Instruction Manual

1. Product Overview

The FD-04H Vacuum Freeze Dryer is a compact and efficient appliance designed for preserving a variety of foods, including fruits, vegetables, meats, and dairy products, through the process of lyophilization (freeze-drying). This method removes moisture while largely retaining the food's nutritional value, flavor, and texture, resulting in lightweight, shelf-stable products.

Figure 1: FD-04H Vacuum Freeze Dryer and Vacuum Pump

Product Structure

Figure 2: Key Components of the Freeze Dryer

• Folding Touch Screen: User interface for operation and monitoring.
• Main Power Switch: Controls the primary power supply to the unit.
• Acrylic Door: Transparent door for viewing the freeze-drying process.
• Exhaust Valve: Used to release air from the vacuum chamber.
• Exhaust/Drain Pipe: Connects to the vacuum pump and for water drainage.
• Stainless Steel Trays: Four food-grade 304 stainless steel trays for holding food items.
• Vacuum Pump: External unit essential for creating the vacuum environment.
• USB Data Interface: For data transfer or software updates.

2. Setup and Installation

1. Unpacking: Carefully remove all components from the packaging. Retain packaging for future transport or storage.
2. Placement: Place the freeze dryer on a stable, level surface with adequate ventilation around the unit. Ensure the unit is not exposed to direct sunlight or extreme temperatures.
3. Vacuum Pump Preparation: The vacuum pump must be filled with special vacuum pump oil before its first use. Refer to the vacuum pump's specific manual for oil type and filling instructions.
4. Connect Vacuum Pump: Connect the vacuum pump to the freeze dryer's vacuum port using the provided hose. Ensure all connections are secure to prevent leaks.
5. Power Connection: Connect the freeze dryer and the vacuum pump to appropriate power outlets (110V 60HZ).
6. Initial Cleaning: Before first use, wipe down the interior of the freeze dryer chamber and the stainless steel trays with a damp cloth and mild, food-safe detergent. Rinse thoroughly and dry.

3. Operating Instructions

Preparation of Food Items

• Wash and prepare food items as desired (e.g., slice fruits, chop vegetables).
• Arrange the prepared food evenly on the stainless steel trays. Avoid overcrowding to ensure proper freeze-drying.

Starting the Freeze-Drying Process

1. Open the acrylic door and carefully slide the trays with fresh food into the machine.
2. Close the acrylic door securely and lock it.
3. Turn on the main power switch.
4. Utilize the folding touch screen interface to select the desired freeze-drying mode and recipe.

Figure 3: Foldable Touch Screen Interface

Freeze-Drying Modes

Figure 4: Normal Mode and Expert Mode Interfaces

• Normal Mode: Features internal pre-made freeze-drying formulas. Simply select the appropriate formula for your food type to initiate the process.
• Expert Mode: Allows users to add and customize freeze-dried formulas, providing greater control over the drying parameters.

Once the mode and recipe are selected, the machine will begin the freeze-drying process. Monitor the progress via the touch screen.

Completion and Shutdown

1. When the freeze-drying process is finished, follow the instructions displayed on the screen or in the operation video to safely turn off the machine and the vacuum pump.
2. Open the vacuum valve (labeled 'Outlet' in some diagrams) to release the air pressure from the chamber. This will allow the door to be opened safely.
3. Once the pressure is equalized, open the acrylic door and carefully remove the trays with the freeze-dried food.

4. Maintenance

Defrosting

After several freeze-drying cycles, ice will accumulate in the cold trap. Defrosting is necessary to maintain efficiency.

1. Initiate the defrosting process via the touch screen interface. Refer to the operation video for detailed steps.
2. During defrosting, water will flow out of the outlet pipe. Ensure a suitable container is placed to collect this water.

Cleaning

• Regularly clean the interior of the freeze dryer chamber and the stainless steel trays after each use. Use a soft cloth and mild, food-safe cleaning solution.
• Ensure all surfaces are thoroughly dried before the next use.
• Clean the exterior of the machine with a damp cloth. Do not use abrasive cleaners or allow water to enter electrical components.

Vacuum Pump Maintenance

• Regularly check the oil level and condition of the vacuum pump.
• Change the vacuum pump oil as recommended by the pump manufacturer's instructions (typically after a certain number of operating hours or if the oil appears discolored).

5. Troubleshooting

• Machine not starting: Check power connections for both the freeze dryer and the vacuum pump. Ensure the main power switch is on.
• Vacuum not forming: Verify that the vacuum pump is properly connected and filled with oil. Check for any leaks around the door seal or hose connections. Ensure the door is securely locked.
• Poor freeze-drying results: Ensure food items are properly prepared and not overcrowded on trays. Verify that the selected program is appropriate for the food type. Check the cold trap temperature (should be around -60°C).
• Excessive noise: Check the vacuum pump for proper oil level and operation. Ensure the machine is on a stable surface.

For persistent issues, please contact customer support.

6. Specifications

Figure 5: Product Parameters and Dimensions

7. User Tips

• For best results, pre-freeze food items before placing them in the freeze dryer, especially if using a custom program.
• Ensure food is cut into uniform sizes to promote even drying.
• Always use the recommended vacuum pump oil and maintain the pump as per its instructions for optimal performance and longevity.
• Store freeze-dried food in airtight containers to prevent moisture reabsorption and maintain freshness.

8. Warranty and Support

For warranty information, technical support, or service inquiries, please refer to your purchase documentation or contact the seller directly. Keep your proof of purchase for any warranty claims.