Caffeum Perfectus Minima Dual Boiler Espresso Machine

5 out of 5 based on 3 customer ratings
(3 customer reviews)

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Please note the drip trays on the Black and White models are stainless, not black or white.

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Review: Caffeum Perfectus Minima Espresso Machine by ACS
Overview: Caffeum Perfectus Minima Espresso Machine by ACS

Caffeum Perfectus Minima Dual Boiler Espresso Machine by ACS

Overview

1st-line normally does not carry sub-$2000 E61 dual boiler espresso machines because they are usually very lackluster in the steam department. Well, after seeing the Caffeum Perfectus Minima beginner dual boiler espresso machine in Rimini, Italy at the SIGEP trade show, we had two samples shipped in March of 2019. We were delighted to finally find a tank model, E61 grouphead espresso machine that could sell for under $2000 USD AND has some really powerful steam! In fact, we did not want the so-called no-burn steam wands because the steam power would be diminished! The Caffeum Perfectus Minima is proudly made in Italy.

  • Steam boiler safety valve is set at 2.5 bar
  • Max temperature is 255° Fahrenheit
  • OPV is set between 9-10 bar

Be one of the first to use the Minima, and we can assure you lots of steam power when compared to other sub-$2000 E61 espresso machines!

Dual boiler system
  • Simultaneously pull an espresso shot and steam milk – Steam is always readily available. Hence, there is no wait time going from coffee to steam mode. Works well if entertaining a small group of people.
  • Insulation with stainless steel boiler – The boiler is made of stainless steel which is less susceptible to limescale. Typically stainless steel boilers do not retain their heat as well as copper or brass boilers. This machine compensates that by being wrapped with insulation This helps with temperature stability for the espresso extraction and also helps save energy.
E61 grouphead
  • Pressure gauge from within – Gives a more accurate reading of brew pressure.
  • Consistent heating – Hot water circulates from the heat exchanger 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. With the heat exchanger/thermosyphon system, only fresh water from the water tank is used for the espresso extraction. The water in the heat exchanger flows to and from the grouphead.
PID control
  • The PID display is used for programming the temperature of both the coffee and steam boilers.
  • Shot timer from within – As soon as you start the espresso extraction, you can view the shot time  on the display screen
Vibratory pump
  • Profitable – Pumps will degrade in performance over time. Replacing a vibration pump will cost less than a rotary vane pump.
  • Effective – 41 watts, rated up to 15 bar with air valve bypass. You only need 9 bar to extract perfect espresso, and wattage has no correlation to longevity.
Tank / reservoir system
  • Automatic turn-off feature – Prevents burning out the heating element. The water tank sits on a spring-activated plate. Once the water is low, the plate depresses the tank microswitch which turns off the heating element.
  • Particle filter – Protects the machine from any unseen particles from entering the boiler. You can remove this filter if you are installing an inline water softener.
Steam & hot water wand
  • Multidirectional wands
  • 3 hole steam tip
  • Hot water wand that is non-insulated
  • Non-insulated steam wand goes faster throughout the steam.
Construction
  • Drip tray –  The coffee side has a drip tray extender if you are using small espresso cups.  The right side of the front body is angled back. This gives more space for frothing and reduces the chance of burning yourself being further away from the grouphead.
  • Body panel – Stainless steel that is polished to a mirrored finish. Some machines may have a white film which can and only should be removed after testing the Minima espresso machine with water
Accessories included
  • 2 Filter heads: 1 single spout & 1 dual spout; both measuring at 58 mm.
  • Filter baskets: A 1-cup that holds ~ 7 grams of ground coffee and a 2-cup that holds ~14 grams of coffee; both measuring at 58 mm.
  • Rubber insert: Made for backflushing the grouphead. Place this part into the 2-cup filter basket to turn it into a blind basket.
  • Grouphead gasket: Extra gasket that is normally replaced every 6 – 12 months, depending on the usage.
  • Padding: 2 sets of 4 pads for the feet.
  • Drip tray extender: For the purpose of using small espresso cups.
  • Instruction manual: Written in English.
Brand

