DomoBar Super DB (Double Boiler) PID

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The Ultimate Home Barista Espresso Machine for the discerning coffeegeek.

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$ 3,699.00

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Price listed is subjected to GST.

CALL or EMAIL us for an appointment to see a machine demonstration and discussion. We are located at 49 Kampong Bahru Road Tel: 6226 1686. Our operating hours are from Mon to Sat 9.00am-6.00pm. Closed on Sun and public holidays. For map and directions, please CLICK

"Highlander Coffee Team, we just wanted to give you a big compliment on your service, the high standard of your products and the overall experience! Awesome job! Keep up the great work."
Mr Albert & Mrs Natalie Visscher (Singapore)

"Many thanks Phil we are really enjoying our coffee machine."
Ms Kate Catto (New Zealand)

"Phil, Many thanks for the excellent delivery and training on Saturday. The VBM is everything that we hoped it would be. The package that was delivered with the machine was well thought through and effective.  Your team did a great job."
Mr Louis Niven (New Zealand)

"Phil, Many thanks to Cedric for taking such good care of my DomoBar. It gave me great peace of mind that it was handled by someone who understands how to treat the machine. And to have it returned in even better condition than it left the old place was a bonus! Love the new big knobs and it has the new machine shine again. Thanks again. Cheers."
Ms Suzanne Roat, PhD, P.E. (U.S.A.)

La Vibiemme is based in Milan, and have an extensive history and credibility in the international market of manufacturing traditional espresso machines spanning over the past 40 years. The founder of Vibiemme was Mr Carlo Valente, also the founder of renowned FAEMA. The Faema espresso coffee machine’s heritage began in 1945 by Mr. Valente. By 1961 he had introduced the E61 model. The design and patent of the E61 group head was overseen by Mr Valente and is still the most commonly used system even after 40 years producing superior espresso coffee results. With the wonderful espresso machine history behind Vibiemme, it is no wonder that Vibiemme machines are not only beautifully designed but also mechanically and technically refined to deliver superior cup results. Vibiemme still holds the design patent for the E61 group head which is used in conjunction with the E64 group head on their models.

Vibiemme has worked diligently with importers, distributors, and industry professionals in the past year to upgrade their Double Boiler line. We are proud to announce some of the improvements on the new, redesigned, 2011 version 3 of the Vibiemme Double Boiler, including these....

TOP FEATURES that brings the Vibiemme Domobar Super Double Boiler espresso machine to the TOP!

  • Double boilers - the user can operate a coffee boiler and steam boiler independently of each other.
  • PID (Proportional, Integral, Derivative) allows user to manage temperature control of the coffee boiler . If you are not sure what PID is, here is an overview.
  • Small water reservoir at 1.2 liters allows approximetaly 20 double shots to be extracted without a refill - refill can occur on the fly while the machine is operating. For those who believe the small boiler makes better coffee because of fresh water displacement, we have a smaller reservoir for the same reason.
  • OPV (over pressure valve) feeds excess water pressure to the drip tray and not the water reservoir - this will allow operation of the direct water connection with having the reservoir fill with overflow water, get moldy, and require constant emptying and cleaning.
  • The drip tray can be drained manually or connected to a drain WITHOUT purchasing any optional kits (drain hose can be purchased at local hardward or plumber's supply).
  • Insulation on coffee and steam boilers helps save energy
  • Commercial-grade motor and rotary vane pump with ability to make a direct water connection or use a water reservoir on the same machine with the movement of a lever under the machine. Includes stainless steel braided hose with 3/8" male thread.
  • User programmed offset - the temperature regulation is at the coffee boiler and the grouphead always has a lower temp. Thsi feature allows the user to program this delta in temperature.

In addition to achieving optimal temperature stability, one of Vibiemme’s main goals when redesigning their double boiler machine was to keep the amperage requirement below the 13 amp mark - not only making it easier to find a connection in any household without needing a dedicated 20 amp circuit, but also to keep energy comsumption at a minimum. Thanks to an innovative method of controlling the percentage of power to the heating elements, Vibiemme’s Power Management Control System (PMCS) automatically regulates variable power to each heating element.

