Mueller Espresso Machine with Conical Burr Grinder

Important Safety Instructions

Before using this electrical appliance, always follow basic precautions:

• Read all instructions and save for future reference.
• Ensure wall outlet voltage matches the appliance's rating plate.
• Do not immerse the appliance, power cord, or plug in water or other liquids.
• Unplug before cleaning and allow to cool completely.
• Do not operate with a damaged cord or plug, or if the appliance malfunctions or is dropped. Return to an authorized service facility for examination or repair.
• If the supply cord is damaged, it must be replaced by the manufacturer or qualified persons to avoid hazards.
• Do not use accessory attachments not recommended by the manufacturer.
• Place the appliance on a flat surface. Do not hang the power cord over edges.
• Ensure the power cord does not touch hot surfaces.
• Do not place the appliance on hot surfaces or near open flames.
• Always grasp the plug to remove it from the outlet; do not pull the cord.
• Use the appliance only for its intended purpose.
• Use extra caution with steam attachments due to potential burns.
• Operate and store in a dry environment, not below 0°F. Avoid high temperatures, strong magnetic fields, or high humidity.
• Do not touch hot surfaces like the steam wand or steel mesh; use handles or knobs.
• Do not operate without water.
• Connect the plug to the outlet before use and switch off before unplugging.
• This appliance is not intended for use by individuals with reduced physical, sensory, or mental capabilities, or lack of experience, without supervision.
• Children aged 8 and above must be supervised to ensure they do not play with the appliance.
• Intended for household and similar applications (staff kitchens, B&Bs, etc.).

Warnings

Pressure

To prevent scalding from hot water and steam, and to prevent product damage:

• Do not remove the water tank or portafilter during brewing or frothing.
• Ensure the appliance is in standby mode before removing the portafilter.
• Turn off the appliance before adding water to the tank.
• Ensure the portafilter is securely locked during extraction to avoid injury from pressure release.

High Temperature

To prevent burns:

• Do not place hands or body parts under the portafilter or steam outlet while the appliance is working.
• Do not touch the steam tube directly; only touch the silicone sleeve.

Getting to Know Your Machine

Overview of Parts

The machine includes:

• Water Tank
• Water Tank Cover
• Beans Hopper
• Beans Hopper Cover
• Knob
• Steam Tube
• Drip Plate
• Floater
• Drip Tray
• Tool Box
• Standard Portafilter
• Bottomless Portafilter
• Single-Layer Single-Cup Filter
• Double-Layer Single-Cup Filter
• Single-Layer Double-Cup Filter
• Double-Layer Double-Cup Filter
• Tamper
• Cleaning Disc
• Cleaning Brush
• Cleaning Pin

Control Panel and Coffee Selection

The control panel features:

• On/Off Button
• Hot Water Button
• Single-Cup (Grind) Button
• Double-Cup (Grind) Button
• Steam Button
• Single-Cup (Coffee) Button
• Double-Cup (Coffee) Button
• Knob Indicator
• Grind Indicator
• Descale Indicator
• Program Button

Before First Use

1. Check all accessories for damage or missing parts.
2. Fill the water tank with clean water, not exceeding the MAX line. Remove the rubber plug at the bottom of the tank if using for the first time.
3. Align the portafilter with the bracket, insert the appropriate filter (no coffee), and lock it by rotating counterclockwise.
4. Place a cup on the drip plate, plug in the appliance, and press the button to start preheating. The appliance enters standby mode after preheating.
5. Turn the knob to the steam position; steam will flow from the steam tube. Align the steam tube with the drip tray.
6. Press the hot water or steam buttons to rinse the pipes. Use a cup to collect water and avoid scalding.
7. Empty the drip tray and cup.
8. Clean detachable parts with warm water.

Choosing the Right Coffee Grinds

For best results:

• Use freshly ground, deeply roasted coffee beans.
• Pre-ground coffee retains aroma for 7-8 days when stored properly.
• Ground coffee stored in a sealed container in a cool place lasts longer. Do not refrigerate or freeze ground coffee.
• Freshly ground beans retain aroma and provide higher quality coffee.
• Grind consistency is crucial for espresso. A correct grind resembles salt.
• Too fine a grind may cause intermittent flow or failure to brew.
• Too coarse a grind leads to fast water flow, affecting aroma and taste.
• Adjust grind coarseness using the coffee bean hopper knob. The ideal setting varies by bean type and quality.
• For freshly roasted beans (within 1 month), set grinding between 5-10.
• The Double-Cup (Grind) setting yields approximately 0.67 oz (19 g) of coffee, and Single-Cup (Grind) yields about 0.46 oz (13 g).
• Do not overfill the bean hopper to prevent moisture buildup.
• Adjust grinding settings for uniform grinds and high-quality coffee.