Caffeum Perfectus

Height (inches)

15, approximate

Width (inches)

11, approximate

Depth (inches)

17.5, approximate

Weight (pounds)

49

Wattage (watts)

Coffee – 1000, Steam – 1200

Voltage (volts)

110 – 120

Boiler capacity (liters)

Coffee – 0.8, Steam – 2.3

Portafilter size (mm)

58

Tank capacity (liters)

2.6

Country of manufacture

Italy

Approvals

CE

Espresso Machine Warning:

  • ELECTRICAL WARNING: 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. the lack of 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.
  • WATER WARNING: To increase the useful life of and not damage your espresso machine, please use softened water. Softened water is water without calcium and without magnesium, but still has other minerals for espresso extraction. Do not use distilled water, purified water, nor reverse osmosis water as these types of water create oxidation with the metals and cause the same damaging effects as limescale.
  • DESCALING WARNING: We do not recommend descaling unless there is an issue with the espresso machine. The reason is that too much descaling can eat away at the metals and gaskets inside an espresso machine.

  1. We test this machine with water prior to shipping out. Your machine may arrive wet. Please let air dry for at least 24 hours prior to turning on.
  2. There can be a white film left over the stainless, depending upon what the manufacturer does. Please do not remove the film until you confirm the machine has arrived in good working condition and without damage.

Customer reviews

Rated 5 out of 5 stars
3 reviews
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3 reviews for Caffeum Perfectus Minima Dual Boiler Espresso Machine

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    Please ask follow up questions as a new question. Submitted questions will be first reviewed, answered, and lastly publicized.

      By any chance, do you have a guess for when the Caffeum Perfectus Minima (ideally in black but also stainless) will come back in stock?
    1. 0 votes
      Q By any chance, do you have a guess for when the Caffeum Perfectus Minima (ideally in black but al...... Read more
      Asked by John on May 5, 2021 12:46 pm
      There are no answers for this question yet. Answer now
    2. This issue has only happened about 3 times since I got the machine a few months ago. But I was wondering if there was any way to fix it from happening again. Sometimes when it is turned on it goes through the normal procedure. It heats up the brew boiler and grouphead to the set temperature then moves on the steam boiler. However, sometimes it will heat the steam boiler much higher than what the PID has it set to. For example, I might have it set to 125, but I will see that it is currently heated to 135 and still heating up. Eventually, it heats up so much that the overpressure valve in the steam boiler is released every 15 seconds or so to release the extra pressure caused by the heat. If I turn the machine off and on again it seems to resolve the problem so far. Like I said it only seems to happen maybe 1-2 times a month, but it is enough that I do not want to leave my machine alone while it heats up.
    3. 0 votes
      Q This issue has only happened about 3 times since I got the machine a few months ago. But I was wo...... Read more answer now
      Asked by Tyler on April 15, 2021 1:55 pm
      Answered by the admin Sorry to hear about this. It seems the PID sensor on the steam boiler needs to be cleaned with a wire brush. The machine will need to be cooled down and unplugged from the electrical outlet. Remove the top cover by removing the screws. On the larger boiler, there will be a PID sensor with two thin red wires (color can change in future). Please never twist nor pullthe wires as damage will occur and the boiler will not heat. Follow the double red thin wires to the black 2 pin connector and disconnect. Using a small crescent wrench, remove the PID sensor from the top of the boiler ALWAYS allowing the double red wire to spin freely and not twist or crimp. Wire brush the sensor even if it still looks clean as it could a thin film. Re-install and test.
    4. purchased an ACS Minima and later got this walnut kit on your recommendation: https://www.1st-line.com/buy/vibiemme-walnut-wood-kit-for-knobs-and-wood-portafilter-handle/ Can you help me understand how to remove the current knobs? Additionally, I noticed the handle does not fit on the portafilter that comes with the machine. Any recommendations on which one will fit?
    5. 0 votes
      Q purchased an ACS Minima and later got this walnut kit on your recommendation: https://www.1st-lin...... Read more answer now
      Asked by Alonso on March 31, 2021 2:30 pm
      Answered by the admin

      The knob covers need to be pushed out. Then there is most likely a nut inside that needs to be removed.

