1. Introduction
This manual provides essential information for the safe and efficient operation, installation, and maintenance of your Wilprep 28-inch Commercial Worktop Undercounter Refrigerator. Please read these instructions thoroughly before installation and use, and retain this manual for future reference.
The Wilprep REF-GR11-U1 is a single-door commercial undercounter refrigerator designed for professional environments such as restaurants, bars, and shops. It features a stainless steel construction, fan cooling, auto defrost, and a worktop surface for food preparation.

Image 1.1: Wilprep 28-inch Commercial Worktop Undercounter Refrigerator with items on top.
2. Safety Instructions
To reduce the risk of fire, electric shock, or injury, always follow basic safety precautions when using this appliance.
- Electrical Safety: Ensure the refrigerator is connected to a properly grounded electrical outlet. Do not use extension cords or adapter plugs. Disconnect power before cleaning or servicing.
- Placement: Install the unit on a level, stable surface capable of supporting its weight. Allow adequate ventilation around the unit (minimum 4 inches from walls) to ensure proper cooling and prevent overheating.
- Handling: Use caution when moving the unit. It is heavy and may require multiple people or appropriate moving equipment.
- Flammable Materials: Do not store explosive substances or flammable materials inside or near the refrigerator.
- Children: Keep children away from the appliance. Do not allow them to play with or inside the refrigerator.
- Damage: Do not operate the appliance if it has a damaged cord or plug, or if it is malfunctioning or has been dropped or damaged. Contact qualified service personnel.

Image 2.1: The refrigerator is certified for safety by ETL, ETL Sanitation, and DOE.
3. Package Contents
Upon unpacking, verify that all components are present and undamaged. If any items are missing or damaged, contact customer support.
- Wilprep 28-inch Commercial Worktop Undercounter Refrigerator Unit
- Adjustable Shelf (1)
- Casters (4)
- Backsplash (1)
- Instruction Manual

Image 3.1: Interior view of the refrigerator with the door open, displaying storage capacity and an adjustable shelf.
4. Setup and Installation
4.1 Unpacking
- Remove all packaging materials, including tape and protective films.
- Inspect the unit for any shipping damage. Report any damage immediately to the carrier and seller.
4.2 Caster Installation
- Carefully tilt the refrigerator to access the bottom. It is recommended to have assistance.
- Screw the four casters into the designated holes at the bottom corners of the unit. Ensure they are securely tightened.
- Return the refrigerator to an upright position.
4.3 Placement
- Place the refrigerator on a firm, level surface in a well-ventilated area.
- Avoid direct sunlight or heat sources.
- Maintain a minimum of 4 inches (10 cm) clearance from walls and other objects to allow for proper air circulation around the condenser.
4.4 Backsplash Installation
The included backsplash can be installed on the rear edge of the worktop. It can be rotated to either side to suit your workspace needs.

Image 4.1: Diagram illustrating user-friendly features including the adjustable backsplash and casters.
4.5 Initial Power-On
- After placement, wait at least 2 hours before plugging the unit into a grounded electrical outlet. This allows compressor oils to settle.
- The unit will begin cooling. Allow several hours for the refrigerator to reach its set temperature before loading with products.
5. Operating Instructions
5.1 Temperature Control
The refrigerator features a digital LED display for precise temperature adjustment. The operating temperature range is 32°F to 50°F (0°C to 10°C).
- Use the control panel buttons to set your desired temperature. Refer to the specific control panel instructions for detailed button functions.
- The display will show the current internal temperature.

Image 5.1: Close-up of the digital LED display for temperature adjustment and the recessed handle.
5.2 Smart Door Function
The door is designed to automatically close when opened to 90° or less. If opened past 90°, the door will remain open, facilitating loading and unloading.
5.3 LED Interior Light
An internal LED light illuminates the interior whenever the door is opened, providing visibility for stocking and retrieval.
5.4 Adjustable Shelf
The refrigerator includes one adjustable shelf, capable of holding up to 88 lbs (40 kg). Adjust the shelf height to accommodate various product sizes.
5.5 Cooling System
The unit utilizes an Embraco compressor and copper evaporator for efficient fan cooling, ensuring even cold air distribution throughout the cabinet.

Image 5.2: Diagram detailing the powerful cooling components: Air Cooling System, Copper Evaporator, Embraco Compressor, and High-Density Insulation.
6. Maintenance and Cleaning
Regular maintenance ensures optimal performance and longevity of your refrigerator.
6.1 Exterior Cleaning
The exterior is crafted from stainless steel. Clean regularly with a soft cloth and a mild, non-abrasive cleaner. Wipe in the direction of the grain to prevent streaking. Avoid harsh chemicals or abrasive pads.
6.2 Interior Cleaning
Periodically clean the interior with a solution of mild soap and warm water. Remove shelves and clean them separately. Rinse thoroughly and dry completely before returning items to the refrigerator.
6.3 Auto Defrost
The unit features an auto defrost system to prevent frost and ice buildup on the evaporator coil. This process occurs automatically and does not require manual intervention.

Image 6.1: Illustration of the air cooling and auto defrost system, highlighting the stainless steel interior and exterior.
6.4 Condenser Coil Cleaning
The condenser coil, located at the rear or bottom of the unit, should be cleaned every 3-6 months to maintain efficiency. Disconnect power, then use a brush or vacuum cleaner to remove dust and debris from the fins.
7. Troubleshooting
Before contacting service, review the following common issues and solutions:
- Refrigerator Not Cooling: Check if the power cord is securely plugged in. Ensure the circuit breaker has not tripped. Verify the temperature setting is appropriate. Ensure adequate ventilation around the unit.
- Excessive Noise: Check if the unit is level. Ensure no objects are vibrating against the refrigerator. Normal operating sounds include compressor hum and fan noise.
- Door Not Closing Properly: Check for obstructions. Ensure the unit is level. The smart door function will close automatically if opened 90 degrees or less.
- Water on Floor: Check if the drain pan is properly positioned. Ensure the drain line is not clogged.
If problems persist after attempting these solutions, contact customer support.
8. Specifications
| Feature | Specification |
|---|---|
| Brand | Wilprep |
| Model Number | REF-GR11-U1 |
| Capacity | 6.3 Cubic Feet |
| Product Dimensions (D x W x H) | 28 x 31.7 x 35.2 inches |
| Temperature Range | 32°F to 50°F (0°C to 10°C) |
| Installation Type | Freestanding |
| Number of Doors | 1 |
| Defrost System | Automatic |
| Compressor | Embraco |
| Material | Stainless Steel (Interior & Exterior) |
| Special Features | Adjustable Shelves, Smart Door, LED Light, Backsplash, Casters |
| Certifications | ETL, ETL Sanitation, DOE |
9. Warranty and Support
For warranty information or technical support, please refer to the warranty card included with your product or contact Wilprep customer service directly. Ensure you have your model number (REF-GR11-U1) and purchase date available when contacting support.





