La Marzocco Strada EP User Manual

manual

strada ep 1.1

Electronically controlled gear pumps provide precise, direct pressure control. Motor speed control with La Marzocco‘s classic paddle interface. Absolute and direct control of pressure at any point during the extraction.

Manuallt operated by the Barista.

Record feature to program and reproduce pressure profiles.

strada ep 1.1

Operating Manual V4.1 - 12/2016

MAN.9.1.01

Chapters

1.	General Warnings and Safety Specifications	page 3
2.	Definition of Available Models	page 5
3.	Installation	page 8
4.	Machine Operation and Coffee Preparation	page 16
5.	Dispensing Steam and Hot Water	page 19
6.	Maintenance and Periodic Cleaning Operations	page 20
7.	De-commissioning and Demolition	page 22
8.	Mandatory Maintenance and Check-up Operations	page 23
9.	Software Programming Guide	page 24

certifications available:

La Marzocco S.r.l.

Via La Torre 14/H

Località La Torre

50038 Scarperia e San Piero

(Firenze) - ITALIA

www.lamarzocco.com

[e-mail]

T: [phone] F: [phone]

EN

1. General Warnings and Safety Specifications

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.

1)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 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.

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

3)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.

4)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.

5)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.

6)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 qualified and authorized personnel.

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

8)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 qualified personnel check such connection.

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

10)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.

11) 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.

12) 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; EN

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EN

•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;

•donotexposethedevicetoatmospheric 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.

WARNING

THE COFfEE MACHINE MUST BE PLACED IN A HORIZONTAL POSITION ON A COUNTER HIGHER THAN 80 CM FROM THE GROUND.

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

14)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

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it. Contact a qualified and authorized professional to perform any repair. Any repairs must be performed exclusively by themanufacturerorbyanauthorizedcentre using only original parts. Non compliance with the above could compromise the safe operation of the machine.

15)You should plan to make use of an omnipolar connector during installation, as required by local, national, and international electrical codes and regulations.

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

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

18)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 qualified professionals exclusively.

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).

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.

1)Common Dimensions, Weights, and Features

A B

C

STRADA EP	2 groups	3 groups
A [mm]	800	1000
B [mm]	675	675
C [mm]	475	475
WEIGHT [kg]	70	91

2. Definition of Available Models

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

STRADA 3 group Electronic Paddle: 3EP

			Legend
			1	Group Display
			2	Main Switch
		9	3	Steam Wand Lever
	9		4	Electronic Brew Paddle Lever
			5	Hot Water Wand
			6	Hot Water Mix Valve
			7	Hot Water Switch
			8	Programming Display
	14		9	Steam Wand Protection
			10	Steam Wand
			11	Removable Drain Tray
	15		12	Waste Water Hose Holder
			13	Programming Jog Wheel
			14	Drain Tray Grate
			15	USB Key Connection

	For additional information on electronics,
	keypads, and software programming,
	please see the section entitled Software
	Programming your Espresso Machine.
Fig. 1 - Model EP with 2 or 3 groups	5EN

1) General description

The machine is built in 2 or 3 coffee group versions and is essentially composed of the following parts:

•Steam Boiler (produces steam and hot water);

•2 or 3 coffe boiler (“saturation”)

•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
				EN		cylindrical tank and on one of them there
						is a housing for the water heating element,
						6

which allows the steam boiler to reach operatingpressurewithinapproximately25 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 which is made of AISI 300 series

stainless steel. One each group (hot water generator for brewing coffee).

Each unit is subjected to a hydraulic test, at a pressure of 18 bar, and has an operating pressure of 9 bar. The following, table is a list of effective volumes 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 welded at either end of the cylindrical tank and on one of them there is a 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.

•Operatingtemperature95°C(adjustable), controlled automatically by an electronic temperature controller with an accuracy of 0.2°C. Operating pressure of 9 bar, developed mechanically by a special positive-displacement pump which

is activated automatically every time coffee is brewed.