      As for the portafilter, manufacturers will not always tell us when they change the bolt size. Is the one we provided too small or too large on our bolt?

    6. Do you know when you'll be getting the Caffeum Perfectus Minima back in stock?
    7. 0 votes
      Q Do you know when you'll be getting the Caffeum Perfectus Minima back in stock? answer now
      Asked by Derek on March 31, 2021 12:50 pm
      Answered by the admin

      Yes. Unfortunately, there are many delays in Europe. However, the machines have left Italy. We just do not have an ETA because the ports in Italy are backed up.

    8. This looks like it would be the correct blind filter basket to order for the ACS Minima: https://www.1st-line.com/buy/universal-blind-portafilter-insert-58mm/
    9. 0 votes
      Q This looks like it would be the correct blind filter basket to order for the ACS Minima: https://...... Read more answer now
      Asked by Scott on March 10, 2021 6:41 pm
      Answered by the admin

      Yes.

    10. I ordered the Caffeum Perfectus Minima from here about a month ago and wanted to inquire about the drip tray. I noticed most of the posts on forums I see lately of the Minima, the drip trays tend to have the really cool "minima" laser engraving on the end of it. Mine came without this however. I know his may seem like a small detail, I really really prefer the look of the engraved minima on the drip tray :) . I've read online that this is due to later Minimas in production (2020 and onward) all having this engraving from the factory in Italy. Is there a way I could receive this more updated version of the drip tray? I could of course pay to send my current one back if need be, thank you, and have a great day!
    11. 0 votes
      Q I ordered the Caffeum Perfectus Minima from here about a month ago and wanted to inquire about th...... Read more answer now
      Asked by Ariq on February 26, 2021 6:27 pm
      Answered by the admin

      Sorry, these engraved drip trays are currently not available. The pricing will increase on the new batch coming in as this is part of the cost increase.

    12. I'm interested in purchasing this walnut wood kit: https://www.1st-line.com/buy/vibiemme-walnut-wood-kit-for-knobs-and-wood-portafilter-handle/ What parts do I need to purchase. I noticed there are a few options.
    13. 0 votes
      Q I'm interested in purchasing this walnut wood kit: https://www.1st-line.com/buy/vibiemme-walnut-w...... Read more answer now
      Asked by Alonso on February 1, 2021 5:24 pm
      Answered by the admin

      Pretty much all of them, except maybe the screws, are needed.

    14. I've received and been enjoying my new Minima espresso machine. I have one quick question, the product listing for Minima stated that the machine come with a 3-hole steam tip. The machine I received have a 2-hole steam tip instead. Is that something that had been changed by the manufacturer? Is it still possible to get a 3 hole steam tip for faster steaming?
    15. 0 votes
      Q I've received and been enjoying my new Minima espresso machine. I have one quick question, the pr...... Read more answer now
      Asked by Johnny on December 29, 2020 5:41 pm
      Answered by the admin

      Sorry, they must have changed this without notification. This is why we put this statement on our web site. In addition, they do not sell their steam tip separate from the wand.

      If you want, we can take one off of our demo, but you would need to send the 2 hole to us so we can put it on our demo machine. One of our complaints was that the steam tip could never be fully placed over the drip tray when bleeding. So, if you decide to switch, you will have this issue.

