De'Longhi EN510B
User Manual
Nespresso Lattissima One Original Espresso Machine with Milk Frother
Model: EN510B
Brand: De'Longhi
1. Introduction
Welcome to the world of Nespresso. This manual provides essential information for the safe and efficient operation of your new Nespresso Lattissima One Original Espresso Machine with Milk Frother. This machine is designed for those seeking a convenient way to prepare milky coffee beverages, including Cappuccinos, Lattes, and Espresso Macchiatos, with a single touch.
The Lattissima One features a compact design, a chrome lever, and subtle gloss and matte patterns. It incorporates a single-serve fresh milk system for ease of use and is constructed with 30% recycled plastic, with 100% recyclable packaging. Please read this manual thoroughly before first use and keep it for future reference.
2. Safety Instructions
Always follow basic safety precautions when using electrical appliances to reduce the risk of fire, electric shock, and injury to persons.
- Read all instructions before using the appliance.
- Do not touch hot surfaces. Use handles or knobs.
- To protect against fire, electric shock, and injury to persons, do not immerse cord, plugs, or appliance in water or other liquid.
- Close supervision is necessary when any appliance is used by or near children.
- Unplug from outlet when not in use and before cleaning. Allow to cool before putting on or taking off parts, and before cleaning the appliance.
- Do not operate any appliance with a damaged cord or plug or after the appliance malfunctions, or has been damaged in any manner.
- The use of accessory attachments not recommended by the appliance manufacturer may result in fire, electric shock, or injury to persons.
- Do not use outdoors.
- Do not let cord hang over edge of table or counter, or touch hot surfaces.
- Do not place on or near a hot gas or electric burner, or in a heated oven.
- Always attach plug to appliance first, then plug cord into the wall outlet. To disconnect, turn any control to “off”, then remove plug from wall outlet.
- Do not use appliance for other than intended use.
3. Package Contents
Please check that all components are present and in good condition:
- Nespresso Lattissima One Espresso Machine
- Milk Frother Jug with detachable lid
- Water Tank
- Drip Tray and Used Capsule Container
- Complimentary Nespresso Original Capsules Starter Set
- User Manual (this document)
4. Product Overview
Familiarize yourself with the main components of your Lattissima One machine:

Figure 4.1: Nespresso Lattissima One Espresso Machine (Shadow Black)
- Water Tank: Located at the back, easily removable for refilling.
- Capsule Insertion Slot: Top opening for Nespresso Original capsules.
- Brewing Unit: Where the coffee is extracted.
- Coffee Outlet: Where the brewed coffee dispenses.
- Milk Frother System: Detachable jug and spout for milk preparation.
- Drip Tray: Collects excess liquid and supports cups.
- Used Capsule Container: Stores ejected capsules.

Figure 4.2: Control Panel and Indicators
- Power Button: Turns the machine on/off.
- Espresso Button: For a single espresso shot.
- Lungo Button: For a longer coffee.
- Milk Recipe Button: For cappuccino or latte macchiato.
- Descaling Alert Light: Indicates when descaling is required.
- Clean Light: Indicates when the milk system needs cleaning.
5. Setup
5.1 Initial Cleaning
- Remove all packaging and protective films.
- Wash the water tank, milk jug, drip tray, and used capsule container with warm water and mild detergent. Rinse thoroughly and dry.
5.2 Filling the Water Tank
- Fill the water tank with fresh drinking water. Do not use milk or other liquids.
- Place the water tank back into its position at the rear of the machine.
5.3 First Use / Rinsing Cycle
Before preparing your first coffee, perform a rinsing cycle to clean the internal system.
- Ensure the water tank is filled.
- Place a container (at least 0.5L) under the coffee outlet.
- Press the Lungo button. The machine will start dispensing hot water.
- Repeat this process two to three times until clear water runs through.
- The machine is now ready for use.
6. Operating Instructions
6.1 Preparing Espresso or Lungo

Figure 6.1: Machine ready to brew coffee
- Ensure the water tank is filled.
- Lift the lever to open the capsule insertion slot.
- Insert a Nespresso Original capsule.
- Close the lever.
- Place a cup under the coffee outlet.
- Press either the Espresso button for a short coffee or the Lungo button for a longer coffee.
- The machine will automatically stop when the desired volume is reached.
- After brewing, lift and close the lever to eject the used capsule into the container.
6.2 Preparing Milk-Based Recipes (Cappuccino, Latte Macchiato)

Figure 6.2: Machine dispensing milk and coffee for a latte
- Ensure the water tank is filled.
- Fill the milk jug with the desired amount of fresh milk (cold, semi-skimmed milk is recommended for best froth). The jug has markings for different recipe volumes.
- Attach the milk jug to the machine's milk frother system.
- Lift the lever and insert a Nespresso Original capsule. Close the lever.
- Place a suitable cup under the milk spout and coffee outlet.
- Press the Milk Recipe button. The machine will first froth and dispense the milk, then brew the coffee into your cup.
- After preparation, remove the milk jug and clean it immediately (see Maintenance section).
7. Maintenance
7.1 Daily Cleaning
- Milk Jug: After each milk preparation, detach the milk jug. The jug and its lid are top-rack dishwasher safe. Alternatively, rinse thoroughly with warm water.
- Drip Tray & Used Capsule Container: Empty and rinse daily.
- Machine Exterior: Wipe with a damp cloth. Do not use abrasive cleaning agents or immerse the machine in water.
7.2 Descaling
The descaling alert light will illuminate when descaling is required. Regular descaling ensures optimal performance and coffee quality.
- Use only Nespresso descaling solution.
- Follow the instructions provided with the descaling kit.
- The descaling process typically involves filling the water tank with the descaling solution, running it through the machine, and then rinsing with fresh water.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No coffee flow | Water tank empty; machine not primed; descaling needed. | Fill water tank; perform rinsing cycle; descale the machine. |
| No milk froth or poor froth quality | Milk jug not clean; milk not cold enough; wrong type of milk. | Clean milk jug thoroughly; use cold, fresh semi-skimmed milk. |
| Machine leaks | Water tank not correctly positioned; drip tray full. | Ensure water tank is firmly in place; empty and reposition drip tray. |
| Coffee is cold | Cup not pre-heated; machine not fully heated. | Pre-heat cup with hot water; wait for machine to fully heat up (lights stable). |
If the problem persists after attempting these solutions, please refer to the official Nespresso or De'Longhi support channels.
9. Specifications

Figure 9.1: Product Dimensions
| Feature | Detail |
|---|---|
| Brand | De'Longhi |
| Model Number | EN510B |
| Color | Shadow Black |
| Product Dimensions (D x W x H) | 6.1"D x 12.8"W x 10.5"H |
| Item Weight | 9.3 pounds |
| Coffee Maker Type | Espresso Machine |
| Filter Type | Reusable |
| Included Components | Milk Frother |
| Operation Mode | Fully Automatic |
| Voltage | 100 Volts |
| UPC | 044387515108 |
10. Warranty and Support
Your Nespresso Lattissima One machine is covered by a manufacturer's warranty. Please refer to the warranty card included in your product packaging for specific terms and conditions, or visit the official De'Longhi or Nespresso website for detailed warranty information.
For further assistance, troubleshooting, or to order accessories and descaling kits, please contact Nespresso Customer Service or visit their official website. You can also find additional resources, including the full User Manual and Installation Manual, online:
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