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General Notes for Coffee Preparation. 

 The porta

fi

 lters 

must remain heated since they are at the lowest position 
of the group itself, and they are partially isolated from the 
same due to the rubber gasket between them. This can 
be accomplished by leaving the porta

fi

 lters installed in 

the machine when not in use.  The porta

fi

 lters may also 

be actively heated.  This procedure may be carried out 
by activating one of the brew buttons to 

fl

 ush hot water 

through the porta

fi

 lter then turning off the water 

fl

 ow.

The size of the coffee granules is extremely important 

in preparing a good cup of coffee, other than the type of 

coffee blend 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 6g).  The best 

grinding is that which allows coffee to 

fl

 ow out from the 

fi

 lter holder spouts neither too slowly, drop by drop, nor 

too quickly.  A general rule is that a double dose should 

dispense approximately 60mL / 2 

fl

 uid oz. of espresso in 

approximately 25 seconds.  This time may be adjusted 
by varing the corseness of the grind.  

IMPORTANT 

  To  improve  the 

fl

 avor  pro

fi

 le  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 Guide for detailed 

instructions).

5.

6.

7.

Key Features

Controlling  the  Brew  Process  Using  Volumetric 
Programming.

    This  espresso  machine  allows  the 

volumetric programming of each of the 

fi

 rst 4 buttons on 

each group (numbered left to right).  Please consult the 
Software Programming Guide for further instructions.

Hot  Water  dispensing  or  “Tea  Water”.

    Hot  water 

may  be  dispensed  from  the  Hot  Water  Wand  on  the 
right  side  of  the  machine.    This  is  accomplished  by 
pressing the hot water button (button #6).  The amount 
of water dispensed can be programmed via the digital 
display.  Please consult the Software Programming Guide 
for programming instructions.  The temperature of the 
hot water may be adjusted slightly via the Hot Water 
Adjusting Knob.  This adjusting knob is hidden under 
the  right  side  panel  assembly.    The  knob  protrudes 
slightly form the bottom of the side panel.  To 

fi

 nd this 

knob, look at the bottom edge of the right side panel.  
The knob may be turned by sliding a 

fi

 nger under the 

side panel from front to rear (to decrease temperature) 
or from rear to front (to increase temperature).

Quick  Keys

.    The  GS/3  has  4  Quick  Keys  to  allow 

the  user  to  gain  quick  and  easy  access  to  important 
parameters that may be changed frequently.  Please 
see the Software Programming Guide

Water and Drain Connection Kit. 

 The GS/3 comes with 

a main water supply and waste drain connection kit.  This 
kit allows the GS/3 to be connected to the main water 
supply and the main waste drain system.  Instructions 
for installing this kit are contained in the GS/3 Installation 
Guide.  The conversion kit contains the following items:

1.

2.

3.

4.

WARNING

!

!

Do not remove the portafilter when 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

!

!

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 200

°

F / 93

°

C -  Steam Boiler 

260°

F / 125

°

C) 

L309

L312

L037/2P G R

L325 / L326

WARNING

!

!

The expansion valve can discharge water as hot as

200

°

F / 93

°

C.  Adequate protection for handling this 

component is needed before atempting to adjust. 

English

9

La Marzocco, S.r.l.        Firenze, Italia

Key Features

Version 1.00

Summary of Contents for GS/3

Page 1: ...Version 1 00 HANDMADE IN FLORENCE GS 3 Owner s Manual...

Page 2: ...S 3 or to find others to share information about the GS 3 please visit our website at www lamarzocco com Here you will find a section dedicated to La Marzocco GS 3 users To gain access you will need t...

Page 3: ...www lamarzocco com Table of Contents General Information 3 Accessories 4 Machine Description 5 Installation 6 Operation 8 Key Features 9 Preventative Maintenance and Cleaning 10 La Marzocco History 1...

Page 4: ...d safety regulations being careful not to exceed the power and current ratings indicated on such adapters and extension cords This device must be used exclusively for the functions it has been designe...

Page 5: ...PER 1 UT005 HEX KEY 5mm 1 L037 2PGR DRAIN BOX HOSE BARB 1 L325 L326 STAINLESS STEEL BRAIDED HOSE 1 4G TO 5 16 24 UNF 1 L309 ARMORED DRAIN HOSE CLEAR 1 L312 HOSE CLAMP 2 L120 2A WASHER FLAT SEALING TYP...

Page 6: ...isplay Keypad Steam Wand Coffee Boiler Pressure Gauge Pressure gauge Steam Boiler Hot Water Steam Activation Lever Figure 2 Machine Description Main Power Switch Cup Tray Group Head Group Cover Englis...

Page 7: ...screw head It may be necessary to activate the brew process by pressing button 5 the continuous button to force the air out of the group Tighten the screw to stop the water from flowing Over tightenin...

Page 8: ...f it becomes necessary to change the pressure please use the following procedure 1 Remove the left side cover assembly 2 Locate the water pump adjustment screw and loosen the lock nut 3 Adjust the wat...

Page 9: ...the full on position only 1 2 3 Filter Basket Portafilter Handle Spout Figure 8 Portafilter The steam will transfer heat to the liquid raising its temperature Be careful not to allow liquid to overfl...

Page 10: ...dispensed from the Hot Water Wand on the right side of the machine This is accomplished by pressing the hot water button button 6 The amount of water dispensed can be programmed via the digital displ...

Page 11: ...through the group several times with the filters in place Make one cup of coffee and discard in order to remove any unpleasant flavor remaining from the cleaning process Cleaning the Drain Box Remove...

Page 12: ...drain and tip machine at an angle to point the valve into the waste drain Drain the coffee boiler loosen the expansion valve until water begins to flow freely Then remove the group cap cover and loos...

Page 13: ...GS 3 English 12 www lamarzocco com Preventative Maintenance and Cleaning Version 1 00...

Page 14: ...ty of obtaining the machinery and raw materials needed However such was the ingrained enthusiasm and entrepreneurial spirit that on 4th December 1945 a new patent was registered which was extended and...

Page 15: ...technicians new bilingual staff to facilitate relations with foreign markets and new staff specialised in research and development of the commercial sector All this helped us to Increase production i...

Page 16: ...La Marzocco S r l Via Bolognese 68 Pian di San Bartolo 50010 Firenze Italy Tel 39 055 401 390 Fax 39 055 401 349 Email info lamarzocco com www lamarzocco com HANDMADE IN FLORENCE...

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