La Marzocco MAN.32.1 Strada Commercial Espresso Machines User Manual

La Marzocco MAN.32.1 Strada Commercial Espresso Machines User Manual

certifications available:

Via La Torre 14/H
Località La Torre
50038 Scarperia e San Piero
(Firenze) – ITALIA
www.lamarzocco.com
info@lamarzocco.com
T: +39 055 849 191
F: +39 055 849 1990
Original instructions verified by the manufacturer.

Scan QR Code to view the complete
Software Programming Guide available on the techcenter website.
Printed on recycled paper.

WARNING
This appliance is for professional use only and should be installed in locations where its use and maintenance is restriced to trained personnel. Children are forbidden to operate or play with the appliance.

WARNING
The appliance must be placed in a horizontal position on a counter higher than 80 cm from the ground.

WARNING
This appliance is not suitable for outdoor use. Jets of water should not be used to clean the appliance, nor should it be placed where water jets are used.

CAUTION
As already mentioned in the preceding notes, the manufacturer shall not be held responsible for damage to objects, animals and/or people whenever the appliance has not been installed according to the instructions contained in this manual, and is not used to do what it was designed for (i.e. preparing coffee and hot drinks).

1) Important safeguards

• Appliance weighted sound pressure level is lower than 70 dBA.
• Use, cleaning and maintenance of this appliance can be carried out by people (including children more than 8 years of age) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, as long as they have been given supervision or instructions concerning its use by a person responsible for their safety and if they understand related dangers.
• Children should be supervised to ensure that they do not play with the appliance.
• Keep the appliance and its cord out of the reach of children less than 8 years of age.

2. This operating manual is an integral and essential part of the product and must be supplied to users.
   Users are asked to read the enclosed warnings andcautions carefully, as they provide valuable information concerning safety during installation, operation and maintenance. This manual must be kept in a safe place and be available for consultation to new and experienced users alike.

3. Ensure product’s integrity by inspecting the packaging, making sure it presents no signs of damage which might have affected the enclosed appliance.

4. Check appliance integrity after having carefully removed the packaging.
   Note: In case of doubt, do not go on any further and contact your dealer or retailer immediately. They will send out specialized personnel authorized to perform service on the appliance.

5. Packaging (boxes, plastic bags, foam parts and whatever else) must not be left around within easy reach of children, due to the potential danger it represents, nor be discarded in the environment.

6. Check to see that data on the rating plate correspond to those of the main electrical supply which the appliance will be hooked up to.

7. The equipment must be installed to comply with applicable federal, state or local electrical and plumbing codes. Installation also must comply with manufacturer’s instructions, and must be performed by qualified and authorized personnel.

8. Incorrect installation may cause injury/damages to people, animals or objects for which the manufacturer shall not be held responsible.

9. Safe electrical operation of this device will be achieved only when connection to the power outlet has been completed correctly and in observance of all local, national, and international electrical codes and safety regulations, and particularly by grounding the unit. Make sure grounding has been done properly as it represents a fundamental safety requirement. Ensure qualified personnel check such connection.

10. Furthermore, you must ensure that the capacity of available electrical system is suitable for the maximum power consumption indicated on the appliance.

11. We do not recommend using adapters, multiple plugs and/or extension cords.
    If you cannot avoid using them, make sure that they are exclusively of the kind which conforms to local, national, and international electrical codes and safety regulations, thus being careful not to exceed power and current ratings indicated on such adapters and extension cords.

12. This device must be used exclusively for the functions it has been designed and built for. Any other application is inappropriate and dangerous.
    The manufacturer shall not be held responsible for any damages caused by improper and/or irrational use.
    This appliance should not be installed in kitchens.

13. Using any electrical device requires that certain fundamental rules be observed. In particular:
    • do not touch the appliance with wet or humid hands and feet;
    • do not use the appliance while having no shoes on your feet;
    • do not use extension cords in bath or shower rooms;
    • do not unplug the appliance from power outlet by pulling on power supply cable;
    • do not expose the appliance to atmospheric agents (rain, sun, etc.);
    • do not allow children or untrained people to use this appliance;
    • do not clean control panel with a wet cloth since it is not watertight.

