost is terminated through the action of the
defrost termination control located on the unit cooler, and the refrigeration process
resumes. In order to insure that any excess water remaining on the coil is not sprayed into
the cabinet interior, and all heat generated by the defrost is removed, the unit cooler fans
will not operate until the coil temperature reaches approximately 25°F [-4ºC].
Note: Running a cold wall model freezer in an unconditioned environment may result in
frost build-up inside the cabinet.
GENERAL MAINTENANCE
PERIODIC CLEANING
Beginning with the initial installation, the interior surfaces of the cabinet should be
periodically wiped down with a solution of warm water and baking soda. This solution will
remove any odors from spillage that has occurred. The exterior of the cabinet should also
be cleaned frequently with a commercial grade of glass cleaner.
Monthly cleaning of the condenser will aid the heat transfer characteristics of the
refrigeration system and increase its efficiency. To accomplish this, remove the cover
panel from the cabinet and use a wire brush to loosen any dirt particles that are attached to
the fins. Use a vacuum cleaner to remove the loosened particles. Failure to keep the
condenser coil clean and clear of obstructions could result in temperature loss and
damage to the compressor.
The shelving and pilasters should be periodically cleaned. The shelving should be removed
from the cabinet interior and washed with warm water and mild detergent using a soft
bristle brush or may be washed in a dishwasher large enough to accommodate the
shelving size. Pilasters may be removed from the cabinet interior by using a Philips
screwdriver. Unscrew the Philips head screws securing the pilasters to the cabinet interior
walls. Retain the screws in a secure place for re-installation. Wash the pilasters with warm
water and a mild detergent in a suitable place suitable for this effort such as a deep sink. A
soft bristle brush is recommended to reach the interior area of the pilasters. Re-install the
pilasters and shelving when the cleaning procedure is complete.
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Drain connections to the evaporator pan and the evaporator pan should be periodically
cleaned to prevent any build up of debris, fungi, etc. See the cleaning instructions on the
following page (B13351).
See the instructions below for cleaning the evaporator drain pan.
All moving parts have been permanently lubricated and will generally require no
maintenance.
Door hinges should also be periodically cleaned. The door(s) must be removed to gain
adequate access to the hinges. See the illustrations below for solid door and glass door
removal.
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SOLID DOOR REMOVAL FOR HINGE CLEANING
1. Open door to stay position, locate top hinge of door.
2. Remove
screws for hinge.
After screws are removed, grasp top hinge firmly
and allow the hinge bracket to close to the door.
!!CAUTION!! Hinge under high tension Pinch
point hazard
3. Once tension has been removed lift door up to
remove. Wipe area clean with mild soap, do not
use abrasives.
4. Reverse steps to re-install.
GLASS DOOR REMOVAL FOR HINGE CLEANING
1. Open door, locate door heater power cord (if
applicable) and remove screw.
2. Remove black
spacer clip.
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3. Pry open hinge stay to clear stop pin.
4. Locate hinge tension tool (Taped on door
upon delivery). Insert tool in spring notch on
bottom of door, push toward cabinet and
then release front trigger.
5. Once tension has been removed lift door up to
remove.
6. Remove screws for
hinge.
7. Wipe clean with
mild soap.
Note: reverse process to install door.
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MAINTENANCE SERVICE AND ANALYSIS GUIDE
REFRIGERATION SYSTEMS - ALL MODELS
MALFUNCTION POSSIBLE CAUSE SOLUTION
Compressor will not start - 1. Service cord unplugged 1. Plug in service cord
no hum 2. Fuse blown or removed 2. Replace fus e
3. Overload tripped 3. Determine reasons and correct
4. Control stuck open 4. Repair or replace
5. Wiring incorrect 5. Check wiring against the diagram
Compressor will not start - 1. Improperly wired 1. Check wiring against the diagram
hums but trips on overload 2. Low voltage to unit 2. Determine reason and correct
protector 3. Starting capacitor defective 3. Determine reason and replace
4. Relay failing to close 4. Determine reason, correct or replace
Compressor starts and runs, 1. Low voltage to unit 1. Determine reason and correct
but short cycles on overload 2. Overload defective 2. Check current, replace overload protector
protector 3. Excessive head pressure 3. Check ventilation or restriction in
refrigeration system
4. Compressor hot-return gas hot 4. Check refrigerant charge, fix leak if necessary
Compressor operates long 1. Short of refrigerant 1. Fix leak, add charge
or continuously 2. Control contact stuck 2. Repair or replace
3. Evaporator coil iced 3. Determine cause, defrost manually
4. Restriction in refrigeration system 4. Determine location and remove restriction
5. Dirty condenser 5. Clean condenser
Compressor runs fine, but 1. Overload protector 1. Check wiring diagram
short cycles 2. Cold control 2. Differential too close - widen
3. Overcharge 3. Reduce charge
4. Air in system 4. Purge and recharge
5. Undercharge 5. Fix leak, add refrigerant
Starting capacitor open, 1. Relay contacts stuck 1. Clean contacts or replace relay
shorted or blown 2. Low voltage to unit 2. Determine reason and correct
3. Improper relay 3. Replace
Relay defective or burned out 1. Incorrect relay 1. Check and replace
2. Voltage too high or too low 2. Determine reason and correct
Refrigerated space too warm 1. Control setting too high 1. Reset control
2. Refrigerant overcharge 2. Purge refrigerant
3. Dirty condenser 3. Clean condenser
4. Evaporator coil iced 4. Determine reason and defrost
5. Not operating 5. Determine reason, replace if necessary
Standard temperature system 1. Control setting is too low 1. Reset the control
freezes the product 2. Control points stuck 2. Replace the control
Objectionable noise 1. Fan blade hitting fan shroud 1. Reform or cut away small section of shroud
2. Tubing rattle 2. Locate and reform
3. Vibrating fan blade 3. Replace fan blade
4. Condenser fan motor rattles 4. Check motor bracket mounting, tighten
5. General vibration 5. Compressor suspension bolts not loosened
on applicable models - loosen them
6. Worn fan motor bearings 6. Replace fan motor
Pan Area 1. No cooling 1. Make sure switch is in the "on" position
2. Too cold 2. Adjust temperature control - see instructions
under pan area
3. Too warm 3. Adjust temperature control - see instructions
under pan area
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