Quality Characteristics and Specifications found Vibiemme Style

  • Heavy duty true Vibiemme E61 grouphead maintains active flow of water from the grouphead to the heat exchanger in the boiler
  • Professional grade brass portafilters - one portafilter with single spout and single filter basket and one portafilter with dual spout and double filter basket
  • Coffee boiler capacity/material: 0.5 liter copper boiler
  • Steam boiler capacity/material: 1.9 liter copper boiler
  • Boiler pressure gauge to indicate steam boiler pressure. The setting can be varied by adjusting the pressurstat - please note the body panel has to be removed as there is a new international safety standard that Vibiemme has manufactured this machine under, and the standard requires that no access port be allowed for changing the pressurstat setting.
  • Pump pressure gauge to indicate brew pressure during espresso extraction (reading will vary while not extracting)
  • Multi-directional stainless steel steam wand on left side can be moved in different directions
  • Multi-directional stainless steel hot water wand on right side can be moved in different directions
  • Power indicator light on right side indicates when the machine is powered on
  • Heating light on left side indicates when espresso machine is heating
  • Low water level light in middle indicates when water level in water reservoir in rear is low
  • Three stage power switch allows user to operate espresso machine with coffee boiler only, with steam boiler only, OR with both boilers simultaneously (awaiting confirmation once shipment arrives)
  • Jaeger pressurstat monitors boiler pressure in steam boiler.
  • Extremely large stainless steel drip tray which can be easily (slides out with pull of handle) removed for cleaning. Grate stays on machine when pulling out drip tray so that it is one step removal to empty.
  • GICAR branded electronic water level control and reacts to a .02 of C of temperature change in the coffee boiler
  • Rotary vane pump and commercial-grade motor is quieter than a vibration pump, but it is more expensive to replace. hence, descaling is important
  • OPV (over pressure valve opens when too much pump pressure exists) located in rear of machine with easy access when body panel and six (6) associated screws and divider are removed. Although the pump has an adjustment screw for regulation, the OPV is an additional feature to manage overflow that may be caused by overpressure from the water company when the machine is plumbed in.
  • Accessories: Single spout portafilter, single dose filter basket, double spout portafilter, double dose filter basket, blind filter basket for backflushing, plastic coffee scoop, and a common useless plastic tamper (please make sure to order a good tamper)
  • One year parts warranty limited to manufacturer's defect handled by importer's service agent, and labor warranty handled by Highlander Coffee Pte Ltd
  • Water reservoir capacity: 1.2 liters (approximate)
  • Dimensions: 10.6" W x 21.0" D x 16.5" H (approximate)
  • Product Safety Listing: TBD
  • Electrical: 220 volts only, 2500 watts, 11 amp maximum needed
  • Shipping weight: ~32 kgs
  • Recommended maintenance: Backflush with detergent once every fifty extractions
  • Direct water connection requirement: connection must be made to a cold water supply line only.

    Notes:

    Technical Information:

    1 Domobar super Double Boiler technical details – 2011 version

    1.1 Coffee boiler technical details:

    The coffee boiler is situated vertically, and at the time of this writing, this is the smallest coffee boiler that we know of on a prosumer/commercial double boiler espresso machine - as with heat exchangers, less water standing water means superior cup profiles. After many months of testing, Vibiemme found this configuration (boiler size and wattage) to provide the optimal temperature stability with both scenarios: steam boiler on or steam boiler off.

    1.2 Steam boiler technical details:

    *Inside the horizontal steam boiler’s lower part where the water is located, there is a heat exchanger pipe which pre-heats water for the coffee boiler: water outlet temperature 97°C (208°F) for pressures higher than 1 bar. The pre-heating exchanger pipe is horizontal in the horizontal steam boiler to avoid any of the higher temperature steam transferred by the upper portion of the vertical steam boiler as found on other double boiler machines. In theory, the heat exchange pipe portion in the steam portion of a vertical steam boiler will turn into steam, and this can cause an unwanted variation in the temperature of the water to the coffee boiler when the machine has been idling too long.

    1.3 Electronic box and Gicar probe:

    1.4 PID Settings for Testing (and adjustable by user)::

    1.5  Fresh water supply configuration:

    The machine has a dual water-supply system. The user can use the internal water reservoir or connect to an existing water line (water softener recommended). Both options on the same machine utilize a rotary pump. A mechanical lever, located under the machine, allows the end-user to choose their inbound water supply.

    1.6  Waste-water drainage system

    The machine has a dual drainage system: the end-user can drain the waste water into the drip tray (and manually empty it out) or connect it directly to an existing drain system.

    2  Thermic stability trial of the  Domobar Super Double Boiler: tools, procedures and validation.

    Important Definition: What is thermic stability ?

    Thermic stability is the one of most important features on a PID double boiler espresso machine; it is the difference among the maximum temperatures recorded in a shot sequence.Differences between 2C° and 3C° have to be considered as acceptable, between 1C° and 2C° good, below 1C° excellent: these values create the thermic stability range, which depends on the manufacturing features of the machine.

  • 2.1 Tools:

    Thermic stability values can be detected through a measuring instrument for temperatures (SCACEII), placed at the group exit, following a world renowned testing pattern as outlined on the next section.

