La Marzocco KB90 User Manual

manual

kb90

The kb90 is tailored to suit the needs of the world’s busiest coffee bar, making espresso preparation easier for baristas. La Marzocco, considering the needs of high

volume cafes and their staff, has redesigned the portalter system to reduce the wrist strain of the user. By focusing on simplifying the ne motions, the machine is

able to shave seconds off of the time required to make each drink. The kb90 sets a new standard in high volume cafe performance for La Marzocco.

kb90

certications available:

Operating Manual V1.0 - 09/2018

MAN.22.1

La Marzocco S.r.l.

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

Chapters

1. General Warnings and Safety Specications

2. Denition of Available Models

3. Installation

4. Machine Operation and Coffee Preparation

5. Dispensing Steam and Hot Water

6. Maintenance and Periodic Cleaning Operations

7. De-commissioning and Demolition

8. Mandatory Maintenance and Check-up Operations

9. Precision Scale

10. Straight-in

11. Software Programming Guide

page 3

page 7

page 10

page 16

page 19

page 20

page 23

page 24

page 25

page 27

page 28

1. General Warnings and Safety Specications

WARNING

This machine 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 machine.

WARNING

The Coffee machine must be

placed in a horizontal position on

a counter higher than 80 cm from

the ground.

WARNING

This machine is not suitable

for outdoor use. Jets of water

should not be used to clean the

machine, 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 machine 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

• The weighted sound pressure level of the machine is lower than 70dBA.

• Use, cleaning and

maintenance of this coffee

machine are realized

by people (including children more than 8

• Children should be

• Keep the appliance and

2) This operating manual is an integral and essential

part of the product and

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 the use of the appliance by a person responsible for their safety and if they understand dangers.

supervised to ensure that they do not play with the

appliance.

its cord out of the reach of

children less than 8 years

of age.

must be supplied to users. Users are asked to read the enclosed warnings and cautions 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

machine.

4) Check the machine’s 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 espresso machine.

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 corresponds to those of the main electrical supply which the machine will be hooked up to.

7) The equipment must be installed to comply with the applicable federal, state or local electrical and plumbing

codes. The installation also must comply to the manufacturer’s instructions, and must be performed by qualied and authorized personnel.

8) Incorrect installation may cause for 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 the 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 qualied personnel check such connection.

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

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, being careful not to exceed the 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 machine should not be installed in kitchens.

13) Using any electrical

device requires that certain fundamental rules be observed. In particular:

• do not touch the device

with wet or humid hands

and feet;

• do not use the device while

having no shoes on your

feet;

• do not use extension cords in bath or shower rooms;

• do not unplug the device from the power outlet by pulling on the power supply cable;

• do not expose the device to atmospheric agents (rain, sun, etc.);

• do not allow children or untrained people to use this device;

• do not clean the 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 machine, to the “0” or “OFF” position, and disconnect the machine from the electrical network

by unplugging the cord or

A B

by switching off the relative circuit breaker. For any cleaning operation, follow exclusively the instructions contained in this manual.

15) In case the machine is

operating in a faulty manner or breaks down, disconnect it from the electrical network (as described in the preceding point) and close the water supply valve. Do not attempt to repair it. Contact a qualied and authorized professional to perform any repair. Any repairs must be performed exclusively by the manufacturer or by an authorized centre using only original parts. Non compliance with the above could compromise the safe operation of the machine.

16) You should plan to make use of an omnipolar connector during installation, 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) The machine’s power supply cable must not be replaced by users. In case the power supply cable becomes damaged, shut off the machine and disconnect the

machine from the electctrical network by switching off the relative circuit breaker and close off the water supply; to replace the power supply cord, contact qualied professionals exclusively.

20) Common Dimensions, Weights, and Features

A B

kb90

A [mm]

B [mm]

C [mm]

WEIGHT [kg]

2 groups

810

620

448

3 groups

1050

620

448

101

This operating manual refers exclusively to the following models, of our own manufacture:

8 635

kb90 model 2 and 3 groups

3 3

15 1415 15

2. Denition of Available Models

Legend

1 Main Switch

2 Pressure Gauge

81112

(Steam & Brew water)

3 Brew Groups

4 Control Panel

5 Group #1 Keypad

6 Digital Display

7 Steam Wand

8 Steam Knob

9 Hot Water dispense nozzle

10 Removable Drain Tray

11 Hot Water Button

12 Cup Warmer Button

13 Hot Water Mix Valve

14 Straight-in

15 Precision Scale

Fig. 1 - Model with 2 or 3 groups

For additional information on electronics, keypads, and software programming, please see the section entitled Software Programming your Espresso Machine.

