Overview
Magister Stella Dual Boiler Espresso Machine
The company Magister is relatively new to the espresso industry, starting back in 1997. We started business with them in 2012, bringing in the Stilo line. These were HX machines serviceable in both the home and commercial environments. As our customers became more familiar with the Magister line, the interest in a dual boiler espresso machine started to grow. After years of R&D, they released the Stella line.
Their decision to use copper boilers is one we like. The overall performance in thermal conductivity and temperature stability is superior to stainless steel. Having a rotary vane pump instead of a vibration pump is always a plus, whether hooking your machine up to a water line or not. The less rattling, the more enjoyable pulling a shot is.
Videos


Features
Dual Boiler System:
- Copper, insulated: The boilers are made of copper, which retains heat better than stainless steel. Typically, copper boilers are more susceptible to limescale when compared to stainless steel boilers. Therefore, we highly recommend using a water softener. The manufacturer wraps the boiler with insulation for maximum heat retention.
- Pull a shot & steam milk at the same time: Steam is always readily available at the turn of a knob. Hence, there is no wait time going from coffee to steam mode.
- Auto-shutoff: A sensor detects the water level in the boiler. When below the threshold, the heating element shuts off to prevent it from burning out.
4-Key OLED Display:
- Boiler temperature: Adjust the temperature of both the coffee and steam boilers when active and when in ECO mode.
- Boiler priority: Refers to which boiler refills first when the machine is used. Always use coffee priority to avoid damage to heating element in coffee boiler. If only using the machine for steam and no use of coffee boiler, then set to steam boiler in this scenario only.
- C --> F: Can switch between Celsius and Fahrenheit.
- Shot timer (Chrono function): Visible on display when pulling a shot.
- Counters: Give you a sense how much you use the machine.
- Maintenance schedule: Set for amount of liters of water to recharge water softener or replace water treatment filters for limescale causing agents.
- ECO mode: Machine will go into a low power level mode after a preset time (up to 30 min).
E61 Grouphead:
- Consistent heating: Hot water circulates from the boiler through the grouphead and back to keep the grouphead and your portafilter nice and hot. This keeps the grouphead at a constant, stable temperature compared to other groupheads that have a built-in heating element.
- Flow control capable: Due to the unique design of the grouphead sitting low on the front panel, most flow control kits will not work/fit as the flow paddles will hit the panel. However we do have a compatible flow control kit sold separately.
Dual Pressure Gauge:
- Left side measures bar pressure when pulling a shot of espresso.
- Right side measures steam pressure. Optimal pressure is around 1.6 bar.
Cool Touch Steam / Hot Water Wand:
- Rotary knobs: Allows you to control the power of steam / hot water dispensed.
Rotary Vane Pump:
- Quiet operation: Rotary pumps are necessary for direct connect capable machines since vibration pumps cannot handle the incoming water pressure. The main benefit that you will experience is that they are a lot quieter.
Switchable between water tank and direct water connection:
- Large water tank: The larger the tank, the less downtime in refilling.
- Water line connection: Easily switchable through the PID controls. Stainless steel hose & fitting are included.
Parts / Accessories Included:
- Portafilters: Single spout & dual spout. Both 58mm in diameter.
- Filter baskets: 1-cup, 2-cup, and blind for backflushing.
- Tamper: Simple 2-sided plastic.
- Scoop: Simple plastic one for ground coffee.
- Water line connection: Stainless steel braided hose & fitting.
Specifications
| Brand | Magister |
|---|---|
| Height (inches) | 15.25, approximate |
| Width (inches) | 11.75, approximate |
| Depth (inches) | 18.75, approximate |
| Weight (pounds) | 51 |
| Wattage (watts) | 20 amp required, 2020 watts stated on machine |
| Voltage (volts) | 110 – 120 |
| Coffee boiler capacity (liters) | 0.5 |
| Steam boiler capacity (liters) | 1.2 |
| Tank capacity (liters) | 3 |
| Approvals | CE |
- Coffee Boiler Priority Mode (110 Volts): Utilization of 640 watts
- Steam Boiler Priority Mode (110 Volts): Utilization of 1330 watts
- Boiler Priority NONE Mode (110 Volts): Disabled for 110 volt units
Notes
General Espresso Machine Notes/Warnings:
- Upon first use (tank/reservoir models): On the initial start-up (or after a long period of non-use), it is important to make sure the pump is removing water from the tank. When the machine is powered on, you will hear the pump running. After 5 seconds, squeeze the in-line hose in the tank (usually the longest hose, has a particle filter attached). if you hear a different sound, this means the pump is working correctly. If not, immediately power down the machine and contact us. For more information, visit this page General Manual Pump Priming.