    16. Was wondering if anyone has reported temperature issues with the newest batch of minimas yet? I haven't used the steam boiler too much yet, but twice so far it seems like the heating element doesn't turn off when it hits the target temp. Today I had it set to 257f and I heard the safety valve pop open. Went to go check on it and the screen was showing 290f.
    17. 0 votes
      Q Was wondering if anyone has reported temperature issues with the newest batch of minimas yet? I h...... Read more answer now
      Asked by chris on December 29, 2020 5:07 pm
      Answered by the admin

      There is a probability there may be an offset in the inner programming, which is off.

    18. Can you do a video showing the complete internals of the machine. I always enjoy those videos you usually do for these machines. Also are the steam and brew boiler both stainless steel. Is the water going into the brew boiler pre heated through the steam boiler first.
    19. 0 votes
      Q Can you do a video showing the complete internals of the machine. I always enjoy those videos you...... Read more answer now
      Asked by Jason Casale on December 27, 2020 9:21 pm
      Answered by the admin

      Thanks. There are so many videos to make, so some day, one will be done.

      At this time, both boilers are stainless. From what we see, there is no pre-heat of the water for the coffee boiler from the steam boiler.

    20. just received an ACS Minima from you guys and it is working great. I want to add wooden knobs to it, and was wondering if you had any that are compatible. It seems like the knobs are screw in (like the Lelits) but I'm too nervous to take it apart. Also the gasket seems way too thick, the portafilter wont even latch in. Is there a very thin one you recommend or should I leave it as is?
    21. 0 votes
      Q just received an ACS Minima from you guys and it is working great. I want to add wooden knobs to ...... Read more answer now
      Asked by Chris on December 22, 2020 6:01 pm
      A https://www.1st-line.com/buy/vibiemme-walnut-wood-kit-for-knobs-and-wood-portafilter-handle/ Just pay mind to how many of each piece you will need for the Minima.
    22. Most coffee sites suggest doing a espresso extraction in 25-30 seconds. The manual for this machine says it is longer. Is that due to the group head being modified for the solenoid valve and thus taking longer to fill up? If so, is the user manual the correct amount of time. This would be easier for me if I had a previous machine with the e61 group head and lever, but I have never owned one of those.
    23. 0 votes
      Q Most coffee sites suggest doing a espresso extraction in 25-30 seconds. The manual for this machi...... Read more answer now
      Asked by dave on December 10, 2020 2:06 pm
      Answered by the admin

      Timing of extraction is of an opinion, as it depends upon your taste and the beans used.

    24. Which tank water softener would fit this machine?
    25. 0 votes
      Q Which tank water softener would fit this machine? answer now
      Asked by Max on November 19, 2020 2:15 am
      Answered by the admin

      V725 is the best option.

    26. I purchased the Caffum perfectus dual boiler machine back in May. Yesterday the circuit tripped while I was waiting for the machine to heat up. When I inspected the unit it appears water is leaking out the top of the pressure relief valve of the steam boiler. I pushed down on the top to wipe it off and it appears it has stopped for now. This is concerning and I would like to know what I should do a this point. This doesn’t seem normal
    27. 0 votes
      Q I purchased the Caffum perfectus dual boiler machine back in May. Yesterday the circuit tripped w...... Read more answer now
      Asked by Frank on July 27, 2020 5:50 pm
      Answered by the admin

      This happens when the water is too pure. We have more information on this topic.

    28. I received the ACS Minima from you guys about a week ago and so far I've absolutely loved it! I have a quick question about the steam wand, though- it's still doing fine with regards to steam pressure, but it's not staying in place very well. After it warmed up a couple of times, the ball joint holding it in place has failed to prevent it from basically drooping forward regardless of where I position it. Do you have any guidance/recommendations on how I might fix the problem? I considered tightening the bolt in which the ball joint sits but it's already pretty tightened down and I didn't want to risk the finish by putting a lot of torque on it...
    29. 0 votes
      Q I received the ACS Minima from you guys about a week ago and so far I've absolutely loved it! I h...... Read more answer now
      Asked by Scott on June 9, 2020 4:28 pm
      Answered by the admin

      Sorry to hear about this.  Please note that these wands are a little heavier than the standard wands, so it may move by itself a little. We also add a little food grade grease to the ball joint when we test to make the gasket last longer.

