Norlake NER482 Installation Manual

NOVA™ ENERGY STAR

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 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

After the unit crate and crate base have been removed, locate the casters or legs found inside the cabinet. 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.

For shipping purposes, the condensing unit compressor is secured on the NEF482 and NEF763 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. 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 system located at the top of the cabinet requires free air access for proper operation. Allow a minimum four-inch (10cm) clearance on the top, rear, and sides of the cabinet. The cabinet should also be leveled when it is placed in its permanent location.

Physical Specifications

Unit Exterior Dimensions Refrigerant NER211 27-1/2" x 34-7/8" x 81-1/2" See Serial Tag

NER482 55" x 34-7/8" x 81-1/2" See Serial Tag NER763 82-1/2" x 34-7/8" x 82-3/4"* See Serial Tag NEF211 27-1/2" x 34-7/8" x 81-1/2" See Serial Tag NEF482 55" x 34-7/8" x 81-1/2" See Serial Tag NEF763 82-1/2" x 34-7/8" x 82-3/4"* See Serial Tag

Model W x D x H (std.w/casters) Type/Amount

* Dimension reflects height with legs. Legs are standard on these models.

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 serial tag and the Electrical Data for all pertinent electrical information.

Observe all Warning Labels. Disconnect power supply to eliminate injury from electrical shock or moving parts when servicing equipment.

Electrical Data

Unit Type of Model NER211 Cord See Serial Tag NER482 Cord See Serial Tag NER763 Permanent See Serial Tag NEF211 Cord See Serial Tag NEF482 Cord See Serial Tag NEF763 Permanent See Serial Tag

Connection Voltage/Hz/Ph

GENERAL OPERATION

The Nova™ refrigerators and freezers employ a unit cooler evaporator located inside 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-inch (10cm) 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.

A switch is located on the front of the facade that can be used to turn the door heater on or off.

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 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 (10°C), 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°. (-4°C)

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.

All moving parts have been permanently lubricated and will generally require no maintenance.

SERVICE

Any correspondence pertaining to these cabinets should be directed to the Service Department of Nor-Lake, Incorporated. Be sure to include the cabinet model number and serial number with any correspondence.

800-388-5253 Parts/Service

Nor-Lake, Incorporated 800-388-5253 Parts/Service 727 Second Street 800-955-5253 Sales P.O. Box 248 715-386-2323 Hudson, Wisconsin 54016 715-386-6149 FAX

email: service@norlake.com

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