Thank you for purchasing the La Marzocco GS3 dual boiler espresso machine. Your new machine features a saturated group head, PID temperature control, shot timer, volumetric shot dosing, and a rotary pump that can be direct plumbed or run on its internal reservoir. In this manual, you should find everything you to need to operate and maintain your machine. Please read carefully before using your machine. And if we've missed anything, you always know how to contact us. Let's get started!
* NOTE: ALWAYS KEEP YOUR ORIGINAL PACKAGING IN CASE OR RETURN FOR SERVICE
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a. Remove the left side cover assembly.
b. Locate the water pump adjustment screw and loosen the lock nut.
c. Adjust the water pump pressure to the desired measurement.
d. Rotate Clockwise to increase pressure and counter clockwise to reduce pressure.
NOTE: The water pump pressure should be adjusted when the machine is operating and coffee is present in the portafilter.
Note: Some users believe it is important to allow water to pass through the the group head prior to installing the portafilter to flush any remaining coffee oils and particles from the group head. Some also flush just after brewing for the same reason. Please experiment to make the best possible procedure for your coffee. There are many techniques for brewing espresso. You can find instructions for many techniques on websites, blogs and forums. Some are even monitored by professional baristas around the world.
3. Dispensing Steam - 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 the steam wand into the liquid to be heated. Depress the steam valve lever to activate the steaming process. The steam valve has a variable flow control. The steam valve will lock in the fully on position only. The steam will transfer heat to the liquid raising its temperature. Be careful not to allow liquid to overflow in order to avoid severe burns. Steaming milk for cappuccinos and other beverages is very easy but making it just right requires some skill. Please experiment with various techniques to find the best method for your milk. You can find many discussions about the steaming of milk on the internet.
NOTE: It is important to have a sufficient volume of liquid in the steaming pitcher. Therefore if you intend to steam small amounts of milk it is necessary to use a small pitcher. If you intend to steam larger quantities of milk then it is necessary to use a larger steaming pitcher. Using too little milk in a steaming pitcher can allow the milk to be “blown out” of the pitcher. A good rule to follow is to fill the steaming pitcher only half full of liquid.
NOTE: In order to prevent the heated liquid from being sucked back into the steam boiler it is recommended that you purge the steam system after heating any liquid. Purge the system by opening the steam 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 steaming pitcher to the steam boiler (via vacuum created from cooling parts). This condition is undesireable and can cause contamination in the steam boiler.
4. Dispensing Hot Water - You may dispense hot water by using the hot water nozzle. To dispense hot water press the hot water button.
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 (see machine description diagram, Figure 2, and the instructions on the next page).
***THE COFFEE BOILER AND STEAM BOILER CONTAIN WATER AT ELEVATED TEMPERATU-RE. WATER TEMPERATURE OVER 125°F/52°C CAN CAUSE SEVERE BURNS INSTANTLY OR DEATH FROM SCALDING (COFFEE BOILER 200°F/93.3°C-STEAM BOILER 260°F /127°C) **
***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 **
N.B. 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:
** If the above-mentioned instructions are not adhered to the manufacturer cannot be held responsible for damage to persons or things. **
PREVENTATIVE MAINTENANCE AND CLEANING
1. Cleaning the Diffuser Screen- During the discharge operation (subsequent to coffee brewing), small amounts of coffee grounds may slowly build-up on and obstruct, even partially, the diffuser screen. Turn off the machine and remove the diffuser screen by unscrewing the diffuser screw. Soak in detergent powder liquid following the instructions of detergent manufacturer. Rinse thoroughly with clean water. Install and run hot water through the group head several times with the screen installed.
2. Cleaning the Brewing System- Insert the blind filter into portafilter and put the correct amount of espresso cleaning product (following the product’s instructions) into the filter, engage the portafilter into the group you want to clean.
3. Cleaning Filter Baskets and Portafilters- With daily cleaning of the stainless steel filters and portafilters it is sufficient to clean them with water and a cloth or appropriate brush. Otherwise, using an espresso cleaning product, following the product’s instructions put the correct dose in about 1/2 a litre of water inside a heat-resistant container and heat.
4. Cleaning the Drain Box- Remove the drain box assembly and wash each of the components with hot soapy water. Rinse thoroughly and reinstall the drain box assembly. All components of the drain box assembly are dishwasher safe. 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, imprinted, or plastic parts in order not to damage them. Clean the side panels using
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, imprinted, or plastic parts in order not to damage them. Clean the side panels using a soft cloth. Do not spray the keypad or display with any liquid. Clean only with a damp soft cloth.
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. If milk residue is present on the steam wand, soak the tip in a container of hot water, then it will be possible to wipe the tip clean. Repeat process if residue remains. NOTE: This cleaning schedule is based upon a moderate to average use (20- 300) cups per day. If machine use is less than moderate then this schedule may be adjusted accordingly.
1. Draining Boilers. Both the coffee boiler and the steam boiler may be drained and refilled to reduce the chance of mineral deposits build up on the inside walls of the inside surfaces. Additionally, this draining process can be used to remove water that has a bad odor or taste.
Drain the Steam Boiler: Turn OFF the machine. Remove the left side panel assembly. Locate the ball valve on the bottom left side of the machine. Hold the ball valve with one tool and remove the brass cap on the end of the valve. Move the espresso machine close to a waste drain and tip machine at an angle to point the valve into the waste drain.
Drain the Coffee Boiler: Turn OFF the machine. Using adequate protection or an appropriate tool, loosen the expansion valve until water begins to flow freely. Then remove the group cap cover and loosen the bleed screw. When finished draining empty the drain box assembly.
2. Clean the Water Reservoir. The water reservoir needs to be cleaned periodically to ensure that no algae forms on the inside surfaces. To clean first remove the water reservoir form the machine. Disconnect the clear plastic water intake hose. Unscrew all screws from the cover to separate the parts. Wash all parts with warm soapy water. All parts are dishwasher safe.
Now you're ready to start pulling shots! Check out our All About Coffee & Milk section to learn about steaming milk, latte art, our suggested starter espresso recipe and much more!