KEENSTAR 20Bar Espresso Machine Model JH-C5210 User Manual

1. Introduction

Thank you for choosing the KEENSTAR 20Bar Espresso Machine, Model JH-C5210. This manual provides essential information for the safe and efficient operation, maintenance, and care of your new espresso machine. Please read these instructions thoroughly before first use and retain them for future reference.

2. Important Safety Instructions

When using electrical appliances, basic safety precautions should always be followed to reduce the risk of fire, electric shock, and/or injury to persons, including the following:

Read all instructions.
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. Product Components

Familiarize yourself with the parts of your KEENSTAR Espresso Machine:

Control Panel (Touch Screen)
Water Tank (40oz / 1200ml capacity)
Steam Knob
Portafilter Handle
1-shot Filter Basket
2-shot Filter Basket
Steam Wand / Nozzle
Removable Drip Tray
Cup Plate (Heated)
Coffee Spoon & Tamper

Diagram of KEENSTAR Espresso Machine components — **Image 3.1:** Overview of the KEENSTAR Espresso Machine components, including the control panel, water tank, steam knob, portafilter, filter baskets, steam nozzle, drip tray, cup plate, and coffee spoon with tamper.

4. Initial Setup and First Use

Before using your espresso machine for the first time, follow these steps:

Unpack: Carefully remove all packaging materials and ensure all components are present.
Clean: Wash the water tank, portafilter, and filter baskets with warm soapy water. Rinse thoroughly and dry. Wipe the exterior of the machine with a damp cloth.
Fill Water Tank: Fill the water tank with fresh, cold water up to the MAX line. Do not exceed the maximum fill level.
Power On: Plug the machine into a grounded electrical outlet.
Prime the Machine (Before Each Use): This step drains air from the internal pipes to prevent brewing failure.
- Press the power button on the control panel.
- Turn the steam knob to the "ON" position.
- Wait for water to run out from the steam wand in a steady stream.
- Turn the steam knob to the "OFF" position.
- Turn off the coffee machine.

Five steps for priming the espresso machine before first use — **Image 4.1:** Visual guide for the initial priming process, showing filling the water tank, turning the steam knob ON, waiting for water flow, turning the knob OFF, and powering down.

Diagram showing correct and incorrect water tank fill levels — **Image 4.2:** Illustration demonstrating the correct water tank fill level (up to MAX) and incorrect overfilling or underfilling.

5. Operating Instructions

5.1 Brewing Espresso (Single or Double)

Ensure the steam knob is in the "OFF" position before brewing coffee.

Power On: Press the power button on the control panel. The indicator will blink, signifying preheating.
Prepare Ground Coffee: Use medium ground coffee (>0.5mm). Load the appropriate filter basket (1-shot or 2-shot) with ground coffee (7g for single, 14g for double) and tamp it firmly with the coffee spoon/tamper.
Attach Portafilter: Insert the portafilter into the group head and turn it firmly to the right until it is completely locked. Place a cup(s) on the drip tray.
Preheat: Wait for the indicator light to become steady, indicating the machine is preheated and ready to brew.
Brew: Select "Espresso" for a single shot or "2X Espresso" for a double shot on the touch screen. The machine will begin brewing.

Five steps to brew espresso, including loading coffee, tamping, attaching portafilter, and selecting brew option — **Image 5.1:** Step-by-step guide for brewing espresso, from powering on to selecting the brew option. Note the importance of a steady indicator light for readiness.

Illustration of correct and incorrect portafilter locking — **Image 5.2:** Visual comparison of a completely locked portafilter versus an unlocked one, emphasizing proper securement before extraction.

Comparison of medium ground coffee and fine ground coffee — **Image 5.3:** Guide illustrating the recommended medium grind size (>0.5mm) for optimal espresso extraction, contrasting it with fine powder.

5.2 Making Cold Brew Espresso

The machine offers a rapid cold brew function:

Prepare: Fill the water tank approximately 2/3 full with ice cubes.
Brew: Follow steps 1-3 from "5.1 Brewing Espresso".
Select Cold Brew: On the touch screen, select "Espresso Cool". The machine will brew a cold espresso shot.

KEENSTAR Espresso Machine brewing cold brew espresso with ice in the water tank — **Image 5.4:** The espresso machine preparing a cold brew espresso, with ice visible in the water tank, demonstrating the "Espresso Cool" function.

5.3 Frothing Milk with the Steam Wand

To create creamy milk foam for lattes and cappuccinos:

Power On: Press the power button.
Preheat Steam: Press the "Steam" button on the touch screen to preheat the steam function. The indicator will blink during preheating.
Purge Steam Wand: After preheating is complete (indicator is steady), turn the steam knob to the "ON" position briefly to release any condensed water from the wand. Turn it OFF.
Froth Milk: Insert the steam nozzle approximately 1 inch into the surface of cold milk in a frothing pitcher. Gradually turn the steam knob to the "ON" position.
Texture Milk: Move the pitcher up and down to create microfoam. Once desired texture is achieved, turn the steam knob to "OFF" and remove the pitcher.
Clean Wand: Immediately wipe the steam wand with a damp cloth to prevent milk residue from drying. Briefly turn the steam knob ON again to clear any internal milk.