•Pressure is displayed through a pressure gauge with a scale from 0 to 15 bar.

•Safety device, based on an expansion type mechanical valve, with counteracting 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 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

It consists of a stainless sheet steel body. The structure has been the object of specific studies to provide good aesthetics, lower ergonometric costs for the operator and reduce the chance of damage to a minimum.

• Sound pressure

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

• Water pump

There are two type of pump workink on this model of Strada:

• Rotary vane positive displacement pump set-up to operate anytime an electric level gauge whenever the steam boiler needs to be replenished.

• Magnetic drive gear pump to operate whenever brewing coffee following manual or preset pressure profile from 0 to 12 bar.

7EN

3. Installation

				RATED	RATED	COFFEE	STEAM	TOTAL	POWER CORD
	MODEL/SERIES GROUP		V/Hz	POWER	INPUT	BOILER	BOILER		SIZE (mm²)
								WATTAGE
				(W)	(A)	WATTAGE	WATTAGE
		2GR	AC220-240V/60Hz		20-22			4600 SEE ELECTRICAL
			AC208-240/60Hz	4600	23	1600	3000
	STRADA EP		AC380/50Hz		12				CONNECTIONS
			AC220-240V/60Hz		25-29
						2400	4000	6400
		3GR	AC208-240/60Hz	6400	30,5				FOR DETAILS
			AC380/50Hz		16
			POWER CORD:
	3 X WIRES 1 X BLUE (NEUTRAL)		5 X WIRES 1 X BROWN (PHASE) 1 X BLUE (NEUTRAL)					WARNING
	220V	1 X BROWN (PHASE)	380V	1 X GRAY (PHASE) 1 X YELLOW & GREEN (GROUND)
		1 X YELLOW & GREEN (GROUND)		1 X BLACK (PHASE)				THE DETAILS ON THE LEFT DESCRIBE
								HOW TO CONNECT EACH WIRE TO THE PLUG.
								RESPECT ALSO THE LOCAL SAFETY
								REGULATIONS.

			210 mm	HERE THE POSITION OF THE POWER CORD AND
				WATER INLET HOSES
			4 in.
		55 mm		FROM 80 TO 100 mm		HERE THE POSITION WHERE WE
		2,1 in.				SUGGEST TO MAKE THE HOLE
				FROM 3 in. TO 4 in.		ON THE TABLE
	mm in.	130 mm 5,1 in.					94 mm	3,7 in.
425 mm 16,7 in.	280 11						328 mm	13 in.
HERE THE POSITION
OF THE DRAIN TUBE
		140 mm
		5,5 in.		775 mm (2 groups)	975 mm (3 groups)		12,5 mm
				30,5 in. (2 groups)	38 in. (3 groups)		0,5 in.

POSITION OF THE HIGH LEGS MACHINE

EN	8
	Fig. 2 - Installation on the counter

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 30 mA 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)

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 3 bar

Flow rate lower than 100 l/h

Installation with the rotary pump (set to 3 bar) immediately after the water treatment system, upstream of the tee.

Enter the programming menu and enable the second pump.

POWER SUPPLY

CORD

MAIN SWITCH

AND ELECTRICAL SUPPLY CONNECTION

WASTE/DRAIN

STEAM COFFEE

BOILER BOILER

TEE FITTINGS

WATER CHECK POINT:

FLOW RATE < 100 l/h

PRESSURE < 3 BAR

PRESSURE GAUGE:

PRESSURE = 3 BAR

BRAIDED HOSE

MAIN WATER

SUPPLY VALVE

Fig. 3 - Installation guide - type 1

	WATER TREATMENT
POMPA ROTATIVA	RECOMMENDED VALUES

www.lamarzocco.com/water_calculator

9EN

EN

Pressure higher than 3 bar

Flow rate higher than 100 l/h

Installation of the pressure reducer (set to 3 bar with a flow rate of at least 100 l/h) immediately after the water treatment system, upstream of the tee.