      You can try about 1/8th of a turn on the nut.

    30. Is the e61 grouphead on this machine compatible with 3rd party flow control kits?
    31. 0 votes
      Q Is the e61 grouphead on this machine compatible with 3rd party flow control kits? answer now
      Asked by Thomas Gappmayer on April 15, 2020 9:55 pm
      Answered by the admin

      We will test our flow control device kit i the near future. Sorry, we can not confirm if kits by others will fit.

    32. I have a pre production Minima. I understand the production models came with an improved Expansion or OPV valve. This shows as part number MIN0024 on the Parts Diagram. Can you provide this part or a compatible OPV. I ordered the Ascaso Expansion Valve from 1st Line. It looks great but is physically larger and has a larger inlet than the valve in my Minima. I may be able to adapt it but would get the "proper" valve if it was available. I posted a similar question in a different location on your site before discovering the Minima Parts Diagram. Thanks.
    33. 0 votes
      Q I have a pre production Minima. I understand the production models came with an improved Expansio...... Read more answer now
      Asked by Louis Pugh on March 30, 2020 10:37 pm
      Answered by the admin

      This would be difficult to determine since the pre-production model may have a different boiler or a different sized connection than the ones we sell. Your purchase of the Ascaso one just proves our point that this inquiry is not as easy as one thinks to answer.

      Unfortunately, we are unsure at this time. We did forward your inquiry to ACS. However, since Italy is closed due to the Coronavirus, you may want to contact the person or company you purchased the pre-production machine from as they ultimately should support your inquiry and know the specifications. Once we hear from ACS, we will update our answer here.

    34. I'm looking for a bottomless portafilter for my Minima and wanted to reach out to make sure I am picking one that fits the machine.
    35. 0 votes
      Q I'm looking for a bottomless portafilter for my Minima and wanted to reach out to make sure I am ...... Read more answer now
      Asked by Gabe on January 24, 2020 8:01 pm
      Answered by the admin

      This bottomless/naked portafilter fits best on the Minima!

    36. Is the machine set to heat up sequentially the brew boiler first? I see in the user manual that there's an ability to set it to sequentially heat up the boilers so it can work on 15amp outlets. Just want to confirm which number I should select for that setting, and if it's something that is preset out-of-the-box.
    37. 0 votes
      Q Is the machine set to heat up sequentially the brew boiler first? I see in the user manual that t...... Read more answer now
      Asked by gghky on January 20, 2020 11:29 pm
      Answered by the admin

      From our experience, it heats up the coffee boiler first with priority, then the steam boiler. This is the only way to make it work at 15 amps at 110-120 volts.

    38. How long does it take to come up to temp for brewing and steaming?
    39. 0 votes
      Q How long does it take to come up to temp for brewing and steaming? answer now
      Asked by Bob on July 22, 2019 12:53 am
      Answered by the admin

      At 110-124 volts, it takes the coffee boiler about 20-25 minutes under room temperature of 60-70 degrees F, and the steam boiler an additional 25-30 minutes.

    40. Can I set the steam boiler to around 175 F for americano's?
    41. 0 votes
      Q Can I set the steam boiler to around 175 F for americano's? answer now
      Asked by Bob on July 22, 2019 12:06 am
      Answered by the admin

      The steam boiler needs steam pressure to push the water on the bottom of the steam boiler through the hot water valve and wand. Hence, the steam boiler needs to be set at 212 degrees F or higher.

      In Italy, the hot water valve was created to rinse the portafilter, and not for Americano beverages as North Amercian customers have adapted. Although it can be done on the minima espresso machine, we suggest only remove 4 ounces of water from the hot water valve, then allow the steam boiler to refill before removing another 4 ounces of hot water. This is because if the water level drops too fast on the steam boiler, the steam boiler heating element can get damaged from lack of water. This applies to all HX and double boiler espresso machines with boilers smaller than 4 liters.