Five steps for frothing milk using the steam wand — **Image 5.5:** Detailed steps for steaming milk, including preheating, purging the wand, inserting into milk, frothing, and cleaning.

KEENSTAR Espresso Machine with steam wand frothing milk into a pitcher — **Image 5.6:** The espresso machine's steam wand actively frothing milk in a pitcher, demonstrating its capability for creating milk foam.

5.4 Touch Screen Operation

The machine features an intuitive touch screen for various functions:

Espresso: Brews a single shot of espresso.
2X Espresso: Brews a double shot of espresso.
Espresso Cool: Brews a cold espresso shot (requires ice in water tank).
Americano: Brews an Americano.
Steam: Activates the steam wand for milk frothing.
ON/OFF: Powers the machine on or off.

Close-up of the KEENSTAR Espresso Machine's touch screen control panel — **Image 5.7:** A detailed view of the machine's touch screen, showing options for Espresso, 2X Espresso, Americano, Espresso Cool, and Steam functions, along with the power button.

6. Maintenance and Cleaning

Regular cleaning ensures optimal performance and longevity of your espresso machine.

6.1 Daily Cleaning

Drip Tray: Empty and clean the removable drip tray after each use or when the indicator floats up.
Portafilter and Filter Baskets: Remove spent coffee grounds and rinse the portafilter and filter baskets under warm water.
Steam Wand: As mentioned in section 5.3, wipe the steam wand immediately after frothing milk.
Exterior: Wipe the exterior of the machine with a soft, damp cloth. Do not use abrasive cleaners or scouring pads.

KEENSTAR Espresso Machine with removable drip tray and filter — **Image 6.1:** The removable stainless steel drip tray and filter components of the espresso machine, highlighting their ease of removal for cleaning.

Illustration showing hand washing of accessories and warning against dishwashers — **Image 6.2:** A visual reminder that all accessories should be hand-washed and are not suitable for dishwashers.

6.2 Descaling

Over time, mineral deposits can build up in the machine, affecting performance. Descale your machine every 2-3 months, or more frequently if you have hard water.

Prepare Descaling Solution: Mix a descaling solution according to the manufacturer's instructions (or use a mixture of white vinegar and water, 1:1 ratio).
Fill Water Tank: Pour the descaling solution into the water tank.
Run Solution: Place a large container under the portafilter and steam wand. Run the descaling solution through the machine by performing several espresso cycles and activating the steam wand for a few minutes.
Rinse: After the solution has run through, rinse the water tank thoroughly and fill it with fresh water. Run several cycles of fresh water through the machine to remove any residual descaling solution.

7. Troubleshooting

If you encounter issues with your espresso machine, refer to the following common problems and solutions:

Problem	Possible Cause	Solution
No coffee dispenses / Slow flow	Water tank empty Coffee grounds too fine or tamped too hard Machine not primed Clogged filter or group head	Fill water tank Use coarser grind; tamp less firmly Perform priming steps (Section 4) Clean filter and group head; descale machine
Water leaks from portafilter	Portafilter not locked correctly Too much coffee in filter basket Seal ring worn or dirty	Ensure portafilter is fully locked (Image 5.2) Reduce coffee amount Clean or replace seal ring
No steam from wand / Weak steam	Steam function not preheated Steam wand clogged Water tank empty	Press "Steam" button and wait for steady indicator Clean steam wand nozzle Fill water tank
Coffee is not hot enough	Machine not fully preheated Cold cups	Wait for indicator to be steady before brewing Preheat cups on the heated cup plate or with hot water

8. Product Specifications

Feature	Detail
Brand	KEENSTAR
Model Name	JH-C5210
Pressure System	20 Bar Professional Pump
Power	1350W
Water Tank Capacity	40 oz (1200 ml)
Product Dimensions (D x W x H)	11.8"D x 5.5"W x 12.6"H (30cm D x 14cm W x 32cm H)
Item Weight	10 pounds
Coffee Input Type	Ground Coffee, Coffee Beans
Operation Mode	Fully Automatic (for brewing functions)
Special Features	Rapid Cold Brew, Milk Frother Steam Wand, Touch Screen, Heated Cup Holder

Dimensions of the KEENSTAR Espresso Machine — **Image 8.1:** Diagram illustrating the compact dimensions of the KEENSTAR Espresso Machine: 11.8 inches (30cm) deep, 5.5 inches (14cm) wide, and 12.6 inches (32cm) high, with a 1200ml water tank.

9. Warranty and Support

KEENSTAR offers the following support for your product:

30-Day Money-Back Guarantee: If you are not satisfied with your purchase.
1-Year Free Replacement: For manufacturing defects from the date of purchase.
Lifetime After-Customer Service: For ongoing support and assistance.

For customer service inquiries, please refer to the contact information provided with your product packaging or visit the official KEENSTAR website.

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KEENSTAR JH-C5210