Operation

Basic Operation

1. Fill the water tank with clean drinking water (not exceeding MAX).
2. Plug in the unit. Press the ON/OFF button (knob at position).
3. Preheating: Press the button. The appliance preheats and enters standby mode when indicators light up.
4. Single-Cup Brewing: Install Single-Cup filter, add ~0.46 oz (13 g) coffee, tamp firmly (~12.5 kg). Lock portafilter, place cup, press Single-Cup (Coffee) button. Appliance brews ~1 oz and stops automatically.
5. Double-Cup Brewing: Install Double-Cup filter, add ~0.67 oz (19 g) coffee, tamp firmly (~12.5 kg). Lock portafilter, place cup, press Double-Cup (Coffee) button. Appliance brews ~2 oz and stops automatically.

NOTE: If coffee grind is too fine and oily, the appliance will beep five times, and all button lights will flash.

Customized Settings

1. Dose Adjustment: Press and hold Single-Cup or Double-Cup (Coffee) button. The corresponding button and Program indicator flash. Dispense coffee to desired amount, then release the button. The appliance saves the dose. (Max single cup: 4.2 oz, Max double cup: 8.5 oz).
2. Factory Reset: Press and hold both Single-Cup and Program buttons. They flash, other buttons turn off, buzzer sounds once. Release buttons to reset to factory settings. For Double-Cup, use the Double-Cup button instead of Single-Cup.

Steam and Hot Water Function

• Turn the knob to the steam or hot water position. The indicator flashes, and steam/hot water is dispensed. Turn the knob to the position to stop.
• NOTE: Steam function generates high-temperature steam; use caution.
• For frothing, extend the steam tube into milk, turn knob to steam position, froth for 3-5 seconds. Turn knob to position to stop.

NOTE: The appliance enters sleep mode after 15 minutes of inactivity. Press any button to reactivate.

Recommendation: Preheat the appliance, portafilter, filter, and cup before brewing for optimal results. Place filter in portafilter, install, place cup, press Single-Cup or Double-Cup (Coffee) button for preheating. Follow brewing instructions after preheating.

Using a Bottomless Portafilter

The bottomless portafilter and Single-Layer Single-Cup filter allow for barista-style brewing and technique improvement. It helps diagnose errors by visually showing the espresso extraction.

• Place Single-Layer Single-Cup filter firmly inside the bottomless portafilter.
• Fill with extra-fine ground coffee, slightly overflowing, and level with fingers.
• NOTE: Ground coffee should be finer than sugar, but not powdered sugar.
• Place the bottomless portafilter on a flat surface for tamping. Use the tamper to press coffee firmly (~30 lbs pressure).
• NOTE: Use pressure similar to removing a tight jar lid.
• Wipe any excess grounds from the filter rim and portafilter.
• Insert and lock the portafilter.

Grinding

Ensure all parts are installed correctly before grinding.

1. Install the bean hopper and screw it in place, aligning the red circles with the rib on the appliance. The red indicator turns off when correctly installed.
2. Adjust grind coarseness using the knob on the bean hopper (0=fine, 30=coarse). Align the desired setting with the mark on the appliance rib.
3. Ensure the bean hopper is installed and locked.
4. Add coffee beans to the hopper, avoiding overfilling to prevent moisture buildup.
5. Single-Cup Grind: Place portafilter with filter into the bracket. Press Single-Cup (Grind) button. Grinder runs and stops automatically. Press button again to stop anytime. Default time ~10 seconds for ~0.46 oz (13 g) coffee.
6. Double-Cup Grind: Press Double-Cup (Grind) button. Grinder runs and stops automatically. Press button again to stop anytime. Default time ~14 seconds for ~0.67 oz (19 g) coffee.

Tamping: Remove portafilter, tap on a flat surface, add coffee. Tamp downward with ~12.5 kg force. Align tamper edge with portafilter edge.

NOTES:

• Bean hopper indicator red and grinding buttons off, with three beeps, indicates incorrect installation or grinder limitation. Reinstall hopper or clean grinder.
• Grinder protection: If used continuously for 3 minutes with less than 6 minutes rest, the function is limited. Bean hopper indicator flashes red, grinding buttons off, three beeps. Wait 6 minutes for normal operation.

Grinding Timer Setting

Set a timer for automatic grinding:

1. Press and hold Single-Cup (Grind) or Double-Cup (Grind) button to start grinding. Indicators flash.
2. Release the button when the desired ground coffee amount is reached. The timer is saved.
3. Next time, press the button to grind automatically.

Factory Reset for Grinding Time: Press and hold both the respective Grind button and Program button. They flash, other buttons turn off. Release after one beep.

