Introduction
This manual provides essential information for the proper use, maintenance, and troubleshooting of your De'Longhi Nespresso Espresso/Cappuccino Machine EN520 Milk Tank. This milk tank is designed as a replacement or additional component for compatible De'Longhi Nespresso espresso and cappuccino machines, specifically the EN520 series. Please read this manual thoroughly before first use to ensure optimal performance and longevity of the product.
Safety Information
- Hand Wash Only: This milk tank is designed for hand washing only. Do not place it in a dishwasher, as high temperatures and harsh detergents can cause damage, clouding, or warping of the plastic material.
- Handle with Care: Avoid dropping or subjecting the milk tank to strong impacts, which could lead to cracks or breakage.
- Proper Fit: Ensure the milk tank is correctly seated and secured in your espresso machine before operation to prevent leaks or malfunction.
- Food Safety: Always clean the milk tank thoroughly after each use to prevent bacterial growth and maintain hygiene, especially when storing milk.
- Temperature Limits: Do not expose the milk tank to extreme temperatures (e.g., direct heat sources or freezing), as this may compromise its structural integrity.
Product Overview
The De'Longhi Nespresso EN520 Milk Tank is a clear, durable plastic container designed to hold milk for frothing and dispensing with compatible Nespresso espresso machines. It integrates seamlessly with the machine's milk frothing system.

Figure 1: The De'Longhi Nespresso EN520 Milk Tank, a clear plastic container designed for milk storage and frothing.

Figure 2: Exploded diagram illustrating the milk tank (labeled as item 96) and its connection points to the main espresso machine unit, including the frothing mechanism (item 95).
Setup
- Unpack: Carefully remove the milk tank from its packaging.
- Initial Cleaning: Before first use, hand wash the milk tank with warm water and a mild dish soap. Rinse thoroughly and dry completely.
- Fill with Milk: Open the lid of the milk tank and fill it with your desired type of milk. Do not overfill beyond the maximum fill line, if indicated.
- Attach to Machine: Align the milk tank with the designated slot on your De'Longhi Nespresso EN520 espresso machine. Gently push it into place until it clicks securely. Ensure the frothing tube is properly inserted into the tank.
Operating
The milk tank operates in conjunction with your De'Longhi Nespresso EN520 espresso machine's milk frothing function. Refer to your main espresso machine's user manual for detailed instructions on selecting milk-based beverages and initiating the frothing process.
- Ensure the milk tank is filled with fresh, cold milk.
- Confirm the milk tank is securely attached to the machine.
- Select your desired milk-based coffee (e.g., Cappuccino, Latte Macchiato) on your espresso machine's control panel.
- The machine will automatically draw milk from the tank, froth it, and dispense it into your cup.
Maintenance
Regular cleaning of the milk tank is crucial for hygiene and optimal performance.
- After Each Use:
- Remove the milk tank from the machine.
- Empty any remaining milk.
- Disassemble the milk frothing components (if applicable, refer to your machine's manual).
- Hand wash all parts of the milk tank and frothing components with warm water and mild dish soap.
- Rinse thoroughly under running water to remove all soap residue.
- Dry all parts completely with a soft cloth or air dry before reassembling or storing.
- Storage: Store the clean and dry milk tank in a cool, dry place. If storing milk in the tank in the refrigerator, ensure it is covered.
- Avoid Abrasives: Do not use abrasive sponges, scouring pads, or harsh cleaning agents, as these can scratch or damage the plastic.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Milk tank appears cloudy or discolored. | Washed in dishwasher; exposure to high heat or harsh chemicals. | This damage is often irreversible. Replace the milk tank. Always hand wash only. |
| Milk not frothing properly. | Milk tank or frothing components are dirty/clogged; incorrect milk type/temperature. | Thoroughly clean all milk tank and frothing components. Ensure milk is fresh and cold. Refer to your machine's manual for frothing tips. |
| Milk tank leaks when attached. | Tank not properly seated; damaged tank or seal. | Ensure the tank is securely clicked into place. Inspect the tank for cracks or damage. If damaged, replace the tank. |
Specifications
- Brand: De'Longhi
- Model: COMIN16JU004347
- Color: Clear
- Product Dimensions: 3"D x 3.5"W x 4"H (approximate)
- Item Weight: 0.32 ounces (approximate)
- Material: Plastic
- Compatibility: Designed for De'Longhi Nespresso Espresso/Cappuccino Machine EN520 series.
Warranty and Support
This milk tank is a replacement part. For specific warranty information regarding this accessory, please refer to the original warranty documentation provided with your De'Longhi Nespresso Espresso/Cappuccino Machine EN520 or contact De'Longhi customer support directly.
For further assistance, product registration, or to purchase additional accessories, please visit the official De'Longhi website or contact their customer service department. Contact details can typically be found on the De'Longhi website or in the original machine's manual.
De'Longhi Official Website: www.delonghi.com