    2.2 Procedures: the trial was made referring to a world class and statndardized testing pattern

    Vibiemme Testing Table

    The test is made by recording the maximum temperatures of test points 1-14, respecting the idle intervals.
    The differences among the maximum temperatures recorded from test point 1 to test point 14 give as a result the values of the thermic stability range.

    2.3 Validation

    Besides checking the Domobar Super Double Boiler thermic stability values, the test aims to confirm the empirical model of the E61 group isothermy in an idle state, published on home-barista http://isotherm.blogspot.com/. This model states that when the idle Interval is longer than 2 minutes, the temperature difference between the red part (where the thermosiphonic circulation  takes place in an idle state) and the blue part ( the farthest and coldest part), is approx.  7 °F. This is the basic principle of the pre-shot, suggested to all users of E61 espresso coffee machines.

    3. DOMOBAR SUPER Double Boiler Version 3  - THERMIC STABILITY TEST RESULTS : Confirmation of the empirical on E61 grouphead isothermy and Domobar Super Double Boiler stability test’s report

    3.1 Confirmation of the empirical model on group E61 isothermy

    The thermic stability tests made on the Domobar Super Double Boiler confirm the isothermic model on group: the E61 group must be “taken to the right temperature” when the idle Interval is longer than 2 minutes.The temperature difference between Test Point 1-14 maximum temperatures and the thermic stability range (test point 6-14) is 7° F (without pre-shots).This data has to consider as a project feature of the E61 group, so the meaning of the thermic stability data has to take this feature into consideration.

    3.1 Domobar Super Double Boiler stability test’s report

    Domobar super Double Boiler stability range with steam boiler ON :1° C (1,5°-1,8° F)
    Domobar super Double Boiler stability range with steam boiler OFF :1° C (1,5°-1,8° F)

    4. DOMOBAR SUPER Double Boiler THERMIC STABILITY TEST: Consumptions and absorptions

    Maximum absorption with steam boiler ON: 1600 watts
    Maximum absorption with steam boiler OFF:  900 watts

    5. HOW DOES THE NEW DOMOBAR SUPER Double Boiler WORK?

    The Domobar Super Double Boiler can be used in different power configurations:

    Both configurations are available with:

    a)     Water fills through existing direct water connection or plumbed in line (a water softener is always recommended)
    b)     Water fills through water reservoir
    c)     Water drains into the drip tray
    d)     Water drain through existing drainage system

    In case of both boilers ON (thanks to coffee boiler water pre-heating function), thermic stability range of 1°C can be kept even on shots taken every 10 seconds with less wattage utilized within the coffee boiler. Vibiemme can finally state that the testing pattern was successfully passed with up to 900 watts absorption. In the case of the steam boiler OFF, thermic stability range of 1°C with varying watts absorption of up to 900 watts.

    The steam boiler performances are the same of the Domobar Super HX steam boiler - this is a vast improvement over the previous 2 versions. The double boiler version lower wattage is counterbalanced by the steam boiler insulation.
    1. We have decided to NOT offer no-burn steam wands because the typical internal diameter is about 50% less than a normal steam wand, and this usually affects performance times in steaming. In addition, the grouphead has a much greater area to get burned.
    2. When in direct connect mode, the wires under the reservoir will need to be reversed so the water reservoir does not have to be filled for use as a direct connect. We will have those instructions shortly after the units arrive.
    3. Coffee boiler: 0.5 liters
    4. Coffee boiler element: 900 watts total
    5. Thermic insulation by silicon glass
    6. Working temperature for testing: 93 C° (200 F)
    7. Safety Thermostat stops power at 110 C° (230 F)
    8. Steam boiler: 1.9 liters
    9. The steam boiler is placed horizontally
    10. Steam boiler element: 1,200 watts total
    11. Pre-heating exchanger for coffee boiler*: 45 ml ( approx. a double espresso)
    12. Thermic insulation by silicon glass
    13. Working Pressure: 1.2 bar
    14. Safety valve working max. pressure: 1.5 bar
    15. User controlled setting via front panel: 1°C  or 1°F
    16. Probe sensitivity: a tenth of C° or a tenth of F°
    17. Stainless steel probe in coffee boiler
    18. Temperature: 200°F
    19. P: 1.0
    20. I: 0.00
    21. D: 0.5
    22. Offset: 19°F
    23. The “Test point” corresponds to one shot of 50 ml double espresso brewed in 25 seconds.
    24. The “Idle Interval” is the time between one shot (end) and the beginning of the other.
    25. Steam boiler ON and Coffee boiler ON
    26. Steam boiler OFF and Coffee boiler ON