Customizing Temperature Control

The appliance features PID control for consistent temperature. Default is 197.6°F (92°C). Options: 194°F (90°C), 197.6°F (92°C), 201.2°F (94°C), 204.8°F (96°C).

• Higher temperature increases bitterness, decreases acidity.
• Lower temperature decreases bitterness, increases acidity.

To set temperature: Press and hold Program button for 4 seconds. Use Single-Cup (Grind), Double-Cup (Grind), Single-Cup (Coffee), or Double-Cup (Coffee) buttons to select desired temperature (194°F, 197.6°F, 201.2°F, 204.8°F). Press Program or ON/OFF button to save and exit.

IMPORTANT NOTE: The setting mode exits after 1 minute of inactivity.

Restore to Factory Settings

Press and hold the ON/OFF button and Program button simultaneously. The appliance beeps, and all indicators flash three times, returning to factory settings.

Water Shortage Reminder

When the water tank is low, the appliance flashes and beeps five times. It enters standby mode after 1 minute of alert if no action is taken.

Cleaning and Maintenance

Overview of Cleaning and Descaling Tools and Procedures

WARNING: Unplug before cleaning. Allow to cool. Do not immerse the appliance or cord in water.

• After each use, clean detachable parts with water and mild detergent. Rinse thoroughly.
• Wipe the exterior with a damp sponge.
• NOTES: Do not use alcohol or harsh detergents. Do not immerse the appliance in water.
• Clean portafilter and metal filters with mild detergent. Rinse and dry completely.
• The detachable water tank is not dishwasher safe.

Tool Box and Cleaning Accessories

The tool box stores cleaning pin, brush, disc, and filters. It's located at the lower left, accessible by removing the drip tray.

• Cleaning Disc: Used with cleaning tablets for the brewing system during rinsing or descaling. Place in portafilter with tablet and mount on brewing head.
• Cleaning Pin: Used for cleaning the steam spout (thicker end) and filters (thinner end).
• Cleaning Brush: Used for cleaning the grinding system (grinder chamber and powder channel). Also used to clean the anti-static device and coffee grounds outlet. The rear end detaches filters from the portafilter.

Clean the Grinder

Clean the powder outlet and grinder every two weeks or when:

• Coffee grind amount reduces.
• Grinding fine coffee.
• Coffee powder spreads outside the portafilter (clean anti-static device and outlet).

NOTE: Ensure no beans in the hopper when cleaning. Ensure grinder works properly after cleaning.

1. Rotate bean hopper (2) counterclockwise to remove.
2. Turn internal cutter head (1) counterclockwise to unlock. Remove and clean the cutter head and gears with the brush (do not rinse with water).
3. Use the brush to clean the grinding chamber and powder channel.
4. Reinstall the empty bean hopper. Press Single-Cup (Grind) or Double-Cup (Grind) button to run the grinder and sweep out residue. Repeat if necessary.
5. Remove bean hopper and reinstall the cutter head.

Descaling

The appliance has a descaling reminder and program. Descaling takes ~10 minutes.

NOTE: For descaling program: Ensure ≥1L water in tank, empty drip tray, turn on appliance to standby. Place cleaning disc and Double-Cup filter in portafilter, mount on brewing head.

You can exit descaling by pressing the ON/OFF button.

Descaling Instructions

Recommended every 4-6 months. Use descaling tablets, liquid descaler, or white vinegar and warm water.

Descaling Preparation:

• Tablets: Fill tank with 1L water, add tablets, wait to dissolve.
• Liquid Descaler: Add 1/2 cup liquid descaler to tank, then 1L warm water. Mix thoroughly.
• Vinegar: Add 1.5 scoops white vinegar to tank, then 1L warm water. Mix thoroughly.

Descaling Cycle:

1. Place containers (≥1L) under brewing head and steam tube.
2. Press and hold Single-Cup, Double-Cup, and Program buttons simultaneously in standby mode to start descaling.
3. When Descaling indicator flashes quickly, Program and coffee buttons turn off, and ON/OFF button flashes:
4. Turn knob to steam position. Descaling indicator lights up, ON/OFF button flashes. Pump dispenses hot water from brewing head and steam tube.
5. When hot water stops, turn knob to standby position. Descaling indicator and ON/OFF button flash.

IMPORTANT NOTE: Clean steam tube and brewing head with fresh water after descaling.

Completion of Descaling Cycle:

1. Clean water tank, refill with water to MAX. Empty containers.
2. Turn knob to steam position. Descaling indicator lights up, Hot Water indicator flashes. Pump dispenses hot water.
3. When hot water stops, the buzzer sounds, ON/OFF button stops flashing, Descaling indicator turns off, ON/OFF button lights up. Turn knob to standby.

Troubleshooting

If the cause of the problem is not listed, contact Customer Service. Do not disassemble the machine.