Water treatment system + pressure reducer, reducing the flow rate within the recommended range NEVER LESS THAN 100 l/h.

POWER SUPPLY
CORD	STEAM	COFFEE
	BOILER	BOILER
MAIN SWITCH		TEE FITTINGS
AND ELECTRICAL SUPPLY CONNECTION
WASTE/DRAIN
		BRAIDED HOSE

PUNTO DI CONTROLLO ACQUA:

PORTATA ≥ 100 l/h PRESSIONE ≥ 3 BAR

PRESSURE REDUCER

WATER CHECK POINT:

FLOW RATE ≥ 100 l/h

PRESSURE = 3 BAR

WATER TREATMENT

RECOMMENDED VALUES

Fig. 4 - Installation guide - type 2

www.lamarzocco.com/water_calculator

10

MAIN WATER SUPPLY VALVE

Pressure higher than 3 bar

Flow rate lower than 100 l/h

Installation of the pressure reducer (set to 3 bar) immediately after the water treatment system, upstream of the rotary pump.

Installation of the rotary pump (set to 3 bar) immediately after the pressure reducer, upstream of the tee.

Enter the programming menu and enable the second pump.

POWER SUPPLY

CORD

MAIN SWITCH

AND ELECTRICAL SUPPLY CONNECTION

WASTE/DRAIN

POMPA ROTATIVA

STEAM COFFEE BOILER BOILER

TEE FITTINGS

WATER CHECK POINT:

FLOW RATE < 100 l/h

PRESSURE > 3 BAR

PRESSURE GAUGE:

PRESSURE = 3 BAR

BRAIDED HOSE

PRESSURE REDUCER

PRESSURE = 3 BAR

WATER TREATMENT

RECOMMENDED VALUES

www.lamarzocco.com/water_calculator

MAIN WATER SUPPLY VALVE

Fig. 5 - Installation guide - type 3 EN

11

EN

1) Accessories

WARNING

AT EACH INSTALLATION, THE MACHINE SHOULD BE EQUIPPED WITH A NEW SET OF TUBES FOR PLUMBING AND RELATED GASKETS.

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

•1 x SINGLE and 3 x DOUBLE portafilters

•2 x SINGLE and 4 x DOUBLE filters

•1 x tamper

•1 x blind filter

•1 x cleaning detergent

•3 x stainless steel braided hose for water connections

•1 x 1,5 mt of reinforced plastic tubing for drainage

•1 x hose clamp

•1 x TEE Fitting

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

12

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.

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 flat 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

•If the machine has been temporarily housed in settings with a room temperature of less than 0°C/32°F, please contact a service technician prior to use.

•Water pressure supply must be between 2 and 6 bar.

2) 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/).

3) 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.

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.

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 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).

WARNING

HAZARDOUS VOLTAGE DISCONNECT FROM POWER

SUPPLY BEFORE SERVICING.

WARNING

WATER PRESSURE SUPPLY MUST BE BETWEEN 4 AND 8 BAR IF SUFFICIENT PRESSURE IS NOT AVAILABLE WE SUGGEST THAT AN ADDITIONAL WATER SUPPLY SYSTEM IS USED

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

CAUTION

BEFORE MAKING ANY ELECTRICAL CONNECTIONS MAKE SURE THAT THE TWO STRAIN RELIEF CONNECTORS ARE FIRMLY SECURED TO THE BODY OF THE MACHINE IN ORDER TO PREVENT INADVERTENT STRESS ON THE POWER CABLES.

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: EN

13

•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

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.

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:

- View of the connectors;

-Cable connection;

-Cable tightening;

EN

14

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 steel-lined PVC tubing and suitable hose clamps.

WARNING

REPLACE FUSES WITH THE SAME SIZE, TYPE AND

RATING F1 = 2A, 250V

WARNING

- U.S.A. AND CANADA ONLY -

DO NOT CONNECT TO A CIRCUIT OPERATING AT MORE

THAN 150V TO GROUND ON EACH LEG.

