Norlake UF111 Installation Manual
SCHWAN’S 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 Nor-Lake Manufacturing Facility and has been crated in accordance with
transportation rules and guidelines. Manufacturer is not responsible for freight loss or damage.
INSTALLATION
GENERAL
If for some reason the doors are not squared up on the cabinet, the doors can be adjusted. Opening
the door(s) and loosening the screws that hold both the top and bottom hinges to the cabinet can
accomplish this. After adjusting the door so that it is aligned correctly, tighten the screws to securely
hold the hinges in place.
LOCATION
The refrigeration systems of these cabinets require free air access for proper operation. A minimum
four-inch clearance should be allowed on the rear and sides of the NF241 upright model. The
refrigeration system of the undercounter models is located at the bottom of the unit. These cabinets
may be enclosed on three sides; however, there must be minimum four-inch clearance from the
bottom of the cabinet to the floor. The undercounter models cannot be operated without legs or
casters in place, and the bottom of the cabinet cannot be enclosed. All cabinet models should also
be leveled when placed in their permanent location.
Physical Specifications
Unit Exterior Dimensions Refrigerant
Model Width x Depth x Height* Type/Amount
UF081 27” x 35” x 34-3/4" See Serial Tag
UF111 40" x 35" x 34-3/4" See Serial Tag
UF162 47-3/4" x 35" x 34-3/4" See Serial Tag
NF241 27-1/2" x 34-7/8" x 81-1/2" See Serial Tag
• Note: Height dimension includes 4-3/4” for standard casters.
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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. 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.
Unit Type of
Model
All Models Cord 115/60/1
Connection Voltage/Hz/Ph
GENERAL OPERATION
All undercounter freezers employ a unit cooler evaporator located inside the cabinet as the heatremoving source. The NF241 upright cabinet utilizes a forced air evaporator located on the top of
the cabinet. Through the refrigeration process, heat is captured in the evaporator, transferred to the
condensing unit, and expelled to the surrounding outside air. It is extremely important to maintain
the minimum required clearance, stated in the Location section of this manual, for the refrigeration
process to function properly. The undercounter cabinets cannot be operated without legs or
casters installed.
After closing 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 these freezer models. This is
accomplished by energizing heaters during the defrost cycle that are positioned on the coil surface.
The programmable controller, located on the front of the cabinet, is factory set to allow four defrosts
per day.
When 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 that 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, 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°.
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