AUF48SD

Overview

The Atosa AUF48SD is a two-door commercial undercounter freezer that adds frozen storage near a prep line, bar or service station. Its listed capacity is 11.8 cu. ft. The stainless steel interior and exterior, solid doors and caster-mounted base suit routine use in a commercial kitchen.

The manufacturer’s specification sheet lists overall dimensions of 48 1/4 × 30 × 32 1/2 inches. The user manual’s technical table gives 48 × 30 × 32.5 inches for the AUF48SD. These published dimension figures differ slightly, so check the unit’s data tag and confirm the available space before installation.

Key Features

• Two solid doors: The doors are field reversible and self-closing. The specification sheet lists a stay-open feature at 105°.
• Door sealing: Magnetic door gaskets provide a positive seal.
• Organized storage: Two pre-installed shelves are listed for the AUF48SD.
• Temperature control: An electronic temperature controller manages freezer operation.
• Refrigerant: The unit uses R290 refrigerant.
• Mobility: Standard equipment includes pre-installed 2-inch heavy-duty swivel plate casters, with braked and non-braked caster part numbers listed by Atosa.
• Listings: The product information lists ETL certification and an ETL Sanitation listing.

Specifications

• Manufacturer: Atosa
• Model: AUF48SD
• Equipment type: Two-door undercounter freezer
• Capacity: 11.8 cu. ft.
• Exterior and interior: Stainless steel
• Doors: 2; solid, field-reversible, self-closing, with stay-open feature
• Stay-open door position: 105°, per the manufacturer’s specification sheet
• Shelves: 2 pre-installed shelves
• Door gasket: Magnetic
• Temperature range: The specification sheet states -8°F to 0°F. The manual’s technical table lists -8°F to +1°F.
• Refrigerant: R290
• Refrigerant charge: 4.6 oz, per the manual’s technical table
• Electrical supply: 115V / 60Hz / 1 phase
• Rated current: 2.6 A
• Input power: 300 W, per the manual’s technical table
• Compressor: 1/3 HP, per the manufacturer’s specification sheet
• Electrical connection: NEMA 5-15P
• Manufacturer-sheet overall dimensions: 48 1/4 × 30 × 32 1/2 in.
• Manual technical-table dimensions: 48 × 30 × 32.5 in.
• Net weight: 192 lb
• Gross weight: 249 lb
• Standard casters: 2 in. heavy-duty swivel plate casters; Atosa lists B0604434 with brake and B0604433 without brake for the AUF48SD.
• Optional caster types: Atosa lists 1.2 in. and 1.5 in. low-profile swivel plate casters, plus 4 in. and 5 in. swivel stem casters.
• Certification listings stated in product information: ETL and ETL Sanitation.

Installation & Requirements

Atosa’s manual says to install the unit on a level surface and not in an area exposed to water spray. Do not clean or rinse the freezer with a hose or water spray. If the unit must be moved, the manual says at least two people should handle the move. Inspect it after unpacking and report any damage to the Atosa dealer.

The manual specifies an operating environment from 50°F to 100°F. It also says to position the rear of the unit at least 5 inches from the wall. The manufacturer’s specification sheet advises leaving the freezer room to breathe and cleaning the condenser frequently.

Use a dedicated power supply and a properly grounded outlet. The manual calls for AC 115V, 60Hz, single phase and a grounded three-wire plug. It warns that voltage fluctuations beyond 115V ±10% may cause malfunction, damage or a safety hazard, and advises installing an appropriate automatic voltage stabilizer to prevent this risk. Consult the unit’s data tag for branch-circuit overcurrent protection, fuse requirements and current-carrying capacity. The manual directs users to the wiring diagram inside the distribution box for connection details.

Operation

After positioning the freezer, clean its internal parts and wipe down the metal surfaces before switching it on. Run it empty for at least one hour to check that the refrigeration system is operating. Add food only after the cabinet reaches its specified operating temperature. If power is interrupted or the unit is unplugged, wait at least 5 minutes before restarting.

Keep stored products and other objects from preventing the doors from closing fully. The manual identifies overloaded storage, hot food and inadequate air circulation as abnormal operating conditions that can interfere with reaching the required temperature. The electronic controller is used to regulate the temperature; the manual’s troubleshooting guidance says to check the thermostat setting if the required temperature is not reached.

Cleaning & Maintenance

Atosa advises cleaning the condenser frequently to allow fresh air to reach the refrigeration system. The manual identifies dust on the condenser as a possible cause of poor cooling and lists wiping the condenser with a dry cloth as a troubleshooting measure. Keep water spray and hoses away from the unit to avoid the risk of electric shock.

The manual also identifies a frosted evaporator as a possible reason the cabinet may not reach its required temperature. Check that the freezer is not in a defrost or post-defrost phase, that stored products are not obstructing door closure and that the condenser is not blocked by dust. The manual states that routine maintenance requirements must be followed for warranty coverage.

Troubleshooting

• Freezer does not operate: Check that the plug is properly inserted into the outlet. The manual also lists a damaged supply cord as a possible cause; electrical repairs should be left to authorized service personnel.
• Required temperature is not reached: Check the power connection and temperature setting. The manual lists a switched-off power switch, defrost or post-defrost operation, a frosted evaporator, a dusty condenser, a nearby heat source, doors that cannot close because of stored items, overloading, hot food and poor air circulation as possible causes. Check the operating conditions and contents, and wipe the condenser with a dry cloth as directed.
• Water leaks from the cabinet: The manual lists a damaged collection container or condensation-water elimination device, obstructed discharge outlets and an unlevel installation as possible causes. Check the drain pan, discharge outlets and installation.
• Unacceptable noise: Check for loose frame screws or bolts and confirm that the cabinet is stable and level.

The manual states that repair work must be performed by authorized technicians. Before electrical repair work, disconnect the main power supply. It also instructs service personnel to remove metal accessories such as rings, earrings and watches before working on electrical equipment.

Applications

The AUF48SD can provide convenient frozen storage at a restaurant prep station, in a café or bar, or near a service area where staff need access to frozen ingredients. Its undercounter format makes it a practical option for kitchens adding nearby freezer capacity while using the space beneath a counter.