    42. I note that the wattage is 2200 and I assume that is with both heating elements active (and maybe the pump). The question section on your site says a 15 amp circuit "should" work. Have you tried the machine on a 15 amp circuit. I'm not an electrician but the math doesn't seem to work. 2200/110=20 amps or 2200/120=18.33 amps. I don't want to buy it and pop the breaker as soon as I turn it on. Thanks for your help.
    43. 0 votes
      Q I note that the wattage is 2200 and I assume that is with both heating elements active (and maybe...... Read more answer now
      Asked by Bob Gassie on July 11, 2019 9:40 pm
      Answered by the admin

      Sorry, on new machines, the programmers sometimes forget to ask the technicians about the electrical.

      The coffee boiler is 1000 watts. The steam boiler is 1200 watts. The 110 volt current alternates between the two boilers, but not to both at the same time. This allows 15 amp service with minimum 110 volts up to 124 volts out of the outlet with a 15 amp circuit breaker.

      We usually say 'should work" because we are not at every remote location to check the amperage rating of the circuit breaker, the age and type of wiring behind the wall, nor the actually voltage coming through the circuit. For examples, some very old homes have may have a 15 amp circuit breaker, but less than 110 volts at the outlet. If the volts are too low for any particular reasons, no 15 amp espresso machine will work correctly and/or potentially cut the circuit breaker. In other words, we have to try to think of every scenario, because there is always that one machine in one customer's home where it will not work... So, we say 'should work"....

      We asked the programmer to correct the web site with greater detail.

    44. Does this need a 15A circuit or a 20A?
    45. 0 votes
      Q Does this need a 15A circuit or a 20A? answer now
      Asked by Dave on June 15, 2019 4:07 am
      Answered by the admin

      15 amps should be sufficient if a dedicated outlet. 20 amps will work better if a grinder is on the same outlet.

    46. Does this machine able to perform pre-infusion like the rest of E61 brew group does?
    47. 0 votes
      Q Does this machine able to perform pre-infusion like the rest of E61 brew group does? answer now
      Asked by Teng on May 24, 2019 12:44 pm
      Answered by the admin

      Sorry for the delay as we had to confirm with the manufacturer. They responded,

      "This machine is equipped with a vibration pump that is more gentle compared with a rotary pump. Basically, the E61 not have a real preinfusion chamber, but have like an expansion valve that operates at around 5 bars to avoid the shock of the 9 bars that the rotary pump push from the beginning.

      The vibration pump have a short ramp up of pressure and also the volume of water in the same time is lower so the puck not suffer."

    48. Does this machine allow switching on and off the steam boiler independently from the rest of the machine?
    49. 0 votes
      Q Does this machine allow switching on and off the steam boiler independently from the rest of the ...... Read more answer now
      Asked by Pascal Golay on April 19, 2019 10:57 pm
      Answered by the admin

      Not really. There is a three stage switch - off, coffee boiler power on only, and coffee and steam boiler both power on.

      Hence, the steam boiler can not be powered on by itself.

      A I don’t think that is correct, I think you can switch the steam boiler off. See the review here: https://coffeeequipmentreviews.wordpress.com/2019/03/06/acs-minima-final-production-machine/
      Answered by the admin

      There are two switches on the front panel on the Minima espresso machine. The top switch is to start and stop the espresso extraction. The lower switch for power has three positions:

      Top - Power on coffee boiler only
      Center - Power completely off
      Bottom - Power to BOTH boilers.

      Unless we are missing something here, the steam boiler can NOT be turned on INDEPENDENTLY of the coffee boiler. Please review picture below.

      Switches on Caffeum Perfectus Minima Espresso Machine

      A Hi all - thanks - that answers my question - it is not 100% independent but what I am interested in is the ability to shut off the steam boiler, which is possible - sorry -I was not clear in phrasing my question.

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