- Electrical: To avoid electrical damage to this espresso machine which is not considered a manufacturer's defect, please acquire and install a single-outlet surge suppressor rated at 1080 joules or higher. Without the recommended surge suppressor, the espresso machine can be damaged at the power switch, the electronics, the heating element, the pressurstat, or the wiring inside. For more information, visit this page Power Protection.
- Water: To increase the useful life and not damage your espresso machine, please use softened water. Softened water is water without calcium and magnesium, but still has other minerals for espresso extraction. Do not use distilled, purified, or reverse osmosis water as these types of water create oxidation with the metals and cause the same damaging effects as limescale. For more information, visit this page Water Choice.
- Descaling: We do not recommend descaling unless there is an issue with the espresso machine. Too much descaling can eat away at the metals and gaskets inside an espresso machine. As a preventative measure, we recommend using softened water as explained in the bullet point above.
- Backflushing: This procedure of cleaning the grouphead will need to be performed from time to time. For more information, visit this page Espresso Machine Backflush – Why 50?
Blogs
Support
- Instruction Manual (REV.00)
Parts Diagram
- Parts Diagram (REV.04)
Reviews
Q&A
Ask a question
Please ask follow up questions as a new question. Submitted questions will be first reviewed, answered, and lastly publicized.
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How is the backflush done?
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How to backflush:
- Insert the blind filter in the portafilter.
- Lock the portafilter into the grouphead.
- Start the coffee delivery for about 10 seconds, stop, disengage the portafilter, and toss the dirty water.
- Repeat these steps several times.
For more detailed instructions, see Backflushing Instructions for Rotary Pump Espresso Machines.
How often should maintenance be done?
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Daily cleaning should be done at the end of each day of use.
Periodic cleaning/backflushing depends on usage. Weekly is a good practical recommendation.
What does Chapter 10 maintenance mean in practical terms?
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Q What does Chapter 10 maintenance mean in practical terms? answer nowAsked by on July 16, 2026 4:45 pmA
Daily maintenance means cleaning the machine body, portafilters, filters, drip tray, group shower, group gasket, and steam wand.
Periodic maintenance means washing the tank, cleaning the tank compartment, and performing a backflush with the blind filter.
What are the requirements for direct water connection?
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Q What are the requirements for direct water connection? answer nowAsked by on July 16, 2026 4:44 pmA
Use cold potable water, maximum pressure 6 bar, with a shut-off valve. The connection is G 3/8" female.
What does the water-source setting do?
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Water-source selects the water supply type:
- Tank / Serbatoio
- Mains /Rete
When it is set to Mains / Rete water, the tank-level sensor is disabled.
What is the factory password?
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The factory password is 14241. Or, if no password is set, 00000.
How should the technical menu be entered?
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Starting from Idle-Off, press and hold ENTER for more than 10 seconds. If password protection is enabled, the password screen will appear. If password protection is disabled, the technical menu opens directly.
Is there a language menu?
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Yes, the firmware shown in the video includes a language selection screen. The video shows English, Italian, and German.
Does the technical menu allow going back one step?
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The menu navigation is mainly forward using ENTER. There is no dedicated "back" function described. To exit, hold ONOFF for about 2 seconds to return to the normal Idle-On screen. To revisit a previous item, enter the menu again and advance to the desired point.
Which water filter brand should be used with the machine?
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Q Which water filter brand should be used with the machine? answer nowAsked by on July 15, 2026 12:37 pmA
The machine does not require one specific brand only. The correct filter or softener depends on the market, water hardness, and installation type. The important point is that the programmed liter threshold must match the real capacity of the filter or softening system being used. The easiest solution is to use a in tank water softener, such as the Bilt In Tank Rechargeable Water Softener / Particle Filter. This type of filter is recharged weekly and prior to first use, and replaced at a minimum every 6 months. Depending on water hardness, you many need to recharge and replace it more frequently.
Does the display value on the filter-liter counter, for example 2999 Lt, mean the filter capacity or the used liters?