Water specifications table

		Min.	Max.
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 specified in the section “installation”)

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

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 HYDRAULICSYSTEM TO FREEZE.

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. EN

15

EN

4. Machine Operation and Coffee Preparation

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 water filter/softener 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 boiler.

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 cap and the handle from the top of the group.

16

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, then push the encoder knob for three seconds and the automatic steam boiler level function 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.

Note: Air inside the steam boiler may build up pressure (which may be detected through the pressure gauge).

Once the pump stops, check the display, the message “Coffee Boiler Filled?” should be displayed. Push the Encoder Knob to confirm that the preceding procedures are complete.

The installation is now complete and the espresso machine should be heating to 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 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.

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

	GR2	GR3	of water to be brewed:
GR1			- At least 1 liter for a 1/2 group machine
			- At least 2 liters for a 3 group machine

not in use. The portafilter must remain heated for the brew process to function correctly.

Filter Basket

Porta Filter

O-ring Gasket

Double Spout

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

The steam boiler pressure is visible through a pressure gauge placed inside the machine, behind the control and the 1st group.

When the steam boiler reaches operating temperature, the light on the Tea 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

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 move the electronic Brew Paddle Lever 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 pre-heat the portafilter.

Note: It is important to leave the portafilters installed in the espresso machine when

5) Brewing coffee

It is now possible to remove one of the portafilters to make an espresso beverage through the manipulation of the pressure to your taste.

The Strada Electronic Paddle is an formidable appliance for making espresso beverage that could develop extraction water pressure from 0 to 12 bar as you go.

Press down on the ground coffee with the supplied tamper and install the filter holder to the bottom of the group.

Move the paddle to begin the brewing process. As soon as you start to turn the lever placed on top of the group the magnetic drive gear pump will pushing water into the portafilter.

By turning the lever of the Electronic Paddle

17EN

it is possible to vary the speed of the gear pump, as much it will be turned as faster the pump will go.

Note: Some baristas suggest flushing the group with water to remove remaining coffee oil or particles. Some flush after every shot. Experimentation and practice is suggested to establish the best possible procedure for brewing coffee.

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.

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.

It is important to remember that coffee left over in the filters 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 filter.

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.

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.

IMPORTANT

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

EN

18

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 (item 10, page 5) which are connected to the steam valve, into the liquid to be heated. Move the steam wand lever 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.

2) Preparing tea and other hot drinks

TEA

You may dispense hot water by using the fixed nozzle (item 5 page 5). To dispense hot water, press the tea water button.

This button commands the hot water delivery.

The temperature of the water may be adjusted by adjusting the mixing valve.

19EN

6. Maintenance and Periodic Cleaning Operations

WARNING

THE MACHINE MUST BE INSTALLED SO THAT QUALIFIED

TECHNICAL PERSONNEL CAN EASILY ACCESS IT FOR

EVENTUAL MAINTENANCE.

caution

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.

1) Cleaning groups and and drain wells

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

caution

DO NOT REMOVE THE FILTER 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.

						- Turn the Paddle Valve on and off
						approximately 10 times (10 seconds
						intervals) on each group.
						- Rinse the group using a normal filter,
				EN		by running hot water through it several
						20
						times.

2) Cleaning filters

-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 filters 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 filters in place.

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

3) Cleaning filter holders (portafilters)

Using the proper cleaning tool (brush) wash the filter holders under hot water, a neutral detergent may also be used.For extraordinary cleaning see the Portafilter 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 flavor of other drinks to be heated. Hot water nozzles must be cleaned periodically with a damp cloth.

7) Cleaning the diffuser screen

- Due to filter 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 first remove it by unscrewing the diffuser screw.

GROUP

ASSEMBLY

DIFFUSER

SCREEN

DIFFUSER

SCREW