14. Before carrying out any maintenance and/or cleaning operations, turn the main switch, which is located on the front left of the appliance, to the “0” or “OFF” position, and disconnect the appliance from electrical network by unplugging the cord or by switching off the relevant circuit breaker. For any cleaning operation, follow exclusively the instructions included in this manual.

15. In case the appliance is operating in a faulty manner or breaks down, disconnect it from electrical network (as described in the preceding point) and close water supply valve. Do not attempt to repair it. Contact a qualified and authorized professional to perform any repair. Repairs must be performed exclusively by the manufacturer or by an authorized centre using only original parts. Noncompliance with the above could compromise appliance safe operation.

16. During installation, you should plan to make use of an omnipolar connector, as required by local, national, and international electrical codes and regulations.

17. In order to avoid dangerous overheating problems, it is recommended that the power supply cable be fully unfurled.

18. Do not obstruct air intake and exhaust grilles and, in particular, do not cover the cup warmer tray with cloths or other items.

19. Appliance power supply cable must not be replaced by users. In case power supply cable becomes damaged, shut off the appliance and disconnect it from the electrical network by switching off the relevant circuit breaker and close off the water supply; in order to replace the power supply cord, contact qualified professionals exclusively.

20. These instructions are also available in an alternative format on a website: http://techcenter.lamarzocco.com.

21. The appliance should be placed on a flat counter and in settings with the following temperatures:
    – Minimum room temperature: 5°C/41°F;
    – Maximum room temperature: 32°C/89°F.

22. Check your package to make sure that the following accessories are included:
    • a number of 1-dose and 2-dose portafilters according to the number of groups;
    • replacement 1-dose and 2-dose filter baskets
    • 1 tamper
    • 1 blind filter
    • cleaning detergent, for the groups
    • 3 stainless steel braided hoses for water connections
    • 1.5 m of reinforced plastic tubing for drainage
    • 1 hose clamp

23. If the appliance has been temporarily housed in settings with a room temperature of less than 0°C/32°F, it must be placed in a warmer environment in order to allow hydraulic system gradual defrosting prior to use.

24. Water pressure supply must be between 0.4 and 0.8 MPa.
    The maximum inlet water pressure shall be at least 1.0 MPa (Denmark, Norway, Sweden, Finland).

25. This appliance is intended to be permanently connected to fixed wiring, and it is mandatory that a residual current device (RCD) with a rated residual operating current not exceeding 30 mA is installed.

26. This appliance is designed only for preparing coffee and hot drinks.

27. Any modification to the equipment is prohibited; the manufacturer cannot be held liable for damage to property, animals, and/ or persons if the equipment undergoes technical
    and aesthetic changes, changes in performance and characteristics, and in general is tampered with in one or more of its constituent components.

28. Minimum requirements for WiFi connection:
    • device running Android version 6+ or iOS version 10+;

• wireless network 2.4 GHz;
• La Marzocco app available at the official stores Play Store and App Store.

29. Common Dimensions, Weights, and Features

2. Definition of Available Models

This operating manual refers exclusively to the following models, of our own manufacture:
STRADA, model S with 2 and 3 groups

1) General Description
The machine is built in 2 and 3 coffee group versions and is essentially composed of the following parts:
• Steam Boiler (produces steam and hot water);
• Coffee (“saturated”) boiler;
• Brewing groups;
• Exterior Cover;
• Water pump.

2) Description of the various parts
• Steam Boiler
The Steam Boiler consists of a cylindrical tank, of varying length according to the number of coffee groups, which is made of AISI 300 series stainless steel. Each unit is subjected to a hydraulic test, at a pressure of 6 bar, and has an operating pressure of 1.3-1.5 bar. The following is a list of effective volumes and power ratings according to the number of groups installed:

2 groups 8,2 liters 3000 Watts
3 groups 11,8 liters 4000 Watts

Covers are welded at either end of the cylindrical tank and on one of them there is a housing for the water heating element, which allows the steam boiler to reach operating pressure within approximately 25 minutes. Operating pressure is maintained by temperature probe and PID controller.
The steam boiler has various fittings used for safety devices, for supplying hot water and steam, and for the heating element.

Composed of AISI 300 series stainless steel tube. Heating is accomplished through an immersion-type plated heating element.

• Operating pressure of 1.3-1.5 bar, controlled automatically through a pressure switch or a temperature probe, adjusted to open the heating element supply circuit at 1.5 bar and close it at 1.3 bar.
• The pressure is displayed by means of a pressure gauge with a scale of 0 to 2 bar.
• Safety device, based on an expansion type mechanical valve, with counteracting spring adjusted to 1.8 bar.
• Testing: hydraulic test at 4.5 bar performed on ready-to-use small boilers, at our factory.

• Coffee Boiler
The Coffee Boiler consists of a cylindrical tank made of AISI 300 series stainless steel. One each group (hot water generator for brewing coffee).

Each unit is subject to a hydraulic test, at a pressure of 18 bar, and has an operating pressure of 9 bar. The following is a list of effective volume and power ratings according to the number of groups installed:

2 groups 2 x 1,3 liters 2 x 800 Watts
3 groups 3 x 1,3 liters 3 x 800 Watts

Covers are installed at either end of the cylindrical tank and on one of them there is housing for the water heating elements.

The temperature of the coffee boiler is maintained by an electronic temperature controller (PID capable) with an accuracy of 0.2°C. The brewing groups are installed on the boiler.

Composed of an AISI 300 series stainless steel tube. Heating is accomplished through an immersion-type plated heating element.

• Operating temperature 95°C (adjustable), controlled automatically by an electronic temperature controller with an accuracy of 0.2 °C. Operating pressure of 9 bar.
• Pressure is displayed through a pressure gauge with a scale from 0 to 18 bar.
• Safety device, based on an expansion type mechanical valve, with ounteracting spring adjusted to 13 bar.
• Testing: Hydraulic test at 18 bar performed on ready-to-use small boilers, at our factory.

• Brewing groups
They consist of a precision casting made of stainless steel. The brewing groupaccepts the portafilter used to hold the ground coffee; the espresso flows through the brewing group, through the portafilter basket, through the portafilter spout, and into the cup(s) after the brewing button has been pressed.

• Exterior cover
The exterior consists of painted and stainless sheet steel panels. To provide good aesthetics, to optimize ergonometrics for the operator and to reduce the chance of damage to a minimum.

• Water pump
The rotary vane pump, is installed on the water supply tubing and is set up to operate anytime the coffee groups are activated, and through an autofill system whenever the water boiler needs to be replenished.

• Water sensor (if present)
The probe that analyses the water entering the machine (AQUATOP) performs a very precise reading of the TDS and total hardness.

However, if a water softener with salt regeneration (Na + ion cationic resins) is installed upstream from the machine, this reading is not as reliable and precise.

In this case, we recommend you to consult your local technician for questions regarding water treatment.

• FCC certification (U.S.A. and CANADA only)
The espresso machine is equipped with a dedicated radio module that meets FCC and ISED certification requirements.
FCC ID: 2AZUJ-SYS-C60-LMC1
IC ID: 27093-SYSC60LMC1

Ethernet port is used for firmware updates and it is used only in production at LA MARZOCCO.

WARNING
The machine is intended to be permanently connected to fixed wiring, and it is mandatory that a residual current device (RCD) with a rated residual operating current not exceeding 30mA is installed.

WARNING
The Coffee Boiler and Steam Boiler contain water at elevated temperature. Water temperature over 125°F / 52°C can cause severe burns instantly or death from scalding (Coffee Boiler 207°F/97°C – Steam Boiler 256°F / 124°C)

WARNING
Replace fuses with the same size, type and rating. e.g. F1 = 2A, 250V

Note:

• The drinking water mains valve and the circuit breakers for the electrical system need to be located in the most convenient position for the operator to access them easily and quickly.
• This machine complies with the standard 61000-3-11, the impedance at the supply interface must be Zmax= 0.356 Ω.

1) Installation guide
For best results, STRADA needs a minimum flow of water in input of 100 l/h and a pressure of 2.5 bar.
Installations that do not meet these requirements will cause a shorter life of the pump and may cause a high noise level during coffee brewing.

If the pressure and flow are not adequate, air bubbles may develop within the gears.

This is called cavitation. Cavitation can impair the performance of the espresso machine.

If the incoming water of the espresso machine falls outside the recommended parameters, it is necessary to carry out one of the following installations:

Pressure lower than 9 bar Flow rate lower than 100 l/h
Installation with the rotary pump immediately after the water treatment system, upstream of the tee.

Pressure higher than 9 bar
Flow rate lower than 100 l/h
Installation of the pressure reducer immediately after the water treatment system, upstream of the rotary pump.

Installation of the rotary pump (set to 9 bar) immediately after the pressure reducer, upstream of the tee.

2) Accessories
In order to proceed with installation, it is necessary that the following are available:
• Pipes carrying drinking water with a 3/8”G (BSP) end connection; (3/8” Compression for USA and Canada)
• Electrical Supply according to the specification of the espresso machine purchased:
• Single/Three phase 220VAC – 50/60 Hz electrical connection with ground, protected socket and approved interlock switch
• Single phase 200VAC – 50/60 Hz electrical connection with ground, protected socket and approved interlock switch
• Three-phase, 380VAC – 50 Hz electrical connection with neutral + ground, near the bench on which the machine is installed and terminating in a suitable protected fivepole socket equipped with an approved interlock switch
• Waste water drain system.

3) Water test kit
In order to enable you to check if your water supply is within the suggested ranges, La Marzocco machines will be equipped with two units of a quick water test kit (see image below) including 6 test-strips and instruction cards.

The parameters that you can measure are Total Hardness, Total Iron, Free Chlorine, Total Chlorine, pH & Total Alkalinity, Chlorides.

Ideally, you should perform a test on the water BEFORE the water treatment system and again AFTER the water system in order to verify if this is actually matching our suggested ranges.

Once the test has been performed, learn which treatment system is most appropriate for your particular water supply by filling out the online water calculator on our website: LA
MARZOCCO WATER CALCULATOR (http://www.lamarzocco.com/water_calculator/).

4) Flowmeter safety removal
Before switch on, remove the clamp from the flowmeter located inside the machine, as indicated by the adhesive label applied on the main switch. Also remove the label from the main switch.

5) Water supply connection
In order to connect the machine up to the water mains proceed according to the indications given in the chapter about Installation and in compliance with any local/national safety standards of the location in which the machine is being installed.

The equipment is to be installed with adequate backflow protection to comply with applicable federal, state, and local codes.

To guarantee a correct and safe functioning of the machine and to maintain an adequate performance level and a high quality of the beverages being brewed it is important that the incoming water be of a hardness greater than 7°f (70ppm, 4°d) and less than 10°f (100ppm, 6°d), pH should be between 6.5 and 8.5 and the quantity of chlorides be less than 30mg/l . Respecting these values allows the machine to operate at maximum efficiency. If these parameters are not present, a specific filtration device should be installed, while always adhering to the local national standards in place regarding potable water.

Then connect the inlet of the water filter/ softener (if present) to the drinking water supply using one of the supplied stainless steel braided hoses. Before connecting the filter to the water pump, flush the water supply line and the filtration system in order to eliminate any residual particles which could otherwise get stuck in taps or valves thus preventing them from working properly. Connect the water supply connection of the espresso machine to the water pump outlet using one of the supplied stainless steel braided hoses.

Then connect the water pump inlet to the water filter/softener outlet (if present).

Note: The water pump is a differential pressure volumetric pump and has been designed to be used exclusively with cold water. Make sure that water is always present while the pump is operating, otherwise air can be introduced into the brew boiler causing an undesireable condition and the pump can be damaged.

6) Electrical connections
a) Power supply cord
• This is the main power supply cable that provides power to the entire espresso machine. There are different types of cable based upon the electrical requirements of the espresso machine purchased:
• 200/220VAC 1 Phase 3-core cable with 4/6/10mm2 cross section or AWG 12/10/8 for 2,3 4 group versions, secured to espresso machine via a strain relief connector
• 220VAC 3 Phase 4-core cable with 4 mm2 cross section for 2 , 3 and 4 group versions, secured to espresso machine via a strain relief connector
• 380 VAC 3 Phase 5-core cable with 2.5mm2 cross section for 2, 3 and 4 group versions, secured to espresso machine via a strain relief connector.

b) Water pump motor power cord
This is the power supply for the water pump motor. The internal electronics will switch the pump motor on when needed.
• 3-core cable with 1.5 mm2 cross section or 3-core AWG 16 (for UL version) secured to espresso machine via a strain relief connector.
c) Quick connection between the water pump and the espresso coffee machine
The electrical connection must be made through the use of the connectors, as shown in the following figures:

7) Waste water drain connection
The espresso machine drain is to be connected by means of the included reinforced plastic tubing. Connect one end of the reinforced plastic tubing to the drain  hose connection on the left side of the espresso machine, secure with included hose clamp. Connect the other end to a suitable waste water collection system. In case such a system is not available, drained liquids may be collected in a suitable bucket and any necessary drain pipe extensions shall be made using steel-lined PVC tubing and suitable hose clamps.

Water specifications table

N.B.: Test water quality (the warranty is void if water parameters are not within the range specified in the section “installation”)

4. Machine Operation and Coffee Preparation

CAUTION
Never remove the filter holder when water is being delivered.

This operation can be extremely dangerous since the high pressure built-up inside the blind filter would spray out hot and slightly caustic water, which may cause severe burns. The Coffee Boiler contains water at elevated temperature. Water temperature over 125°F / 52°C can cause severe burns instantly or death from scalding.

WARNING
The machine must not be dipped in, nor splashed with, water in order to clean it. For cleaning operations, please follow the instructions listed below very carefully.

WARNING
This machine is designed only for preparing coffee and hot drinks.

IMPORTANT
To improve the flavor of the espresso, the temperature of the water in the coffee boiler and therefore of the groups may eventually be raised or lowered via the digital display (please consult the Software Programming Manual for detailed instructions).

1) Starting the espresso machine
a) Filling the boilers with water
Once the installation procedures have been completed, it is necessary to fill the boiler tanks with water. Complete the following procedure to properly fill the boiler tanks:

• Coffee boiler
The water flows inside the coffee boiler directly, as soon as the water system and purifier taps (if present) are opened.

Since the inflow of water will compress the air in the boiler, it will be necessary to remove or “bleed” the air from the coffee boilers. All air must be removed in order to completely “saturate” the coffee boiler/ group assemblies.
To remove the air from the boiler, or “bleed the groups”, it will be necessary to remove the plastic keypad from the top of the group.

Loosen the bleed screws one at a time to allow air to escape until water flows from below the screw head. Tighten the screw to stop the water from flowing. Over tightening can cause damage to the sealing washer and the group cover. Repeat this procedure on all groups.

• Steam boiler
Turn the main switch to position “1” or ON, the automatic steam boiler level gauge will be switched on, activating the auto-fill solenoid valve and the motor pump. This will fill the steam boiler to a predetermined level and will shut off when full.

2) Waiting for the Espresso Machine to Heat to Operating Temperature
During this time, it may happen that the pointer of the coffee boiler pressure reaches as high as 14-15 bar. This may happen anytime that the heating element is in the “on” condition. In this case, it is necessary to adjust the expansion valve (see the picture below about the three coffee boiler expasion valves) in such a way that the pressure never exceeds 13 bar.

FIG 22 Waiting for the Espresso Machine.JPG

In normal operating conditions, the coffee boiler pressure transducer, while brewing, can read anywhere from 0-12 bar when brewing.

When the steam boiler reaches operating temperature, the light on the hot water dispense button will switch on.

3) Brewing after first installation
Once the first installation procedures are finished, before proceeding with brewing coffee, hot water and steam, please follow these steps:

• Engage the portafilters by inserting them into each group, brew water through each group for at least two minutes.
• Being careful to avoid burns, turn on each steam wand for at least one minute.
• Turn on the hot water valve for the time necessary to allow the following quantities of water to be brewed:
  – At least 1 liter for a 1/2 group machine
  – At least 2 liters for a 3 group machine

4) Installing the portafilters
Install the portafilter(s) by inserting them into the group and rotate the handle from left to right. When the portafilters are inserted properly, you can press any of brew buttons to start the flow of water through the portafilter. You should allow hot water to pass through the empty portafilter(s) for a few seconds each time, in order to preheat the portafilter.

Note: It is important to leave the portafilters installed in the espresso machine when not in use. The portafilter must remain heated for the brew process to function correctly.

FIG 23 Waiting for the Espresso Machine.JPG

5) Brewing coffee
Now you can brew an espresso. Disengage one of the portafilters, fill the filter with ground coffee, tamp the ground coffee with the tamper supplied (exerting a force of 20 kg) and re-engage the portafilter to the group. Press a button on the keypad to begin the brewing process.

Note: Some baristas believe it is important to press the brewing button prior to installing the portafilter to allow the water to flush any remaining coffee oils and particles from the group. Some also flush just after brewing coffee for the same reason. Please experiment to find the best possible procedure for you.

6) Water pump
Whenever you are brewing coffee, and you can adjust the pump pressure by turning the by-pass screw (below the plug located on the side to which the pump power supply is connected) clockwise to increase and counter-clockwise to reduce pressure.

Adjust pressure only when at least one group is brewing coffee.

Note: When the heating element in the coffee boiler is energized, the water will expand increasing the start-up pressure.

Once the maximum pressure is reached, the expansion (safety) valve should start working by discharging a few drops of water, in order to prevent such pressure from exceeding 11-12 bar.

In case the pressure exceeds 12 bar, you must adjust the expansion valve by unscrewing the cap slightly. If this is not sufficient, remove the valve and clear away any calcium deposits. This remedy is valid also in case the valve remains open in the drain position (i.e. the pressure cannot increase to 8 bar approx.).

7) General notes for coffee preparation
The portafilters must remain heated since they are at the lowest position of the group itself, and they are partially isolated due to the rubber gasket between them.

This can be accomplished by leaving the portafilters installed in the machine when not in use. The portafilters may also be actively heated. This procedure may be carried out by brewing some hot water through the portafilter then turning off the water flow, before making coffee.

We recommend removing the spent coffee puck directly after brewing.

The size of the coffee granules is extremely important in preparing a good cup of coffee, other than the type of coffee mix used, quite obviously. The ideal grinding can be determined by making various coffees using the amount of ground coffee that you would normally use for each cup (we recommend at least 6-7g). The best grinding is that which allows coffee to flow out from the filter holder spouts neither too slowly (drop by drop) nor too quickly (quick light brown flow). A general rule is that a double dose should dispense approximately 25cc or 2 fluid oz. of espresso in approximately 25 seconds.

8) Cup Warmer
Press Cup Warmer Button for enabled or disabled the cup warmer. This function work in two modes continuous or timed (see the Software Programming Manual for further instructions).

FIG 24 Waiting for the Espresso Machine.JPG

5. Dispensing Steam and Hot Water

1. Steaming milk or other liquids
   In order to allow for any condensed water in the wand to be released ALWAYS allow some steam to be discharged by turning on the valve before inserting the steam wand into the pitcher of liquid to be heated. Dip one of the 2 steam wands (part 8, page
2. which are connected to the steam valve, into the liquid to be heated, turn the steam knob gradually until steam comes out at the end of the wand.

The steam will transfer heat to the liquid raising its temperature up to boiling point.
Be careful not to allow liquid to overflow in order to avoid severe burns.

In order to prevent the heated liquid from being sucked back into the steam boiler it is recommended before using the wand that you purge the steam valve and steam wand by opening the valve for a few seconds to allow steam to escape to the atmosphere from the end of the steam wand. Failure to do so can cause the heated liquid to transfer from the heated liquid container to the steam boiler (via vacuum created from cooling parts).

This condition is undesireable and can cause contamination in the steam boiler.
After use remember to purge the wand by opening the steam valve for a few seconds, and then clean the outside of the wand itself with an appropriate cloth.

In order to prepare milk for making cappuccino with the right amount of foam, go through the following steps:

• After purging the steam wand place the container half-full of milk underneath, carefully open the steam valve and raise the container so as to bring the wand end to a point just below the surface of the milk; at this point, move the container up and down just enough to dip the nozzle end in and out of the milk until you get the right amount of foam, bring
the temperature of the milk almost up to 149/158°F or 65/70°C. You can then pour this milk into a cup containing warm espresso and you will end up with a fresh cup of cappuccino.

FIG 25 Dispensing Steam and Hot Water.JPG

6. Maintenance and Periodic Cleaning Operations

FIG 26 Maintenance and Periodic Cleaning Operations.JPG

FIG 27 Maintenance and Periodic Cleaning Operations.JPG

page 25

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