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Q Does the display value on the filter-liter counter, for example 2999 Lt, mean the filter capacity...... Read moreAsked by on July 15, 2026 12:36 pmThere are no answers for this question yet. Answer now
When should the water filter be replaced?
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The filter should be replaced when the programmed liter threshold is reached, or earlier if the filter's supplier's instructions require it due to water hardness. For example, if the installed filter is rated for 3,000 liters under the local water conditions, the threshold can be set around 3,000 liters. If the water is very hard, the effective capacity may be lower.
Does the filter counter measure real filter efficiency?
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Q Does the filter counter measure real filter efficiency? answer nowAsked by on July 15, 2026 12:21 pmA
No, it is only a counter. It does not measure water hardness or the actual remaining efficiency of the filter. The filter replacement interval must be set according to the filter capacity, the water hardness, and the user's consumption.
What does the filter-liter counter count?
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The filter counter is the counter for the filter replacement. It count liters of water delivered since the last filter replacement/reset. On the dosed ES version, this is calculated through the volumetric counter. On the manual lever version, if this function is enabled in the firmware, it is calculated by time because there is no volumetric counter.
How is the maintenance counter reset?
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After maintenance is completed, the maintenance counter can be reset by holding the + and - buttons for approximately 5 seconds, until the value returns to 0.
What triggers the maintenance alarm?
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If the maintenance alarm is enabled and a maintenance-cycle value is programmed, the alarm appears when the programmed number of coffees/cycles has been reached. Setting the value to 0 disables the maintenance warning.
Is Service Cycle counted in liters or shots?
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It is counted in coffee/cycles, not liters. On the dosed version, the system can count single and double coffees/shots according to the programmed dose buttons. On the manual lever version, where the function is enabled, the cycle is based on the coffee activation, not on measured liters. On both, it will also count flashes to the system. Simply put - any time the 3/2 group valve is activated (manual or electric).
What does "Service Cycle" mean?
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Service Cycle refers to the maintenance cycle counter. It is not a liter counter. It is used to generate the maintenance reminder after a programmed number of coffees/cycles.
Should users change the PID parameters? What are the factory PID values?
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Q Should users change the PID parameters? What are the factory PID values? answer nowAsked by on July 13, 2026 2:28 pmA
No. These parameters are factory-tuned according to the boiler, heating element, dimensions, and heat dispersion. We do not recommend changing them unless Magister or Gicar provides specific instructions. The Factory presets shown in the Gicar specifications are:
Coffee boiler:
- Kp: 1.5
- Kd: 8.0
- Ki: 0.00
- Banda: 5
Steam/service boiler:
- Kp: 1.5
- Kd: 4.0
- Ki: 0.00
- Banda: 5
What does B / Kb mean? Is B/Kb an anti-windup parameter?
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Q What does B / Kb mean? Is B/Kb an anti-windup parameter? answer nowAsked by on July 13, 2026 2:04 pmA
In the Gicar specification this parameter is identified as "Banda", meaning PID control band.
It defines the operating band around the set temperature in which the PID regulation acts. In practical terms, it affects how the heating is modulated near the target temperature and therefore affects stability, overshoot, and recovery behavior. It is set for 5 degrees Celsius. A boiler set to 93, when starting from room temp will run at full power until 88 and then the PID modulation. The B /Kb anti-windup parameter for this controller, the correct identification from the Gicar specification is "Banda." Therefore we should explain it as PID control band, not anti-windup.
Why does the PID menu show Kp, then Kd, then Ki?
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This is simply the order chosen in the firmware display menu. It does not change the meaning of the PID parameters. The main reason Ki appears last is because it's set to 0. Ki is mostly aimed at fixing an error over time and in a small and fast reacting boiler, it will create an overshoot. It's more useful for a big steam boiler with heat exchangers and even there, it is very mildly used.
- Kp is the proportional parameter.
- Ki is the integral parameter.
- Kd is the derivative parameter.
Together they control the boiler heating response and temperature stability.
What are the heating element wattages?
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According to the Stella Dual Technical Data:
- 115 V: coffee boiler 700 W, steam boiler 1200 W
- 220 V: coffee boiler 640 W, steam boiler 1330 W
- 230 V: coffee boiler 700 W, steam boiler 1450 W
- 240 V: coffee boiler 760 W, steam boiler 1580 W
What if the machine shares the circuit with a grinder?