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 7,0 liters 3000 Watts 3 groups 11 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 ttings 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 group accepts the portalter used to hold the ground coffee; the espresso ows through the brewing group, through the portalter basket, through the portalter spout, and into the cup(s) after the brewing button has been pressed.

• 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 autoll system whenever the water boiler needs to be replenished.

• Machine CE plate:

KB90 3AV KB000000 01/18

220-240 7783 33.8 50/60

1.3x3

0.9

11.8

• 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.

• Machine ETL plate:

KB90 3AV

01/18 29-33

KB000000

161

3. Installation

RATED

(W)

RATED

(A)

COFFEE

WATTAGE

STEAM

WATTAGE

POWER CORD

MODEL/SERIES GROUP V/Hz

C220-240V/60H

2GR

AC208-240/60H

KB90

AC220-240V/60Hz

3GR

AC208-240/60Hz

1 X BLUE (NEUTRAL)

3 X WIRES 220V

1 X BROWN (PHASE)

1 X YELLOW & GREEN (GROUND)

POWER CORD: 5 X WIRES 380V

POWER

5666 5360

7783 7324

1 X BROWN (PHASE)

1 X GRAY (PHASE)

1 X BLACK (PHASE)

INPUT

BOILER

1600

24.6

33.8

1600

2400 2400

DRAIN GRATE

DRAIN TRAY

21-24

29-33

1 X BLUE (NEUTRAL)

1 X YELLOW & GREEN (GROUND)

BOILER

TOTAL

WATTAGE

3000 3000

4000 4000

5666 5360

7783 7324

THE DETAILS ON THE LEFT DESCRIBE

HOW TO CONNECT EACH WIRE TO THE PLUG.

RESPECT ALSO THE LOCAL SAFETY

SIZE (mm²)

SEE ELECTRICAL

CONNECTIONS

FOR DETAILS

WARNING

REGULATIONS.

WARNING

The machine is intended to be

permanently connected to xed

wiring, and it is mandatory that

a residual current device (RCD)

with a rated residual operating current not exceeding 30mA is

installed.

EXPANSION VALVE

DRAIN HOSE CONNECTION

Fig. 2 - Installation Guide Fig. 3 - Installation Nomenclature

WARNING

At each installation, the

machine should be equipped

with a new set of tubes for

plumbing and related gaskets.

WARNING

Water pressure supply must

be between 0,2 and 0,6 MPa if

sufcient pressure is not available

we suggest that an additional water

supply system is used.

WARNING

Before making any electrical connections make sure that the two strain relief connectors are

rmly secured to the body of the machine in order to prevent inadvertent stress on the power

cables.

WARNING

This machine should not be

installed in kitchens.

WARNING

Hazardous voltage disconnect

from power supply before

servicing.

WARNING

The motor pump must be

situated close to the machine

in an accessible place for

maintenance but not for

accidental interference and

where there is an optimal air

circulation.

WARNING

The manufacturer declines any

responsibility for any event

leading to liability suits whenever

grounding has not been

completed according to current

local, national, and international

regulations and electrical codes,

or other electrical parts have

been connected improperly.

WARNING

This appliance is not intended

for use by persons (including

children) with reduced physical,

sensory or mental capabilities,

or with lack of experience and

knowledge, unless they have

been given supervision or

instruction concerning the use

of the appliance by a person

responsible for their safety.

WARNING

- U.S.A. and CANDA only - Do not connect to a circuit operating

at more than 150V to ground on

each leg.

WARNING

This machine is not suitable for

outdoor use. Jets of water should

not be used to clean the machine,

nor should it be placed where

water jets are used.

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 F1 = 2A,

250V

WARNING

In order to prevent cracks

or leakage: do not store or

install the Coffee machine

in places where in boiler or

hydraulicsystem to freeze.

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.

• The machine should be placed on a at counter and must be placed in settings with the following temperatures:

Minimum room temperature: 5°C/41°F; Maximum room temperature:

32°C/89°F.

Water specications table

T.D.S. ppm 90 150

Total Hardness ppm 70 100

Total Iron (Fe+2/Fe+3) ppm 0 0,02

Free Chlorine (Cl2) ppm 0 0,05

Total Chlorine (Cl2) ppm 0 0,1

pH value 6,5 8,5

Alkalinity ppm 40 80

Chloride (Cl–) ppm not more 50

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

• If the machine has been temporarily housed in settings with a room temperature of less 0°C/32°F, the machine must be placed in a warmer environment in order to gradually defrost the hydraulic system prior to use.

• Water pressure supply must be between 0,2 and 0,6 MPa.

• This machine complies with the

standard 61000-3-11, the impedance

at the supply interface must be Zmax=

0.03 Ω.

Min. Max.

POSITION OF THE HIGH LEGS MACHINE

16,2 in.

400 mm

HERE THE POSITION OF THE POWER CORD AND

1) Installation on the counter

The image below shows the recommended method to drill the hole on the counter.

WATER INLET HOSES

HERE THE POSITION WHERE WE

SUGGEST TO MAKE THE HOLE

ON THE TABLE

55 mm

2,2 in.

15,7 in.

135 mm

5,3 in.

4,8 in.

123 mm

9,8 in.

250 mm

12,5 in.

318 mm

160 mm

6,3 in.

217 mm

8,5 in.

565mm (2 groups) 22,2 in. (2 groups)

FROM ∅100 TO ∅120 mm

FROM ∅4 in. TO ∅4,7 in.

HERE THE POSITION OF THE DRAIN TUBE

805 mm (3 groups)

31,7 in. (3 groups)

Fig. 4 - Hole on the Counter

3 in.

78 mm

2) Accessories

Check the package to make sure that the following accessories are included:

• a number of 1-dose and 2-dose portalters

orresponding to the number of groups;

• replacement 1-dose and 2-dose lters

(one of each);

• 1 tamper;

• 1 blind lter;

• cleaning detergent, for the groups;

• 3 stainless steel braided hoses for water

connections;

• 1,5 mt of reinforced plastic tubing for

drainage;

• 1 h o se c l a m p .

In order to proceed with installation, it is necessary that the following are available:

412 mm

• Pipes carrying drinking water with a

3/8”G (BSP) end connection; (3/8” Compression for USA and Canada)

• Electrical Supply according to the

specication 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 vepole 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 lling out the online water calculator on our website: LA MARZOCCO WATER CALCULATOR (http:// www.lamarzocco.com/water_calculator/).

4) 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 backow 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 50mg/l . Respecting these values

allows the machine to operate at maximum efciency. If these parameters are not present, a specic ltration device should be installed, while always adhering to the local national standards in place regarding potable water. Then connect the inlet of the water lter/ softener (if present) to the drinking water supply using one of the supplied stainless steel braided hoses. Before connecting the lter to the water pump, ush the water supply line and the ltration 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 lter/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.

5) Electrical connections a) Power supply cord

• This is the main power supply cable

that provides power to the entire espresso

THE MOTOR PUMP MUST BE SITUATED

CLOSE TO THE MACHINE IN AN ACCESSIBLE

PLACE FOR MAINTENACE BUT NOT FOR

ACCIDENTAL INTERFERENCE AND WHERE

THERE IS AN OPTIMAL AIR CIRCULATION

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.

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 gures:

- View of the connectors;

- Cable connection;

6) 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 steellined PVC tubing and suitable hose clamps.

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.

- Cable tightening;

4. Machine Operation and Coffee Preparation

CAUTION

Never remove the lter holder when water is being delivered.

This operation can be extremely

dangerous since the high

pressure built-up inside the blind

lter 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 avor 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 ll the boiler tanks with water. Complete the following procedure to properly ll the boiler tanks:

• Coffee boiler

The water ows inside the coffee boiler directly, as soon as the water system and water lter/softener taps (if present) are opened. Since the inow of water will compress the air in the boiler it will be necessary to remove or “bleed” the air from the coffee boiler. All air must be removed in order to completely “saturate” the coffee boiler/group assemblies. To remove the air from the boiler, “bleed the groups”, it will be necessary to remove the

group cover from the top of the machine. First remove the group tray from the top of the machine exposing the cup tray. Remove the screws securing the group cover and then remove it. Once removed the top of the groups will be exposed. Loosen the bleed screws one at a time (see g.5) to allow air to escape until water ows from below the screw head.

Fig. 5

Tighten the screw to stop the water from owing. Over tightening can cause damage to the sealing washer and the group cover. Repeat this procedure for all groups. Once all air is removed from the coffee boiler, reinstall the group cover by following the removal instructions in reverse.

• Steam boiler

Turn the main switch (item 1 in Fig. 1) to position “1” or ON, the automatic steam boiler level gauge will be switched on, activating the auto-ll solenoid valve and the motor pump. This will ll the steam

boiler to a predetermined level and will shut off when full.

Note: It may happen that the air inside the

steam boiler builds up pressure (which may be detected through the pressure gauge - item 2, g. 1) when the water is allowed to ow in; this “false” pressure must be eliminated by opening the steam valves (item 8, Fig. 1).

b) Turning the espresso machine on

Once you have completed these procedures, check the display. Press enter to conrm that the preceding procedures are complete. The installation is now complete and the espresso machine should be heating to the operating temperatures.

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 gauge 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 (Fig. 3) in such a way that the pressure may never exceed 11-12 bar. In normal operating conditions, the coffee boiler pressure gauge can read anywhere from 0-12 bar. When brewing, the pressure should be set to 9 bar. When the steam boiler reaches operating

temperature, the light on the Hot water dispense button will light. When the espresso machine is ready to operate all lights on the keypads will light.

3) Brewing after rst installation

Once the rst installation procedures are nished, before proceeding with brewing coffee, hot water and steam, please follow these steps:

- Engage the portalters 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 portalters

Install the portalter(s) by inserting them into the group and lift the portalter knob rotating it from top to bottom until the stop position is reached. When the portalters are inserted properly, you can press any of brew buttons to start the ow of water

through the portalter. You should allow hot water to pass through the empty portalter(s) for a few seconds each time, in order to pre-heat the portalter.

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

5) 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 sufcient, 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.).

Filter Basket

Porta Filter

O-ring Gasket

Double Spout

6) Brewing coffee

It is now possible to remove one of the portalters to make an espresso beverage. Place some ground coffee in the lter itself: 1 dose (approximately 6-7 g) for the small lter, 2 doses (2 approximately 1215 g) for the larger lter. Press down on the ground coffee with the supplied tamper and install the lter holder up again to the bottom of the group and then press a button to begin the brewing process.

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

7) Controlling the brew process using volumetric programming

This espresso machine allows the volumetric programming of each of the rst two buttons on each group (numbered left to right). Please consult the

Software Programming Manual for further instructions.

8) General notes for coffee preparation

The portalters 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 portalters installed in the machine when not in use. The portalters may also be actively heated. This procedure may be carried out by brewing some hot water through the portalter then turning off the water ow, before making coffee. It is important to remember that coffee left over in the lters must be removed only when you need to prepare another cup, and only at that time should you place a new dose of ground coffee in the lter.

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 ow out from the lter holder spouts neither too slowly (drop by drop) nor too quickly (quick light brown ow). A general rule is that a double dose should dispense approximately 25cc or 2 uid oz. of espresso in approximately 25 seconds.

9) 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).

Cup Warmer Button

10) Autoclean and Autopurge

If the autoclean function is enabled in the menu, steam will be delivered by the group with a delay of 2 seconds form portalter removal. If the autopurge function is enabled in the menu, hot water will be delivered by the group with a delay of 2 seconds form portalter removal. If the autoclean and autopurge functions are both enabled in the menu, steam and then hot water will be delivered by the group with a delay of 2 seconds form portalter removal.

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 7, g. 1) which are connected to the steam valve, into the liquid to be heated, turn the steam knob (part 8, g. 1) 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 overow 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.

2) Preparing hot water and other hot drinks

HOT WATER

You may dispense hot water by using the xed nozzle (item 9 g 1). To dispense hot water, press the hot water button on the right most group.

This button commands the hot water delivery.

The volume of water delivered may be adjusted via the display (see the Software Programming Manual for further instructions). The temperature of the water dispensed may be adjusted by adjusting the mixing valve under the right side cover of the espresso machine. (only on the models of espresso machine equipped with this accessory)

HOT WATER MIX VALVE

6. Maintenance and Periodic Cleaning Operations

WARNING

If the above-mentioned

instructions are not adhered

to the manufacturer cannot be

held responsible for damage to

persons or things.

WARNING

In order to prevent cracks or

leakage: do not store or install

the coffee machine in places

where temperature may cause

water in boiler or hydraulic

system to freeze.

WARNING

The machine is intended to be

permanently connected to xed

wiring, and it is advisable that

a residual current device (RCD)

with a rated residual operating

current not exceeding 30mA is

installed.

WARNING

The machine must be installed so

that qualied technical presonnel

can easily access it for eventual

maintenance.

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

Do not remove the lter holder while relative group is brewing

hot liquids.

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

This machine is for professional use only and should be installed

in locations where its use and

maintenance is restriced to

trained personnel.

WARNING

Jets of water should not be used to clean the machine, nor should it be placed where water jets are

used.

1) Cleaning groups and drain wells

- Put a tablespoon of detergent powder for coffee machines into the blind lter, supplied with the machine, and tighten it onto the group you want to clean by using a normal lter holder.

- Activate the automating rinsing (backushing) routine (see the Software Programming Manual for more detailed instructions).

- Rinse the group using a normal lter, by running hot water through it several times

2) Cleaning lters

- Put 2 or 3 teaspoons of detergent powder for coffee machines in about 1/2 a litre of water inside a heat-resistant container and boil.

- Dip lters in the boiled solution and leave them fully submerged for about 30 minutes.

- Rinse thoroughly with clean water and run hot water through one group several times with the lters in place.

- Make one cup of coffee and discard in order to remove any unpleasant avor.

3) Cleaning lter holders (portalters)

Using the proper cleaning tool (brush) wash the lter holders under hot water, a neutral detergent may also be used.For extraordinary cleaning see the Portalter Manual.

4) Cleaning the drain collector

Remove the drain tray grill at least twice a week and clean, pull out the water drain collector and clean it thoroughly. Inspect and clean also the drain box and remove any leftover grounds.

5) Cleaning the body

Wipe the stainless steel surfaces with a soft, non abrasive cloth in the direction of the glazing marks, if any. Do not use any alcohol or solvents whatsoever on painted

or imprinted parts in order not to damage

them.

6) Cleaning the hot water and steam nozzles

Steam nozzles must be cleaned immediately after use with a damp cloth and by producing a short burst of steam so as to prevent the formation of deposits inside the nozzles themselves, which may alter the avor of other drinks to be heated. Hot water nozzles must be cleaned periodically with a damp cloth.

7) Cleaning the diffuser screen

- Due to lter holder discharge operations (subsequent to coffee brewing), a certain amount of coffee grounds may slowly build-up on and obstruct, even partially, the diffuser screen. To clean it, you must rst remove it by unscrewing the diffuser screw.

- Put 2 or 3 teaspoons of cleaning detergent for coffee machines in about 1/2 a litre of water inside a heat-resistant container and boil.

Group

Assembly

Diffusor

Screen

Diffusor

Screw

- Place the diffuser screen(s) and diffuser screw(s) in the solution and leave them fully submerged for about 30 minutes. Rinse thoroughly with clean water. Install and run hot water through each group several times with the screen installed.

8) Cleaning the portalter group

After pressing the straight-in release lever, it is possible to use a non-abrasive soft cloth to clean the portalter support. Do not use aggressive solvents on varnished parts or plastic parts to avoid damage. Clean the cover panels using a soft cloth. Only clean with a wet cloth or with a cloth soaked with warm water and neutral soap.

Straight-in Release Lever

Portalter Support

9) Water Filter/Softener

Please see the documentation accompanying the water lter/softener for proper operating and cleaning instructions.

• Steam boiler draining: to activate this function you need to access the programming menu (see page 104). Yearly, we recommend to fully drain the steam boiler by means of the specic drain cock located on the side of the boiler or under the boiler.

10) Depressurize the steam boiler

Press and hold the encoder knob to set the espresso machine to “OFF”, then push down the steam lever in order to depressurize the steam boiler.

IMPORTANT

If the machine has not been used for more than 8 hours or, in any case, after long periods of being idle, in order to use the machine to its full potential it is necessary to perform some cleaning cycles before brewing beverages as follows:

- Groups: with the portalters engaged in the groups brew water through each 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

If the machine is not going to be used for long periods of time, it is advisable to follow these safety indications:

- Disconnect the machine from the water

mains or interrupt the water connection via a mains tap.

- Disconnect the machine from the

electrical mains.

1) De-commissioning and demolition

Start by setting the main switch to the “0” or OFF position.

Disconnecting from the power outlet

Disconnect the espresso machine from the electrical network by switching off the associated circuit breaker or circuit protection device. Remove the power supply cord from the power connection. Remove the Pump Motor Power Cord from the water pump motor.

Disconnecting from the water system

Shut off the water supply by closing the specic tap located upstream of the water lter/softener inlet. Disconnect the water pipe at the water lter/softener inlet.

7. De-commissioning and Demolition

Remove the hose connecting the espresso machine to the water pump. Remove the reinforced plastic tubing on the drain connection.

At this point, the machine may be removed from the bar, being very careful not to drop it or squash your ngers.

The machine is made out of various materials and therefore, if you do not intend to put it back in service, it must be taken to a special disposal company which will select the materials which can be recycled and discard the others.

Current regulations make it illegal to discard such machine by leaving it on public grounds or on any private property.

Recycling notice: Warning for the protection of the environment.

Used Electrical and electronic waste contains hazardous but also valuable and scarce materials which should be recovered and recycled properly. We kindly ask that you contribute to the protection of the environment and natural resources by delivering used equipment to the relevant recycling locations if such locations are available in your country.

8. Mandatory Maintenance and Check-up Operations

These operations are in addition to the Maintenance and Periodic Cleaning Operations as specied in Chapter 6.

The following maintenance and check-up operations sould be carried out by a qualied technician. The time required for the periodic maintenance is determinated by the quantity of daily work and/or coffee consumption.

N.B. These periodic maintenance operations are not covered by warranty.

▪ Replace group gaskets ▪ Replace diffuser screens ▪ Clean auto-fill probe ▪ Check vacuum breaker for

proper operation

▪ Inspect water inlet valve ▪ Inspect drain system for leaks

or clogs

▪ Check flow rate for each group

▪ Rebuild steam assemblies

▪ Replace portafilter baskets ▪ Inspect group valve plungers ▪ Inspect vacuum breaker ▪ Inspect contactor ▪ Inspect expansion valve ▪ Inspect electrical wiring

▪ Check brew temperature ▪ Check that brew pressure is

at 9bar

▪ Check all switches for proper

operation

▪ Check/note water hardness ▪ (Water quality must be within

the range of parameters

specified in the chapter

EVERY SIX/EIGHT MONTHS (in addition to the above)

condition

▪ Inspect boilers safety switches ▪ Replace over-pressure valve

(safety valve)

▪ Accurate control of the

tightness at 2,4Nm of

EVERY THREE/FOUR MONTHS

on Installation, otherwise warranty is voided)

▪ Check filter basket condition ▪ Check shot volumes ▪ Test flowmeter’s ohm value

(ohm value is acceptable if greater than 1.8 K ohm, and less than 2.2 K ohm

EVERY YEAR (in addition to the above)

each cable on the terminal block.

▪ Check the condition of the inside of boilers and if necessary rinse out with a proper cleaning product allowed for food and beverage

EVERY 3 YEARS (in addition to the above)

appliances.

9. Precision Scale

WARNING

Handle with care maximum load

1Kg do not lift.

WARNING

The individual grid of the scale

is a fragile component, handle

and store with care.

WARNING

The height of the bottom tray is

xed.

1) Use precautions

Remove the adhesive label with care; if needed, remove any adhesive residues from the surface using a neutral detergent.

Don’t spill water onto the scale box If needed, gently remove it with an absorbent cloth. Should any water and/or dirt penetrate into the holes highlighted

Fig. 6 - Precision Scale - 2, and 3 brewing groups

in the gure below, gently clean and dry them with an absorbent paper cloth. Dirt build-up or water stagnation may prevent the scale individual grid from properly settling into place.

The weighing system in static conditions (*) has a rated accuracy of ±0.5g. For correct operation, make sure that:

Legend

1 Scale crosspiece

2 Drain grille

Scale individual grid

Removable drain tray

• Maintenance is performed properly, by an authorized person and in the manner prescribed in this manual;

• Please use the machine according to the instructions specied in this manual;

• Please make sure the machine is installed on a level and rm counter;

• Please make sure the power supply is stable and without electrical noises.

The weighing stage is a inherently delicate, in fact it is affected by:

• Vibration of the bench caused for example by other devices;

• Machine vibrations caused, for example, by the use of the adjacent group.

(*) Static weighing means weighing an

object whose weight is xed during the entire weighing.

The machine is not a weighing device certied for legal weighing.

- The weighing system is a precision device that requires a lot of caution in terms of use, cleaning and maintenance.

- Should the main grid or tray be removed, ensure not to hit the load cells during the disassembly and reassembly operations.

- To proceed with the weighing of the lter holder either empty or lled with coffee powder, place it as shown below:

- Use only original La Marzocco lters and lter holders, identied by the following symbol:

- Use only lter holders with double spout;

- Do not place on the scale objects weighing more than 1kg;

- Never load more than 1 kg, to prevent any damage to the scales;

- Use the high precision scale with care, avoid shocks, falling objects and sudden load peaks;

- Any object to be weighed must be placed correctly on the scales grid.

2) Cleaning

- The cleaning of the “individual grids” must be performed with care, without overloading the cells;

- For proper weighing of the lter holder, make sure the grid is clean and dry;

- To avoid contact with dirt before placing the lter holder, clean and dry the grid;

- Please be careful during the cleaning procedures to avoid the water dripping on the scale and its electrical components;

- Don’t wash the scale individual grids in a dishwasher; wash them manually instead,

then immediately dry them.

If you wash the grid under a strong water ow, remove the magnetic support highlighted in the gure (just pull to detach the magnets). Make sure that the magnets are always dry and clean.

- To clean the drain tray you need to remove the individual grids (part 3, gure 6) rst, then the drain grille (part 2, gure 6) and nally the tray (part 4, gure 6). Make sure not to hit the load cells during the disassembly and reassembly operations.

3) Removing the electronic box

To remove the electronic box you need to remove the drain tray, unscrew and remove the lower screws 1, loosen the upper screws 2 without removing them and move the scale crosspiece up. Now you can access the electronic box or remove it.

1) Installing the portalters

10. Straight-in

Straight-in

2) Removal the portalters

Press

Insert

Rotate

Extract

11. Software Programming Guide “Barista” Programming

PUSH

94.4 00:00

95.5 95.1 SB

page

Press and hold the T3 button for 5 seconds.

Group Dose

page 41

Volume Dose

page 41

Settings

Progra m

Scale

Con figuration

page 55

Scale Tare Time

page 55

Progra m

Mass Dose

page 43

Water Dose

page 57

ENABLED

Water Dose

Settings

page 57

Scale S ettings

Ex it

page 56

G1 Dos e

Settings

page 45

Group 1 M ode

PULSES

page 45

Water Dose

page 59

Coffee Boiler

page 60

Ex it

Coffee B oiler 1

page 60

page 51

page 46

Settings

ENABLED

Copy Dose

G1B1 Dos e

“Barista” Programming

PUSH

Pre-Inf

Settings

page 62

Group 1 Pre-Inf

0s Wet 0s Hold

page 62

CB1 Temperature

94,5°C 95,0°C

page 61

Reset

Volume Doses

page 53

Ex it

Group 1

page 46

Cup Warmer

DISABLED

page 64

Pre-Inf Settin gs

Ex it

page 63

CB Settin gs

Ex it

page 61

Group Dose

Ex it

page 53

Auto Clean

page 66

ENABLED

Auto P urge

page 68

ENABLED

page 70

Ex it Menu

94.4 00:00

PUSH

95.5 95.1 SB

page

Enter Password

page 38

“Technical” Programming

Press and hold the T3 button for 10 seconds.

page 71

Language

ENGLISH

Auto P urge

ENABLED

page 125

Coffee Dose

Cou nter

page 127

Te mp U nit s

page 73

CELSIUS

Auto Clean

ENABLED

page 123

Filter Alarm

Settings

page 130

LaMarzocco

page 75

Name

Eco Mod e Settings

page 121

Settings

page 133

Reset

Group Dose

page 77

Settings

Auto On/Off

Settings

page 118

Firm wa re

page 135

Upd ate

+ 110 hidden pages