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Q What if the machine shares the circuit with a grinder? answer nowAsked by on July 9, 2026 3:51 pmA
If the machine and grinder operate on the same circuit and the combined load exceeds the circuit capacity, the breaker may trip. For best results, especially in commercial or heavy-use environments, a dedicated circuit is preferable.
Can the 115 V machine run on a 15 A circuit?
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As stated in the power value shown in the manual, the 115 V version as a maximum total power of 1320 W, which is approximately 11.5 A. Therefore, from a power consumption point of view, it is within a 15 A circuit. However, the installation must still respect the local electrical code, the plug type, the cable rating, grounding, and the rating plate.
Does the espresso machine need a 20 A dedicated circuit?
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Q Does the espresso machine need a 20 A dedicated circuit? answer nowAsked by on July 9, 2026 3:32 pmA
No. 15 A is enough for the machine itself, but since normal kitchens also serve a grinder, oven, refrigerator, etc. A full kitchen setup of 20 A is best, or a dedicated outlet of 15 A to the machine.
For example, according to the Stella Dual Technical Table:
- 115 V / 60 Hz version: max total 1320 W, about 11.5 A - under 15 A
- 220 V / 60 Hz version: max total 1450 W or 2090 W, depending on configuration - under 15 A
- 230 V / 50 Hz version: max total 1570 W or 2270 W, depending on configuration - under 15 A
- 240 V / 50-60 Hz version: max total 1700 W or 2460 W, depending on configuration - under 15 A
So "20 A" should not be stated as a universal requirement. The correct requirement must always follow the machine rating plate and the local electrical code.
When would steam boiler priority be useful?
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Steam boiler priority can be used for a user who steams a lot of milk and wants faster steam recovery. However for espresso quality and temperature stability, coffee priority is generally preferable.
What is the recommended heating priority?
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We recommend Coffee boiler priority for best espresso temperature stability. This is also the factory preset. For 110V machines, the only options are coffee first or steam first. Both together surpass the amp limitation of most kitchens.
Why are there two different priority menus?
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There are 2 different priority menus because they control two different things.
- The first priority menu controls hydraulic operation: coffee extraction vs steam boiler filling.
- The second priority menu controls electrical heating priority: coffee boiler heating vs steam boiler heating
What is the second priority menu?
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The second priority menu is for heating priority between the coffee boiler and the steam/service boiler. The available options are:
- Coffee boiler heating priority
- Steam boiler heating priority
- No priority / simultaneous heating
What is the recommended setting for the first priority menu?
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Q What is the recommended setting for the first priority menu? answer nowAsked by on July 7, 2026 2:19 pmA
We recommend Coffee Priority. This is also the factory preset. It gives priority to espresso extraction and avoids disturbing the coffee pressure/flow during steam boiler refill.
What is the first priority menu?
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The first priority menu concerns the relationship between coffee extraction and steam/service boiler filling. The available options are:
- Coffee priority - If coffee is being extracted, steam boiler filling is paused or postponed. This protects the espresso extraction from being affected by boiler refill demand. The pressure will drop when another orifice opens up. Coffee priority is the recommended setting for best espresso stability.
- Steam boiler filling priority - If the steam/service boiler is already filling, coffee extractions waits until filling is complete. However if coffee extraction is already in progress, the filling is postponed.
- No Priority / simultaneous - Coffee extraction and steam boiler filling may happen at the same time. This is not recommended. Other than disrupting the coffee extraction, cold water enters the steam boiler which is not likely to heat it immediately due to the heating priority setting, lowering the steam quality.
Why is there no timer-programming menu?
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Q Why is there no timer-programming menu?Asked by on July 7, 2026 1:55 pmThere are no answers for this question yet. Answer now
Is Crono connected to automatic startup or automatic shutdown?
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Q Is Crono connected to automatic startup or automatic shutdown? answer nowAsked by on July 6, 2026 1:07 pmA
No. There is no daily or weekly automatic on/off timer described for this function. Crono refers to the coffee extraction timer.
What is “Crono mode”?
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Crono mode is the shot timer / extraction timer display. It is not an automatic on/off timer for the machine. When Crono is enabled, the display shows the extraction time during coffee delivery and keeps it visible for a few seconds after the extraction ends. On the dosed ES version only (which is NOT this version of the machine), the display can also show the delivered volume. Here are images with and without Crono:







